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Issue 20, 2016
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A novel blue luminescent material Na2[Co(C2O4)2(H2O)2]·6H2O: synthesis, structure, luminescence and magnetic properties

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Abstract

The synthesis, crystal structure and physical properties of new disodium trans-diaquabis(oxalato)cobaltate(II)hexahydrate {Na2[Co(C2O4)2(H2O)2]·6H2O} crystals have been investigated. Single crystal X-ray analysis reveals that this compound crystallizes in the triclinic system with the space group P[1 with combining macron]. The structure of this complex consists of [Co(C2O4)2(H2O)2]2− anionic units with a slightly distorted octahedral geometry of cobalt surrounded by four oxygen atoms of two oxalate groups. The anionic units are interlinked by two Na+ ions with different octahedral and distorted octahedral environments. The electronic absorption spectra of the compound exhibit bands at 208, 246 and 526 nm in the UV and visible regions. A strong blue luminescence was observed at room temperature when excited at 355 nm. The M(H) curve at 2 K shows a significant nonlinear behaviour with almost zero coercivity which clearly indicates an extremely weak antiferromagnetic/ferromagnetic state of the complex.

Graphical abstract: A novel blue luminescent material Na2[Co(C2O4)2(H2O)2]·6H2O: synthesis, structure, luminescence and magnetic properties

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Article information


Submitted
27 Mar 2016
Accepted
10 Apr 2016
First published
12 Apr 2016

Dalton Trans., 2016,45, 8500-8505
Article type
Paper

A novel blue luminescent material Na2[Co(C2O4)2(H2O)2]·6H2O: synthesis, structure, luminescence and magnetic properties

A. Saritha, B. Raju, M. Narsimhulu, D. N. Rao, P. Raghavaiah and K. A. Hussain, Dalton Trans., 2016, 45, 8500
DOI: 10.1039/C6DT01185C

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