Go to  Advanced Search

Please note that cIRcle is currently being upgraded to DSpace v5.1. The upgrade means that the cIRcle service will *not* be accepting new submissions from 5:00 PM on September 1, 2015 until 5:00 PM on September 4, 2015. All cIRcle material will still be accessible during this period. Apologies for any inconvenience.

The absorption and fluorescence of anthracene in the near ultra-violet

Show full item record

Files in this item

Files Size Format Description   View
UBC_1964_A6_7 K3.pdf 3.990Mb Adobe Portable Document Format   View/Open
Title: The absorption and fluorescence of anthracene in the near ultra-violet
Author: Katagiri, Seiko
Degree Master of Science - MSc
Program Chemistry
Copyright Date: 1964
Subject Keywords Anthracene -- Spectra; Absorption spectra; Fluorescence
Abstract: The fluorescence and absorption spectra of anthracene in the near ultra-violet were investigated in n-heptane, fluorene, biphenyl and n-hexane matrices at low temperature. The assignment of the excited electronic state as ‘Biu was confirmed. In the ground electronic state eight Qg and five b₃g, and in the 'Bᵢᵥ upper electronic state seven Qg and five b₃g fundamentals were assigned. It was deduced that the potential surfaces of the 'Ag and the 'Bᵢᵥ states were similar in shape as there was an approximate agreement between the values of corresponding fundamental vibrations in the two electronic states. The potential surfaces were unusually harmonic for a polyatomic molecule, at least along the normal co-ordinates available to this study. No evidence for the presence of anharmonicity was found in even the highest overtone (the third) measured, although several possible examples of Fermi resonance between vibrational modes were observed both in fluorescence and in absorption. The Fermi resonances were assigned primarily on the basis of intensity transfer between lines rather than line shifts. The presence of a weaker long-axis polarized transition ( 'B₂ᵥ- 'Ag ) in anthracene predicted by theory was not detected. The lowest energy electronic transition in fluorene was found to be polarized along the long axis of this molecule.
URI: http://hdl.handle.net/2429/37650
Series/Report no. UBC Retrospective Theses Digitization Project [http://www.library.ubc.ca/archives/retro_theses/]
Scholarly Level: Graduate

This item appears in the following Collection(s)

Show full item record

All items in cIRcle are protected by copyright, with all rights reserved.

UBC Library
1961 East Mall
Vancouver, B.C.
Canada V6T 1Z1
Tel: 604-822-6375
Fax: 604-822-3893