Order–Disorder, Symmetry Breaking, and Crystallographic Phase Transition in a Series of Bis(<i>trans</i>-thiocyanate)iron(II) Spin Crossover Complexes Based on Tetradentate Ligands Containing 1,2,3-Triazoles
作者:Maksym Seredyuk、Kateryna Znovjyak、Francisco Javier Valverde-Muñoz、M. Carmen Muñoz、Volodymyr M. Amirkhanov、Igor O. Fritsky、José Antonio Real
DOI:10.1021/acs.inorgchem.3c00830
日期:2023.6.12
We report herein a series of neutral trans-thiocyanate mononuclear spin crossover (SCO) complexes, [FeIIL(NCS)2] (1–4), based on tetradentate ligands L obtained by reaction of N-substituted 1,2,3-triazolecarbaldehyde with 1,3-propanediamine or 2,2-dimethyl-1,3-diaminopropane [L = N1,N3-bis((1,5-dimethyl-1H-1,2,3-triazol-4-yl)methylene)propane-1,3-diamine/-2,2-dimethylpropane-1,3-diamine, 1/2 and N1
我们在此报告了一系列中性反式硫氰酸酯单核自旋交叉 (SCO) 配合物,[Fe II L(NCS) 2 ] ( 1 – 4 ),基于通过 N-取代的 1,2,3 反应获得的四齿配体 L -三唑甲醛与 1,3-丙二胺或 2,2-二甲基-1,3-二氨基丙烷 [L = N 1 , N 3 -双((1,5-二甲基-1 H -1,2,3-三唑-4 -yl)methylene)propane-1,3-diamine/-2,2-dimethylpropane-1,3-diamine, 1 / 2 and N 1 , N 3 -bis((1-ethyl/1-propyl-1 H-1,2,3-三唑-4-基)亚甲基)-2,2-二甲基丙烷-1,3-二胺, 3 / 4 ]。热诱导的 SCO 行为的特点是突然转变,平均临界温度 (Δ T 1/2 )/滞后环宽度 (Δ T hyst ) 在 190–252/5–14 K