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

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

doi:10.3390/molecules29194574

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

Journal Article · Thu Sep 26 00:00:00 EDT 2024 · Molecules

DOI:https://doi.org/10.3390/molecules29194574· OSTI ID:2448108

; Tamang, Binny; Zaz, M. Zaid; Subedi, Arjun; ; N’Diaye, Alpha T.; ;

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.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 2448108

Journal Information:: Molecules, Journal Name: Molecules Journal Issue: 19 Vol. 29; ISSN MOLEFW; ISSN 1420-3049

Publisher:: MDPI AGCopyright Statement

Country of Publication:: Switzerland

Language:: English

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

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

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