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水热条件下配合物水解及可逆与不可逆反应 被引量:1
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作者 王玉荣 《矿物岩石地球化学通报》 CAS CSCD 1995年第3期158-159,共2页
水热条件下配合物水解及可逆与不可逆反应王玉荣(中国科学院广州地球化学研究所,广州510640)关键词配合物水解,可逆与不可逆,实验研究水解作用是水参与地球化学反应过程中最普遍最重要的化学反应过程。天然矿物大多是不可逆... 水热条件下配合物水解及可逆与不可逆反应王玉荣(中国科学院广州地球化学研究所,广州510640)关键词配合物水解,可逆与不可逆,实验研究水解作用是水参与地球化学反应过程中最普遍最重要的化学反应过程。天然矿物大多是不可逆反应的产物。红海海底现代沉积铁矿是... 展开更多
关键词 配合物水解 可逆与不可逆 实验研究
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Sn、Nb、Ta氟配合物高温水解不可逆反应实验研究 被引量:4
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作者 王玉荣 陈文华 张海祥 《地球化学》 CAS CSCD 北大核心 1995年第C00期183-190,共8页
用快速淬火高压釜测定了k2SnF6、K2NbOF5、K2TaF7在200-550℃、100MPa条件下的水解特征,并将上述溶液在500℃水解后,置于200-300℃、100MPa下进行不同时间返溶。实验测定表明,不同... 用快速淬火高压釜测定了k2SnF6、K2NbOF5、K2TaF7在200-550℃、100MPa条件下的水解特征,并将上述溶液在500℃水解后,置于200-300℃、100MPa下进行不同时间返溶。实验测定表明,不同元素配合物水解强弱及返溶的难易程度均有不同。温度愈低、酸度愈小及时间愈短愈不可逆。不可逆的原因是水解后产物陈化,形成难溶氧化物。作者认为配合物水解曲线可用来衡量水解不可逆的程度。 展开更多
关键词 快速淬火高压釜 元素地球化学 配合物水解 难溶氧化 不可逆反应实验 含氟矿
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Electro‑copolymerized film of ruthenium catalyst and redox mediator for electrocatalytic water oxidation
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作者 WANG Hao TANG Kun +2 位作者 SHAO Jiangyang WANG Kezhi ZHONG Yuwu 《无机化学学报》 SCIE CAS CSCD 北大核心 2024年第11期2193-2202,共10页
Electro-copolymerized film containing ruthenium complexes as electron-transfer(or redox)mediators and water-oxidation catalysts by an oxidative copolymerization method is presented.The addition of the redox mediator s... Electro-copolymerized film containing ruthenium complexes as electron-transfer(or redox)mediators and water-oxidation catalysts by an oxidative copolymerization method is presented.The addition of the redox mediator significantly improved the electrocatalytic water-oxidation activity and reduced the overpotential to 220 mV.The prepared electrode showed a water-oxidation catalytic rate constant kobs of 31.7 s^(-1)and an initial turnover frequency of 1.01 s^(-1)in 1000 s by potential electrolysis at 1.7 V applied bias vs NHE(normal hydrogen electrode).The kinetic isotope effect study suggests that the catalytic water oxidation reaction on the electrode surface occurs via a bimolecular coupling mechanism. 展开更多
关键词 water oxidation water splitting ruthenium complexes ELECTROPOLYMERIZATION ELECTROCATALYSIS
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混合三烷基氧膦的合成和组分分析 被引量:1
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作者 韩磊 王海荣 王建晨 《核化学与放射化学》 EI CAS CSCD 北大核心 2006年第3期169-173,共5页
采用烷基碘磷配合物水解法合成了混合三烷基氧膦,考察了不同原料配比对合成产品组分的影响和各产品的产率,并使用红外光谱法(IR)及气相色谱法(GC)对产品的组分和分布进行了分析和表征。研究结果表明,该合成方法简单可靠,且能通过调节原... 采用烷基碘磷配合物水解法合成了混合三烷基氧膦,考察了不同原料配比对合成产品组分的影响和各产品的产率,并使用红外光谱法(IR)及气相色谱法(GC)对产品的组分和分布进行了分析和表征。研究结果表明,该合成方法简单可靠,且能通过调节原料配比来得到期望组分的产品。 展开更多
关键词 三烷基氧膦 合成 烷基碘磷配合物水解 组分分析
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Hydrolysis Mechanism of the NAMI-A-type Antitumor Complex (HL)[trans-RuCl4L(dmso-S)] (L=1-methyl-l,2,4-triazole)
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作者 陈兰美 陈锦灿 +3 位作者 廖思燕 刘江琴 罗辉 郑康成 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2011年第4期383-390,I0003,共9页
The hydrolysis process of Ru(III) complex (HL)[trans-RuC14L(dmso-S)] (L=l-methyl-l,2,4- triazole and dmso-S=S-dimethyl sulfoxide) (1), a potential antitumor complex similar to the well-known antitumor agent ... The hydrolysis process of Ru(III) complex (HL)[trans-RuC14L(dmso-S)] (L=l-methyl-l,2,4- triazole and dmso-S=S-dimethyl sulfoxide) (1), a potential antitumor complex similar to the well-known antitumor agent (Him)[trans-RuC14 (dmso-S)(im)] (NAMI-A, im=imidazole), was investigated using density functional theory combined with the conductor-like polarizable continuum model approach. Tile structural characteristics and the detailed energy profiles for the hydrolysis processes of this complex were obtained. For the first hydrolysis step, complex 1 has slightly higher barrier energies than the reported anticancer drug NAMI-A, and the result is in accordance with the experimental evidence indicating larger half-life for complex 1. For the second hydrolysis step, the formation of cis-diaqua species is thermodynamic preferred to that of trans isomers. In addition, on the basis of the analysis of electronic characteristics of species in the hydrolysis process, the trend in nucleophilic attack abilities of hydrolysis products by pertinent biomolecules is revealed and predicted. 展开更多
关键词 NAMI-A-type complex Anticancer activity HYDROLYSIS Density functional theory Conductor-like polarizable continuum model
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模拟酶研究进展 被引量:4
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作者 姚淑琴 郭满栋 《理化检验(化学分册)》 CAS CSCD 北大核心 2004年第8期488-491,共4页
综述了近年来模拟酶的研究及进展,着重介绍了配合物模拟水解酶、超氧化物模拟歧化酶的进展及其他模拟酶的合成研究进展。
关键词 配合模拟水解 超氧化歧化酶 模拟酶的合成
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Electrocatalytic hydrogen evolution from water at low overpotentials with cobalt complexes supported by redox-active bipyridyl-NHC donors
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作者 Lizhu Chen Xiaojun Su Jonah W.Jurss 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第12期3187-3194,共8页
Three cobalt complexes bearing tunable,redox-active bipyridyl N-heterocyclic carbene(NHC)-based ligands have been studied for electrocatalytic hydrogen evolution from aqueous solutions.The effect of structural modific... Three cobalt complexes bearing tunable,redox-active bipyridyl N-heterocyclic carbene(NHC)-based ligands have been studied for electrocatalytic hydrogen evolution from aqueous solutions.The effect of structural modifications to the ligand framework is investigated across the catalyst series,which includes a non-macrocyclic derivative(1-Co)and 16-(2-Co)and 15-(3-Co)membered macrocycles.A structure-activity relationship is demonstrated,in which the macrocyclic complexes have greater activity compared to their non-macrocyclic counterpart with the most rigid catalyst,supported by the 15-membered macrocycle,performing best overall.Indeed,3-Co catalyzes H2 evolution from aqueous pH 4 acetate buffer with a Faradaic efficiency of 97%at a low overpotential of 330 mV.Mechanistic studies are consistent with formation of a cobalt-hydride species that is subsequently protonated to evolve H2 via a heterolytic pathway. 展开更多
关键词 Redox-active bipyridyl N-heterocyclic carbene donors Cobalt complex ELECTROCATALYSIS Water splitting Hydrogen evolution
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