A large selection of triptycenes functionalized with tetrathiafulvalene (TTF) units as well as triptycenes containing extended TTFs as a part of the triptycene core have been synthesized utilizing new triptycene di- and tetraaldehydes as well as bis-, tetrakis- and hexakis(bromomethyl) derivatives. The largest scaffold contains a total of 12 TTFs around the central triptycene core. From spectroelectro-chemical and chemical oxidation studies, we have elucidated the extent to which an increasing number of electrostatic interactions among oxidized TTF units exert an influence on the absorption characteristics. (c) 2007 Elsevier Ltd. All rights reserved.
Dissociation Reactions of Free Tetrapyridinium Tetracations and of Their Catenanes
作者:Jana Roithová、Petr Milko、Claire L. Ricketts、Detlef Schröder、Thierry Besson、Václav Dekoj、Martin Bělohradský
DOI:10.1021/ja071058h
日期:2007.8.1
Electrospray ionization from methanolic solution can be used for the generation of the free cyclophane tetracations 1(4+)-3(4+) from the corresponding hexafluorophosphates. In the idealized gas phase, these tetracations are long-lived and can easily be handled for further spectroscopic studies. Collision-induced dissociation of the free tetracations brings about charge separation via cleavage of the pyridinium bonds, leading to a pair of dications. Subsequently, these dications undergo another charge separation reaction to finally afford singly charged cations. In addition to the free tetracations, also the corresponding trications having one PF6- counterion are examined. Collision-induced dissociation of the trications leads to a formal substitution reaction concomitant with C-F bond formation. Further, the catenanes of the tetracations 1(4+)-3(4+) with bis-p-phenylene-34-crown-10 (4) are investigated. For the parent compound 1, also the gas-phase infrared spectrum is reported for the first time.
POLYIPTYCENYLENE VINYLENE AND METHOD OF MAKING THE SAME
申请人:Lutsen Laurence
公开号:US20090246532A1
公开(公告)日:2009-10-01
Methods are provided for obtaining soluble or insoluble poly(iptycenylene vinylene) homo- and co-polymers via a soluble precursor polymer. The polymers obtained by the methods can be used in electronic or opto-electronic devices, e.g., chemosensors.
Method of preparing derivatives of poly(arylene vinylene) and method of preparing an electronic device including same