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Titolo:
Dimerization, J-aggregation and J-disaggregation dynamics of indocyanine green in heavy water
Autore:
Mauerer, M; Penzkofer, A; Zweck, J;
Indirizzi:
Univ Regensburg, Inst Expt & Angew Phys 2, D-93040 Regensburg, Germany Univ Regensburg Regensburg Germany D-93040 , D-93040 Regensburg, Germany
Titolo Testata:
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
fascicolo: 1, volume: 47, anno: 1998,
pagine: 68 - 73
SICI:
1011-1344(199811)47:1<68:DJAJDO>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
ABSORPTION;
Keywords:
dimerization; dimerization constant; J-aggregates; indocyanine green; solvent isotope effect; deuterium oxide; heavy water; activation energy of aggregation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Penzkofer, A Univ Regensburg, Inst Expt & Angew Phys 2, D-93040 Regensburg, Germany Univ Regensburg Regensburg Germany D-93040 ensburg, Germany
Citazione:
M. Mauerer et al., "Dimerization, J-aggregation and J-disaggregation dynamics of indocyanine green in heavy water", J PHOTOCH B, 47(1), 1998, pp. 68-73

Abstract

The dimerization constant of freshly prepared samples of indocyanine greensodium iodide in D2O is determined by an analysis of the concentration-dependent absorption behaviour. At high concentrations J-aggregates are formedin due time by heat treatment. The activation energy of molecule attachment to J-aggregates is determined by analysing the temperature dependence of the rate of J-aggregate growth. The activation energy of molecule detachment from J-aggregates is deduced from measurements of the temperature-dependent rate of J-aggregate absorption decrease after strong dilution. Compared to indocyanine green sodium iodide in water, the dimerization constant is reduced, and the rates of J-aggregate formation at high concentration and ofmolecule detachment from J-aggregates at low concentration are slowed down. (C) 1998 Elsevier Science S.A. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 19:50:16