Intramolecular Excimer Formation. I. Diphenyl and Triphenyl Alkanes
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TLDR
In this article, a class of compounds which are so structured that the phenyl groups along a main alkane chain are separated by exactly three carbon atoms, e.g., 1,3-diphenylpropane, 1, 3,5-triphenylpentane, has been found to possess unique fluorescence characteristics.Abstract:
Fluorescence spectra have been measured for a variety of diphenyl and triphenyl alkanes in cyclohexane and in p‐dioxane. A class of compounds which are so structured that the phenyl groups along a main alkane chain are separated by exactly three carbon atoms, e.g., 1,3‐diphenylpropane, 1,3,5‐triphenylpentane, has been found to possess unique fluorescence characteristics. These are the appearance of a long‐wavelength band in the region of 330 mμ and a marked decrease in the fluorescence yield. The long‐wavelength band is attributed to an emission from an excimer (a transient dimer) formed intramolecularly by the association of excited and unexcited phenyl groups. Formation of excimers in the specific class of compounds is discussed in relation to molecular configuration. Efficiency of excimer formation, solvent effects, and quenching by dissolved oxygen are some of the topics discussed through kinetic considerations.read more
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References
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Journal ArticleDOI
Some effects of molecular orientation on fluorescence emission and energy transfer in crystalline aromatic hydrocarbons
TL;DR: In this paper, an examination of their fluorescence spectra in the dissolved and crystalline forms reveals a close similarity both in position and structure for long, thin, aromatic molecules where Davydov splitting of the first absorption band in the crystal is small.
Journal ArticleDOI
The theory of the electronic spectra of aromatic hydrocarbon dimers
J.N. Murrell,J. Tanaka,J. Tanaka +2 more
TL;DR: In this article, the changes of the electronic transition energies which occur on dimerization of naphthalene, anthracene, pyrene and perylene have been calculated, and good agreement between the observed and calculated fluorescence spectrum is obtained if it is assumed that in the fluorescent state of the dimer the interplanar separation of the monomers is approximately 3 a.