The crystal of the title compound, [Co(en)3]4[Ru(CN)6]310H2O (en = ethylenediamine, C2H8N2), is formed from the octahedral cations of Co(en)33+ and anions of Ru(CN)64. The Co atom is coordinated to six nitrogen atoms ...The crystal of the title compound, [Co(en)3]4[Ru(CN)6]310H2O (en = ethylenediamine, C2H8N2), is formed from the octahedral cations of Co(en)33+ and anions of Ru(CN)64. The Co atom is coordinated to six nitrogen atoms of ethylenediamines in a L configuration and the Ru atom is also coordinated to six carbon atoms of cyanides. There is no bridging-cyanide between the metal ions in the structure. The crystal is of monoclinic, space group P21/c with a = 17.686(4), b = 14.496(4), c = 18.019(7) ? b = 116.07(2), V = 4150(2) 3, Z = 2, Mr = 1908.60, C42H116N42O10Co4Ru3, m(MoKa) = 1.391 mm1, Dc = 1.527 g/cm3, F(000) = 2084, R = 0.0520 and wR = 0.1070 for 5443 observed reflections (I > 2s(I)).展开更多
A new binuclear complex [Cu2L(OH)](ClO4)3·2H2O has been synthesized and characterized, where L=2,6-bis{[bis-(2-aminoethyl)amino]methyl}-benzene. In the presence of 0.5 mmol/L complex at pH 8.10 and 37°C, t...A new binuclear complex [Cu2L(OH)](ClO4)3·2H2O has been synthesized and characterized, where L=2,6-bis{[bis-(2-aminoethyl)amino]methyl}-benzene. In the presence of 0.5 mmol/L complex at pH 8.10 and 37°C, the complex can efficiently cleavage pBR322 DNA with a rate constant kobs of 1.35×10-4 s-1. The cleavage occurred by a non-oxidative mechanism showing activity to be dependent on pH.展开更多
Cleavage of DNA pUC19 by [Cu(saldien)(NH3)]Cl2 (here, saldien=bis(salicylicdene)- diethylenetriamine) was investigated at different pHs, times, concentrations, and 37℃. It was found that the copper(Ⅱ) complex coul...Cleavage of DNA pUC19 by [Cu(saldien)(NH3)]Cl2 (here, saldien=bis(salicylicdene)- diethylenetriamine) was investigated at different pHs, times, concentrations, and 37℃. It was found that the copper(Ⅱ) complex could cleave DNA without added coreactants.展开更多
In vivo, there occurs the synthesis and degrada-tion of the nucleic acids, involving the formation and cleav-age of phosphodiester bond. The cleavage modes of phos-phodiester bond can be divided into two types, oxidat...In vivo, there occurs the synthesis and degrada-tion of the nucleic acids, involving the formation and cleav-age of phosphodiester bond. The cleavage modes of phos-phodiester bond can be divided into two types, oxidative and hydrolytic, only the hydrolytic products are sticky and con-nectable, allowing to be religated by ligases. In recent years, great progresses have been made in chemical mimics in the hydrolytic cleavage of phosphodiester bond. Among the found metal complexes with the activity of nucleic acid cleavage, there are mononuclear and dinuclear metal com-plexes, the adopted metal ions including transitional and lanthanide metal ions. However, the reaction rates are still several orders less than those of the natural enzymes. It should be a prosperous and expedient direction to mimic the hydrolytic cleavage of phosphodiester bond by taking the advantages of dinuclear metal complexes.展开更多
The effect of La3+ on potassium channels in rat ventricular myocytes was investigated using the whole-cell patch-clamp recording mode. The Ca2+-independent voltage- activated outward K+ current was activated by the de...The effect of La3+ on potassium channels in rat ventricular myocytes was investigated using the whole-cell patch-clamp recording mode. The Ca2+-independent voltage- activated outward K+ current was activated by the depolar- izing pulse in enzymatically isolated rat ventricular myocytes. After addition of different concentrations La3+ to the bath solution, the outward K+ current was depressed gradually. The inhibition effect was in a concentration-dependent man- ner. The phenomena of the outward K+ current, being the main repolarizing current suppressed by La3+, suggest that the effect of lanthanides on myocardial function should be exploited further.展开更多
基金This subject was supported by the Natural Science Foundation of Shanxi and Hunan Provinces(99JJY2009)
文摘The crystal of the title compound, [Co(en)3]4[Ru(CN)6]310H2O (en = ethylenediamine, C2H8N2), is formed from the octahedral cations of Co(en)33+ and anions of Ru(CN)64. The Co atom is coordinated to six nitrogen atoms of ethylenediamines in a L configuration and the Ru atom is also coordinated to six carbon atoms of cyanides. There is no bridging-cyanide between the metal ions in the structure. The crystal is of monoclinic, space group P21/c with a = 17.686(4), b = 14.496(4), c = 18.019(7) ? b = 116.07(2), V = 4150(2) 3, Z = 2, Mr = 1908.60, C42H116N42O10Co4Ru3, m(MoKa) = 1.391 mm1, Dc = 1.527 g/cm3, F(000) = 2084, R = 0.0520 and wR = 0.1070 for 5443 observed reflections (I > 2s(I)).
文摘A new binuclear complex [Cu2L(OH)](ClO4)3·2H2O has been synthesized and characterized, where L=2,6-bis{[bis-(2-aminoethyl)amino]methyl}-benzene. In the presence of 0.5 mmol/L complex at pH 8.10 and 37°C, the complex can efficiently cleavage pBR322 DNA with a rate constant kobs of 1.35×10-4 s-1. The cleavage occurred by a non-oxidative mechanism showing activity to be dependent on pH.
基金support of the National Natural Science Foundation of China(No:20171031)the Shanxi Provincial Natural Science Foundauon for Youth(No:20011007)
文摘Cleavage of DNA pUC19 by [Cu(saldien)(NH3)]Cl2 (here, saldien=bis(salicylicdene)- diethylenetriamine) was investigated at different pHs, times, concentrations, and 37℃. It was found that the copper(Ⅱ) complex could cleave DNA without added coreactants.
文摘In vivo, there occurs the synthesis and degrada-tion of the nucleic acids, involving the formation and cleav-age of phosphodiester bond. The cleavage modes of phos-phodiester bond can be divided into two types, oxidative and hydrolytic, only the hydrolytic products are sticky and con-nectable, allowing to be religated by ligases. In recent years, great progresses have been made in chemical mimics in the hydrolytic cleavage of phosphodiester bond. Among the found metal complexes with the activity of nucleic acid cleavage, there are mononuclear and dinuclear metal com-plexes, the adopted metal ions including transitional and lanthanide metal ions. However, the reaction rates are still several orders less than those of the natural enzymes. It should be a prosperous and expedient direction to mimic the hydrolytic cleavage of phosphodiester bond by taking the advantages of dinuclear metal complexes.
基金This work was supported by the National Natural Science Foundation of China(Grant No.29890280)the Shanxi Provincial and Shanxi University Natural Science Foundation.
文摘The effect of La3+ on potassium channels in rat ventricular myocytes was investigated using the whole-cell patch-clamp recording mode. The Ca2+-independent voltage- activated outward K+ current was activated by the depolar- izing pulse in enzymatically isolated rat ventricular myocytes. After addition of different concentrations La3+ to the bath solution, the outward K+ current was depressed gradually. The inhibition effect was in a concentration-dependent man- ner. The phenomena of the outward K+ current, being the main repolarizing current suppressed by La3+, suggest that the effect of lanthanides on myocardial function should be exploited further.
