3 years ago

Dual Redox and Optical Control of Chiroptical Activity in Photochromic Dithienylethenes Decorated with Hexahelicene and Bis-Ethynyl-Ruthenium Units

Dual Redox and Optical Control of Chiroptical Activity in Photochromic Dithienylethenes Decorated with Hexahelicene and Bis-Ethynyl-Ruthenium Units
Lucie Norel, Jeanne Crassous, Xiaoyan He, Stéphane Rigaut, Loïc Toupet, Chengshuo Shen
We describe the synthesis of mono- and bis([6]helicene-≡-Ru(dppe)2-≡)-DTE complexes 1o,c and 2o,c. The photochromic and electrochromic properties were studied, and attractive isomerization processes were observed, i.e., spontaneous reopening of [1c]•+ to [1o]•+ and ring closure of [2o]2+ to [2c]2+. Due to strong chiroptical responses, all of these chiral complexes correspond to new types of chiroptical switches (triggered by light and/or redox stimuli) and could be described as either “NOR” or “OR” logic gates.

Publisher URL: http://dx.doi.org/10.1021/acs.organomet.7b00534

DOI: 10.1021/acs.organomet.7b00534

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