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Title: Reversible single-crystal-to-single-crystal photochemical formation and thermal cleavage of a cyclobutane ring
Authors: Kole, G.K.
Kojima, T.
Kawano, M.
Vittal, J.J. 
Keywords: C-C bond cleavage
coordination polymers
solid-state reactions
Issue Date: 17-Feb-2014
Citation: Kole, G.K., Kojima, T., Kawano, M., Vittal, J.J. (2014-02-17). Reversible single-crystal-to-single-crystal photochemical formation and thermal cleavage of a cyclobutane ring. Angewandte Chemie - International Edition 53 (8) : 2143-2146. ScholarBank@NUS Repository.
Abstract: A [2+2] cycloaddition reaction has been observed in a number of solids. The cyclobutane ring in a photodimerized material can be cleaved into olefins by UV light and heat. The high thermal stability of the metal-organic salt K 2SDC (H2SDC=4,4'-stilbenedicarboxylic acid) has been successfully utilized to investigate the reversible cleavage of a cyclobutane ring. The two polymorphs of K2SDC undergo reversible cyclobutane formation by UV light and cleavage by heat in cycles. Of these, one polymorph retains its single-crystal nature during the reversible processes. Polymorphs are known to show different physical properties and chemical reactivities. This work reveals that the retention of single-crystal nature is strongly associated with the packing of molecules, which is controlled by kinetics and thermodynamics. The photoemissive nature of the products makes this as a promising material for photoswitches and optical data storage devices. Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Source Title: Angewandte Chemie - International Edition
ISSN: 14337851
DOI: 10.1002/anie.201306746
Appears in Collections:Staff Publications

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