摘要
This study presents the synthesis of three dinuclear cobalt complexes based on three imine derivatives:bis-[4-(2-pyridylmethyleneamino)-phenyl]thioether(L1),bis-[4-(2-pyridylmethyleneamino)-phenyl]ether(L2),and bis-[4-(2-pyridylmethyleneamino)-phenyl]methane(L3).Single-crystal X-ray diffraction analysis reveals that the complexes[Co_(2)(L1)3](ClO_(4))4·2CH_(3)CN(1),[Co_(2)(L2)3](ClO_(4))4·2CH_(3)OH(2),and[Co_(2)(L3)3](ClO_(4))4·2CH_(3)OH(3)all exhibit a dinuclear structure.Magnetic test results show that complex 3 exhibited irreversible SCO behavior induced by loss of solvent at 300 K,with the average Co-N bond length increasing from 0.2139(3)to 0.2153(3)nm.Meanwhile,the desolvated complex 3 exhibited paramagnetic behavior similar to that of complexes 1 and 2.Variable-temperature UV-Vis spectroscopic studies also indicate that complex 3 undergoes a solvent-loss-induced spin-state transition.CCDC:2347354,1(120 K);2347355,2(120 K);2347356,3(120 K);2347357,3(400 K).
本研究基于3种亚胺衍生物bis-[4-(2-pyridylmethyleneamino)-phenyl]thioether(L1)、bis-[4-(2-pyridylmethyleneamino)-phenyl]ether(L2)和bis-[4-(2-pyridylmethyleneamino)-phenyl]methane(L3)合成了3例双核钴配合物。单晶X射线衍射表明配合物[Co_(2)(L1)3](ClO_(4))4·2CH_(3)CN(1)、[Co_(2)(L2)_(3)](ClO_(4))_(4)·2CH_(3)OH(2)和[Co_(2)(L3)3](ClO_(4))4·2CH_(3)OH(3)均为双核结构。磁性测试结果表明,化合物3在300 K时表现出由失溶剂诱导的不可逆的SCO行为,Co-N的平均键长从0.2139(3)nm增加到0.2153(3)nm。失溶剂后的化合物3表现出与化合物1和化合物2相似的变温磁化率行为。变温紫外可见光谱研究也表明化合物3发生失溶剂诱导的自旋态转变。
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2024年第11期2212-2220,共9页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.22222103,22173015,21801037,22071017)
中央高校基本科研业务费专项资金(No.DUT22LAB606)资助。
