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Issue 1, 1986
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Deactivation of excited 1-amino-5,6,7,8-tetrahydronaphthalene in various solvents

Abstract

Fluorescence emission of 1-amino-5,6,7,8-tetrahydronaphthalene is quenched by pyridine at 300 and 77 K and the mechanism involves π-electron delocalization via a hydrogen bond. The probable effect of conformational changes in the molecule also needs to be considered. In polar solvents ethanol and methanol which form hydrogen-bonding chains a significant role is played by resonance transfer from the aminotetrahydronaphthalene and its methyl derivative NN-dimethylaminotetrahydronaphthalene to pyridine in quenching the fluorescence emission of the molecules. Triethylamine quenches fluorescence of aminotetrahydronaphthalene at 300 K but not at 77 K. Possible deactivation process may involve ion-pair formation. Reaction schemes for quenching by pyridine and triethylamine are described. From the non-exponential nature of phosphorescence decay at 77 K formation of hydrogen bond complex between aminotetrahydronaphthalene in the triplet state and the quenchers is inferred.

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Article information


J. Chem. Soc., Perkin Trans. 2, 1986, 79-84
Article type
Paper

Deactivation of excited 1-amino-5,6,7,8-tetrahydronaphthalene in various solvents

K. Chatterjee, S. Laha, S. Chakravorti, T. Ganguly and S. B. Banerjee, J. Chem. Soc., Perkin Trans. 2, 1986, 79
DOI: 10.1039/P29860000079

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