A Reversible Hydrogen-Bond Isomerization Triggered by an Abrupt Spin Crossover near Room Temperature

被引：14
作者：
Jornet-Molla, Veronica [1 ]
Gimenez-Saiz, Carlos [1 ]
Yufit, Dmitry S. [2 ]
Howard, Judith A. K. [2 ]
Romero, Francisco M. [1 ]
机构：
[1] Univ Valencia, Inst Ciencia Mol, POB 22085, Valencia 46071, Spain
[2] Univ Durham, Dept Chem, Durham DH1 3LE, England
来源：
CHEMISTRY-A EUROPEAN JOURNAL | 2021年 / 27卷 / 02期
关键词：
hydrogen bonds; iron(II) complexes; isomerization; solvent exchange; spin crossover; THERMAL HYSTERESIS; IRON(II) COMPLEX; PHASE-TRANSITION; STATE; DESIGN;
D O I：
10.1002/chem.202003654
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The spin crossover salt [Fe(bpp)(2)](isonicNO)(2). 2.4 H2O (1.2.4 H2O) (bpp=2,6-bis(pyrazol-3-yl)pyridine; isonicNO=isonicotinate N-oxide anion) exhibits a very abrupt spin crossover at T-1/2=274.4 K. This triggers a supramolecular linkage (H-bond) isomerization that responds reversibly towards light irradiation or temperature change. Isotopic effects in the thermomagnetic behavior reveal the importance of hydrogen bonds in defining the magnetic state. Further, the title compound can be reversibly dehydrated to afford 1, a material that also exhibits spin crossover coupled to H-bond isomerization, leading to strong kinetic effects in the thermomagnetic properties.
引用
收藏
页码：740 / 750
页数：11
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