Direct observation of electron-transfer-induced conformational transformation (molecular actuation) in a bichromophoric electron donor.
With the aid of laser-flash photolysis, the one-electron oxidation of conformationally mobile tetramethoxydibenzobicyclo[4.4.1]undecane (1), using photoexcited chloranil as an oxidant, allows us to show that extended 1(+•) undergoes a conformational transformation to π-stacked folded 1(+•) on a microsecond time scale (τ ≈ 1 μs), which is at least six times longer than that found for the conformationally locked model compound.
Shukla
Ruchi
R
Marquette University, Department of Chemistry, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, USA.
Thakur
Khushabu
K
Chebny
Vincent J
VJ
Reid
Scott A
SA
Rathore
Rajendra
R