Pd (core)-Au (shell) nanoparticles catalyzed conversion of NADH to NAD+ by UV-vis spectroscopy-A kinetic analysis

被引：20

作者：

Gopalan, A. ^{[1
]}

Ragupathy, D. ^{[1
]}

Kim, H-T. ^{[2
]}

Manesh, K. M. ^{[1
]}

Lee, K-P. ^{[1
,2
]}

机构：

[1] Kyungpook Natl Univ, Dept Chem, Grad Sch, Taegu, South Korea

[2] Kyungpook Natl Univ, Sch Elect & Elect Engn, Taegu, South Korea

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2009年 / 74卷 / 03期

关键词：

Nicotinamide adenine dinucleotide; Core-shell NPs; UV-vis spectroscopy; Kinetics; GOLD NANOPARTICLES; OXIDATION; PALLADIUM; ELECTRODE; PLATINUM; NANORODS; TITANIA; SIZE; FILM;

D O I：

10.1016/j.saa.2009.07.022

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Kinetics of I'd (core)-Au (shell) nanoparticles (NPs) catalyzed transformation of dihydronicotinamide adenine dinucleotide (NADH) to NAD(+) was monitored by UV-vis spectroscopy. Pd (core)-Au (shell) NPs were prepared by microwave irradiation method. High resolution transmission electron microscopy image reveals the core-shell morphology. X-ray diffraction pattern shows the presence of distinct crystalline domains for Pd and Au. The changes in absorbances at 340nm were followed for various time intervals. Rates of conversion of NADH to NAD(+) were determined for different conditions. The conversion of NADH to NAD(+) was to be first order with respect to NADH at lower concentrations (upto 0.04 mM) and pseudo-first-order beyond 0.04 mM. Rate constants for the Pd (core) Au-(shell) NPs catalyzed transformation of NADH to NAD(+) were deduced. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：678 / 684

页数：7

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