捕获一个前所未有的八坐标铁 (((II) 复合体与中性 bis-tetrazolylpyridyl 连接体和溶剂分子
Luca Rigamonti1, Lorenzo Marchi1, Valentina Fiorini2
1Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy. luca.rigamonti@unimore.it.
Dalton transactions (Cambridge, England : 2003)
|January 25, 2024
概括
这项研究探讨了铁 (II) 协调化学,揭示了溶剂极性如何控制自旋状态多样性复合物的结晶. 这些复合体在高旋转和低旋转状态之间相互转换,形成新的结构并提供对功能材料的见解.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
背景情况:
- 铁 (II) 复合体表现出多样化的协调化学,对于开发功能性材料至关重要.
- 2,6-bis(2-(甲基) - 2H-四-5-yl) 胺 (Me2btp) 提供了一个三酸供体框架用于化.
- 控制铁 (II) 复合体中的自旋状态是调节其性质的关键.
研究的目的:
- 为了研究溶剂极性的影响在结晶和铁的自旋状态行为(II) -Me2btp复合体.
- 描述不同铁 (II) 复杂形式的结构互换和稳定性.
- 探索固态中前所未有的协调数和中间体的形成.
主要方法:
- 在金属化和结晶过程中控制溶剂极性.
- 单晶X射线衍射用于结构确定.
- 磁测量以确认铁的旋转状态 (高旋转/低旋转).
- 支持结构观测的理论计算.
主要成果:
- [FeHS/LS(Me2btp) ]2](ClO4) 2·MeCN·2.75H2O (2HS/LS·MeCN·2.75H2O) 的选择性结晶具有混合的自旋状态 (一半的HS,一半的LS).
- 在空气中自发转化为[FeHS(Me2btp) ](ClO4) 2·溶剂 (2HS·溶剂),所有铁在高旋转状态下.
- 在溶液中停留时形成一个共同晶体[FeLS(Me2btp) ][FeHS(Me2btp) ][MeCN) ][H2O) ][ClO4) 4·MeCN (2LS·3HS·MeCN).
- 一种前所未有的八度协调物种 [Fe ((Me2btp) 2 ((MeCN)) ((H2O)) ] ((ClO4) 2·H2O (1·H2O)) 作为黄色晶体被分离出来.
结论:
- 溶剂极性和晶体环境对铁具有关键影响 (II) 旋转状态和复杂的相互转换.
- 八坐标物种1·H2O代表了固态转化途径中的一个被困的中间体.
- 该研究强调了铁的动态性质 (II) 协调复合体及其对可调节的功能性质的潜力.
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