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PHOTOPRODUCTION OF HYDROGEN FROM LINKED CHROMOPHORES
Author(s) -
CREASER I. I.,
HAMMERSHØI A.,
LAUNIKONIS A.,
MAU A. W.H.,
SARGESON A. M.,
SASSE W. H. F.
Publication year - 1989
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1989.tb04071.x
Subject(s) - chromophore , chemistry , photochemistry , anthracene , cobalt , moiety , intramolecular force , excited state , ethylenediaminetetraacetic acid , reactivity (psychology) , singlet state , electron transfer , electron donor , fluorescence , catalysis , stereochemistry , inorganic chemistry , organic chemistry , chelation , medicine , physics , alternative medicine , pathology , quantum mechanics , nuclear physics
On irradiation of solutions of anthryl‐substituted cobalt(III) cage complexes, [(l‐(anthryl‐9‐methylamino)‐8‐methyl‐3,6,10,13,16,19‐hexaazabicyclo [6.6.6] eicosane) cobalt(III)] 3+ or [(l‐(4‐an‐thryl‐9)‐3‐aza‐butyl‐l‐amino)‐8‐methyl‐3,6,10,13,16,19‐hexaazabicyclo [6.6.6] eicosane)cobalt (III)] 3 * in the presence of ethylenediaminetetraacetic acid and platinum catalysts hydrogen was produced. These complexes act as coupled photosensitizers (anthracene moiety) and electron relays (cobalt cage) to produce H 2 via energy trapping and intramolecular electron transfer initially. The intensity of fluorescence and the photochemical reactivity favour the latter complex and the excited singlet state of the anthracene chromophore is invoked as the intermediate state leading to the reduction of Co(III) to Co(II).