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Sequential biphotonic processes in rhodium(III) phthalocyanines

Journal Article · · J. Phys. Chem.; (United States)
DOI:https://doi.org/10.1021/j150642a023· OSTI ID:7243814
Visible irradiations, lambda/sub excit/ = 640 or 590 nm, of rhodium(III) phthalocyanines with high photonic fluxes induce the same abstraction of hydrogen from solvent molecules that was previously reported for monophotonic ultraviolet photolysis. The dependence of the product yields on light intensity and complex concentration reveals that the visible photochemistry is associated with biphotonic processes. Indeed, no visible photochemistry was detected for low photonic fluxes. The direct observation of the low-lying /sup 3/..pi pi..* shows that the biphotonic photochemistry carries the excited molecules to the reactive n..pi..* state. A mechanism for the sequential biphotonic photochemistry of the phthalocyanines is discussed. 33 references, 4 figures, 2 tables.
Research Organization:
Univ. of Notre Dame, IN
OSTI ID:
7243814
Journal Information:
J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 87:24; ISSN JPCHA
Country of Publication:
United States
Language:
English