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Photoactive Naphthalene Diimide Functionalized Titanium-Oxo Clusters with High Photoelectrochemical Responses
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作者 杨雨 赵启新 +1 位作者 郑琦 宣为民 《Journal of Donghua University(English Edition)》 CAS 2023年第6期590-599,共10页
Photoactive functionalized titanium-oxo clusters(TOCs)are regarded as an important model compound for dye-sensitized titanium dioxide solar cells.However,the dyes used for sensitizing TOCs are still limited.Herein,two... Photoactive functionalized titanium-oxo clusters(TOCs)are regarded as an important model compound for dye-sensitized titanium dioxide solar cells.However,the dyes used for sensitizing TOCs are still limited.Herein,two cyclic TOCs are reported,namely,[Ti_(6)(μ_(3)-O)_(2)(Oi-Pr)_(8))(LA)_(2)]·i-PrOH(S1)and[Ti_(6)(μ_(3)-O)2(Oi-Pr)_(8))(LV)_(2)]·i-PrOH(S2),which are functionalized by photoactive naphthalene diimide(NDI)chromophores.Their molecular structures and photophysical and photochemical properties were systematically studied.As shown by ultraviolet-visible(UV-vis)spectra and photocurrent study results,the band gap and the photocurrent response of S1 and S2 were derived from NDI ligands which extend the absorption edge of S1 and S2 approaching 500 nm and afford high photocurrent densities of 2.12μA/cm^(2)and 1.95μA/cm^(2)for S1 and S2,respectively,demonstrating the significance of the photoactive ligand in modulating photoresponse of TOCs.This work is expected to enrich the structural library of photoactive TOCs and provide insights into understanding the structure-property relationships of sensitized clusters. 展开更多
关键词 titanium-oxo cluster naphthalene diimide photoactive photoelectrochemical response
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Rheological and physicomechanical properties of rod milling sand-based cemented paste backfill modified by sulfonated naphthalene formaldehyde condensate
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作者 Qinli Zhang Hao Wu +3 位作者 Yan Feng Daolin Wang Huaibin Su Xiaoshuang Li 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2023年第2期225-235,共11页
Rod milling sand(RMS)—a coarse sand aggregate—was recycled for cemented paste backfill(CPB)for the underground mined area at the Jinchuan nickel deposit,named rod milling sand-based cemented paste backfill(RCPB).The... Rod milling sand(RMS)—a coarse sand aggregate—was recycled for cemented paste backfill(CPB)for the underground mined area at the Jinchuan nickel deposit,named rod milling sand-based cemented paste backfill(RCPB).The adverse effects of coarse particles on the transportation of CPB slurry through pipelines to underground stopes resulting in weakening of the stability of the backfill system are well known.Therefore,sulfonated naphthalene formaldehyde(SNF)condensate was used for the performance improvement of RCPB.The synergistic effect of solid content(SC),lime-to-sand ratio,and SNF dosage on the rheological and physicomechanical properties,including slump,yield stress,bleeding rate,uniaxial compressive strength(UCS),as well as mechanism analysis of RCPB,have been explored.The results indicate that the effect of SNF on RCPB performance is related to the SNF dosage,lime-to-sand ratio,and SC.The slump of fresh RCPB with 0.1wt%-0.5wt%SNF increased by 2.6%-26.2%,whereas the yield stress reduced by 4.1%-50.3%,indicating better workability and improved cohesiveness of the mix.The bleeding rate of fresh RCPB decreased first and then rose with the increase of SNF dosage,and the peak decrease was 67.67%.UCS of RCPB first increased and then decreased with the increase of SNF dosage.At the optimal SNF addition ratio of 0.3wt%,the UCS of RCPB curing for 7,14 and,28 d ages increased by 31.5%,28.4%,and 29.5%,respectively.The beneficial effects of SNF in enhancing the early UCS of RCPB have been corroborated.However,the later UCS increases at a slower rate.The research findings may guide the design and preparation of RCPB with adequate performance for practical applications. 展开更多
关键词 rod milling sand sulfonated naphthalene formaldehyde condensate cemented paste backfill rheological properties physicomechanical properties
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Promotion of Ni/MCM-41 Catalyst for Hydrogenation of Naphthalene by co-Impregnation with Polyols
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作者 仇松柏 翁育靖 +3 位作者 李玉萍 马龙隆 张琦 王铁军 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2014年第4期433-438,J0001,共7页
The activities of nickel supported on MCM-41 catalysts, prepared by co-impregnation with polyols (ethylene glycol, glycerol, xylitol, sorbitol and glucose), were investigated by hydrogenation of naphthalene. Compare... The activities of nickel supported on MCM-41 catalysts, prepared by co-impregnation with polyols (ethylene glycol, glycerol, xylitol, sorbitol and glucose), were investigated by hydrogenation of naphthalene. Compared with the conventional wetness impregnation, addition of moderate polyols into the metal nitrate support surface, resulting in formation of persion of the active phase and significant aqueous solution could enhance interaction with very small NiO particle size (〈5 nm), high discatalytic activity. Particle size of Ni^0 decreased from 36.1 nm to below 5 nm; meanwhile the complete hydrogenation of naphthalene was dependent on the Ni^0 particle size. The hydrogenation activities of the catalysts prepared by co-impregnation with polyols were very high with 100% conversion even at iow temperature of 55 ℃. 展开更多
关键词 Ni/MCM-41 co-Impregnation naphthalene hydrogenation POLYOLS
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Treatment of naphthalene derivatives with iron-carbon micro-electrolysis 被引量:20
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作者 王玉萍 王连军 +1 位作者 彭盘英 陆天虹 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2006年第6期1442-1447,共6页
The degradation of five naphthalene derivatives in the simulated wastewater was investigated using the iron-carbon micro-electrolysis method.The optimal initial pH of solution and adsorption of iron-carbon and removal... The degradation of five naphthalene derivatives in the simulated wastewater was investigated using the iron-carbon micro-electrolysis method.The optimal initial pH of solution and adsorption of iron-carbon and removal efficiency of the total organic carbon(TOC)were investigated.The results show that the removal efficiency of the naphthalene derivatives can reach 48.9%?92.6% and the removal efficiency of TOC is 42.8%?78.0% for the simulated wastewater with 200 mg/L naphthalene derivatives at optimal pH of 2.0?2.5 after 120 min treatment.The degradation of five naphthalene derivatives with the micro-electrolysis shows the apparent first-order kinetics and the order of removal efficiency of the naphthalene derivatives is sodium 2-naphthalenesulfonate,2-naphthol,2,7-dihydroxynaphthalene,1-naphthamine,1-naphthol-8-sulfonic acid in turn.It is illustrated that the substituents of the naphthalene ring can affect the removal efficiency of naphthalene due to their electron-withdrawing or electron-donating ability. 展开更多
关键词 cast iron SCRAP MICRO-ELECTROLYSIS naphthalene SUBSTITUENT WASTEWATER TREATMENT
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Effects of temperature and surfactants on naphthalene and phenanthrene sorption by soil 被引量:15
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作者 ZHANG Jinghuan ZENG Jianhui HE Mengchang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2009年第5期667-674,共8页
Adsorption experiments were carried out to investigate the sorption behaviors of naphthalene and phenanthrene in six different soils and to determine the effects of temperature, linear alkylbenzene sulfonate (LAS) a... Adsorption experiments were carried out to investigate the sorption behaviors of naphthalene and phenanthrene in six different soils and to determine the effects of temperature, linear alkylbenzene sulfonate (LAS) and cetylrimethyl ammonium bromide (CTAB) on sorption. The results show that for a given sorbent phenanthrene exhibited greater nonlinear and stronger sorption than naphthalene. There was a strong negative correlation for the Koc values with organic carbon content (foc). The increase of temperature was not favorable to sorption. Sorption decreased along with the increasing aqueous LAS concentration from 0 to 1000 mg/L. At low CTAB concentration (〈 100 mg/L), the adsorption increased as CTAB hemimicelles formed on the soil surface. At high concentration, CTAB decreased the adsorption by occupying active hydrophobic adsorption sites and solubilization of naphthalene and phenanthrene. 展开更多
关键词 naphthalene PHENANTHRENE SORPTION SOIL TEMPERATURE linear alkylbenzene sulfonate cetylrimethyl ammonium bromide
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Effect of Competitive Adsorption between Sodium Tripolyphosphate and Naphthalene Superplasticizer on Fluidity of Cement Paste 被引量:7
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作者 谭洪波 MA Baoguo +2 位作者 LI Xiangguo JIAN Shouwei YANG Hu 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2014年第2期334-340,共7页
The adsorption amount, ξ-potential of cement particles and fluidity of cement paste were tested to research the competitive adsorption between naphthalene superplasticizer (FDN) and STPP. The experimental results s... The adsorption amount, ξ-potential of cement particles and fluidity of cement paste were tested to research the competitive adsorption between naphthalene superplasticizer (FDN) and STPP. The experimental results showed that the presence of STPP could significantly improve the fluidity of cement paste and reduce the fluidity loss with FDN. There existed a competitive adsorption between STPP and FDN. STPP and calcium ions formed complexes; they preferentially adsorbed onto surface of cement particles and preempt adsorption points of FDN; and it reduced adsorption amount of FDN. In the absence of STPP, saturation adsorption amount of FDN was 5.93 mg/g; but when the dosage of STPP was 0.1%, it reduced to 4.3 mg/g (about 72.5%). The adsorption amount of FDN was reduced by STPP, but ξ-potential of cement particles enhanced and fluidity of cement paste increased because of strong negative charge effect of the complexes. Adsorption of the complexes would delay Ca^2+ into liquid and inhibit formation of active adsorption points. Then, content of FDN in liquid increased with the addition of STPP and ξ-potential of cement particles became stable. In this way, fluidity loss of cement paste reduced. 展开更多
关键词 sodium tripolyphosphate naphthalene superplasticizer ξ-potential COMPLEX competitive adsorption
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甘蔗割手密种转录因子NAP亚家族的鉴定及SsNAP2a参与叶片衰老的功能分析 被引量:1
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作者 王恒波 冯春燕 +4 位作者 张以星 谢婉婕 杜翠翠 吴明星 张积森 《作物学报》 CAS CSCD 北大核心 2024年第1期110-125,共16页
NAP(NAC-like,activated by apetala3/pistillata)是转录因子NAC基因家族中一类参与调控植物生长发育、叶片衰老及响应激素和非生物胁迫应答的亚家族。本研究利用甘蔗割手密种基因组数据和生物信息学方法,首先,基于比较基因组学对NAP亚... NAP(NAC-like,activated by apetala3/pistillata)是转录因子NAC基因家族中一类参与调控植物生长发育、叶片衰老及响应激素和非生物胁迫应答的亚家族。本研究利用甘蔗割手密种基因组数据和生物信息学方法,首先,基于比较基因组学对NAP亚家族成员进行鉴定、系统进化分析、保守结构域及顺式调控元件预测;其次,克隆获得割手密种SsNAP2的等位基因SsNAP2a,分析该基因在不同生长发育阶段的表达及其在激素和非生物胁迫下的表达特征;最后,利用瞬时表达和亚细胞定位分析SsNAP2a基因的功能。结果表明,在割手密种基因组中共鉴定5个NAP亚家族成员,亚细胞定位预测所有成员编码蛋白均定位于细胞核上,这些基因的Ka/Ks比值均小于1,表明纯化选择在演化中起到关键作用。系统聚类分析表明,5个代表性的被子植物(拟南芥、菠萝、水稻、玉米和高粱)与已报道的12个物种及甘蔗的NAP亚家族成员,共计46个,分为4个Clade,其演化的顺序Clade I>Clade II>Clade III>Clade IV。此外,在SsNAP亚家族成员的启动子区域预测到较多响应脱落酸和茉莉酸、低温等逆境胁迫的顺式作用元件,推测其参与多种激素和非生物胁迫相关应答通路。进一步,从割手密种SES208中克隆到SsNAP2a基因,该cDNA全长序列1173 bp(GenBank登录号为OQ335094),编码390个氨基酸残基,其与等位基因SsNAP2编码蛋白的序列相似性为97.70%,有10个氨基酸残基的差异,表明同源8倍体的割手密种等位基因序列差异较大。qRT-PCR分析表明,SsNAP2a基因在割手密种不同生长发育阶段中组成型表达,尤其在衰老的蔗皮和根中的表达量最高;在乙烯利(ethylene,ET)、脱落酸(abscisic acid,ABA)、4℃低温和40℃高温处理下,其表达量呈现显著诱导表达;而在8%聚乙二醇(polyethyleneglycol,PEG)胁迫下显著下调表达。亚细胞定位表明,SsNAP2a融合蛋白定位在细胞核上。瞬时过表达SsNAP2a基因7 d后,本氏烟(Nicotianabenthamiana)叶片有明显的卷曲、皱缩等衰老现象,ET合成相关基因(NtEFE26,NtAccdeaminase)显著上调表达,而水杨酸、茉莉酸和ABA合成相关基因(NtPR-1a/c、NtPR3和NtAREB1)显著下调表达,表明SsNAP2a基因参与多种激素信号传导途径诱发叶片衰老。以上研究结果为挖掘甘蔗NAP亚家族基因成员参与叶片衰老的生物学功能奠定了研究基础,也为培育甘蔗抗衰老分子育种提供候选的基因资源。 展开更多
关键词 割手密种 nap基因 叶片衰老 激素胁迫 基因功能 甘蔗
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Study on the Novel Dicyanate Ester Resin Containing Naphthalene Unit 被引量:4
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作者 HongQiangYAN HongYunPENCG LiJI GuoRongQI 《Chinese Chemical Letters》 SCIE CAS CSCD 2004年第9期1050-1052,共3页
The novel dicyanate ester resin containing naphthalene unit (DNCY) was synthesized, and characterized by FT-IR, 1H-NMR, 13C-NMR and elemental analysis (EA). The thermal properties of DNCY resin was studied by thermal... The novel dicyanate ester resin containing naphthalene unit (DNCY) was synthesized, and characterized by FT-IR, 1H-NMR, 13C-NMR and elemental analysis (EA). The thermal properties of DNCY resin was studied by thermal degradation analysis at a heating rate of 10 C /min-1 in N2 and air. The DNCY resin exhibited better thermal and thermal-oxidative stability than bisphenol A dicyanate (BACY) resin. 展开更多
关键词 naphthalene unit dicyanate ester resin SYNTHESIS thermal properties.
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Interlayer Energy Transfer from Naphthalene to Anthracene Chromophores Organized in Langmuir-Blodgett Films 被引量:3
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作者 LiQianLI ChiMingCHE 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第1期49-52,共4页
Interlayer energy transfer between 2, 3-naphtho-10-hexadecylaza-15-crown-5 (NC16) and N-[1-(9-methoxyanthryl)]decylaza-15-crown-5 (A10C) within multilayer Langmuir-Blodgett films has been studied by steady-state fluor... Interlayer energy transfer between 2, 3-naphtho-10-hexadecylaza-15-crown-5 (NC16) and N-[1-(9-methoxyanthryl)]decylaza-15-crown-5 (A10C) within multilayer Langmuir-Blodgett films has been studied by steady-state fluorescence spectra. The donor and acceptor could be separated precisely by inserting stearic acid (SA) spacers. The efficiency of the energy transfer increases with the decrease in the donor-acceptor distance by a quadratic manner, suggesting the donor excitations are delocalized in the layer. 展开更多
关键词 Energy transfer L-B film naphthalene anthracene.
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Study on the Reaction Mechanism of Naphthalene with Oxalyl Chloride 被引量:3
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作者 Wu Lin Qin Yi-min +4 位作者 Huang Bo Zong Zhi-ming Wei Xian-yong Chen Qing-ru Zou Guo-lin 《Wuhan University Journal of Natural Sciences》 EI CAS 2001年第4期854-858,共5页
The reaction of naphthalene with oxalyl chloride in the presence of anhydrous AlCl3 was investigated. The homolog of dinaphthyl methanone can be obtained mainly from this reaction. Naphthalene conversion does not have... The reaction of naphthalene with oxalyl chloride in the presence of anhydrous AlCl3 was investigated. The homolog of dinaphthyl methanone can be obtained mainly from this reaction. Naphthalene conversion does not have evident correlation with the amount of AlCl3. The results show that the reaction proceeds via carbon cation electrophilic substitution reaction-free radical substitution reaction pathway. 展开更多
关键词 naphthalene oxalyl chloride carboncation free radical reaction mechanism
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Synthesis and Thermal Crosslinking Behavior of Poly(aryl ether ketone)s Containing 1,4-Naphthalene Moieties 被引量:3
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作者 NIUYa-ming ZHANGYun-he CHENXing-bo WANGGui-bin JIANGZhen-hua 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2005年第1期109-113,共5页
A new monomer, 1,4-bis(4-fluorobenzoyl) naphthalene(compound 2) was synthesized via a two-step reaction. 1,4-Naphthalenedicarboxylic acid chloride(compound 1) was prepared by using the acyl chlorization reaction of 1,... A new monomer, 1,4-bis(4-fluorobenzoyl) naphthalene(compound 2) was synthesized via a two-step reaction. 1,4-Naphthalenedicarboxylic acid chloride(compound 1) was prepared by using the acyl chlorization reaction of 1,4-naphthalenedicarboxylic acid with thionyl chloride. The Friedel-Crafts acylation of compound 1 with fluorobenzene afforded compound 2 in a 80% yield. The polycondensation of compound 2 with various bisphenols in tetramethylene sulfone(TMS) in the presence of excess potassium carbonate as a condensation reagent was carried out at 210 ℃ to quantitatively afford the corresponding poly(aryl ether ketone)s(compounds 3_8) containing 1,4-naphthalene moieties. Thermal analyses showed that the polymers have T g values ranging from 496 to 500 K and are thermally stable in air with initial mass loss above 500 ℃. These novel polymers exhibited an excellent solubility in organic solvents including NMP, DMAc, and chloroform, etc. In addition, the glass transition temperatures of these polymers increased and the polymers became insoluble in chloroform after treated at 260 ℃, indicating the occurrence of a thermal crosslinking reaction. 展开更多
关键词 Poly(aryl ether ketone) naphthalene derivatives Friedel-Crafts acylation Thermal crosslinking properties
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Selective catalytic hydrogenation of naphthalene to tetralin over a NiMo/Al2O3 catalyst 被引量:9
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作者 Xiaoping Su Pu An +7 位作者 Junwen Gao RuchengWang Yujuan Zhang Xi Li Yangkun Zhao Yongqi Liu Xiaoxun Ma Ming Sun 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2020年第10期2566-2576,共11页
The selective catalytic hydrogenation of naphthalene to high-value tetralin was systematically investigated.A series of Al2O3 catalysts containing different active metals(Co,Mo,Ni,W)were prepared by incipient wetness ... The selective catalytic hydrogenation of naphthalene to high-value tetralin was systematically investigated.A series of Al2O3 catalysts containing different active metals(Co,Mo,Ni,W)were prepared by incipient wetness impregnation.The effects of different active metals forms(oxidation,reduction,sulfuration)and reaction conditions on naphthalene hydrogenation were investigated and the catalysts were characterized by XRD,XPS,BET,NH3-TPD and SEM.Especially,Ni-Mo/Al2O3 was first used in this reactive system.The results show that the oxidative4%Ni O-20%MoO3/Al2O3 is the best catalyst for the preparation of tetralin.The conversion of naphthalene and the selectivity of tetralin can reach 95.62%and 99.75%respectively at 200℃,8 h and 6 MPa.Compared with reduced and sulfureted 4%Ni O-20%MoO3/Al2O3 catalysts,oxidative 4%Ni O-20%MoO3/Al2O3 has a well dispersed and uniform monolayer of the active metals,larger pore volume and size,and larger total acidity.NiO-MoO3/Al2O3 has a synergistic effect between NiO activity and MoO3 selectivity. 展开更多
关键词 naphthalene TETRALIN Ni-Mo/Al2O3 catalysts
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Synthesis of 2-Isopropyl Naphthalene Catalyzed by Et_3NHCl-AlCl_3 Ionic Liquids 被引量:2
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作者 Li Chenmin Qi Xin Tang Xiangyang 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2014年第1期60-65,共6页
In this paper, 2-isopropyl naphthalene has been synthesized by the reaction of naphthalene and isopropyl bromide, using triethylamine hydrochloride-aluminum chloride ionic liquid as the catalyst. The effect of the cat... In this paper, 2-isopropyl naphthalene has been synthesized by the reaction of naphthalene and isopropyl bromide, using triethylamine hydrochloride-aluminum chloride ionic liquid as the catalyst. The effect of the catalyst composition, the reaction time, the reaction temperature, the ionic liquid dosage, as well as the molar ratio of the reagents on the 2-isopropyl naphthalene yield was systematically investigated. The optimal reaction conditions cover: an AlCl3 to Et3NHCl ratio of 2.0, a reaction time of 3 h, a reaction temperature of 15.0 ℃, a volume fraction of ionic liquid to the mixture(isopropyl bromide, n-dodecane and n-hexane) of 9%, and a naphthalene/isopropyl bromide molar ratio of 4.0. Under the optimal reaction conditions, the conversion of isopropyl bromide reached 98% and the selectivity of 2-isopropyl naphthalene was equal to 80%. The test results verified good catalytic activity upon using Et3NHCl-AlCl3 ionic liquid as the catalyst for alkylation of naphthalene with isopropyl bromide. The activity of the ionic liquid remains unchanged after it has been recycled for 4 times. 展开更多
关键词 ionic liquid naphthalene isopropyl bromide ALKYLATION
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Alkyl Naphthalenes and Phenanthrenes:Molecular Markers for Tracing Filling Pathways of Light Oil and Condensate Reservoirs 被引量:2
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作者 LI Meijun WANG Tieguan +4 位作者 LIU Ju ZHANG Meizhu LU Hong MA Qinglin GAO Lihui 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2010年第5期1294-1305,共12页
Condensates and light oils are generally characterized by high maturity, low concentration of sterane and terpane biomarkers and low content of non-hydrocarbon fraction. As a result, some commonly-used sterane, terpan... Condensates and light oils are generally characterized by high maturity, low concentration of sterane and terpane biomarkers and low content of non-hydrocarbon fraction. As a result, some commonly-used sterane, terpane and carbazole migration parameters in conventional oil reservoirs may have a certain limitation in condensate and light oil reservoirs for their poor signal-noise ratios in the gas chromatography-mass spectrometry (GC-MS). Naphthalene, phenanthrene and their methylated substituents, however, are present in significant concentrations in condensates and light oils. Taking the Fushan depression (in the Beibuwan Basin, Northern South China Sea) as an example, this paper attempts for the first time to use polycyclic aromatic hydrocarbon (PAH)-related parameters to trace migration directions and filling pathways for condensate and light oil reservoirs. The result shows that TMNr (i.e. 1, 3, 7-TMN/(1, 3, 7-TMN + 1, 2, 5-TMN), TMN: trimethylnaphthalene)), MPI-1 (i.e. 1.5×(2-MP + 3-MP)/(P + 1-MP + 9-MP), P: phenanthrene MP: methyiphenanthrene), MN/DMN (∑methylnaphthalene/∑dimethylnaphthalene, %) and MN/TMN (∑nethylnaphthalene/∑trimethylna- phthalene, %) can be used to trace the filling pathways of condensate and light oil reservoirs. These parameters, together with geological consideration and other bulk oil properties (e.g. the gas to oil ratio and density), suggest that the condensates and light oils in the Huachang oil and gas field are mainly sourced from the Bailian sag that is located to the northeast of the Huachang uplift in the Fushan depression. 展开更多
关键词 CONDENSATE light oil polycyclic aromatic hydrocarbon (PAH) naphthalene phenanthrene migration filling pathway Fushan depression
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Catalytic Synthesis of Hexyl-naphthalene over H-type Zeolites 被引量:1
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作者 WEI Chang-ping SUN Xiao-fei +1 位作者 JIANG Xin-hua ZHEN Kai-ji 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2005年第6期684-686,共3页
H-type zeolites( HY, Hβ, and HM) were synthesized and characterized by XRD, NH3-TPD, and Py-IR. Selectively catalytic alkylation of naphthalene with n-hexanol to hexyl-naphthalene over the zeolites was carried out.... H-type zeolites( HY, Hβ, and HM) were synthesized and characterized by XRD, NH3-TPD, and Py-IR. Selectively catalytic alkylation of naphthalene with n-hexanol to hexyl-naphthalene over the zeolites was carried out. The experimental results show that the catalytic activities of the zeolites are mainly determined by their acid properties and pore structures. The larger the pore diameter is, the higher the catalytic activity is. NH3-TPD profiles show that Hβ and HM have lower acid strengths than HY. HY has both the highest activity and highest selectivity for the hexylnaphthalene. Higher reaction temperatures and longer reaction time are beneficial to the production of β-hexyl-naphthalene over the HY zeolite. 展开更多
关键词 H-type zeolites naphthalene N-HEXANOL Hexylnaphthalene ALKYLATION
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Protective Effect of Coleus aromaticus Benth(Lamiaceae)against Naphthalene-induced Hepatotoxicity 被引量:1
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作者 K.VIJAYAVEL C.ANBUSELVAM B.ASHOKKUMAR 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2013年第4期295-302,共8页
Objective To investigate protective effect of Coleus aromaticus leaf extract against naphthalene induced hepatotoxicity in rats. Methods Eighteen male rats were divided into three groups. Group I rats were treated as ... Objective To investigate protective effect of Coleus aromaticus leaf extract against naphthalene induced hepatotoxicity in rats. Methods Eighteen male rats were divided into three groups. Group I rats were treated as control. Group II rats were intraperitoneally administered with naphthalene (435 mg/kg b.wt) dissolved in corn oil once a day for a period of 30 days. Group III rats were treated with leaf extract (100 mg/kg b.wt) dissolved in 0.9% saline and naphthalene (435 mg/kg b.wt) dissolved in corn oil once a day for a period of 30 days. Results Significant protective effect was observed against naphthalene induced liver damage, which appeared evident from the response levels of marker enzymes (aspartate transaminase, alanine transaminase, acid phosphatase, alkaline phosphatase and lactate dehydrogenase). The biochemical components viz. triglycerides, free fatty acids, cholesterol acyl transferase, high-density lipoprotein, low-density lipoprotein, cholesterol and bilirubin were found to be increased in liver and serum of naphthalene stressed rats when compared to control. Conclusion Treatment of naphthalene intoxicated rats with plant extract reversed these distorted parameters to near normal levels. Liver histology showed supportive evidence regarding the protective nature of plant extract against fatty changes induced by naphthalene. The present study provides a scientific rationale for using C. aromaticus in the management of liver disorders. 展开更多
关键词 Coleus aromaticu HEPATOPROTECTION naphthalene HEPATOTOXICITY HISTOPATHOLOGY
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Catalytic performance of Cu-and Zr-modified beta zeolite catalysts in the methylation of 2-methylnaphthalene 被引量:8
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作者 Fatih Gülec Farooq Sher Ali Karaduman 《Petroleum Science》 SCIE CAS CSCD 2019年第1期161-172,共12页
2,6-Dimethylnaphthalene(2,6-DMN) is a commercially important chemical for the production of polyethylenenaphthalate and polybutylene naphthalate. However, its complex synthesis procedure and high production cost signi... 2,6-Dimethylnaphthalene(2,6-DMN) is a commercially important chemical for the production of polyethylenenaphthalate and polybutylene naphthalate. However, its complex synthesis procedure and high production cost significantly reduce the use of 2,6-DMN. In this study, the synthesis of 2,6-DMN was investigated with methylation of 2-methylnaphthalene(2-MN) over metal-loaded beta zeolite catalysts including beta zeolite, Cu-impregnated beta zeolite and Zr-impregnated beta zeolite. The experiments were performed in a fixed-bed reactor at atmospheric pressure under a nitrogen atmosphere. The reactor was operated at a temperature range of 400–500 °C and varying weight hourly space velocity between 1 and 3 h^(-1).The results demonstrated that 2,6-DMN can be synthesized by methylation of 2-MN over beta type zeolite catalysts.Besides 2,6-DMN, the product stream also contained other DMN isomers such as 2,7-DMN, 1,3-DMN, 1,2-DMN and 2,3-DMN. The activity and selectivity of beta zeolite catalyst were remarkably enhanced by Zr impregnation, whereas Cu modification of beta zeolite catalyst had an insignificant effect on its selectivity. The highest conversion of 2-MN reached81%, the highest ratio of 2,6-DMN/2,7-DMN reached 2.6 and the highest selectivity of 2,6-DMN was found to be 20% by using Zr-modified beta zeolite catalyst. 展开更多
关键词 METHYLATION naphthalene derivatives Polyethylenenaphthalate 2 6-Dimethylnaphthalene and beta zeolite catalyst
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Naphthalene-containing polyimides:Synthesis, characterization and photovoltaic properties of novel donor-acceptor dyes used in solar cell 被引量:1
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作者 牛海军 穆景山 +4 位作者 张密林 罗俊 罗培辉 白续铎 王文 《中国有色金属学会会刊:英文版》 CSCD 2009年第S3期587-593,共7页
Novel linear and star branched triphenylamine-containing aromatic imides were designed and synthesized by the condensation between amine-substituted triphenylamine and naphthalene-1, 4, 5, 8-tetra-carboxylic dianhydri... Novel linear and star branched triphenylamine-containing aromatic imides were designed and synthesized by the condensation between amine-substituted triphenylamine and naphthalene-1, 4, 5, 8-tetra-carboxylic dianhydride in order to investigate the influence of topological structure on the photophysical performance. The polyimides were characterized by elementary analysis and FTIR measurements. Thermogravimetric analysis (TGA) shows that the onset temperatures of decomposition (Td) for 5% mass loss range from 371 to 445 ℃. UV-Vis spectrum, quantum chemical calculation and cyclic voltammetry (CV) were used to obtain the dependence of energy levels on the function of structures. The introduction of triphenylamine group changes the energy level of the entire dye system. The dye-sensitized solar cells (DSSCs) prepared by using the dyes have a strong photoelectric current response in visible light region of 400-600 nm. 展开更多
关键词 naphthalene DIIMIDE triphenylamine sensitized solar cell electrochemical properties
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Improved Stability and Shape Selectivity of 2,6-Dimethylnaphthalene by Methylation of Naphthalene with Methanol on Modified Zeolites 被引量:5
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作者 Ye Zhang Junpeng Feng +1 位作者 Zhanjun Lyu Xuekuan Li 《Modern Research in Catalysis》 2014年第2期19-25,共7页
2,6-Dimethylnaphthalene (2,6-DMN) is a key intermediate for polyethylene naphthalate synthesis. The selective synthesis of 2,6-DMN from naphthalene and methanol was carried out over different zeolites (HZSM-5, Hβ, HU... 2,6-Dimethylnaphthalene (2,6-DMN) is a key intermediate for polyethylene naphthalate synthesis. The selective synthesis of 2,6-DMN from naphthalene and methanol was carried out over different zeolites (HZSM-5, Hβ, HUSY and SAPO-11) modified by 0.1wt% PdO under atmospheric pressure. Among the adopted zeolites, SAPO-11 exhibits exceptional shape-selectivity and stability to synthesize 2,6-dimethylnaphthalene from methylation of naphthalene, due to the special pore structure of SAPO-11 which inosculated better with 2,6-dimethylnaphthalene than with 2,7-dimethylnaphthalene. 展开更多
关键词 naphthalene METHYLATION 2 6-Dimethylnaphthalene Shape-Selective STABILITY PDO Modified Zeolites
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Toxicity of Naphthalene on Caenorhabditis elegans 被引量:1
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作者 ZHANG Shu-hua XU Jing-bo +3 位作者 LIU Cheng-bai LI Qiao GUAN Shu-wen WANG Le-ping 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2011年第3期468-473,共6页
Naphthalene is a common environmental contaminant substance. The toxic effects of naphthalene on Caenorhabditis elegans were investigated at the molecular, biochemical and physiological levels. To assess the molecular... Naphthalene is a common environmental contaminant substance. The toxic effects of naphthalene on Caenorhabditis elegans were investigated at the molecular, biochemical and physiological levels. To assess the molecular-level effect, stress-related gene expression was investigated such as those of hsp-16.1, sod-3, ctl-2, cep-1, cyp35a2, ugt-44, gst-1 and dhs-28. Cell apoptosis was assessed at the biochemical level. Life span, locomotion behaviors and brood size were investigated at the physiological level. The results indicate that naphthalene exposure could not only induce the expression of stress-related genes such as hsp16.1, sod-3, ctl-2 and cep-1 but also reduce the life span of Caenorhabditis elegans. At the same time, naphthalene exposure could result in cell apoptosis and interfere in the locomotion behaviors of Caenorhabditis elegans. These data suggest that naphthalene has multiple toxicity on Caenorhabditis elegans. 展开更多
关键词 naphthalene Caenorhabditis elegans TOXICITY Real-time polymerase chain reaction(RT-PCR)
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