Effect of ionic polymer environment on the photoinduced electron transfer from zinc porphyrin to viologen

Abstract. Formation of ultrasmall particles of Pbl z in methanol was observed by means of stroboscopic stopped-flow spectroscopy. Pulse-laser induced electron transfer from Pbl z' Hgl., and Hil 3 to viologens was measured for various laser intensities and for various viologen concentrations. The electron transfer yields were 0.24, 0.08, and 0.03 for Hgl., Pbl., and Hi1 3 , respectively. The laser-intensity dependence differed from the previous observation for CdS and showed that the low yield is not attributable to the direct electron-hole recombination in the particle.

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Formation and Photoreaction of PbI₂, HgI₂, and BiI₃ Layered Ultrasmall Particles

Nosaka

Fukuyama

Horiuchi

et al. 1993

Israel Journal of Chemistry

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Diquaternary Salts of 4,4′‐Bipyridine as Electron Relays for the Photoreduction of Water

Summers

1991

Journal of Heterocyclic Chem

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Polymer‐bound porphyrins and their precursors, 10. Syntheses and photoredox properties of water‐soluble polymers with covalently bonded zinc tetraphenylporphyrin

1991

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Positively or negatively charged as well as uncharged water-soluble polymers 2a-d, 6a-c, 7a-e and positively charged crosslinked polymers 3a, b containing covalently bonded moieties of the substituted zinc tetraphenylporphyrin 1 a were prepared. In addition, positively charged polymers 4a-c with covalently bonded viologen, and 5 with covalently bonded 1 a and viologen at one and the same polymer chain were obtained. The triplet lifetimes in water of different l abonded linear polymers 2a-d, 6a-c, and 7a-e are not influenced by the kind of polymer environment. The photoredox activities in water of the polymers containing moieties of 1 a in the presence of methylviologen and 2-mercaptoethanol under irradiation with visible light are higher as compared with low-molecular-weight, positively or negatively charged porphyrins 1 b, c. The influence of the amount of polymer-bonded porphyrin and the molecular weight of a polymer on the photoredox activity is exemplarily described. Polymers 4a-c with viologen moieties as acceptor are more efficient than the low-moleular-weight methylviologen. The highest photoredox activities were observed with polymer 5 containing moieties of 1 a and viologen. In the presence of the enzyme hydrogenase formation of hydrogen occurs. 0 1991, Hiithig & Wepf Verlag, Basel CCC 0025-1 16X/91/$03.00

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Effect of ionic polymer environment on the photoinduced electron transfer from zinc porphyrin to viologen

Cited by 8 publications

References 5 publications

Formation and Photoreaction of PbI₂, HgI₂, and BiI₃ Layered Ultrasmall Particles

Formation and Photoreaction of PbI₂, HgI₂, and BiI₃ Layered Ultrasmall Particles

Diquaternary Salts of 4,4′‐Bipyridine as Electron Relays for the Photoreduction of Water

Polymer‐bound porphyrins and their precursors, 10. Syntheses and photoredox properties of water‐soluble polymers with covalently bonded zinc tetraphenylporphyrin

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Effect of ionic polymer environment on the photoinduced electron transfer from zinc porphyrin to viologen

Cited by 8 publications

References 5 publications

Formation and Photoreaction of PbI2, HgI2, and BiI3 Layered Ultrasmall Particles

Formation and Photoreaction of PbI2, HgI2, and BiI3 Layered Ultrasmall Particles

Diquaternary Salts of 4,4′‐Bipyridine as Electron Relays for the Photoreduction of Water

Polymer‐bound porphyrins and their precursors, 10. Syntheses and photoredox properties of water‐soluble polymers with covalently bonded zinc tetraphenylporphyrin

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Product

Resources

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Formation and Photoreaction of PbI₂, HgI₂, and BiI₃ Layered Ultrasmall Particles

Formation and Photoreaction of PbI₂, HgI₂, and BiI₃ Layered Ultrasmall Particles