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Published in

Elsevier, Tetrahedron, 4(57), p. 725-731

DOI: 10.1016/s0040-4020(00)01058-9

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Synthesis and properties of π-extended triads (A2D) derived from tetrathiafulvalene (TTF) and tetracyano-p-quinodimethane (TCNQ)

This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

A new series of electroactive triads (10a–c) has been prepared by Knoevenagel condensation of formyl-containing π-extended TTFs (9a–c) to a suitably functionalized dimer (8) derived from the electron acceptor TCAQ. The electronic spectra of the triads (10a–c) show the presence of an intramolecular charge transfer (ICT) band from the donor π-extended TTF unit to the conjugated carbonyl groups. Theoretical calculations at the semiempirical PM3 level predict different geometrical structures for the triads which rule out a through space electronic interaction between the donor (π-extended TTF) and acceptor (TCAQs) moieties. Cyclic voltammetric measurements reveal the amphoteric behaviour of triads 10a–c and a negligible electronic interaction between the redox chromophores.