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