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Catalytic and SERS Activities of Tryptophan‐EDTA Capped Silver Nanoparticles
Author(s) -
Mondal Sudipta,
Verma Sandeep
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201400056
Subject(s) - ethylenediaminetetraacetic acid , silver nanoparticle , chemistry , silver nitrate , conjugate , biomolecule , catalysis , tryptophan , aqueous solution , nanoparticle , nuclear chemistry , chelation , inorganic chemistry , nanotechnology , organic chemistry , materials science , amino acid , biochemistry , mathematical analysis , mathematics
Abstract This report describes the synthesis of silver nanoparticles (AgNPs) by in situ reduction of silver nitrate with designed ethylenediaminetetraacetic acid‐tryptophan bioconjugates. Conjugation of EDTA was chosen to augment water solubility of resulting conjugate, which in turn facilitates synthesis of AgNPs in aqueous medium. Various spectroscopic and microscopy techniques were employed to characterize the EDTA‐tryptophan capped AgNPs. The nanoparticles show excellent catalytic activity towards reduction of p ‐nitrophenol to p ‐aminophenol with a rate constant of 16.43 × 10 –2 min –1 . In addition, as‐synthesized AgNPs show high SERS activity, which was used for low concentration detection of biomolecules.