Issue 29, 2023

Light and thermally activated spin crossover coupled to an order–disorder transition of a propyl chain in an iron(iii) complex

Abstract

A series of three solvates [Fe(naphPren)2]I·CH2Cl21, [Fe(naphPren)2]I·CHCl32 and [Fe(naphPren)2]I·acetone 3 with the novel ligand HnaphPren {2-([(2-(propylamino)ethyl]imino)methyl)naphthalen-2-ol} is reported. Magnetic studies of these complexes reveal that 1 exhibits an abrupt SCO at 162 K, whereas 2 possesses a more gradual SCO centred at 172 K. 3 is trapped in the HS state, but irradiation at 980 nm enables accessibility to a hidden LS state via reverse-LIESST. The structures of 1–3 reveal that 1 and 2 show reversible disorder in the propyl group that is coupled to SCO which is absent in the acetone solvate. This study demonstrates how solvent subtly alters the packing impacting the potential flexibility of the propyl chain and thereby switching SCO on or off.

Graphical abstract: Light and thermally activated spin crossover coupled to an order–disorder transition of a propyl chain in an iron(iii) complex

Supplementary files

Article information

Article type
Paper
Submitted
27 Apr 2023
Accepted
31 May 2023
First published
01 Jun 2023

CrystEngComm, 2023,25, 4126-4132

Light and thermally activated spin crossover coupled to an order–disorder transition of a propyl chain in an iron(III) complex

T. Boonprab, U. Habarakada, G. Chastanet, P. Harding and D. J. Harding, CrystEngComm, 2023, 25, 4126 DOI: 10.1039/D3CE00425B

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