@article {6754, title = {CHARGE EFFECTS ON THE PHOTOCHEMISTRY OF THE CO(EDTA) .1. SYSTEM IN THE PRESENCE OF POLYAMMONIUM MACROCYCLIC RECEPTORS}, journal = {Inorganica Chimica Acta}, volume = {195}, year = {1992}, note = {

ISI Document Delivery No.: JF612Times Cited: 1
Cited Reference Count: 15
Pina, f parola, aj bencini, a micheloni, m manfrin, mf moggi, l
Pina, Fernando/C-8161-2011; Parola, A. Jorge/F-4048-2010
Parola, A. Jorge/0000-0002-1333-9076
Elsevier science sa lausanne
Lausanne 1

}, month = {1992}, pages = {139-143}, abstract = {

The effects of polyammonium macrocycles on the spectroscopic and photochemical properties of the Co(EDTA)- . I- ion-pair have been investigated. The addition of a macrocycle to aqueous solutions containing Co(EDTA)- and I- causes an increase of the absorbance in the region of the ion-pair charge-transfer band, as well as an increase of the quantum yield for the intramolecular photooxidation reduction of the ion-pair. Both these effects are mainly, if not only, due to an increase of the association constant between Co(EDTA)- and I-, caused by the positive charge of the macrocycle bound to the complex. On the contrary no change was observed on the intrinsic photoreactivity of the excited ion-pair. This last result is discussed in comparison with the effects already observed on the ligand photodissociation of MC excited states of Co(III) cyanide complexes.

}, isbn = {0020-1693}, url = {://WOS:A1992JF61200004}, author = {Pina, F and A. J. Parola and Bencini, A and Micheloni, M. and Manfrin, M. F. and Moggi, L.} }