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  • Title: Singlet oxygen chemistry in water: a porous vycor glass-supported photosensitizer.
    Author: Aebisher D, Azar NS, Zamadar M, Gandra N, Gafney HD, Gao R, Greer A.
    Journal: J Phys Chem B; 2008 Feb 21; 112(7):1913-7. PubMed ID: 18225891.
    Abstract:
    Singlet molecular oxygen [1O2 (1Deltag)] is generated cleanly in aqueous solution upon irradiation of a heterogeneous complex, meso-tetra(N-methyl-4-pyridyl)porphine (1) adsorbed onto porous Vycor glass (PVG). The cationic photosensitizer 1 tightly binds onto PVG and gives a stable material, which does not dissociate 1 into the surrounding aqueous phase. The production of 1O2 was measured by monitoring the time-resolved 1O2 (1Deltag) phosphorescence at 1270 nm. Indirect analysis of 1O2 generation was also carried out with the photooxidation of trans-2-methyl-2-pentenoate anion, which afforded the corresponding hydroperoxide. Sensitizer-1-impregnated PVG gives rise to a new singlet oxygen generator but more importantly provides a heterogeneous system for use in water.
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