Photostable chlorophyll a conjugated with poly(vinylpyrrolidone)-smectite catalyzes photoreduction and hydrogen gas evolution by visible light.
Chlorophyll a was adsorbed to a synthetic smectite intercalated by poly(vinylpyrrolidone) (PVP) to form the chlorophyll-PVP-smectite conjugate (Chl-PVP-SME) having an absorption maximum at 677 nm. The conjugate was found to be stable toward light illumination in comparison with chlorophyll-smectite, chlorophyll-PVP, and free chlorophyll a. Chl-PVP-SME had a photoinduced activity for catalyzing the reduction of methyl viologen. Furthermore, the evolution of hydrogen gas was observed when an aqueous suspension containing Chl-PVP-SME, methyl viologen (an electron carrier), 2-mercaptoethanol (an electron donor), and hydrogenase was illuminated by visible light.
Itoh
T
T
Toin Human Science and Technology Center, Department of Materials Science and Technology, Toin University of Yokohama, Japan.
Ishii
A
A
Kodera
Y
Y
Matsushima
A
A
Hiroto
M
M
Nishimura
H
H
Tsuzuki
T
T
Kamachi
T
T
Okura
I
I
Inada
Y
Y
D001426:Bacterial Proteins; D002384:Catalysis; D002734:Chlorophyll / Q000737:chemistry*; D000077194:Chlorophyll A; D016969:Desulfovibrio vulgaris / Q000201:enzymology; D004579:Electron Transport / Q000502:physiology; D005765:Gastrointestinal Agents / Q000737:chemistry*; D006859:Hydrogen / Q000378:metabolism*; D006864:Hydrogenase / Q000378:metabolism; D008027:Light; D010269:Paraquat / Q000378:metabolism; D011205:Povidone / Q000737:chemistry*; D017640:Silicates; D013053:Spectrophotometry; D053545:Spirulina
D001426:Bacterial Proteins; D005765:Gastrointestinal Agents; D017640:Silicates; D002734:Chlorophyll; D006859:Hydrogen; C033214:Smectite; D006864:Hydrogenase; D011205:Povidone; D010269:Paraquat; D000077194:Chlorophyll A