Evidence of Cooperative Effects for the Fe(phen)2(NCS)2 Spin Crossover Molecular Complex in Polyaniline Plus Iron Magnetite

Wai Kiat Chin; Binny Tamang; M. Zaid Zaz; Arjun Subedi; Gauthami Viswan; Alpha T. N’Diaye; Rebecca Y. Lai; Peter A. Dowben

doi:10.3390/molecules29194574

Molecules (Sep 2024)

Evidence of Cooperative Effects for the Fe(phen)2(NCS)2 Spin Crossover Molecular Complex in Polyaniline Plus Iron Magnetite

Wai Kiat Chin,
Binny Tamang,
M. Zaid Zaz,
Arjun Subedi,
Gauthami Viswan,
Alpha T. N’Diaye,
Rebecca Y. Lai,
Peter A. Dowben

Affiliations

Wai Kiat Chin: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
Binny Tamang: Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
M. Zaid Zaz: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
Arjun Subedi: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
Gauthami Viswan: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
Alpha T. N’Diaye: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
Rebecca Y. Lai: Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
Peter A. Dowben: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA

DOI: https://doi.org/10.3390/molecules29194574
Journal volume & issue: Vol. 29, no. 19
p. 4574

Abstract

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The spin crossover complex Fe(phen)2(NCS)2 and its composite, Fe(phen)2(NCS)2, combined with the conducting polymer polyaniline (PANI) plus varying concentrations of iron magnetite (Fe3O4) nanoparticles were studied. A cooperative effect is evident from the hysteresis width in the plot of magnetic susceptibility multiplied by temperature versus temperature (χmT versus T) for Fe(phen)2(NCS)2 with PANI plus varying concentrations of Fe3O4 nanoparticles. The hysteresis width in the composites vary no more than 2 K with respect to the pristine Fe(phen)2(NCS)2 spin crossover crystallites despite the fact that there exists a high degree of miscibility of the Fe(phen)2(NCS)2 spin crossover complex with the PANI. The Fe3O4 nanoparticles in the Fe(phen)2(NCS)2 plus PANI composite tend to agglomerate at higher concentrations regardless of the spin state of Fe(phen)2(NCS)2. Of note is that the Fe3O4 nanoparticles are shown to be antiferromagnetically coupled with the Fe(phen)2(NCS)2 when Fe(phen)2(NCS)2 is in the high spin state.

Published in Molecules

ISSN: 1420-3049 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry
Website: http://www.mdpi.com/journal/molecules

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