crystal structures and thermal spin-crossover (SCO) behavior of [Fe(E-dpsp)2](BF4)2·X [E-dpsp = (E)-2,6-bis(1H-pyrazol-1-yl)-4-styrylpyridine; X = crystal solvent] are investigated. The titled iron(II) complex features polymorphology induced by crystal solvents, which is identified by means of single-crystal X-ray diffraction analysis: For [Fe(E-dpsp)2](BF4)2·acetone and [Fe(E-dpsp)2](BF4)2·4MeNO2, detailed
Iron(II) complexes of Z- and E-2,6-di(1H-pyrazol-1-yl)-4-styrylpyridine (Z-2 and E-2, respectively) exhibited visible light photoisomerization from Z-2 to E-2, both in solution and in solid phases. Z-2 occupied the high-spin state over the full temperature range examined, whereas E-2 displayed a spin crossover phenomenon between 100 K and 300 K.
Z- 和 E-2,6-二(1H-吡唑-1-基)-4-苯乙烯基吡啶(分别为 Z-2 和 E-2)的铁(II)配合物在溶液和固相中都表现出从 Z-2 到 E-2 的可见光光异构化。在考察的整个温度范围内,Z-2 都处于高自旋状态,而 E-2 则在 100 K 至 300 K 之间显示出自旋交叉现象。