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The Absorption Spectrum of the Lowest Triplet State in Crystalline trans ‐Stilbene
Author(s) -
Ting ChenHanson
Publication year - 1970
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.197000018
Subject(s) - chemistry , crystal (programming language) , exciton , absorption spectroscopy , absorption (acoustics) , anthracene , coupling (piping) , spin (aerodynamics) , spectrum (functional analysis) , crystallography , molecular physics , photochemistry , condensed matter physics , optics , physics , mechanical engineering , engineering , computer science , programming language , quantum mechanics , thermodynamics
The absorption spectrum of the lowest triplet state (T 1 *‐S 0 ) of trans ‐stilbene is observed between 14,000 and 18,000 cm −1 with a crystal four centimeters long, cooled to 4.2°.K. This transition is more intense (f=3×10 −9 ) than the similar transition in anthracene, due to vibration‐induced spin‐orbital coupling. Vibrational structures in the spectrum are well resolved and seven frequencies are assigned to normal modes in the T 1 * state of trans ‐stilbene. Exciton structures in crystal are not resolved.