pH value-dependent electronic absorption and Ru(III/II) potential of bis-tridentate pincer ruthenium complexes
文献类型：期刊论文
| 作者 | Shao, Jiang-Yang1; Zhong, Yu-Wu1,2 |
| 刊名 | JOURNAL OF ORGANOMETALLIC CHEMISTRY
 |
| 出版日期 | 2017-09-15 |
| 卷号 | 845页码:144-150 |
| 关键词 | Pincer Complexes Ruthenium Ph Effect Cyclometalated Complexes Electrochemistry |
| 英文摘要 | Two bis-tridentate pincer complexes [Ru(H(2)bip)(Mebib)](PF6)(2) (1(PF6)(2)) and [Ru(H(2)bip)(H(2)bib)](PF6)(2) (2(PF6)(2)) were prepared and studied, where H(2)bip is 2,6-bis(benzimidazol-2-yl) pyridine, Mebib is the 2-deprotonated 1,3-bis(N-methylbenzimidazol-2-yl) benzene, and H(2)bib is 2-deprotonated 1,3bis(benzimidazol-2-yl) benzene. These complexes were isolated as cyclometalated Ru(III) salts with a [(NCN)(NNN)] coordination due to a low Ru(III/II) redox potential. Complex 1(PF6) 2 has two N H protons on the NNN ligand side, while complex 2(PF6)(2) has four N-H protons. Absorption spectral analysis showed that two deprotonation steps were distinguished for 1(PF6)(2) with pK(a1) and pK(a2) of 3.46 and 5.88, respectively. In comparison, four deprotonation steps were observed for 2(PF6)(2) with four pK(a) values of 3.45, 5.95, 8.95, and 10.98, respectively. When the solution was changed from acidic to basic, the Ru(III/II) redox wave of 1(PF6)(2) and 2(PF6)(2) shifted from +0.20 V vs Ag/AgCl to a less positive region by 540 and 850 mV, respectively. These studies suggest that the electronic absorption and electrochemical properties of these complexes are very sensitive to pH effect. (C) 2017 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/38965]  |
| 专题 | 化学研究所_光化学实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, CAS Key Lab Photochem, Beijing Natl Lab Mol Sci, 2 Bei Yi Jie, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shao, Jiang-Yang,Zhong, Yu-Wu. pH value-dependent electronic absorption and Ru(III/II) potential of bis-tridentate pincer ruthenium complexes[J]. JOURNAL OF ORGANOMETALLIC CHEMISTRY,2017,845:144-150. |
| APA | Shao, Jiang-Yang,&Zhong, Yu-Wu.(2017).pH value-dependent electronic absorption and Ru(III/II) potential of bis-tridentate pincer ruthenium complexes.JOURNAL OF ORGANOMETALLIC CHEMISTRY,845,144-150. |
| MLA | Shao, Jiang-Yang,et al."pH value-dependent electronic absorption and Ru(III/II) potential of bis-tridentate pincer ruthenium complexes".JOURNAL OF ORGANOMETALLIC CHEMISTRY 845(2017):144-150. |
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来源：化学研究所
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