A reversible SCSC transformation from a blue metamagnetic framework to a pink antiferromagnetic ordering layer exhibiting concomitant solvatochromic and solvatomagnetic effects

Abstract

A [Co₆(μ₃-OH)₄(datrz)₂]⁶⁺ ribbon-based blue framework with a metamagnetic transition from an antiferromagnetic ordering to a weak spontaneous magnetization state, {[Co₃(CH₃OH)(μ₃-OH)₂(datrz)(sip)]·2.25H₂O}_n (1, Hdatrz = 3,5-diamino-1,2,4-triazole, sip³⁻ = 3,5-dicarboxybenzenesulfonate), was solvothermally synthesized. 1 exhibits a reversible single-crystal-to-single-crystal transformation by solvent exchange to generate a pink antiferromagnetic ordering coordination layer with a similar [Co₆(μ₃-OH)₄(datrz)₂]⁶⁺ ribbon to 1, {[Co₃(H₂O)₃(μ₃-OH)₂(datrz)(sip)]·2.125H₂O}_n (2). Such concomitant solvatochromic and solvatomagnetic effects are scarcely observed and are significantly due to the coexistence of differently distorted metal coordination spheres and the cleavage/generation of the weak coordination bond.