Photoinduced interaction between MPA capped CdTe QDs and certain anthraquinone dyes

被引：48

作者：

Jagadeeswari, S. ^{[1
]}

Jhonsi, M. Asha ^{[1
]}

Kathiravan, A. ^{[1
]}

Renganathan, R. ^{[1
]}

机构：

[1] Bharathidasan Univ, Sch Chem, Tiruchirappalli 620024, Tamil Nadu, India

来源：

JOURNAL OF LUMINESCENCE | 2011年 / 131卷 / 04期

关键词：

MPA-CdTe QDs; Anthraquinone dyes; Fluorescence quenching; Electron transfer; ELECTRON-TRANSFER REACTIONS; QUANTUM DOTS; CHARGE SEPARATION; STEADY-STATE; WATER; FLUORESCENCE; PORPHYRIN; NANOCRYSTALS; PROBES; ION;

D O I：

10.1016/j.jlumin.2010.10.037

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Photoinduced interaction of mercapto propionic acid (MPA) capped CdTe quantum dots (QDs) with certain anthraquinone dyes namely alizarin, alizarin red S, acid blue 129 and uniblue has been studied by steady state and time resolved fluorescence measurements. Addition of anthraquinone dyes to CdTe QDs results in the reduction of electron hole recombination has been observed (i.e., fluorescence quenching). The Stern-Volmer constant (K-SV), quenching rate constant (k(q)) and association constants (K) were obtained from fluorescence quenching data. The interaction of anthraquinone dyes with QDs occurs through static quenching was confirmed by unaltered fluorescence lifetime. The occurrence of electron transfer quenching mechanism has been proved by the negative free energy change (Delta G(et)) obtained as per the Rehm-Weller equation. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：597 / 602

页数：6

共 47 条

[1] Perspectives on the physical chemistry of semiconductor nanocrystals [J].

Alivisatos, AP .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (31) :13226-13239

[2] Semiconductor clusters, nanocrystals, and quantum dots [J].

Alivisatos, AP .

SCIENCE, 1996, 271 (5251) :933-937

[3] Electrochemistry and electrogenerated chemiluminescence of CdTe nanoparticles [J].

Bae, Y ;

Myung, N ;

Bard, AJ .

NANO LETTERS, 2004, 4 (06) :1153-1161

[4]

Balzani V., 2003, Molecular Devices and Machines, a Journey into the Nanoworld

[5] A SPECTROPHOTOMETRIC INVESTIGATION OF THE INTERACTION OF IODINE WITH AROMATIC HYDROCARBONS [J].

BENESI, HA ;

HILDEBRAND, JH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1949, 71 (08) :2703-2707

[6] Detailed spectroscopic investigations to reveal the nature of interaction of anionic porphyrin with calf thymus DNA [J].

Bhattacharya, Sudeshna ;

Mandal, Gopa ;

Ganguly, Tapan .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY, 2010, 101 (01) :89-96

[7] Semiconductor nanocrystals as fluorescent biological labels [J].

Bruchez, M ;

Moronne, M ;

Gin, P ;

Weiss, S ;

Alivisatos, AP .

SCIENCE, 1998, 281 (5385) :2013-2016

[8] A SIMPLE-MODEL FOR THE IONIZATION-POTENTIAL, ELECTRON-AFFINITY, AND AQUEOUS REDOX POTENTIALS OF SMALL SEMICONDUCTOR CRYSTALLITES [J].

BRUS, LE .

JOURNAL OF CHEMICAL PHYSICS, 1983, 79 (11) :5566-5571

[9] Supramolecular interactions of meso-tetra-2-chlorophenylporphyrin with fullerenes: A luminescence study [J].

Chaudhuri, Tandrima ;

Nath, Sukhendu ;

Chattopadhyay, Subrata ;

Banerjee, Manas ;

Nayak, Sandip K. .

JOURNAL OF LUMINESCENCE, 2010, 130 (03) :507-511

[10] Magnetic microstructure of magnetotactic bacteria by electron holography [J].

Dunin-Borkowski, RE ;

McCartney, MR ;

Frankel, RB ;

Bazylinski, DA ;

Posfai, M ;

Buseck, PR .

SCIENCE, 1998, 282 (5395) :1868-1870

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