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Light‐Controlled Interconversion between a Self‐Assembled Triangle and a Rhombicuboctahedral Sphere
Author(s) -
Han Muxin,
Luo Yuansu,
Damaschke Bernd,
Gómez Laura,
Ribas Xavi,
Jose Anex,
Peretzki Patrick,
Seibt Michael,
Clever Guido H.
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201508307
Subject(s) - photoswitch , supramolecular chemistry , self assembly , photochromism , chemistry , crystallography , spectroscopy , integrating sphere , coordination sphere , grazing incidence small angle scattering , nanotechnology , chemical physics , photochemistry , materials science , scattering , optics , physics , crystal structure , organic chemistry , quantum mechanics , neutron scattering , small angle neutron scattering
Stimuli‐responsive structural reorganizations play an important role in biological processes, often in combination with kinetic control scenarios. In supramolecular mimics of such systems, light has been established as the perfect external trigger. Here, we report on the light‐driven structural rearrangement of a small, self‐assembled Pd 3 L 6 ring based on photochromic dithienylethene (DTE) ligands into a rhombicuboctahedral Pd 24 L 48 sphere measuring about 6.4 nm across. When the wavelength is changed, this interconversion can be fully reversed, as confirmed by NMR and UV/Vis spectroscopy as well as mass spectrometry. The sphere was visualized by AFM, TEM, and GISAXS measurements. Due to dissimilarities in the photoswitch conformations, the interconversion rates between the two assemblies are drastically different in the two directions.