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Fe(II)改性蒙脱石对土壤汞的吸附固定机理探究
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作者 周细霞 刘朝淑 孙荣国 《贵州师范大学学报(自然科学版)》 CAS 北大核心 2024年第4期63-74,共12页
为明确Fe-MMT对土壤汞离子(Hg^(2+))的吸附、解吸特性及潜在作用机理,采用FeSO_(4)·7H_(2)O改性钠基蒙脱土(Na-MMT),合成了Fe(II)基蒙脱石(Fe-MMT),并探究了不同pH值、吸附剂用量、Hg^(2+)初始浓度和反应时间等条件下,Fe-MMT对土壤... 为明确Fe-MMT对土壤汞离子(Hg^(2+))的吸附、解吸特性及潜在作用机理,采用FeSO_(4)·7H_(2)O改性钠基蒙脱土(Na-MMT),合成了Fe(II)基蒙脱石(Fe-MMT),并探究了不同pH值、吸附剂用量、Hg^(2+)初始浓度和反应时间等条件下,Fe-MMT对土壤Hg^(2+)的吸附解吸特性、吸附动力学和等温吸附模型。结果发现:在pH=5、吸附剂用量为0.5 g、Hg^(2+)初始浓度为170 mg/L、反应时间为0.5 h的条件下,Fe-MMT对土壤Hg^(2+)的去除率高达76.8%;Fe-MMT对Hg^(2+)+的吸附过程符合Langmuir等温吸附模型,伪二阶动力学模型可较好地拟合吸附动力学行为,表明该吸附过程主要为单分子层吸附,且主要发生在吸附剂表面的均相反应位点上;结合微观结构表征,发现Fe-MMT对土壤Hg^(2+)的吸附主要通过-S^(2-)、-SH和-OH与Hg^(2+)进行络合,以及Fe^(2+)与Hg^(2+)的原位共沉淀络合引起的;Fe-MMT在水-土混合体系中的解吸率为9.7%,表明Fe-MMT对土壤Hg^(2+)具有较强的固定作用。可见,Fe-MMT具有修复Hg污染土壤的潜力。 展开更多
关键词 吸附 水土混合 解吸 fe(ii)改性蒙脱石(fe-MMT)
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Effect of the Para-substituent of the Tridentate Pyridine-based Ru(II) Complex upon the Catalytic Activity in Transfer Hydrogenation 被引量:1
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作者 杨刚 秦冬玲 +1 位作者 高宏飞 徐南平 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第1期169-172,共4页
Three stable 4-substituted pyridine-based ruthenium(II)complexes[RuCl2(PPh3)L](L=4-R-2,6-bis (diethylaminomethylene)pyridine,R=Br,H or allyloxy)were synthesized.The catalytic activities of the complexes toward... Three stable 4-substituted pyridine-based ruthenium(II)complexes[RuCl2(PPh3)L](L=4-R-2,6-bis (diethylaminomethylene)pyridine,R=Br,H or allyloxy)were synthesized.The catalytic activities of the complexes toward transfer hydrogenation from alcohols to ketones were investigated.The electronic effects of the para-substituent in the pyridyl ring were probed and we found that the electron-donating group increased the catalytic activity.The result suggests that an electron-donating group is probably preferential for linking the catalytic ruthenium complex and the chemically inert supporting molecules such as a carbosilane dendrimer. 展开更多
关键词 ruthenium(iicomplexes TRIDENTATE transfer hydrogenation catalyst
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Preparation, Characterization and Antimicrobial Studies of Mn(II) and Fe(II) Complexes with Schiff Base Ligand Derived from 2-aminophenol and 3-formyl-2-hydroxy-6-methoxyquinoline 被引量:1
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作者 Abubakar Muhammad Jabbi Habu Nuhu Aliyu +1 位作者 Sulaiman Isyaku Abdullahi Muhammad Kabir 《Open Journal of Inorganic Chemistry》 2020年第2期15-24,共10页
Schiff base derived from 2-aminophenol and 3-formyl-2-hydroxy-6-methoxyquinoline and its Mn(II) and Fe(II) complexes were synthesized and characterized by melting point and decomposition temperature, elemental analysi... Schiff base derived from 2-aminophenol and 3-formyl-2-hydroxy-6-methoxyquinoline and its Mn(II) and Fe(II) complexes were synthesized and characterized by melting point and decomposition temperature, elemental analysis, molar conductivity, infrared (IR) spectral analysis, atomic absorption spectroscopy (AAS) analysis, solubility test, and magnetic susceptibility. The Fourier-transform infrared spectroscopy (FTIR) spectral data of the Schiff base determined showed <span><span style="font-family:Verdana;">a band at 1622 cm</span><sup><span style="font-family:Verdana;"><span style="white-space:nowrap;"><span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span></span>1</span></sup><span style="font-family:Verdana;"> and this was assigned to the </span><i><span style="font-family:Verdana;">v </span></i><span style="font-family:Verdana;">(C=N), which is a feature of azomethine group. The same band was observed to shift to lower frequencies 1577 and 1599 cm</span><sup><span style="font-family:Verdana;"><span style="white-space:nowrap;"><span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span></span>1</span></sup><span style="font-family:Verdana;"> in the complexes suggesting coordination of the Schiff base with the respective metal(II) ions. Molar conductan</span></span><span><span style="font-family:Verdana;">ce values 14.58 and 12.65 Ω</span><sup><span style="font-family:Verdana;"><span style="white-space:nowrap;"><span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span></span>1</span></sup><span style="font-family:Verdana;"><span style="white-space:nowrap;"><span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8729;</span></span></span>cm</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"><span style="white-space:nowrap;"><span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8729;</span></span></span>mol</span><sup><span style="font-family:Verdana;"><span style="white-space:nowrap;"><span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span></span>1</span></sup><span style="font-family:Verdana;"> show that the metal complexes were non-electrolyte in nature. The magnetic susceptibility of the complexes was determined and the gram magnetic susceptibility of the complexes was found to be positive, revealing that they are paramagnetic. The elemental analysis of the complexes for C, N and H determined suggested 1:1 metal to ligand ratio. The result of the antimicrobial studies showed that, the metal(II) complexes exhibited better antibacterial and antifungal activity than the Schiff base.</span></span> 展开更多
关键词 Metal(ii) complexes Schiff Base Antibacterial and Antifungal Studies
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Elimination, Kinetics and Thermodynamics of Fe(II) Ions by Adsorption in Static and Dynamic Conditions on Activated Carbons in Aqueous Media
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作者 Spenseur Bouassa Mougnala Charly Mve Mfoumou +5 位作者 Berthy Lionel Mbouiti Pradel Tonda-Mikiela Francis Ngoye Ferdinand Evoung Evoung Jean Aubin Ondo Guy Raymond Feuya Tchouya 《Journal of Geoscience and Environment Protection》 2024年第10期181-203,共23页
This work investigated the removal, kinetics and thermodynamics of iron(II) ions (Fe(II)) by adsorption in static and dynamic conditions in aqueous media on activated carbons (AC-i30min, AC-i1h, and AC-i24h), prepared... This work investigated the removal, kinetics and thermodynamics of iron(II) ions (Fe(II)) by adsorption in static and dynamic conditions in aqueous media on activated carbons (AC-i30min, AC-i1h, and AC-i24h), prepared from palm nut shells collected in the city of Franceville to Gabon, using potassium hydroxide (KOH) as the activating agent. Results on the elimination of Fe(II) in static and dynamic adsorption on prepared activated carbons (ACs) showed that the AC-i24h adsorbent has the best Fe(II) adsorption capacities at saturation (Qsat). The Qsat obtained on AC-i24h in static and dynamic conditions (17.87 and 10.38 mg/g, respectively) were higher than those of AC-i30min (13.89 and 5.54 mg/g respectively) and AC-i1h (14.92 and 8.64 mg/g respectively). Moreover, the static adsorption was more effective in the removal of Fe(II) ions in aqueous media in our experimental conditions. The percentage removal (%E) of Fe(II) obtained on prepared activated carbons in static conditions was better than those obtained in dynamic conditions, especially on AC-i24h, where the %E was 89.27% in static and 61.56% in dynamic. In kinetics, results showed that the pseudo-second-order kinetic model best described the adsorption mechanisms of Fe(II) on prepared activated carbons in static adsorption, with mainly of chemisorption on the solid surfaces. However, in dynamic conditions, the pseudo-first-order kinetic model was more suitable. In addition to the weak interactions between Fe(II) and the activated carbon surfaces, strong interactions (chemisorption) were also observed. Also, thermodynamic data obtained on AC-i24h in static adsorption indicated that the adsorption of Fe(II) was spontaneous and increased with temperature (ΔG˚ H˚ = 503.54 KJ/mol). 展开更多
关键词 Palm Nut Shells Activated Carbon Removal fe(ii) Static and Dynamic Adsorption KINETICS Thermodynamics
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Differential response of injured and healthy retinas to syngeneic and allogeneic transplantation of a clonal cell line of immortalized olfactory ensheathing glia:a double-edged sword
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作者 María Norte-Muñoz María Portela-Lomba +9 位作者 Paloma Sobrado-Calvo Diana Simón Johnny Di Pierdomenico Alejandro Gallego-Ortega Mar Pérez JoséMCabrera-Maqueda Javier Sierra Manuel Vidal-Sanz María Teresa Moreno-Flores Marta Agudo-Barriuso 《Neural Regeneration Research》 SCIE CAS 2025年第8期2395-2407,共13页
Olfactory ensheathing glia promote axonal regeneration in the mammalian central nervous system,including retinal ganglion cell axonal growth through the injured optic nerve.Still,it is unknown whether olfactory enshea... Olfactory ensheathing glia promote axonal regeneration in the mammalian central nervous system,including retinal ganglion cell axonal growth through the injured optic nerve.Still,it is unknown whether olfactory ensheathing glia also have neuroprotective properties.Olfactory ensheathing glia express brain-derived neurotrophic factor,one of the best neuroprotectants for axotomized retinal ganglion cells.Therefore,we aimed to investigate the neuroprotective capacity of olfactory ensheating glia after optic nerve crush.Olfactory ensheathing glia cells from an established rat immortalized clonal cell line,TEG3,were intravitreally injected in intact and axotomized retinas in syngeneic and allogeneic mode with or without microglial inhibition or immunosuppressive treatments.Anatomical and gene expression analyses were performed.Olfactory bulb-derived primary olfactory ensheathing glia and TEG3 express major histocompatibility complex classⅡmolecules.Allogeneically and syngenically transplanted TEG3 cells survived in the vitreous for up to 21 days,forming an epimembrane.In axotomized retinas,only the allogeneic TEG3 transplant rescued retinal ganglion cells at 7 days but not at 21 days.In these retinas,microglial anatomical activation was higher than after optic nerve crush alone.In intact retinas,both transplants activated microglial cells and caused retinal ganglion cell death at 21 days,a loss that was higher after allotransplantation,triggered by pyroptosis and partially rescued by microglial inhibition or immunosuppression.However,neuroprotection of axotomized retinal ganglion cells did not improve with these treatments.The different neuroprotective properties,different toxic effects,and different responses to microglial inhibitory treatments of olfactory ensheathing glia in the retina depending on the type of transplant highlight the importance of thorough preclinical studies to explore these variables. 展开更多
关键词 cell therapy immune recognition major histocompatibility complex class ii(MHCii) neuroprotection olfactory ensheathing glia retinal ganglion cells
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CRYSTAL STRUCTURE OF A 2D SHEET-LIKE μ-CYANIDO-OXAMIDATO BRIDGED Fe(III)-Cu(II) HETERNUCLEAR COMPLEX
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作者 Nei Fang Wu Zhong Ning CHEN Jun QIU and Wen Xia TANG (State Key Laboratory of Coordination Chemistry,Nanjing University, Manjing 210093)Jing Ling WANG and Fang Ming NIAO(Department of Chemistry, Tianjin Normal University, Tianjin 300074) 《Chinese Chemical Letters》 SCIE CAS CSCD 1994年第8期713-714,共2页
The synthesis is and crystal structure are reported for the sheet-like compourd [CU2(oxpn)Fe(CN )5(NO)]. there oxpn is the dianion of M, M'-bis(3-aminopropyl)oxamide. This compound crustallizes in the orthogonal s... The synthesis is and crystal structure are reported for the sheet-like compourd [CU2(oxpn)Fe(CN )5(NO)]. there oxpn is the dianion of M, M'-bis(3-aminopropyl)oxamide. This compound crustallizes in the orthogonal space group Puma. with a=11 .413(4), b=22.242(5), c=7.736(2) A, and Z=4.The structure was refined to conventionat discrepancy factors R=0.047 and Pw=0.054. The Cu(II ) and Fe(III)centers are bridged by oxpn and cyanide, the formal behaves as a his-terdentate tigand bound to cooper(II)ion to form (II) dimers. whereas the latter bridges Cu(II) and Fe(III) centers in both symmetric and asymetric end- to-end bis-monodentate fashions, spreading out along be plane to form a 20 network. The Structure is made up of CuFe unit with Cu(II) and Fe(III) ions locating in a distorted square-based pyramid and a compressed octahedron, respectively. 展开更多
关键词 iiI OXAMIDATO complex CRYSTAL CYANIDO HETERNUCLEAR ii LIKE OF BRIDGED fe Cu
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Micellar Effect on Photoinduced Electron Transfer Reactions of Ruthenium(II) Polypyridyl Complexes with Quinones: Effect of CTAB
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作者 Thangadurai Sumitha Celin George Allen Gnana Raj 《Open Journal of Inorganic Chemistry》 2019年第1期1-10,共10页
Photoinduced electron transfer reaction between the excited state ruthenium (II) polypyridyl complexes and quinones has been investigated in cetyltrimethylammonium bromide using luminescent quenching techniques. The c... Photoinduced electron transfer reaction between the excited state ruthenium (II) polypyridyl complexes and quinones has been investigated in cetyltrimethylammonium bromide using luminescent quenching techniques. The complexes have the absorption and emission maximum in the range 452 - 468 nm and 594 - 617 nm respectively. The static nature of quenching is confirmed from the ground state absorption studies. The association constants for the complexes with quinones are calculated from the Benesi-Hildebrand plots using absorption spectral data. The value of quenching rate constant (kq) is highly sensitive to the nature of the ligand and the quencher, the medium, structure and size of the quenchers. Compared to the aqueous medium, the electron transfer rate is altered in CTAB medium. The oxidative nature of the quenching is confirmed by the formation of Ru3+ ion and quinone anion radical. 展开更多
关键词 QUENCHING Stern-Volmer Plot Static QUENCHING Ru(ii) POLYPYRIDYL complex
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FERROMAGNETICALLY COUPLED Gd(III)Cu(II)Gd(III)TRINUCLEAR COMPLEXES
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作者 Ming Ming MIAO Dai Zheng LIAO +1 位作者 Zone Hui JIANG and Geng Lin WANG (Department of Chemistry.Nankai University,Tianjin.300071) 《Chinese Chemical Letters》 SCIE CAS CSCD 1995年第6期533-536,共4页
Three new heterotrinuclear complexes have been synthesized and characterized, namely {[Gd(L)(2)](2)[Cu(pbaOH)]}(ClO4)(4), where pbaOH denotes 2-hydroxy-1,3-propylenebis(oxamato), L stands for 1,10-phenanthroline (phen... Three new heterotrinuclear complexes have been synthesized and characterized, namely {[Gd(L)(2)](2)[Cu(pbaOH)]}(ClO4)(4), where pbaOH denotes 2-hydroxy-1,3-propylenebis(oxamato), L stands for 1,10-phenanthroline (phen), 5-nitro-1,10-phenanthroline (NO2-phen) or 2,2'-bipyridyl (bpy). The temperature dependence of the magnetic susceptibility of ([Gd(phen)(2)(ClO4)](2)[Cu(pbaOH)])(ClO4)(2) has been studied in the 4-300K range, giving the exchange integral J = 6.69 cm(-1). This indicates a weak ferromagnetic interaction between the copper(II) and gadolinium(III) ions. 展开更多
关键词 ii)Gd iiI)TRINUCLEAR complexES CU
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低温下Fe(II)对Ferrihydrite相转化的催化作用研究 被引量:5
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作者 刘辉 魏雨 孙予罕 《化学学报》 SCIE CAS CSCD 北大核心 2005年第5期391-395,共5页
研究了在低温、近中性条件下,在微量Fe(II)离子存在下Ferrihydrite(又称为水合氧化铁hydrousironoxide)的相转化过程.结果表明,微量Fe(II)离子的存在不仅可以加速Ferrihydrite的相转化过程,而且其相转化产物的组成也与没有Fe(II)离子存... 研究了在低温、近中性条件下,在微量Fe(II)离子存在下Ferrihydrite(又称为水合氧化铁hydrousironoxide)的相转化过程.结果表明,微量Fe(II)离子的存在不仅可以加速Ferrihydrite的相转化过程,而且其相转化产物的组成也与没有Fe(II)离子存在时产物的组成有所不同,即除了α-FeOOH和α-Fe2O3外,还形成了γ-FeOOH;相转化过程既与阴离子的种类、反应温度、反应时间等因素有关,也与Fe(II)离子存在状态有关;Fe(II)离子通过催化Ferrihydrite的溶解过程,从而加速整个相转化过程.对该过程的深入研究将对认识和了解自然条件下铁氧化物的形成与相互转化具有重要意义. 展开更多
关键词 铁氧化物 ferrihydrite相转化工艺 催化作用 热力学 稳定性 晶化度 温度
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汞盐在Fe(III)-草酸盐络合物体系中的光化学还原研究 被引量:1
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作者 邓琳 林一歆 +1 位作者 吴峰 邓南圣 《水处理技术》 CAS CSCD 北大核心 2006年第5期8-10,共3页
进行了Fe(Ⅲ)-草酸盐配合物体系对含Hg(II)的模拟废水的光化学还原处理研究,当pH=5.0时,Hg(II)光化学还原效率最好。在实验选择的[Fe(Ⅲ)]和草酸盐浓度范围内,Fe(Ⅲ)和草酸盐浓度的增加能提高Hg(II)的光化学还原效率。CH3OH也能提高Hg(... 进行了Fe(Ⅲ)-草酸盐配合物体系对含Hg(II)的模拟废水的光化学还原处理研究,当pH=5.0时,Hg(II)光化学还原效率最好。在实验选择的[Fe(Ⅲ)]和草酸盐浓度范围内,Fe(Ⅲ)和草酸盐浓度的增加能提高Hg(II)的光化学还原效率。CH3OH也能提高Hg(II)的光化学还原效率。 展开更多
关键词 Hg(Ⅱ) HG fe(Ⅲ)-草酸盐络合物 光化学 还原
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氨基功能化纳米Fe_3O_4的制备及在痕量Pb(II)分析中的应用研究 被引量:2
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作者 唐祝兴 朱娜 陈寅 《沈阳理工大学学报》 CAS 2014年第1期28-31,44,共5页
采用一步法合成出氨基功能化Fe3O4纳米粒子,并借助XRD、FT-IR、等对产品进行表征。所制备的氨基化纳米Fe3O4材料粒径在100nm左右,大小分布均匀,分散性较好。提出一种新的方法,氨基化纳米Fe3O4分离富集与火焰原子吸收光谱法联用测定水样... 采用一步法合成出氨基功能化Fe3O4纳米粒子,并借助XRD、FT-IR、等对产品进行表征。所制备的氨基化纳米Fe3O4材料粒径在100nm左右,大小分布均匀,分散性较好。提出一种新的方法,氨基化纳米Fe3O4分离富集与火焰原子吸收光谱法联用测定水样中痕量Pb(II),考察该纳米材料对水溶液中痕量Pb(II)的分离富集性能。结果表明:在pH为7、T=303.15K的条件下,氨基化Fe3O4纳米材料对Pb(II)离子的吸附率可达98%。该方法的检出限(3σ)为0.17μg·mL-1(n=11),相对标准偏差(RSD)为2.02%(n=6)。 展开更多
关键词 氨基化fe3O4纳米粒子 火焰原子吸收光谱 分离富集 PB(ii)
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水杨醛缩三乙烯四胺Schiff碱Fe(III)配合物的合成、结构和光谱性质 被引量:3
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作者 李素悦 陈胜慧 +2 位作者 杜年军 徐剑峰 吴军永 《武汉科技学院学报》 2004年第1期61-65,共5页
合成水杨醛缩三乙烯四胺Schiff碱Fe(Ⅲ)配合物[(saltrien)Fe]Cl.2H2O。采用元素分析、红外光谱、电子光谱对其结构进行了表征,晶体结构通过X-射线衍射法测定。该化合物的化学计量式为:20H29ClFeN4O4,晶体属单斜晶系,其空间群为P21/c。... 合成水杨醛缩三乙烯四胺Schiff碱Fe(Ⅲ)配合物[(saltrien)Fe]Cl.2H2O。采用元素分析、红外光谱、电子光谱对其结构进行了表征,晶体结构通过X-射线衍射法测定。该化合物的化学计量式为:20H29ClFeN4O4,晶体属单斜晶系,其空间群为P21/c。晶胞参数:a = 18.517(4), b = 9.985(2), c = 12.035(2) , b = 103.43(2)o, V = 2164.3(7) 3, Z = 4, F(000) = 1008, r = 1.475 g/cm3, Mr = 480.77, m (MoKa) = 0.855 cm-1。结构偏离因子R1 = 0.0345, wR2 = 0.0469。共收集到4566个独立衍射点,其中I>2 (I)的可观测点为3730个。 展开更多
关键词 SCHIFF碱 铁配合物 合成 晶体结构 光谱性质
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Mn(II)-Fe(II)-MCF的制备及催化性能 被引量:1
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作者 孙宏 张泽 +1 位作者 宋裕卓 裴笠舟 《化学研究与应用》 CAS CSCD 北大核心 2022年第1期214-218,共5页
以改性玉米苞叶纤维为载体(MCF),负载Mn(II)和Fe(II)制备了Mn(II)-Fe(II)-MCF复合材料,催化H_(2)O_(2)氧化水中染料。通过傅立叶变换红外/近红外成像系统和扫描电子显微镜对其结构和形貌进行表征。实验结果表明:当染料浓度为10 mg·... 以改性玉米苞叶纤维为载体(MCF),负载Mn(II)和Fe(II)制备了Mn(II)-Fe(II)-MCF复合材料,催化H_(2)O_(2)氧化水中染料。通过傅立叶变换红外/近红外成像系统和扫描电子显微镜对其结构和形貌进行表征。实验结果表明:当染料浓度为10 mg·L^(-1),Mn(II)-Fe(II)-MCF用量为4 g·L^(-1),H_(2)O_(2)初始浓度为1.56 mmol·L^(-1),Mn(II)-Fe(II)-MCF对四种染料的催化效率明显不同。阳离子蓝X-GRRL(CBX-GRRL)降解效果最好,其次是甲基橙(MO)、次甲基蓝(MB)和罗丹明B(RhB)。对染料的氧化反应进行动力学分析,MO的降解反应为二级反应,CBX-GRRL、MB和RhB的降解反应均为一级反应。Mn(II)-Fe(II)-MCF适合催化氧化偶氮染料废水。 展开更多
关键词 Mn(ii)-fe(ii)-MCF复合材料 催化 玉米苞叶纤维 染料 类芬顿反应
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Interactions Between Anticancer Pt(II) complexes and Human Erythrocyte Spectrin *
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作者 杨晓改 李荣昌 《Journal of Chinese Pharmaceutical Sciences》 CAS 1998年第3期9-14,共6页
The interactions between human erythrocyte spectrin(SP) and Pt(II) complexes with different composition and configuration were studied by fluorescence and circular dichroism spectra. The results showed that there are ... The interactions between human erythrocyte spectrin(SP) and Pt(II) complexes with different composition and configuration were studied by fluorescence and circular dichroism spectra. The results showed that there are 4.7×10 2 binding sites of cisplatin(CDDP) in a spectrin tetramer(SPT). Among them, about 70 sites with apparent binding constant K 1】3.47×10 6 were of highest affinity, 1.8×10 2 sites with K 2 = 3.47×10 6 were of high affinity, and other 2.2×10 2 sites with K 3 = 8.77×10 5 were of low affinity. The conformation change of spectrin, depending on the concentration of Pt(II) complex and molar ratio(R) of Pt(II) complex to spectrin, was induced by the binding of Pt(II) complexes. It indicated that the interaction of both CDDP and cis diaquodiamine platinum(DADP) with SP followed a two step first order kinetic process in the first stage (1 h), and the kinetic constants were determined. In the second stage, the induced conformation change, polymerization and depolymerization of SP were probably involved. It was noticed that in the reaction of SP and Pt(II) complexes with 1,2 cyclohexanediammine isomers as chiral carrier ligand, stereo matching played a more important role than the affinity of Pt(II) to thiol groups of SP. 展开更多
关键词 Pt (ii) complex SPECTRIN CONFORMATION Binding sites Kinetic CHIRAL
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Preparation of Platinum(II) Complexes with 1-β-D-Ribofuranosyl-1,2,4-triazole-3-carboxamide and its Deoxy-analogue 被引量:7
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作者 Wen PEI Kobe JOZE 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第6期559-562,共4页
The platinum (II) complexes of the [Pt (N4,N7-Ribavirin) (DMSO) Cl], [Pt (N4,N7-De-oxyribavirin) (DMSO) Cl] were obtained by the reactions of cis-[Pt (DMSO)2 Cl2] and K[Pt (DMSO) Cl3] with 1-??-D-ribofuranosyl-1,2,4-t... The platinum (II) complexes of the [Pt (N4,N7-Ribavirin) (DMSO) Cl], [Pt (N4,N7-De-oxyribavirin) (DMSO) Cl] were obtained by the reactions of cis-[Pt (DMSO)2 Cl2] and K[Pt (DMSO) Cl3] with 1-??-D-ribofuranosyl-1,2,4-triazole-3-carboxamide (Ribavirin) and its deoxy-analogue (deoxyribavirin). The preparation of 1-(2'-deoxy-?-D-ribofuranosyl) -1,2,4-triazole-3-carboxamide was also performed through a four-step procedure, protection of 3', 5'-dihydroxyl group of Ribavirin with 1,3-dichloro-1,1,3,3-tetraisopropyldisiloxane (TPDS-Cl), phenoxythio-carbonylation of the 2'-hydroxyl group of 3', 5'-O-TPDS-Ribavirin with phenoxythiocarbonyl-chloride (PTC-Cl), reduction of 2′-O-phenoxythiocarbonyl ester of 3', 5'-O-TPDS-Ribavirin with tri-n-butyltin hydride and AIBN, deprotection of 3', 5'-O-TPDS-Ribavirin with tetrabutylammon-ium fluoride in THF. 展开更多
关键词 Platinum(ii) complexes ribavirin and deoxyribavirin nucleobase platination complexation reaction antitumor agents
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Synthesis, Structure and Physical Properties of a Barium(II) Complex with 5-Sulfoisophthalic Acid Sodium 被引量:9
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作者 吴刚 王小锋 +1 位作者 韦昊 刘振锋 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第8期1095-1100,共6页
An alkaline earth metal-organic framework [Ba(Hsip)(H2O)4]n (1, NaH2sip = 5-sulfoisophthalic acid sodium) has been constructed, and characterized by single-crystal X-ray diffraction. In complex 1, each Ba(II) ... An alkaline earth metal-organic framework [Ba(Hsip)(H2O)4]n (1, NaH2sip = 5-sulfoisophthalic acid sodium) has been constructed, and characterized by single-crystal X-ray diffraction. In complex 1, each Ba(II) atom coordinates to one ligand Hsip3- and four water molecules with a distorted nine-coordinated monocapped tetragonal antiprism geometry. Each Hsip2- anion acts as a μ3-bridging ligand, in which two carboxylate groups adopt the same bidentate chelating coordinating model and the sulfonate group takes a monodentate coordinating model, resulting in a wave-like two-dimensional network with a (6, 3) topological structure. The two-dimensional networks are further linked by O–H···O to form a three-dimensional structure. Luminescent property and thermal stability of complex 1 are investigated. 1 belongs to the orthorhombic system, space group Pna21 with a = 7.3333(2), b = 16.7044(3), c = 10.4817(2), Z = 4, V = 1283.99(5)3, Mr = 453.58, Dc = 2.346 g/cm3, F(000) = 880, μ = 3.314 mm–1, the final R = 0.0261 and wR = 0.0592 for 2425 observed reflections with I 2σ(I). 展开更多
关键词 Ba(ii complex sulfonate group carboxylate group luminescent property thermal stability
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Dioxygen Affinity and Catalytic Performance of Bis-(furaldehyde) Schiff Bases Co(II) Complexes in Cyclohexene Oxidation 被引量:4
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作者 Sun, B Chen, JR +1 位作者 Hu, JY Li, XJ 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第11期1043-1046,共4页
Oxygenation constants and thermodynamic parameters DeltaH degrees and DeltaS degrees of cobalt (II) complexes with bis-(furaldehyde) Schiff bases (1, 2, 3, 4)were obtained by mearsuring saturated dioxygen uptake of th... Oxygenation constants and thermodynamic parameters DeltaH degrees and DeltaS degrees of cobalt (II) complexes with bis-(furaldehyde) Schiff bases (1, 2, 3, 4)were obtained by mearsuring saturated dioxygen uptake of these complexes in pyridine at different temperature. These complexes could activate molecular oxygen and were used as catalysts in cyclohexene oxidation. The influence of ligand structure on the dioxygen affinity and catalytic activity of the complexes were discussed. 展开更多
关键词 Schiff base cobalt (ii) complex OXYGENATION catalytic oxidation CYCLOHEXENE
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Synthesis, Structure and Fluorescence of a Copper(II) Complex [Cu_2(bipy)_2(Hpht)_2Cl](Hpht)(bipy=2,2'-Bipyridine,H_2pht=o-Phthalic Acid) 被引量:4
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作者 李强 郑发鲲 +3 位作者 蔡丽珍 陈文通 郭国聪 黄锦顺 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2005年第3期354-358,共5页
The title complex [Cu2(bipy)2(Hpht)2Cl](Hpht) (bipy = 2,2?-bipyridine, H2pht = o-phthalic acid) has been synthesized in the NaOH aqueous solution of CuCl2, Gd(NO3)3, bipy and H2pht, and its crystal structure was det... The title complex [Cu2(bipy)2(Hpht)2Cl](Hpht) (bipy = 2,2?-bipyridine, H2pht = o-phthalic acid) has been synthesized in the NaOH aqueous solution of CuCl2, Gd(NO3)3, bipy and H2pht, and its crystal structure was determined by single-crystal X-ray diffraction method. It crys- tallizes in triclinic, space group P1, C44H31ClCu2N4O12, Mr = 970.26, a = 8.175(2), b = 16.254(4), c = 16.946(4) ?, α = 62.966(6), β = 84.833(8), γ = 84.348(8)°, V = 1993.4(8) ?3, Z = 2, Dc = 1.616 g/cm3, F(000) = 988 and μ = 1.207 mm-1. The final R = 0.0429 and wR = 0.0843 for 5682 observed reflections with I > 2σ(I). Each copper(II) atom displays a distorted square-pyramidal geometry with two nitrogen atoms of one chelate 2,2?-bipy molecule, two oxygen atoms from two different bridging carboxylate groups of Hpht- and one bridging chloride atom occupying the apical position. The two copper(II) atoms are connected by a μ2-Cl atom and two bridging Hpht- ligands in a syn-syn coordination mode to form an isolated dinuclear unit. The molecular structure is extended to a one-dimensional wavy chain through hydrogen bonds. The title complex exhibits blue fluorescent emission at 443 nm (λex = 372 nm) in the solid state at room temperature. 展开更多
关键词 copper(ii) complex crystal structure SYNTHESIS LUMINESCENCE
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Synthesis and Crystal Structure of a Zinc(II) Complex with 2-(4′-Chlorine-benzoyl)-benzoic Acid and 1,10-Phenanthroline 被引量:5
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作者 李秀梅 王庆伟 刘博 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第11期1646-1649,共4页
A new metal-organic complex Zn2(cbba)4(phen)2 (Hcbba = 2-(4'chlorine-ben- zoyl)benzoic acid, phen = 1,10-phenanthroline) 1 has been hydrothermally synthesized and structurally characterized by elemental analy... A new metal-organic complex Zn2(cbba)4(phen)2 (Hcbba = 2-(4'chlorine-ben- zoyl)benzoic acid, phen = 1,10-phenanthroline) 1 has been hydrothermally synthesized and structurally characterized by elemental analysis, IR, fluorescence spectrum and single-crystal X-ray diffraction. The compound crystallizes in orthorhombic, space group Pbcn with a = 12.0821(II), b = 18.3140(17), c = 30.961(3) A, V= 6850.7(11) A^3, C80H48C14N4O12Zn2, Mr= 1529.76, Dc = 1.483 g/cm^3,μ(MoKa) = 0.925 mm^-1, F(000) = 3120, Z = 4, the final R = 0.0559 and wR = 0.1146 for 3963 observed reflections (I〉 2σ(I)). In the crystal structure, the zinc atom is five-coordinated with three carboxylate oxygen atoms from three different cbba ligands and two nitrogen atoms from the phen ligand, showing a distorted square-pyramidal geometry. Furthermore, it exhibits a 3D supramolecular network through π-π interactions and shows yellow photoluminescent property at room temperature. 展开更多
关键词 hydrothermal synthesis crystal structure zinc(ii complex
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Synthesis, Crystal Structure and DNA Binding Studies of a Nickel(II) Complex with 2-Aminomethylbenzimidazole and Demethylcantharate 被引量:4
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作者 李士坤 林秋月 +2 位作者 吕天喜 王彦君 陈东 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2010年第11期1632-1637,共6页
A new mixed-ligand nickel(Ⅱ) complex, [Ni(L)(DCA)(H2O)]·2H2O (L = C8H9N3, 2-aminomethyl-benzimidazole, DCA2- = 7-oxabicyclo[2,2,1]heptane-2,3-dicarboxylate, demethylcantharate, C8H8O5), has been synthe... A new mixed-ligand nickel(Ⅱ) complex, [Ni(L)(DCA)(H2O)]·2H2O (L = C8H9N3, 2-aminomethyl-benzimidazole, DCA2- = 7-oxabicyclo[2,2,1]heptane-2,3-dicarboxylate, demethylcantharate, C8H8O5), has been synthesized and characterized. The structure of the complex was determined by single-crystal X-ray diffraction. It is of monoclinic system, space group P21/c with a = 7.7211(7), b = 12.0799(12), c = 19.7867(19), β = 100.390(6)°, V = 1815.2(3) nm3, Dc = 1.625 g·cm-3, Ζ = 4, F(000) = 928, R = 0.0314 and wR = 0.0822. In addition, the interaction between the complex and DNA was studied by means of fluorescence spectra and viscosity. The results indicate that the complex binds to DNA by the mode of partial intercalation with the Stern-Volmer constants Ksv of 3.81 × 104 mol·L-1. 展开更多
关键词 nickel(ii complex 2-aminomethylbenzimidazole demethylcantharidin interaction between DNA
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