Intra- and Intermolecular Charge Transfer in Aggregates of Tetrathiafulvalene-Triphenylmethyl Radical Derivatives in Solution

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• 作者：Judith Guasch ; Luca Grisanti ; Manuel Souto ; Vega Lloveras ; Jos茅 Vidal-Gancedo ; Imma Ratera ; Anna Painelli ; Concepci贸 Rovira ; Jaume Veciana
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：May 8, 2013
• 年：2013
• 卷：135
• 期：18
• 页码：6958-6967
• 全文大小：593K
• 年卷期：v.135,no.18(May 8, 2013)
• ISSN：1520-5126

文摘

An extensive investigation of aggregation phenomena occurring in solution for a family of electron donor鈥揳cceptor derivatives, based on polychlorotriphenylmethyl radicals (PTM) linked via a vinylene-bridge to tetrathiafulvalene (TTF) units, is presented. A large set of temperature and/or concentration dependent optical absorption and electron spin resonance (ESR) spectra in a solution of dyads bearing different number of electrons and/or with a hydrogenated PTM residue offer reliable information on the formation of homo dimers and mixed valence dimers. The results shed light on the reciprocal influence of intramolecular electron transfer (IET) within a dyad and the intermolecular charge transfer (CT) occurring in a dimer between the TTF residues and are rationalized based on a theoretical model that describes both interactions.