Issue 8, 2011
From the journal:

Nanoscale

Tunable fluorescence in chromophore-functionalized nanodiamond induced by energy transfer†

Urmimala Maitra,a   Ankit Jain,a   Subi J. George*a  and  C. N. R. Rao*ab  

* Corresponding authors

a New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bangalore, India
E-mail: cnrrao@jncasr.ac.in, george@jncasr.ac.in
Fax: +91-80-2208-2760

b International Centre for Materials Science (ICMS), CSIR Centre of Excellence in Chemistry, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bangalore, India

Abstract

Hybrid materials comprising diamond nanoparticles (ND) and oligo(phenylenevinylenes) (OPVs) have been synthesized by the covalent linking of acid-functionalized ND and OPV-amine. Chromophore-functionalized ND particles with long alkyl and π-conjugated groups are readily dispersed in various organic solvents without any precipitation after several hours. A careful study of the properties of the hybrid materials revealed an aggregation-induced energy transfer from the blue fluorescent nanodiamonds to green emitting OPVs. At very low concentrations the hybrid emits in the blue region, but as the concentration is increased a gradual transition from blue to green emission occurs. Competitive processes such as aggregation-induced enhanced emission and self-absorption have been ruled out and a molecular picture of the phenomenon is proposed. This strategy can open a plethora of new avenues for fluorescent nanodiamonds in optoelectronics and light harvesting apart from bio-imaging.

Graphical abstract: Tunable fluorescence in chromophore-functionalized nanodiamond induced by energy transfer

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Article information

DOI
https://doi.org/10.1039/C1NR10295H
Article type
Paper
Submitted
19 Mar 2011
Accepted
06 May 2011
First published
10 Jun 2011

Nanoscale, 2011,3, 3192-3197

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Tunable fluorescence in chromophore-functionalized nanodiamond induced by energy transfer

U. Maitra, A. Jain, S. J. George and C. N. R. Rao, Nanoscale, 2011, 3, 3192 DOI: 10.1039/C1NR10295H

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