Photoisomerization of bis(9-anthryl)methane and other linked anthracenes. The role of excimers and biradicals in photodimerization
作者:William R. Bergmark、Guilford Jones、Thomas E. Reinhardt、Arthur M. Halpern
DOI:10.1021/ja00489a018
日期:1978.10
A series of linkedanthracenes capable of storing photon energy through endoergic valence photo-isomerization have been studied. Photophysical and photochemical characteristics of the systems have been completely characterized by measurement of fluorescence quantum yields and lifetimes, and efficiencies for forward and reverse isomerization. The release of energy stored in photoisomers has been measured
作者:Daniel T. Glatzhofer、Yongwu Liang、Masood A. Khan
DOI:10.1039/c39930000742
日期:——
Photodimerization of [(RuCp)(η6-dbqm)]+PF6â3(Cp =η5-cyclopentadienyl; dbqm = dibenzo-p-quinodimethane) in solution using visible light selectively afforded a stable organometallic adduct of the normally labile intramolecular photoisomer of [2.2](9,10)anthracenophane.
Effects of substituents on the length of central C(sp<sup>3</sup>)–C(sp<sup>3</sup>) bond in anthracene photodimers and related molecules
作者:Dennis A. Dougherty、Chang Sun Choi、Gerd Kaupp、Andrzej B. Buda、Jerzy M. Rudziński、Eiji Ōsawa
DOI:10.1039/p29860001063
日期:——
lepidopterenes (8) are studied. X-Ray analysis of the photodimer (10) of 9,10-difluoroanthracene gave a C(9)–C(10′) bond length of 1.631 (3)Å. An attempt to re-determine molecular structure of the photoisomer (5) of [2.2](9,10) anthracenophane (12) by neutron diffraction analysis is also reported [C(9)–C(10′): obs. 1.64(1), calc. 1.63(1)Å]. The D2 structure that had been proposed for the minimum-energy
Stabilization of dibenzo-p-quinodimethane by (pentamethylcyclopentadienyl)ruthenium cation
作者:Daniel T. Glatzhofer、Yongwu Liang、Masood A. Khan、Paul J. Fagan
DOI:10.1021/om00050a005
日期:1991.4
Reaction of [2.2]anthracenophane (1) with [Cp*Ru(CH3CN)3]+CF3SO3- (Cp* = eta-5-pentamethylcyclopentadienyl) results in cleavage of the ethano bridges to form stable complexes (trans-[(Cp*Ru)2(eta-6:eta-6-dibenzo-p-quinodimethane)]2+(CF3SO3-)2 (3) and [(Cp*Ru)(eta-6-dibenzo-p-quinodimethane)]+CF3SO3- (4)) of the highly reactive dibenzo-p-quinodimethane (2). An X-ray structural analysis of 3 shows the dibenzo-p-quinodimethane moiety to be in a boat conformation.