Observation of bright green luminescence in an Eu2+ complexed graphene oxide composite through reduction of Eu3+

Uttam Kumar Ghorai; Rajarshi Roy; Nilesh Mazumder; Subhajit Saha; Swati Das; Kalyan K. Chattopadhyay

doi:10.1039/C4NJ02323D

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Observation of bright green luminescence in an Eu²⁺ complexed graphene oxide composite through reduction of Eu³⁺†

Uttam Kumar Ghorai,^a Rajarshi Roy,^b Nilesh Mazumder,^b Subhajit Saha,^a Swati Das^b and Kalyan K. Chattopadhyay*^ab

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* Corresponding authors

^a School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700 032, India
E-mail: kalyan_chattopadhyay@yahoo.com

^b Thin Film & Nanoscience Laboratory, Department of Physics, Jadavpur University, Kolkata 700 032, India

Abstract

Red light harvesting with Eu³⁺ graphene complexes are well known in the literature. But embedding Eu²⁺ in a graphene oxide matrix is a difficult proposition and could be of paramount interest because of emission tunability. Herein, we report the observation of highly visible green luminescence for Eu²⁺ which occurs due to the transition between the 4f⁷ (8S_7/2) ground state and the 4f⁶ 5d excited state with nanosecond time decay through reduction of Eu³⁺ using a simple chemical approach. This newly formed luminescence complex may be used as a major potential candidate for application in optoelectronics and nanobiotechnology.

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Article information

DOI: https://doi.org/10.1039/C4NJ02323D
Article type: Letter
Submitted: 17 Dec 2014
Accepted: 16 Mar 2015
First published: 17 Mar 2015

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New J. Chem., 2015,39, 4210-4213

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Observation of bright green luminescence in an Eu²⁺ complexed graphene oxide composite through reduction of Eu³⁺

U. K. Ghorai, R. Roy, N. Mazumder, S. Saha, S. Das and K. K. Chattopadhyay, New J. Chem., 2015, 39, 4210 DOI: 10.1039/C4NJ02323D

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