Issue 1, 1986

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.

Article information

Article type
Paper

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

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

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements