Literature DB >> 22051981

Interaction of CdTe quantum dots with 2,2-diphenyl-1-picrylhydrazyl free radical: a spectroscopic, fluorimetric and kinetic study.

Oluwasesan Adegoke1, Wadzanai Chidawanyika, Tebello Nyokong.   

Abstract

The interaction of 2,2-diphenyl-1-picrylhydrazyl (DPPH(·) free radical with thiol-capped CdTe quantum dots (QDs) has been studied by UV-vis spectroscopy, steady state and time resolved fluorescence measurements. Addition of DPPH(·) radical to CdTe QDs resulted in fluorescence quenching. The interaction occurs through static quenching as this was confirmed by fluorescence lifetime measurements. Time course absorption studies indicates that DPPH(·) may be reduced by interaction with QDs to the substituted hydrazine form (2,2-diphenyl-1-picrylhydrazine) DPPH-H. The mechanism of fluorescence quenching of CdTe QDs by DPPH(·) is proposed.

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Year:  2011        PMID： 22051981     DOI： 10.1007/s10895-011-1012-2

Source DB:  PubMed          Journal:  J Fluoresc        ISSN： 1053-0509            Impact factor:   2.217


  20 in total

1.  Spectroscopic studies on the thermodynamics of L-cysteine capped CdSe/CdS quantum dots--BSA interactions.

Authors:  Ling Ding; P J Zhou; S Q Li; G Y Shi; T Zhong; M Wu
Journal:  J Fluoresc       Date:  2010-07-01       Impact factor: 2.217

Review 2.  Aqueous phase synthesis of CdTe quantum dots for biophotonics.

Authors:  Ken-Tye Yong; Wing-Cheung Law; Indrajit Roy; Zhu Jing; Huijie Huang; Mark T Swihart; Paras N Prasad
Journal:  J Biophotonics       Date:  2010-09-28       Impact factor: 3.207

3.  Photoactivated luminescent CdSe quantum dots as sensitive cyanide probes in aqueous solutions.

Authors:  Wei Jun Jin; Maria T Fernandez-Arguelles; Jose M Costa-Fernandez; Rosario Pereiro; Alfredo Sanz-Medel
Journal:  Chem Commun (Camb)       Date:  2005-01-04       Impact factor: 6.222

4.  Modification of spontaneous emission from CdSe/CdS quantum dots in the presence of a semiconductor interface.

Authors:  Jia-Yu Zhang; Xiao-Yong Wang; Min Xiao
Journal:  Opt Lett       Date:  2002-07-15       Impact factor: 3.776

5.  Free radical sensor based on CdSe quantum dots with added 4-amino-2,2,6,6-tetramethylpiperidine oxide functionality.

Authors:  Vincent Maurel; Marie Laferrière; Paul Billone; Robert Godin; J C Scaiano
Journal:  J Phys Chem B       Date:  2006-08-24       Impact factor: 2.991

6.  Preparation of Au/TiO2 nanocomposites and their catalytic activity for DPPH radical scavenging reaction.

Authors:  Ryoko Isono; Tomokazu Yoshimura; Kunio Esumi
Journal:  J Colloid Interface Sci       Date:  2005-08-01       Impact factor: 8.128

7.  A potential visual fluorescence probe for ultratrace arsenic (III) detection by using glutathione-capped CdTe quantum dots.

Authors:  Xianxiang Wang; Yi Lv; Xiandeng Hou
Journal:  Talanta       Date:  2011-01-15       Impact factor: 6.057

8.  Studying the interaction between CdTe quantum dots and Nile blue by absorption, fluorescence and resonance Rayleigh scattering spectra.

Authors:  Juan-Juan Peng; Shao-Pu Liu; Lei Wang; You-Qiu He
Journal:  Spectrochim Acta A Mol Biomol Spectrosc       Date:  2010-02-24       Impact factor: 4.098

9.  Investigations on the photoinduced interaction of water soluble thioglycolic acid (TGA) capped CdTe quantum dots with certain porphyrins.

Authors:  M Asha Jhonsi; R Renganathan
Journal:  J Colloid Interface Sci       Date:  2010-01-18       Impact factor: 8.128

10.  Quantum dot fluorescence quenching pathways with Cr(III) complexes. photosensitized NO production from trans-Cr(cyclam)(ONO)2+.

Authors:  Daniel Neuman; Alexis D Ostrowski; Alexander A Mikhailovsky; Ryan O Absalonson; Geoffrey F Strouse; Peter C Ford
Journal:  J Am Chem Soc       Date:  2007-12-13       Impact factor: 15.419
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  1 in total

1.  Interaction of Graphene Quantum Dots with 4-Acetamido-2,2,6,6-Tetramethylpiperidine-Oxyl Free Radicals: A Spectroscopic and Fluorimetric Study.

Authors:  Ojodomo J Achadu; Tebello Nyokong
Journal:  J Fluoresc       Date:  2015-11-09       Impact factor: 2.217
  1 in total

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