TY - JOUR
T1 - Efficient Conversion of Light to Chemical Energy
T2 - Directional, Chiral Photoswitches with Very High Quantum Yields
AU - Moormann, Widukind
AU - Tellkamp, Tobias
AU - Stadler, Eduard
AU - Röhricht, Fynn
AU - Näther, Christian
AU - Puttreddy, Rakesh
AU - Rissanen, Kari
AU - Gescheidt, Georg
AU - Herges, Rainer
PY - 2020/8/24
Y1 - 2020/8/24
N2 - Photochromic systems have been used to achieve a number of engineering functions such as light energy conversion, molecular motors, pumps, actuators, and sensors. Key to practical applications is a high efficiency in the conversion of light to chemical energy, a rigid structure for the transmission of force to the environment, and directed motion during isomerization. We present a novel type of photochromic system (diindane diazocines) that converts visible light with an efficiency of 18 % to chemical energy. Quantum yields are exceptionally high with >70 % for the cis–trans isomerization and 90 % for the back-reaction and thus higher than the biochemical system rhodopsin (64 %). Two diastereomers (meso and racemate) were obtained in only two steps in high yields. Both isomers are directional switches with high conversion rates (76–99 %). No fatigue was observed after several thousands of switching cycles in both systems.
AB - Photochromic systems have been used to achieve a number of engineering functions such as light energy conversion, molecular motors, pumps, actuators, and sensors. Key to practical applications is a high efficiency in the conversion of light to chemical energy, a rigid structure for the transmission of force to the environment, and directed motion during isomerization. We present a novel type of photochromic system (diindane diazocines) that converts visible light with an efficiency of 18 % to chemical energy. Quantum yields are exceptionally high with >70 % for the cis–trans isomerization and 90 % for the back-reaction and thus higher than the biochemical system rhodopsin (64 %). Two diastereomers (meso and racemate) were obtained in only two steps in high yields. Both isomers are directional switches with high conversion rates (76–99 %). No fatigue was observed after several thousands of switching cycles in both systems.
KW - diazocine
KW - energy conversion
KW - photochemistry
KW - photochromism
KW - quantum yields
UR - http://www.scopus.com/inward/record.url?scp=85086003194&partnerID=8YFLogxK
U2 - 10.1002/anie.202005361
DO - 10.1002/anie.202005361
M3 - Article
AN - SCOPUS:85086003194
VL - 59
SP - 15081
EP - 15086
JO - Angewandte Chemie / International Edition
JF - Angewandte Chemie / International Edition
SN - 1433-7851
IS - 35
ER -