A ladder-type iron(ii) coordination polymer with enhanced spin-crossover behavior. Issue 6 (16th May 2017) - Yan, Zheng
Abstract : A ladder-type 1D coordination polymer with enhanced spin-crossover behaviour is reported. It showed an abrupt spin transition above room temperature with a 3 K hysteresis ( T 1/2 ↓ = 335 K and T 1/2 ↑ = 338 K). Abstract : Few spin-crossover materials with a 1D ladder-type structure have been reported. Previously, [Fe(Mebpt){Au(CN)2 }]·H2 O (MebptH = 3-(5-methyl-2-pyridyl)-5-(2-pyridyl)-1, 2, 4-triazole) was made and shown to display gradual spin-crossover behaviour. In the current work, a new 1D iron(ii ) ladder-type compound, [Fe(bpt){Au(CN)2 }] (bptH = 3-(2-pyridyl)-5-(2-pyridyl)-1, 2, 4-triazole), was produced and showed enhanced spin-crossover behavior. It showed an abrupt spin transition above room temperature with a 3 K hysteresis ( T 1/2 ↓ = 335 K and T 1/2 ↑ = 338 K). The origin of its enhanced spin-crossover could be ascribed to a greater influence of supramolecular interactions over the electronic substituent effect.