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Matrix dependence of light emission from TCNQ adducts.

Bloor, D. and Kagawa, Y. and Szablewski, Marek and Ravi, M. and Clark, S. J. and Cross, G. H. and Palsson, L. O. and Beeby, A. and Parmer, C. and Rumbles, G. (2001) 'Matrix dependence of light emission from TCNQ adducts.', Journal of materials chemistry., 11 (12). pp. 3053-3062.

Abstract

The reactions of primary and secondary amines with 7,7,8,8-tetracyano-p-quinodimethane(TCNQ) lead to mono- and di-substituted adducts. Fluorescence emission has been observed for several of these compounds. The luminescence property of the TCNQ adducts, 2-{4-[(2,6-dimethylmorpholin-4-yl)(4-methylpiperidin-1-yl)methylene]cyclohexa-2,5-dien-1-ylidene}malononitrile (MORPIP) and 2-{4-[cyclohex-1-yltetrahydropyrimidin-2(1H)-ylidene]cyclohexa-2,5-dien-1-ylidene}malononitrile (AMINO) were investigated in a variety of environments. These included alcohol solutions and crystals at room temperature and glass forming solvents and polymer films as a function of temperature. The fluorescence quantum yields and Stokes' shifts were found to be very sensitive to the matrix. Crystal structure data show that the molecules are non-planar in the ground state. The matrix effect is discussed in terms of the conformational change during photo-excitation and the constraint imposed on this by the matrix.

Item Type:Article
Additional Information:ISI:000172664200038
Keywords:Intramolecular charge-transfer, Pull quinonoid compounds, Excited-state, Solvent polarity, Polymers, Dyes, Solvatochromism, Photophysics, Alignment, Viscosity.
Full text:Full text not available from this repository.
Publisher Web site:http://dx.doi.org/10.1039/b104992p
Record Created:19 Dec 2006
Last Modified:26 Mar 2013 16:07

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