Emergence of Multicolor Photoluminescence in La0.67Sr0.33MnO3 Nanoparticles

被引：36

作者：

Giri, Anupam ^{[1
]}

Goswami, Nirmal ^{[1
]}

Bootharaju, M. S. ^{[2
]}

Xavier, Paulrajpillai Lourdu ^{[2
]}

John, Robin ^{[2
]}

Thanh, Nguyen T. K. ^{[3
,4
]}

Pradeep, Thalappil ^{[2
]}

Ghosh, Barnali ^{[1
]}

Raychaudhuri, A. K. ^{[1
]}

Pal, Samir Kumar ^{[1
]}

机构：

[1] SN Bose Natl Ctr Basic Sci, Unit Nano Sci & Technol, Kolhapur 700098, Maharashtra, India

[2] Indian Inst Technol, Dept Chem, Madras 600036, Tamil Nadu, India

[3] UCL, Dept Phys & Astron, London WC1E 6BT, England

[4] Royal Inst Great Britain, Davy Faraday Res Lab, London W1S 4BS, England

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 48期

关键词：

MANGANESE; REDUCTION; CHEMISTRY; OXIDATION; RAMAN;

D O I：

10.1021/jp308606a

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：

Herein, we report the emergence of multicolor photoluminescence in a mixed-valence manganite nanoparticle La0.67Sr0.33MnO3 (LSMO NP) achieved through electronic structural modification of the nanoparticles upon functionalization with a biocompatible organic ligand, sodium tartrate. From UV-vis absorption, X-ray photoelectron spectroscopy (XPS), time-resolved photoluminescence study, and Raman spectroscopic measurements, it is revealed that ligand-to-metal charge transfer transitions from highest occupied molecular orbital (HOMO, centered in tartrate ligand) to lowest unoccupied molecular orbital (LUMO, centered in Mn3+/4+ of the NPs), and d-d transitions involving Jahn-Teller sensitive Mn3+ ions in the NPs plays the central role behind the origin of multiple photoluminescence from the ligand functionalized LSMO NPs.

引用

页码：25623 / 25629

页数：7

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