Photodegradation of Oligomeric Polyesters Containing Anthraquinone and 1,2-Diamine Units. Single Electron Transfer Induced Cation Radical Bond Cleavage in the Solid State
作者:Jeffrey W. Leon、David G. Whitten
DOI:10.1021/ja00113a012
日期:1995.3
Oligomeric polyesters containing Light-absorbing anthraquinone electron acceptor chromophores and fragmentable 1,2-diamine donors have been synthesized. Irradiation with lambda > 340 nm in solution or as solid films results in photooxidative C-C bond cleavage of the 1,2-diamine units yielding essentially the same products in either case. The solid state photodegradation reaction was monitored using size exclusion chromatography and was found to be substantially less efficient than the corresponding solution reaction. This is attributed to an inefficient forward electron transfer step and the possibility of an induced reversibility of the fragmentation. The efficiency of photodegradation is suggested to be dependent on the donor/acceptor orientations in the solid state.
‘Twisted’ isophthalamide analogues
作者:Simon J. Brooks、Louise S. Evans、Philip A. Gale、Michael B. Hursthouse、Mark E. Light
DOI:10.1039/b413654c
日期:——
Steric interactions in 1,3-dicarboxamidoanthraquinones have been employed to âtwistâ isophthalamide-like anion binding sites; the crystal structure of the fluoride complex of a bis-3,5-dichlorophenylamide derivative shows the receptor acting as a âhydrogen-bonding cornerâ in a â2 + 2â fluoride containing molecular box.