title: Singlet oxygen chemistry in water: a porous vycor glass-supported photosensitizer.
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.
authors.affiliation: Department of Chemistry and Graduate Center, City University of New York, Brooklyn College, Brooklyn, New York 11210, USA.
authors.forename: David
authors.initials: D
authors.lastname: Aebisher
authors.forename: Nikolay S
authors.initials: NS
authors.lastname: Azar
authors.forename: Matibur
authors.initials: M
authors.lastname: Zamadar
authors.forename: Naveen
authors.initials: N
authors.lastname: Gandra
authors.forename: Harry D
authors.initials: HD
authors.lastname: Gafney
authors.forename: Ruomei
authors.initials: R
authors.lastname: Gao
authors.forename: Alexander
authors.initials: A
authors.lastname: Greer
mesh_terms: D005898:Glass; D010545:Peroxides; D010777:Photochemistry; D017319:Photosensitizing Agents / Q000737:chemistry*; D026082:Singlet Oxygen / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D010545:Peroxides; D017319:Photosensitizing Agents; D014867:Water; D026082:Singlet Oxygen