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

1.
Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, ;
2.
Beijing 100190, China

Corresponding author: Yu-Wu Zhong,
Received Date: 28 January 2015
Available Online: 17 March 2015
Fund Project: the Ministry of Science and Technology of China (No. 2012YQ120060) (No. 2011CB932301)

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.
- Mixed-valent compounds,
- Spectroelectrochemistry,
- Near-infrared electrochromism,
- Redox-active compounds,
- Triarylamines
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沈阳化工大学材料科学与工程学院沈阳 110142