Synthesis and Physical Properties of Strained Doubly Phosphorus-Bridged Biaryls and Viologens
作者:Tobias W. Greulich、Eriko Yamaguchi、Carsten Doerenkamp、Maximilian Lübbesmeyer、Constantin G. Daniliuc、Aiko Fukazawa、Hellmut Eckert、Shigehiro Yamaguchi、Armido Studer
DOI:10.1002/chem.201605272
日期:2017.5.2
moiety in these highly strained planar π‐systems is rigidified by double P‐bridging. The electronic properties of the core biaryl entity are varied by introducing N‐donor substituents or by installing N‐atoms within the π‐system, thereby moving to the viologen core structure. The electrochemical and photophysical properties of these compounds are discussed and compared with those of related systems
A biphenyl containing two electron-donating and two electron-accepting moieties: a rigid and small donor–acceptor–donor ladder system
作者:Tobias W. Greulich、Naoya Suzuki、Constantin G. Daniliuc、Aiko Fukazawa、Eriko Yamaguchi、Armido Studer、Shigehiro Yamaguchi
DOI:10.1039/c5cc03063c
日期:——
A small ladder-type donor–acceptor–donor π-system, a biphenyl furnishing two phosphine oxide bridges and two amino groups, showed significantly red-shifted absorption and fluorescence.
fourfold radicalphosphanylation of 2,2,2′,2′‐tetrabromobiphenyl with a bis(stannyl)phosphane followed by oxidation produces a highly strained biphenyl with two phosphoryl bridges (see picture). Extended π‐conjugated compounds consisting of this core unit can be also synthesized by using the same approach. The two phosphoryl bridges significantly alter the electronic structure, making this biphenyl a unique
Synthesis and Properties of Bisphosphole‐Bridged Ladder Oligophenylenes
作者:David Hanifi、Andrew Pun、Yi Liu
DOI:10.1002/asia.201200631
日期:2012.11
towards LOPPs with multiple phosphorous bridges. Herein, we describe the synthesis and properties of a new class of bisphosphole‐bridged ladder oligo(p‐phenylene)s and the related phosphoxides. The synthesis of phospholes was achieved by a four‐fold free‐radical phosphanylation reaction of a tetrabromo p‐terphenylene or biphenyl‐thiophene. Sequential trapping of four highly reactive aryl radicals occurred