Cooperativity from electrostatic interactions: understanding bistability in molecular crystals

Gabriele D'Avino; Luca Grisanti; Anna Painelli; Judith Guasch; Imma Ratera; Jaume Veciana

doi:10.1039/B907184A

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CrystEngComm

Issue 10, 2009

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Cooperativity from electrostatic interactions: understanding bistability in molecular crystals

Gabriele D'Avino , Luca Grisanti , Anna Painelli , Judith Guasch , Imma Ratera and Jaume Veciana

CrystEngComm, 2009, 11, 2040-2047

DOI: 10.1039/B907184A
Received 08 Apr 2009, Accepted 11 Jun 2009
First published on the web 02 Jul 2009
This article is part of the collection: Crystal engineering in molecular magnetism

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Abstract
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A general model for explaining bistability in crystals of donor–acceptor (DA) molecules, associated with an intramolecular charge-transfer process, is thoroughly discussed. Specifically, an extension from the two- to the three-essential states model for D-bridge-A molecular units taking into account the active role of the bridge states in the charge-transfer process is proposed. We demonstrate that the phenomenon of bistability is so robust that it survives when such an extended model is adopted. Finally, we discuss the molecular and supramolecular requirements for the observation of bistability phenomena in molecular crystals.

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Gabriele D'Avino
Luca Grisanti
Anna Painelli
Judith Guasch
Imma Ratera
Jaume Veciana

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CrystEngComm

Cooperativity from electrostatic interactions: understanding bistability in molecular crystals

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