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Updated: Jan 31, 2026

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch
Published on: February 7, 2022
Computational design of a molecular triple photoswitch for wavelength-selective control
Chong Yang1, Chavdar Slavov2, Hermann A Wegner3
1Interdisciplinary Center for Scientific Computing , Heidelberg University , Im Neuenheimer Feld 205A , 69120 Heidelberg , Germany .
Abstract:
A small single molecule with multiple photoswitchable subunits, selectively and independently controllable by light of different wavelengths, is highly attractive for applications in multi-responsive materials and biological sciences. Herein, triple photoswitches are presented consisting of three independent azobenzene (AB) subunits that share a common central phenyl ring: the meta-trisazobenzenes (MTA). It is the unique meta-connectivity pattern leading to decoupling of all azo-subunits although they do overlap spatially. Based on this pattern, we design a triple MTA photoswitch, as proof-of-principle, with three different, electronically independent AB branches on the computer, which can be individually photo-excited to trigger ultra-fast E → Z isomerization at the selected AB branch.
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