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Phase Regulation and Defect Passivation Enabled by Phosphoryl Chloride Molecules for Efficient Quasi‑2D Perovskite Light‑Emitting Diodes 被引量:1
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作者 Mingliang Li Yaping Zhao +10 位作者 Jia Guo Xiangqian Qin Qin Zhang Chengbo Tian Peng Xu Yuqing Li Wanjia Tian Xiaojia Zheng Guichuan Xing Wen‑Hua Zhang Zhanhua Wei 《Nano-Micro Letters》 SCIE EI CAS CSCD 2023年第8期181-191,共11页
Quasi-2D perovskites have attracted tremendous interest for application as lightemission layers in light-emitting diodes(LEDs).However,the heterogeneous n phase and non-uniform distribution still severely limit the fu... Quasi-2D perovskites have attracted tremendous interest for application as lightemission layers in light-emitting diodes(LEDs).However,the heterogeneous n phase and non-uniform distribution still severely limit the further development of quasi-2D perovskite LEDs(Pero-LEDs).Meanwhile,the increased defect density caused by the reduced dimension and grain size induces non-radiative recombination and further deteriorates the device performance.Here,we found that a series of molecules containing phosphoryl chloride functional groups have noticeable enhancement effects on the device performance of quasi-2D Pero-LEDs.Then,we studied the modification mechanism by focusing on the bis(2-oxo-3-oxazolidinyl)phosphinic chloride(BOPCl).It is concluded that the BOPCl can not only regulate the phase distribution by decreasing the crystallization rate but also remain in the grain boundaries and passivate the defects.As a result,the corresponding quasi-2D Pero-LEDs obtained a maximum external quantum efficiency(EQE_(max))of 20.82%and an average EQE(EQE_(ave))of around 20%on the optimal 50 devices,proving excellent reproducibility.Our work provides a new selection of molecular types for regulating the crystallization and passivating the defects of quasi-2D perovskite films. 展开更多
关键词 Quasi-2D perovskite Phosphoryl chloride functional group Crystallization control n phase control PASSIVATIOn
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N⁃苯基马来酰亚胺共聚物的合成及对PVC树脂耐热改性效果研究
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作者 孙芳芳 宋运运 《中国塑料》 CAS CSCD 北大核心 2024年第7期49-54,共6页
通过种子乳液聚合结合半连续加料方式,成功聚合出分子结构一致且与聚氯乙烯(PVC)树脂具有良好相容性的聚(N‐苯基马来酰亚胺‐苯乙烯‐丙烯腈)(PNSA)共聚物胶乳,将其与PVC树脂直接复合制备PNSA/PVC复合材料,并对PNAS耐热改性的效果进行... 通过种子乳液聚合结合半连续加料方式,成功聚合出分子结构一致且与聚氯乙烯(PVC)树脂具有良好相容性的聚(N‐苯基马来酰亚胺‐苯乙烯‐丙烯腈)(PNSA)共聚物胶乳,将其与PVC树脂直接复合制备PNSA/PVC复合材料,并对PNAS耐热改性的效果进行评价。结果表明,PNSA纳米胶乳颗粒粒径在155.3~251.5 nm之间,粒径分布均一;PNSA共聚物分子组成呈无规结构,分子结构一致,差示扫描量热曲线呈现单一的玻璃化转变温度(T_(g)),且与PVC树脂具有极佳的相容性;PNSA含量由0升高至50%(质量比,下同)时,复合材料的T_(g)由84.8℃提高到107.2℃,提高了22.4℃,维卡软化温度由71.2℃提高到91.9℃,提高了20.7℃;除耐热性改善以外,复合材料的力学性能也有一定程度的提高,本文的研究有利于PVC应用领域的进一步拓展。 展开更多
关键词 聚氯乙烯 n‐苯基马来酰亚胺 自由基共聚 种子乳液 耐热改性
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Nitrogen doped carbon catalyzing acetylene conversion to vinyl chloride 被引量:11
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作者 Xingyun Li Xiulian Pan Xinhe Bao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2014年第2期131-135,共5页
Commercial production of vinyl chloride from acetylene relies on the use of HgCla as the catalyst, which has caused severe environmental problem and threats to human health because of its toxicity. Therefore, it is vi... Commercial production of vinyl chloride from acetylene relies on the use of HgCla as the catalyst, which has caused severe environmental problem and threats to human health because of its toxicity. Therefore, it is vital to explore alternative catalysts without mercury. We report here that N-doped carbon can catalyze directly transformation of acetylene to vinyl chloride. Particularly, N-doped high surface area mesoporous carbon exhibits a rather high activity with the acetylene conversion reaching 77% and vinyl chloride selectivity above 98% at a space velocity of 1.0 mL.min-l.g-1 and 200 ~C. It delivers a stable performa℃nce within a test period of 100h and no obvious deactivation is observed, demonstrating potentials to substitute the notoriously toxic mercuric chloride catalyst. 展开更多
关键词 ACETYLEnE HYDROCHLORInATIOn vinyl chloride MERCURY-FREE n doped carbon
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阳离子型聚N-羟甲基丙烯酰胺水凝胶的制备及其对废水中甲基橙的吸附性能研究
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作者 从金月 黄超群 +3 位作者 贾伟娜 刘冰 王璇 于良民 《现代化工》 CAS CSCD 北大核心 2024年第S01期257-263,共7页
采用水溶液聚合法制备了阳离子型聚N-羟甲基丙烯酰胺水凝胶(CPNMA),并对其吸附废水中甲基橙(MO)的性能进行探究。利用SEM、FT-IR、TG及XPS对CPNMA进行表征。通过吸附动力学和吸附等温线模型拟合发现,在25℃下CPNMA对MO的吸附行为更符合... 采用水溶液聚合法制备了阳离子型聚N-羟甲基丙烯酰胺水凝胶(CPNMA),并对其吸附废水中甲基橙(MO)的性能进行探究。利用SEM、FT-IR、TG及XPS对CPNMA进行表征。通过吸附动力学和吸附等温线模型拟合发现,在25℃下CPNMA对MO的吸附行为更符合拟二级动力学和Langmuir等温吸附模型,吸附平衡时间为960 min,理论最大吸附量为371.6 mg/g。分析了吸附温度和溶液pH对吸附效果的影响,结果表明,在吸附温度为35℃及溶液pH=6时CPNMA可以呈现出最佳的吸附效果。综合分析,CPNMA的吸附机理包括氢键、静电作用、范德华力、n-π相互作用、表面吸附和孔隙填充。 展开更多
关键词 n-羟甲基丙烯酰胺 二甲基二烯丙基氯化铵 水凝胶 甲基橙 吸附
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Amelioration of Saline Soil by the Application of Gypsum, Calcium Chloride, Rice Husk and Cow Dung 被引量:1
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作者 Mohammad Zulfikar Khan Mohammad Golam Azom +5 位作者 Mohammad Tipu Sultan Sudipta Mandal Mohammad Ariful Islam Rikta Khatun Shaikh Motasim Billah Abu Hena Mohammad Zulfikar Ali 《Journal of Agricultural Chemistry and Environment》 2019年第2期78-91,共14页
A pot experiment was conducted to investigate the effect of cow dung, rice husks, calcium chloride and gypsum on soil reclamation and compare the effect of organic and inorganic amendments on soil reclamation during t... A pot experiment was conducted to investigate the effect of cow dung, rice husks, calcium chloride and gypsum on soil reclamation and compare the effect of organic and inorganic amendments on soil reclamation during the period of 5th March to 20th April, 2017. The experiment was laid to fit a completely randomized design (CRD) with seven treatments [Reference soil (T0), Cow dung (T1), Rice husk (T2), Gypsum (T3), Calcium chloride (T4), Cow dung + Rice husk (T5) and Gypsum + Calcium chloride (T6)] each having three replications for this experiment. After incubation (45 days), the laboratory investigation was carried out in the Soil, Water and Environment Discipline, Khulna University, Khulna, Bangladesh. Results indicate that the individual or combined effect of gypsum (T3) was more effective in changing EC and SAR. Gypsum application in combination with calcium chloride (T6) improved the soil chemical properties by reducing the EC. Among the treatment, calcium chloride (T4) had a remarkable effect in reducing sodium adsorption ratio and gypsum had a remarkable effect in reducing pH. Cow dung (T1), rice husk (T2), combination of cow dung and rice husk (T5) were less effective to reduce EC, pH and SAR. It’s measured for soils of different soil amendments varied significantly 展开更多
关键词 AMELIORATIOn SALInE Soil COW DUnG Rice Husk GYPSUM Calcium chloride C/n Ratio
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三聚氯氰催化N-苯基马来酰亚胺的合成
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作者 黄文楚 张海侠 +2 位作者 李林博 刘志鑫 张开旭 《广东化工》 CAS 2024年第11期35-37,共3页
本文对N-苯基马来酰亚胺(N-PMI)的合成工艺进行创新。以顺丁烯二酸酐和苯胺为原料,分别在乙酸乙酯、甲苯和氯苯中合成N-苯基马来酰胺酸(N-PMA);再以三聚氯氰和三乙胺为催化剂,在不同溶剂中制备N-PMI。改进后的工艺操作较为简单、所需原... 本文对N-苯基马来酰亚胺(N-PMI)的合成工艺进行创新。以顺丁烯二酸酐和苯胺为原料,分别在乙酸乙酯、甲苯和氯苯中合成N-苯基马来酰胺酸(N-PMA);再以三聚氯氰和三乙胺为催化剂,在不同溶剂中制备N-PMI。改进后的工艺操作较为简单、所需原料试剂易得,为N-PMI的合成提供了一种新思路。 展开更多
关键词 n-PMA n-PMI 合成 三聚氯氰 工艺创新
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A Novel 2D Architecture from Bismuth and Flexible Ligand N,N'-Diacetic Acid Imidazolium Chloride
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作者 柴小川 张汉辉 +5 位作者 张帅 雷然 陈义平 孙燕琼 孙瑞卿 杨齐愉 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2009年第11期1343-1348,共6页
A new compound {[Bi(trans-DAM)(cis-DAM)(H2O)]NO3·H2O}n 1 derived from bismuth and the flexible ligand N,N'-diacetic acid imidazolium chloride (H2DAMCl) was obtained by hydrothermal synthesis and characte... A new compound {[Bi(trans-DAM)(cis-DAM)(H2O)]NO3·H2O}n 1 derived from bismuth and the flexible ligand N,N'-diacetic acid imidazolium chloride (H2DAMCl) was obtained by hydrothermal synthesis and characterized by single-crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic P21/c space group with a = 9.2298(18), b = 13.339(3), c = 17.090(3) , β = 105.38(2)°, V = 2028.7(7)A^3, Z = 4, C14H18N5O13Bi, Mr = 673.31, Dc = 2.204 g/cm^3, F(000) = 1296, μ = 8.772 mm-1, the final R = 0.0472 and wR = 0.1441 for 4129 observed reflections (I 〉 2σ(I)). In 1, the carboxylic groups from DAM- ligands adopt a cheating mode to link bismuth ions to form a 2D sheet network. These sheets are further connected by hydrogen bonding interactions to give an interesting 3D supramolecular framework. 2D correlation analysis of IR of 1 with thermal and magnetic perturbation was introduced to ascertain the characteristic adsorption of the groups overlapped in the 1D IR spectrum. Additionally, compound 1 exhibits fluorescent emission at room temperature. 展开更多
关键词 n n'-diacetic acid imidazolium chloride BISMUTH crystal structure 2D correlation analysis of IR
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Synthesis and Characterization of Phenyl Camellia oleifera Seed Oil Ester Plasticizing PVC
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作者 Wenqing Xiao Yuhang Liu +2 位作者 Yuxin He Qiaoguang Li Yongquan Li 《Journal of Renewable Materials》 EI CAS 2024年第3期615-628,共14页
Plasticizers are essential additives in the processing of polyvinyl chloride(PVC),with phthalate plasticizers being widely used.However,these conventional plasticizers have been shown to be harmful to human health and... Plasticizers are essential additives in the processing of polyvinyl chloride(PVC),with phthalate plasticizers being widely used.However,these conventional plasticizers have been shown to be harmful to human health and environmentally unfriendly,necessitating the exploration of eco-friendly bio-based alternatives.In this study,Camellia oleifera seed oil,a specialty resource in China,was utilized as a raw material and reacted with 4,4′-Methylenebis(N,N-diglycidylaniline)(AG-80)to synthesize Phenyl Camellia seed Oil Ester(PCSOE).PCSOE was employed as a plasticizer to prepare modified PVC films with varying concentrations,with the conventional plasticizer dioctyl phthalate(DOP)serving as a control.Experimental results demonstrate that PSCOE-plasticized PVC films exhibit enhanced hydrophilicity,tensile strength,and thermal stability compared to DOP-modified PVC films.The contact angle of PSCOE-plasticized PVC films ranges from 66.26°to 78.48°,which is generally lower than the contact angle of DOP-modified PVC films at 78.40°,indicating improved hydrophilicity due to the modification with PCSOE.The tensile strength of PSCOE-plasticized PVC films ranges from 17.73 to 20.17 MPa,all surpassing the value of 16.41 MPa for DOP-modified PVC films.Moreover,the temperatures corresponding to 5%,10%,and 50%weight loss for PVC samples modified with PCSOE are higher than those for DOP.Hence,PCSOE presents a viable alternative to DOP as a plasticizer for PVC materials. 展开更多
关键词 Polyvinyl chloride(PVC) Camellia oleifera seed oil 4 4′-Methylenebis(n n-diglycidylaniline) bio-based plasticizer
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POLYMERIZATION OF N,N'-(PYROMELLITOYL)-BIS-L-LEUCINE DIACID CHLORIDE WITH HYDANTOIN DERIVATIVES BY MICROWAVE IRRADIATION
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作者 Khalil Faghihi 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2004年第4期343-348,共6页
Facile and rapid polycondensation reactions of N,N'-(pyromellitoyl)-bis-L-leucine diacid chloride 1 with eight different derivatives of hydantoin compounds 2a-h were developed by using a domestic microwave oven in... Facile and rapid polycondensation reactions of N,N'-(pyromellitoyl)-bis-L-leucine diacid chloride 1 with eight different derivatives of hydantoin compounds 2a-h were developed by using a domestic microwave oven in the presence of a small amount of polar organic medium such as o-cresol. The polycondensation reactions proceeded rapidly, compared with the conventional solution polycondensation, and was completed within 7-10 min, producing a series of novel optically active poly(amide-imide)s 3a-h with high yield and inherent viscosity of 0.35-0.65 dL/g. All of the above polymers were fully characterized by FT-IR, elemental analyses, inherent viscosity (η inh ), solubility test and specific rotation. Some structural characterization and physical properties of these optically active poly(amide-imide)s are reported. 展开更多
关键词 Microwave-assisted rapid polycondensation Optically active polymers Poly(amide-imide)s Hydantoin derivatives n n'-(Pyromellitoyl)-bis-L-leucine diacid chloride
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IR, 1H NMR, Electronic Properties and Conductivity Studies of N1 ,N4-Bis(Diphme)Benzene-l,4-Diamine Chloride Zirconium (IV) [{(Ar)2NC6H5N(Ar)2}ZrCl4] (Ar = C6H5)
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作者 Salem Et. Ashoor 《Journal of Chemistry and Chemical Engineering》 2011年第3期259-263,共5页
A range of new compounds such as N1,N4-bis(diphenylmethlene)benzene-l,4-diamine zirconium (IV) chloride [{(Ar)2NC6HsN(Ar)z}ZrCl4] (Ar = C6H5) complex counting the chelating amine and chloride in position tra... A range of new compounds such as N1,N4-bis(diphenylmethlene)benzene-l,4-diamine zirconium (IV) chloride [{(Ar)2NC6HsN(Ar)z}ZrCl4] (Ar = C6H5) complex counting the chelating amine and chloride in position trans have been prepared. Well-defined NI,N4-bis(diphenylmethlene)benzene-l,4-diamine zirconium (IV) chloride [{(Ar)2NC6H5N(Ar)2}ZrCl4] (Ar = C6H5) was obtained by stoichiometric addition of {(Ar)2NC6H5N(Ar)2} (Ar = C6H5) and {ZrC14} in ethanol at reflex temperature. IR, 1H NMR, electronic properties using hyperchem program study has been improved for this compound such as bond distance, and this compound was also defined as electric conductivity which proves to be useful for conductively compound. 展开更多
关键词 Electronic conductivity nI n4-bis(diphme)benzene-1 4-diamine n1 n4-bis(diphenylmethlene)benzene-1 4-diaminezirconium (IV) chloride.
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N-甲基-N-芳基丙烯酰胺的合成研究
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作者 周希 《浙江化工》 CAS 2024年第5期13-19,共7页
目的:研究一种高效合成N-甲基-N-芳基丙烯酰胺的方法。方法:2-甲基丙烯酰氯与含各种取代基的芳香胺发生亲核加成反应生成相应的丙烯酰胺,丙烯酰胺在氢化钠存在下与碘甲烷发生取代反应生成N-甲基-N-芳基丙烯酰胺。结果:以中等到良好的产... 目的:研究一种高效合成N-甲基-N-芳基丙烯酰胺的方法。方法:2-甲基丙烯酰氯与含各种取代基的芳香胺发生亲核加成反应生成相应的丙烯酰胺,丙烯酰胺在氢化钠存在下与碘甲烷发生取代反应生成N-甲基-N-芳基丙烯酰胺。结果:以中等到良好的产率合成了一系列含各种不同取代基的N-甲基-N-芳基丙烯酰胺。结论:该方法操作简单,产率较高,底物适用范围广。 展开更多
关键词 光氧化还原 亲核加成 芳香胺 丙烯酰氯 n-甲基-n-芳基丙烯酰胺
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EXTRACTION OF Zn AND Cd FROM CHLORIDE LIQUORS BY TRI-n-BUTYL PHOSPHATE
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《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1991年第7期1-7,共7页
Studies have been made on the extraction of Zn and Cd by TBP(tri-n-butyl phosphate) from diluent hydrochloric acid solutions of soldium chloride.The experiments show that the species extracted from diluent HCI solutio... Studies have been made on the extraction of Zn and Cd by TBP(tri-n-butyl phosphate) from diluent hydrochloric acid solutions of soldium chloride.The experiments show that the species extracted from diluent HCI solutions of NaCl appear to be predominantly ZnCl_2· 2TBP and CdCl_2·2TBP.For Cd,at lower acidities,anionic complexes of the type H_2CdCl_3 are also extracted.As the acidity is increased,H_2CdCl_4 appear to be predominant complexes in organic phase.For Zn,the acidocomplexes of the type HZnCl_3 appear in organ- ic phase after the acidity of solutions reaching a certain value([HCl]>0.1 mol/L). Furthermore,the ultraviolet absorption spectra of both aqueous and organic phases have been studied,and the infrared spectra of the organic phases have been exomined.The extraction mechanism and temperature effect are also discussed. 展开更多
关键词 EXTRACTIOn solvent extraction Zn CD tri-n-butyl phosphate zinc chloride
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Liquid Chromatography Detertmination of Amino Acids by Pre-Column Fluorescence Derivatization with Acridone-N-acetyl Chloride
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作者 Jin Mao YOU Xin Jun FAN +1 位作者 Qing Yu OU Qing Cun ZHU (Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences 730000)(Department of Chemistry, Qufu Normal University, Qufu, Shandong 273165) 《Chinese Chemical Letters》 SCIE CAS CSCD 1998年第7期657-660,共4页
A sensitive liquid chromatographic mcthod for the detection of andno acids with precolumn fluorescence derivatization with acridone-N-acetyl chloride has been developed. Andno acid derivatives were eluted in 4o ndn wi... A sensitive liquid chromatographic mcthod for the detection of andno acids with precolumn fluorescence derivatization with acridone-N-acetyl chloride has been developed. Andno acid derivatives were eluted in 4o ndn with good reproducibility. The reIative standard deviations (n=6) at an analytical concentration of 50 pmol are < 4%. The method described is also suitable for the analysis of andno acids in different biological samples. 展开更多
关键词 Liquid chromatography Acridone-n-acetyl chloride Amino acids Derivatization
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N-2-羟丙基三甲基氯化铵壳聚糖-茶多酚防龋齿漱口液的制备及评价
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作者 巩晓晨 阮奇城 +2 位作者 高远 张春晶 赵凯 《黑龙江大学自然科学学报》 2023年第5期565-572,共8页
制备一种以N-2-羟丙基三甲基氯化铵壳聚糖(N-2-hydroxypropyl trimethyl ammonium chloride chitosan,N-2-HACC)为主要成分、对致龋菌—变异链球菌(Streptococcus mutans,S.mutans)生长有抑制作用的新型漱口液。从10种具有抑菌活性的天... 制备一种以N-2-羟丙基三甲基氯化铵壳聚糖(N-2-hydroxypropyl trimethyl ammonium chloride chitosan,N-2-HACC)为主要成分、对致龋菌—变异链球菌(Streptococcus mutans,S.mutans)生长有抑制作用的新型漱口液。从10种具有抑菌活性的天然产物中筛选出抑菌效果最佳的物质,确定新型漱口液的最优组成成分,通过细胞毒性试验、生物相容性试验、急性毒性试验和口腔黏膜刺激试验评价漱口液的生物安全性。确定抑菌效果最优的天然产物为N-2-HACC和茶多酚,N-2-HACC和茶多酚的最低抑菌浓度分别为0.625和0.750 mg·mL^(-1)。以N-2-HACC和茶多酚为主要成分,制备了一种新型漱口液,漱口液中含1.2 mg·mL^(-1)N-2-HACC和1.0 mg·mL^(-1)茶多酚。该漱口液能够抑制S.mutans的生长,无细胞毒性,具有良好的安全性和血液相容性,溶血率符合要求。 展开更多
关键词 漱口液 n-2-HACC 茶多酚 变异链球菌 安全性
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N-甲基咪唑络合氯化银的合成及其抗菌性能研究
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作者 张子奥 杨柳 +3 位作者 李晴 闻诗雨 石彬 余磊 《安徽化工》 CAS 2023年第3期80-82,86,共4页
研究了银离子和N-甲基咪唑的特殊络合行为,对银和N-甲基咪唑的络合过程进行定量分析,发现并制备了新型银离子络合物,该新型银离子络合物对卤素稳定,同时研究了该新型银离子络合物的抗菌性能。结果表明,大肠杆菌和酵母菌在氮甲基咪唑络... 研究了银离子和N-甲基咪唑的特殊络合行为,对银和N-甲基咪唑的络合过程进行定量分析,发现并制备了新型银离子络合物,该新型银离子络合物对卤素稳定,同时研究了该新型银离子络合物的抗菌性能。结果表明,大肠杆菌和酵母菌在氮甲基咪唑络合银离子的影响下形成了明显的抑菌圈,可见氮甲基咪唑络合银离子的抗菌效果良好。 展开更多
关键词 n-甲基咪唑 氯化银 络合 抗菌
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PPTA回收溶剂NMP中PPD残留量的测定
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作者 陈建梅 苏凤仙 《合成纤维工业》 CAS 2023年第6期91-95,共5页
采用反相高效液相色谱法测定聚对苯二甲酰对苯二胺(PPTA)回收溶剂N-甲基吡咯烷酮(NMP)中对苯二甲酰氯与对苯二胺(PPD)的残留量,探讨了高效液相色谱仪的色谱条件,并研究了分析方法的精密度、准确度、检出限。结果表明:采用反相高效液相... 采用反相高效液相色谱法测定聚对苯二甲酰对苯二胺(PPTA)回收溶剂N-甲基吡咯烷酮(NMP)中对苯二甲酰氯与对苯二胺(PPD)的残留量,探讨了高效液相色谱仪的色谱条件,并研究了分析方法的精密度、准确度、检出限。结果表明:采用反相高效液相色谱法测定回收溶剂NMP中PPD的含量,适宜的色谱条件为色谱柱采用十八烷基硅烷键合硅胶柱,流动相中水/改性剂(体积比为991)与乙腈体积比为955,紫外波长为280 nm,进样量为10μL;该分析方法精密度优、重复性好、线性方程的相关性好,相对标准偏差为0.85%,加标回收率为98.1%~101.1%,检出限为0.35μg/g,能满足PPTA回收溶剂NMP中微量PPD含量的测定需求。 展开更多
关键词 聚对苯二甲酰对苯二胺 n-甲基吡咯烷酮 对苯二甲酰氯 对苯二胺 反相高效液相色谱法 测定
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三聚氯氰与N,N—二烷基荒氨酸钠盐的取代反应研究 被引量:5
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作者 李久盛 詹威强 +2 位作者 饶文琦 任天辉 王大璞 《有机化学》 SCIE CAS CSCD 北大核心 2001年第10期759-762,共4页
采用不同烷基的N,N-二烷基荒氨酸钠盐与三聚氯氰进行取代反应,合成了四个新化合物,产物结构经元素分析,IR,MS和1H NMR表征.实验结果表明,反应得到的不完全是预想的三嗪的三荒氨酸取代产物,而是具有三种不同结构的产物,并对这一反应可能... 采用不同烷基的N,N-二烷基荒氨酸钠盐与三聚氯氰进行取代反应,合成了四个新化合物,产物结构经元素分析,IR,MS和1H NMR表征.实验结果表明,反应得到的不完全是预想的三嗪的三荒氨酸取代产物,而是具有三种不同结构的产物,并对这一反应可能的机理进行了讨论. 展开更多
关键词 三聚氯氰 荒氨酸 取代反应 n n-二烷基荒氨酸钠盐 衍生物 润滑油添加剂
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氯乙烯/N-苯基马来酰亚胺共聚物组成控制和优化 被引量:9
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作者 杜淼 翁志学 +2 位作者 单国荣 黄志明 潘祖仁 《高分子学报》 SCIE CAS CSCD 北大核心 2000年第3期292-296,共5页
研究了氯乙烯 /N 苯基马来酰亚胺 (VC/PMI)共聚物组成随转化率的变化 ,体系中共聚物的累积组成偏差小于 0 0 5或 0 1的单体配比范围很小 ,采用加入第三单体丙烯腈 (AN)的方法进行改善 ,并以PMI在共聚物中的累积组成偏差作为控制参数 ... 研究了氯乙烯 /N 苯基马来酰亚胺 (VC/PMI)共聚物组成随转化率的变化 ,体系中共聚物的累积组成偏差小于 0 0 5或 0 1的单体配比范围很小 ,采用加入第三单体丙烯腈 (AN)的方法进行改善 ,并以PMI在共聚物中的累积组成偏差作为控制参数 ,得到了PMI在共聚物中的累积组成偏差小于 0 0 5和 0 1的VC/PMIlAN较优的配比范围 .结合悬浮聚合工艺的特点 ,确定了VC/PMI/AN悬浮共聚的最佳单体配比范围为f1=0 72~ 0 84 ,f2 =0 0 2~ 0 0 4 ,f3 =0 1 2~ 0 2 4 . 展开更多
关键词 氯乙烯 n-苯基马来酰亚胺 共聚物 组成 PVC
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氯乙烯/N-苯基马来酰亚胺悬浮共聚合速率的研究 被引量:9
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作者 杜淼 翁志学 +2 位作者 单国荣 黄志明 潘祖仁 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 1999年第2期304-308,共5页
考察了单体配比、温度、引发剂浓度诸因素对氯乙烯(VC)/N-苯基马来酰亚胺(PMI)悬浮共聚速率的影响.VC/PMI共聚有显著的交叉终止,致使共聚速率降低,测得交叉终止速率常数的函数=5.77,PMI均聚综合速率常... 考察了单体配比、温度、引发剂浓度诸因素对氯乙烯(VC)/N-苯基马来酰亚胺(PMI)悬浮共聚速率的影响.VC/PMI共聚有显著的交叉终止,致使共聚速率降低,测得交叉终止速率常数的函数=5.77,PMI均聚综合速率常数的倒数值δ2=53.65,共聚表观活化能Ea=127.9kJ/mol,增长活化能Ep=63.7kJ/mol,聚合速率对引发剂浓度的反应级数为0.786. 展开更多
关键词 氯乙烯 悬浮共聚 PMI 耐热 聚氯乙烯
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离子色谱法同时测定植物生长调节剂中氯化胆碱、甲哌鎓及N-甲基哌啶 被引量:10
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作者 朱作艺 张玉 +3 位作者 王君虹 李雪 王伟 孙彬 《浙江大学学报(理学版)》 CAS CSCD 北大核心 2019年第3期333-338,共6页
建立了一种离子色谱-抑制电导同时测定植物生长调节剂中主要活性成分氯化胆碱、甲哌鎓以及杂质N-甲基哌啶的快速检测方法。样品经稀释过膜后直接进样分析,采用阳离子交换色谱柱thermo scientific ionpac CG17 (50 mm×4 mm)+CS17 (2... 建立了一种离子色谱-抑制电导同时测定植物生长调节剂中主要活性成分氯化胆碱、甲哌鎓以及杂质N-甲基哌啶的快速检测方法。样品经稀释过膜后直接进样分析,采用阳离子交换色谱柱thermo scientific ionpac CG17 (50 mm×4 mm)+CS17 (250 mm×4 mm),以10 mmol·L^(-1)甲烷磺酸溶液等度淋洗,可在10 min内完成以上目标分析物的检测,且常规阳离子(Li^+、 Na^+、 NH_4^+、 K^+、 Mg^(2+)和Ca^(2+))不会干扰对3种化合物的测定。在优化后的最佳色谱条件下,氯化胆碱的线性范围为0.1~500 mg·L^(-1),甲哌鎓的线性范围为0.5~500mg·L-1,N-甲基哌啶的线性范围为0.4~200 mg·L^(-1),3种化合物线性相关系数(r)均大于0.999 4,线性关系良好。3种目标分析物的检出限(信噪比S/N=3)为28.0~112.5μg·L^(-1),定量限(信噪比S/N=10)为93.5~375.0μg·L^(-1),峰面积的相对标准偏差(RSD, n=6)均小于0.47%,表明方法具有较好的重现性。该检测方法简单方便,已成功应用于商品化植物生长调节剂中3种成分质量浓度的测定,实际样品加标回收率为96.0%~103.6%。可应用于相关植物生长调节剂原料及成品的质量控制。 展开更多
关键词 氯化胆碱 甲哌鎓 n-甲基哌啶 离子色谱 植物生长调节剂
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