Photomagnetic Effects in Polycyanometallate Compounds: An Intriguing Future Chemically Based Technology?

Abstract

Out of the blue: Photoinduced magnetism in polymeric “Prussian Blue” analogues is a well understood phenomenon that can even occur near room temperature. The lessons learned are now being transferred to the synthesis of molecular cyanide‐bridged single‐molecule magnets (see picture; Mo yellow, C black, N blue, Cu purple) whose magnetic properties change drastically on light irradiation.

Photochromism and Photomagnetism of a 3d–4f Hexacyanoferrate at Room Temperature

“…1 For the latter, one of the most appealing is photo-switchable magnetism, the so-called photomagnetism, which may find potential applications in optical information storage 2 and medical service. 4 After the pioneering work of Sato et al, 5 photoinduced magnetization concentrated on PBAs has been widely studied. 4 After the pioneering work of Sato et al, 5 photoinduced magnetization concentrated on PBAs has been widely studied.…”

The assembly, synthesis and properties of a trinuclear cyano-bridged CuII–MoIV–CuII complex

“…There has been interest in photo-magnetic materials based on octacyanometalate precursors [1][2][3][4][5]; octacyanomolybdate(IV) ions, which act as good building blocks, have played an important role in bimetallic assemblies of photo-magnetic materials [6][7][8][9][10][11][12].…”

Progress of Multi Functional Properties of Organic-Inorganic Hybrid System, A[FeIIFeIIIX3] (A = (n-CnH2n+1)4N, Spiropyran; X = C2O2S2, C2OS3, C2O3S)

“…In the case of conjugated phenomena coupled with transport and magnetic properties, for example, a metallic organic conductor coexisting with ferromagnetism for (BEDT-TTF) 3 [Mn(II)Cr(III)(C 2 O 4 ) 3 ] (BEDT-TTF = 4,5-bis(ethylenedithio)tetrathiafulvalene) [1], a field-induced superconductivity for λ-(BETS) 2 FeCl 4 (BETS = 4,5-bis(ethylenedithio) tetraselenafulvalene) [2,3], or the competition of superconducting phase and insulating antiferromagnetic phase for λ-(BETS) 2 Ga 1-x Fe x Cl 4 [4] have been reported. In the case of phenomena coupled with optical and magnetic properties, the light induced excited spin state trapping (LIESST) in spin-crossover complexes [5,6,7], or the photo-induced magnetism in transition metal cyanides [8,9,10,11,12,13] have been reported. In the case of phenomena coupled with optical and transport properties, the photo-induced valence transition for halogen-bridged gold mixed-valence complexes, Cs 2 [Au(I)Au(III)Br 6 ] [14,15], iodine-bridged binuclear Pt complexes [16], or the photo-induced transition between the metallic and insulating phases for organic salts [17,18,19] have been reported.…”