Publications

Synthesis and size-dependent spin crossover of coordination polymer [Fe(Htrz)<sub>2</sub>(trz)](BF<sub>4</sub>)

Author(s)
Shiraz Ahmed Siddiqui, Oleg Domanov, Erhard Schafler, Jana Vejpravova, Hidetsugu Shiozawa
Abstract

Synthesis of quality single crystals is central to materials chemistry for optical, magnetic and electronic device applications. The present work reports on synthesis of single crystals of iron-triazole coordination polymer [Fe(Htrz)2(trz)](BF4) where (Htrz)=1H-1,2,4-triazole. The crystal size as long as 40mm is well controlled with the temperature, precursor concentration and solvent type. It is found that its thermal spin crossover depends largely on the crystal size. Fine crystals are ideal for depositing a thin film that exhibits a redox activity. The largest crystals allows reliable electrical conductance measurements that reveal two different activation energies at the low spin state and the high spin state, which are one order of magnitude smaller than the electronic gaps calculated based on the density functional theory. The synthetic route sought in the present study is applicable to other coordination polymers and related materials and provides the basis for their applications.

Organisation(s)
Electronic Properties of Materials, Dynamics of Condensed Systems
External organisation(s)
Charles University Prague, Czech Academy of Sciences
Journal
Journal of Materials Chemistry C
Volume
9
Pages
1077-1084
No. of pages
8
ISSN
2050-7526
DOI
https://doi.org/10.1039/D0TC03878D
Publication date
12-2020
Peer reviewed
Yes
Austrian Fields of Science 2012
103015 Condensed matter, 104011 Materials chemistry
Portal url
https://ucris.univie.ac.at/portal/en/publications/synthesis-and-sizedependent-spin-crossover-of-coordination-polymer-fehtrz2trzbf4(361f1b22-4fc6-48fc-8232-be98a7499222).html