In Situ Generation of Wavelength-Shifting Donor-Acceptor Mixed-Monolayer-Modified Surfaces
作者:Anthony C. Coleman、Jetsuda Areephong、Javier Vicario、Auke Meetsma、Wesley R. Browne、Ben L. Feringa
DOI:10.1002/anie.201002939
日期:2010.9.3
Given the green light: Irradiation of a monolayer of an overcrowded‐alkene‐based molecular switch (see picture, left) results in generation of a mixed monolayer containing its photocyclized analogue. An efficient energy‐transfer process between these compounds is evident from the observed red‐shifted emission of the photocyclized switch.
Fast synthesis and redox switching of di- and tetra-substituted bisthioxanthylidene overcrowded alkenes
作者:Brian P. Corbet、Marco B. S. Wonink、Ben L. Feringa
DOI:10.1039/d1cc03098a
日期:——
A rapid and efficient method for the synthesis of overcrowded alkenes using (trimethylsilyl)diazomethane provides a range of substituted bisthioxanthylidenes. We show large conformational redox switching from folded to orthogonal states, which tolerates many substitution patterns. The facile access to bisthioxanthylidene switches with the potential for further functionalization, in combination with
Sterically overcrowded alkenes; a stereospecific photochemical and thermal isomerization of a benzoannulated bithioxanthylidene
作者:Ben L. Feringa、Wolter F. Jager、Ben de Lange
DOI:10.1039/c39930000288
日期:——
Enantiomericallypure sterically overcrowded 12H-benzo[a]thioxanthenyl-12-(2-′methyl-9′H-thioxanthene-9′-ylidene) shows a Stereospecific photochemical and thermal isomerization, of the P-trans into the M-cis isomer (andvice versa), with a large thermal isomerization barrier (ΔG‡= 28.6 kcal mol–1)(1 cal = 4.184 J), making this type of molecule especially suitable as the key structural unit for applications