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Bis-triarylamine with a cyclometalated diosmium bridge: A multi-stage redox-active system

Meng-Jia Sun ,  Hai-Jing Nie ,  Jian-Nian Yao ,  Yu-Wu Zhong

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Citation:  Meng-Jia Sun, Hai-Jing Nie, Jian-Nian Yao, Yu-Wu Zhong. Bis-triarylamine with a cyclometalated diosmium bridge: A multi-stage redox-active system[J]. Chinese Chemical Letters, 2015, 26(6): 649-652. doi: 10.1016/j.cclet.2015.03.032 shu

Bis-triarylamine with a cyclometalated diosmium bridge: A multi-stage redox-active system

    • 通讯作者: Yu-Wu Zhong,
  • 基金项目:

    the National Basic Research 973 program of China (No. 2011CB932301) (No. 2011CB932301)

    Technology of China (No. 2012YQ120060) (No. 2012YQ120060)

    the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDB 12010400) for funding support. (No. XDB 12010400)

摘要: A tetra(pyrid-2-yl)-pyrazine-bridged cyclometalated diosmium complex 1(PF6)2 with two distal redoxactive organic amine substituents has been synthesized and characterized. This complex displays four consecutive and separated anodic redox waves at +0.24, +0.38, +0.64, and +0.71 V vs. Ag/AgCl. Upon stepwise oxidation, four-step absorption spectral changes in the visible to near-infrared region have been observed. The different redox states of 1 (12+ through 16+) can be distinguished by the significantly different absorption spectra in the visible and near-infrared region. DFT calculations of 13+ show that the spin is delocalized on both osmium-amine components.

English

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  • 发布日期:  2015-04-02
  • 收稿日期:  2015-01-28
  • 网络出版日期:  2015-03-17
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