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Issue 28, 2015
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Vanadium[ethyl tricyanoethylene carboxylate]x: a new organic-based magnet

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Abstract

We present the synthesis of a new high Curie temperature (Tc ∼ 145 K) organic-based magnet with composition V[ETCEC]1.3·0.3 CH2Cl2 formed by the reaction of ethyl tricyanoethylenecarboxylate (ETCEC) with V(CO)6 in CH2Cl2. Analysis of the IR spectrum indicates that all nitrile and carbonyl oxygen are coordinated to V(II) sites. Temperature-, field-, and frequency-dependent measurements of the magnetization reveal complex magnetic behavior with a magnetic transition into a more disordered state. Application of the random anisotropy model (RMA) shows that this disordered state is different from the correlated spin glass (CSG) phase observed in analogous organic-based magnets V[MeTCEC]x and V[TCNE]x synthesized in CH2Cl2. This suggests that V[ETCEC]x is less disordered than its analogues, which can be attributed to the slower reaction rate. This result provides a new partner to MeTCEC and TCNE based materials for the exploration of all-organic magnetic heterostructures.

Graphical abstract: Vanadium[ethyl tricyanoethylene carboxylate]x: a new organic-based magnet

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Publication details

The article was received on 11 May 2015, accepted on 17 Jun 2015 and first published on 18 Jun 2015


Article type: Paper
DOI: 10.1039/C5TC01330E
Citation: J. Mater. Chem. C, 2015,3, 7363-7369
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    Vanadium[ethyl tricyanoethylene carboxylate]x: a new organic-based magnet

    Y. Lu, H. Yu, M. Harberts, A. J. Epstein and E. Johnston-Halperin, J. Mater. Chem. C, 2015, 3, 7363
    DOI: 10.1039/C5TC01330E

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