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

Chengshuo Shen (1) , Xiaoyan He (1) , Loic Toupet (2) , Lucie Norel (1) , Stéphane Rigaut (1) , Jeanne Crassous (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 IPR - Institut de Physique de Rennes

We describe the synthesis of mono- and bis([6]helicene-≡-Ru(dppe)2-≡)-DTE complexes 1o,c and 2o,c. The photo-chromic and electrochromic properties were studied and attractive isomerization processes were observed, ie. spontaneous reopening of [1c] ·+ to [1o] ·+ and ring closure of [2o] 2+ to [2c] 2+. Due to strong chiroptical responses, all 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.

Domaines: Chimie organique

Chengshuo Shen, Xiaoyan He, Loic Toupet, Lucie Norel, Stéphane Rigaut, et al.. Dual Redox and Optical Control of Chiroptical Activity in Photochromic Dithienylethenes Decorated with Hexahelicene and Bis-Ethynyl-Ruthenium Units. Organometallics, 2018, 37 (5), pp.697-705. ⟨10.1021/acs.organomet.7b00534⟩. ⟨hal-01586567⟩