Motor on dating
In the current state of the art, considerable efforts have still to be made to increase the efficiency of energy transduction and devise systems that allow operation in ambient and non-damaging conditions with high rates of directional motions.The need for ultraviolet light to induce the motion of virtually all available light-driven motors especially hampers the broad applicability of these systems.
(d) Extinction coefficients of the Z-(S)-(P)/Z-(R)-(M) isomers (—) and the E-(S)-(P)/E-(R)-(M) isomers (–––) in CHThe (S) and (R) enantiomeric forms of motor 1 are stable (also under irradiation conditions as shown in Supplementary Fig.
The Z-(S)-(P)/Z-(R)-(M) isomers are the thermodynamically stable form of motor 1, which can be obtained in 75% yield by heating a toluene-d solution of 1 to 100 °C for 8 h, as analysed by nuclear magnetic resonance (NMR) spectroscopy.
Under these conditions also 25% of the E-(S)-(P)/E-(R)-(M) isomers are obtained.
HTI consists of a thioindigo and a stilbene fragment, which are connected via a central double bond.
On irradiation, HTI undergoes efficient and reversible Z/E or E/Z photoisomerization.