skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Excimer formation from triplet-triplet annihilation reactions of the lowest-lying triplet excited state in aluminum(III), silicon(IV), and metal-free phthalocyanines: medium and magnetic field effects on the rate of reaction

Abstract

The relaxation kinetics of aluminum(III), silicon(IV), and metal-free phthalocyanine (PcH/sub 2/) have been investigated by both conventional and laser flash photolysis. The observed excited-state decay kinetics are shown to be controlled by the excited-state concentration, the nature of the solvent, and the presence of an external magnetic field. Triplet-triplet annihilation is shown to be a dominating factor in the excited-state scheme. The second-order deviations observed in the relaxation kinetics of the phthalocyanines under various conditions are discussed in terms of an excimer-((/sup 3/E/sub u/)Pc* + (/sup 3/E/sub u/)Pc* ..-->.. (/sup 1/A/sub 1g/) (Pc-Pc)*) mediated mechanism. 34 references, 5 figures, 2 tables.

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Notre Dame, IN
OSTI Identifier:
5681772
Resource Type:
Journal Article
Journal Name:
J. Phys. Chem.; (United States)
Additional Journal Information:
Journal Volume: 90:9
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALUMINIUM COMPLEXES; CHEMICAL REACTION KINETICS; PHOTOLYSIS; PHTHALOCYANINES; SILICON COMPLEXES; ABSORPTION SPECTROSCOPY; EXCITED STATES; EXPERIMENTAL DATA; MAGNETIC FIELDS; VISIBLE SPECTRA; CHEMICAL REACTIONS; COMPLEXES; DATA; DECOMPOSITION; DYES; ENERGY LEVELS; HETEROCYCLIC COMPOUNDS; INFORMATION; KINETICS; NUMERICAL DATA; ORGANIC COMPOUNDS; PHOTOCHEMICAL REACTIONS; REACTION KINETICS; SPECTRA; SPECTROSCOPY; 400500* - Photochemistry

Citation Formats

Frink, M E, Geiger, D K, and Ferraudi, G J. Excimer formation from triplet-triplet annihilation reactions of the lowest-lying triplet excited state in aluminum(III), silicon(IV), and metal-free phthalocyanines: medium and magnetic field effects on the rate of reaction. United States: N. p., 1986. Web. doi:10.1021/j100400a036.
Frink, M E, Geiger, D K, & Ferraudi, G J. Excimer formation from triplet-triplet annihilation reactions of the lowest-lying triplet excited state in aluminum(III), silicon(IV), and metal-free phthalocyanines: medium and magnetic field effects on the rate of reaction. United States. doi:10.1021/j100400a036.
Frink, M E, Geiger, D K, and Ferraudi, G J. Thu . "Excimer formation from triplet-triplet annihilation reactions of the lowest-lying triplet excited state in aluminum(III), silicon(IV), and metal-free phthalocyanines: medium and magnetic field effects on the rate of reaction". United States. doi:10.1021/j100400a036.
@article{osti_5681772,
title = {Excimer formation from triplet-triplet annihilation reactions of the lowest-lying triplet excited state in aluminum(III), silicon(IV), and metal-free phthalocyanines: medium and magnetic field effects on the rate of reaction},
author = {Frink, M E and Geiger, D K and Ferraudi, G J},
abstractNote = {The relaxation kinetics of aluminum(III), silicon(IV), and metal-free phthalocyanine (PcH/sub 2/) have been investigated by both conventional and laser flash photolysis. The observed excited-state decay kinetics are shown to be controlled by the excited-state concentration, the nature of the solvent, and the presence of an external magnetic field. Triplet-triplet annihilation is shown to be a dominating factor in the excited-state scheme. The second-order deviations observed in the relaxation kinetics of the phthalocyanines under various conditions are discussed in terms of an excimer-((/sup 3/E/sub u/)Pc* + (/sup 3/E/sub u/)Pc* ..-->.. (/sup 1/A/sub 1g/) (Pc-Pc)*) mediated mechanism. 34 references, 5 figures, 2 tables.},
doi = {10.1021/j100400a036},
journal = {J. Phys. Chem.; (United States)},
number = ,
volume = 90:9,
place = {United States},
year = {1986},
month = {4}
}