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Issue 10, 2015
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Graphene oxide and reduced graphene oxide hybrids with spin crossover iron(iii) complexes

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Abstract

Graphene (rGO) based hybrid materials exhibiting electrical conductivity and spin crossover (SCO) behavior are reported. The non-conductive [Fe(qnal)2]nGO (1·GO) and [Fe(qsal)2]nGO (2·GO) hybrids have been prepared by employing the electrostatic interaction between the negatively charged graphene oxide (GO) nanosheet and the respective iron(III) complex cations in [Fe(qnal)2]+Cl and [Fe(qsal)2]+Cl. The conductive [Fe(qnal)2]nrGO (1·rGO) and [Fe(qsal)2]nrGO (2·rGO) hybrids were obtained by thermal reduction of 1·GO and 2·GO. 1·GO and 1·rGO exhibit SCO behavior, and 1·rGO also shows a light-induced excited spin state trapping (LIESST) effect. Thus, in 1·rGO the electrical conductivity of rGO and the SCO behavior of [Fe(qnal)2]+ coexist in a single structure. We propose that the observed cooperativity for the rGO nanosheet-bound iron(III) [Fe(qnal)2]+ SCO material occurs through formation of large domains via π–π stacking between the graphene skeleton and the [Fe(qnal)2]+ cations.

Graphical abstract: Graphene oxide and reduced graphene oxide hybrids with spin crossover iron(iii) complexes

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Supplementary files

Article information


Submitted
06 Jun 2015
Accepted
22 Jul 2015
First published
23 Jul 2015

Inorg. Chem. Front., 2015,2, 886-892
Article type
Research Article
Author version available

Graphene oxide and reduced graphene oxide hybrids with spin crossover iron(III) complexes

Y. Murashima, M. R. Karim, N. Saigo, H. Takehira, R. Ohtani, M. Nakamura, M. Koinuma, L. F. Lindoy, K. Kuroiwa and S. Hayami, Inorg. Chem. Front., 2015, 2, 886
DOI: 10.1039/C5QI00097A

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