THE DIMERISATION OF PHTHALOCYANINES

Authors: Phillips, David; Dhami, Suman; Ostler, Richard; Petrasek, Zdenek

Source: Progress in Reaction Kinetics and Mechanism, Volume 28, Number 4, 2003 , pp. 299-420(122)

Publisher: Science Reviews 2000 Ltd

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Abstract:

In this review, we have shown that the dimerisation of phthalocyanine compounds, notably here the sulphonated aluminium phthalocyanines, is dependent upon concentration, on the medium in which the dye is dissolved, and upon pH. Complex equilibria between various monomer and dimer species are observed as a function of pH, and the probable structures of the dimers elucidated by semi-empirical and ab initio calculations. The formation of a red-shifted dimer leads to the quenching of monomer singlet state in concentrated solution, in reverse micelles, and in lipid vesicles, and this behaviour can account for the fluorescence intensity distributions and decay characteristics of phthalocyanine dyes in living cells as a function of irradiation time.

Document Type: Regular paper

DOI: http://dx.doi.org/10.3184/007967403322807390

Publication date: 2003-12-01

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Progress in Reaction Kinetics & Mechanism is an international journal for the quarterly publication of both in-depth reviews and research articles.
In-depth reviews are comprehensive accounts bringing together work from many sources with the aim of providing an article of lasting value that will become established as the reference source in the particular subject. Research articles, on the other hand, normally focus on a relatively new or recently developed field or technique giving a state-of-the-art account of the subject and may well refer to a narrower range of existing work. It covers the fields of kinetics and mechanisms of chemical processes in the gas phase and solution of both simple and complex systems.
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