Hyperfine Interactions

, 238:60 | Cite as

57Fe Mössbauer spectroscopy study of a 2D spin transition coordination polymer built from a tris-1R-tetrazole ligand

  • N. N. Adarsh
  • Marinela M. Dîrtu
  • Aurelian Rotaru
  • Yann Garcia
Article
Part of the following topical collections:
  1. Proceedings of the 3rd Mediterranean Conference on the Applications of the Mössbauer Effect (MECAME 2017), Jerusalem, Israel, 5-7 June 2017

Abstract

[Fe{N(entz)3}2](ClO4)2 (N(entz)3 = tris(2-(1H-tetrazol-1-yl)ethyl)-amine) is a 2D FeII coordination polymer built from a tris-1-R tetrazole building block. This thermochromic FeII complex which was investigated by variable temperature 57Fe Mossbauer spectroscopy (78–300 K) displays on cooling a complete, abrupt and hysteretic spin transition at \(T_{c}^{\uparrow } = 170(1)\) K and \(T_{c}^{\downarrow } = 149(1)\) K. The reversibility of the spin transition over several thermal cycles was deduced from SQUID magnetometry. Differential scanning calorimetry reveals a reversible first order phase transition on cooling below room temperature, with entropy data consistent with the highly cooperative character of the spin transition.

Keywords

57Fe Mossbauer spectroscopy Coordination polymers Spin transition Tetrazole Molecular bistability 

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Institute of Condensed Matter and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST)Université catholique de LouvainLouvain-la-NeuveBelgium
  2. 2.Department of Electrical Engineering and Computer Science & Research Center MANSiD“Stefan cel Mare” UniversitySuceavaRomania

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