Concentration Dependence of the T₁←Sₒ Transition in 1-Bromonophthalene: The External Effect of Neighboring Molecules

Author: Scott, Gary Walter

Year: 1965

Degree: Bachelor's thesis

Advisor: Robinson, G. Wilse

Committee Member: Unknown, Unknown

Option: Chemistry

Abstract

The absorption coefficient of the lowest T₁←S_o transition of 1-bromonaphthalene is investigated at several different concentrations. It is shown that there is a decrease of oscillator strength as the concentration is decreased indicating that there is an inter-molecular spin-orbit coupling between 1-bromonaphthalene molecules. It is thus indicated that past reports of the strength of the T₁←S_o transition for 1-bromonaphthalene were too high since these reports were based on highly concentrated solutions and did not account for an external heavy atom perturbation between molecules of the same species. Also experiments show that past reports of oscillator strength of T₁←S_o for the pure liquid 1-bromo- and 1-iodonaphthalenes may be too high.

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