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Issue 46, 2016, Issue in Progress
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Imparting hysteretic behavior to spin transition in neutral mononuclear complexes

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Abstract

A series of spin transition neutral compounds [FeL(NCS)2] has been synthesized and characterized by means of magnetic susceptibility studies, X-ray diffraction, IR and Mössbauer spectroscopic, and calorimetric measurements (L = N,N-bis((3-alkoxypyridin-2-yl)methylene)-propane-1,3-diamine, number of carbon atoms in chains (n) = 4, 12, 14, 16, 18, 20). The shortest chain compound is crystalline and displays a gradual spin transition above ambient temperature. Growing the aliphatic substituent up to n = 12 and 14 leads to loss of crystalline order and deterioration of magnetic properties. At the critical chain length n = 16 and above, the compounds undergo a phase transition reflected by a spin transition and resulting in the appearance of susceptibility hysteresis initially not observed for the short chain congener. For the compound with n = 20, hysteresis becomes the most pronounced. The study shows the importance of chain length optimization for effective feedback between phase and spin transitions.

Graphical abstract: Imparting hysteretic behavior to spin transition in neutral mononuclear complexes

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Publication details

The article was received on 29 Feb 2016, accepted on 11 Apr 2016 and first published on 20 Apr 2016


Article type: Paper
DOI: 10.1039/C6RA05342D
RSC Adv., 2016,6, 39627-39635

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    Imparting hysteretic behavior to spin transition in neutral mononuclear complexes

    M. Seredyuk, K. Znovjyak, M. C. Muñoz, Y. Galyametdinov, I. O. Fritsky and J. A. Real, RSC Adv., 2016, 6, 39627
    DOI: 10.1039/C6RA05342D

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