Photocatalytic reduction of nicotinamide coenzymes in the presence of titanium dioxide: The influence of aliphatic aminoacids

被引：5

作者：

Bojarska, E ^{[1
]}

Pawlicki, K ^{[1
]}

Czochralska, B ^{[1
]}

机构：

[1] UNIV WARSAW, INST EXPT PHYS,DEPT BIOPHYS, PL-02089 WARSAW, POLAND

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1997年 / 108卷 / 2-3期

关键词：

nicotinamide coenzymes; titanium dioxide; aminoacids;

D O I：

10.1016/S1010-6030(97)00075-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Illumination of a TiO2 dispersion in a weakly alkaline solutions of nicotinamide coenzymes (NMN+, NAD(+), NADP(+)) leads in the presence of aminoacids (glycine, lysine, serine and aspargine as well as EDTA and DTT) to one-electron reduction of the coenzymes. The formation of the respective dimers observed in the initial stage of illumination at 365 nm was confirmed by polarographic, spectrophotometric and enzymatic analysis. The relative efficiency of photoreduction strongly depends on the nature of the electron donor. Effects of pH and coenzyme concentration on the efficiency of photoconversion process were investigated. Prolonged irradiation leads to tetrahydroderivatives and/or hydration products of the respective dimers. (C) 1997 Elsevier Science S.A.

引用

页码：207 / 213

页数：7

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