Reversible quantitative guest sensing via spin crossover of an iron(ii) triazole.

ABSTRACT: A new phenyl-triazole-pyrazine ligand, 4-p-tolyl-3-(phenyl)-5-(2-pyrazinyl)-1,2,4-triazole (tolpzph), was prepared in order to enforce pyrazine coordination of the iron(ii) centre in the resulting complex, [Fe^II(tolpzph)₂(NCS)₂]·THF (1·THF). Structure determinations carried out on this discrete mononuclear complex, 1·THF, at 273 K (mostly high spin) and 100 K (mostly low spin) demonstrate this was successful, and that spin crossover (SCO) occurred on cooling. Subsequent magnetic measurements on 1·THF revealed that it shows highly sensitive and reversible solvent-dependent SCO, with T_1/2(1·THF) = 255 K vs. T_1/2(1) = 212 K (with SCO of 1 more abrupt and occurrin

SUBMITTER: Miller RG 

PROVIDER: S-EPMC5477032 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature