Magnetic and Mössbauer investigation of the photomagnetic Prussian blue analogue Na(0.32)Co[Fe(CN)6](0.74).3.4H2O: cooperative relaxation of the thermally quenched state.

Thanks to thermal quenching we investigated the relaxation of the metastable state of Na(0.32)Co[Fe(CN)6](0.74).

The three-dimensional coordination polymer tetraethylammonium (ethylenediamine)cadmium(II) hexacyanoferrate(III), (Et(4)N)[[Cd(en)](4)[Fe(CN)(6)](3)].

The title compound, tetraethylammonium dodeca-mu-cyano-hexacyanotetrakis(ethylenediamine)tetracadmium(II)triferrate(III), (C(8)H(20)N)[Cd(4)Fe(3)(CN)(18)(C(2)H(8)N(2))(4)], was prepared from a reaction mixture containing CdCl(2), K(3)[Fe(CN)(6)], ethylenediamine (en) and [Et(4)N]Br in a 1:1:3:1 molar ratio. The crystal structure consists of a negatively charged three-dimensional framework of [[Cd(en)](4)[Fe(CN)(6)](3]n)(n-) anions, with [Et(4)N](+) cations located in the cavities of the framework. The Cd atom is octahedrally coordinated by one disordered chelating en molecule [mean Cd-N = 2.