Photodissociation of Nitric Oxide from Nitrosyl Metalloporphyrins in Micellar Solutions

Autor:	Hirotaka Sonoki, Masanobu Wakasa, Haruna Adachi, Mikio Hoshino, Yoshio Miyazaki, Hisaharu Hayashi
Rok vydání:	2000
Předmět:	Reaction mechanism Reaction rate constant Chemistry Photodissociation Micellar solutions Aqueous two-phase system Ionic bonding Molecule Physical and Theoretical Chemistry Photochemistry Micelle
Zdroj:	The Journal of Physical Chemistry A. 105:392-398
ISSN:	1520-5215 1089-5639
DOI:	10.1021/jp002515i
Popis:	rate constants kFeNO(pseudo) and kCoNO(pseudo), respectively. It is found that kFeNO(pseudo) > kFeNO(second) and kCoNO(pseudo) > kCoNO(second). The differences between kMNO(pseudo) and kMNO(second) observed for Fe II Hem and Co II OEP are interpreted by assuming that (1) NO molecules in the micellar solutions are dissolved in both micelles and the aqueous phase and (2) NO molecules trapped in micelles hardly react with MP because of the electrostatic repulsion between ionic micelles. In the case of Mn II TPP, the pseudo-first-order rate constant, kMn, is found to asymptotically increase with an increase in [NO] to a limiting value. The reaction mechanisms for the nitrosylation of MP in micellar solutions are discussed in detail on the basis of the kinetic studies.
Databáze:	OpenAIRE
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