Qiu Ya-Ru, Cui Long, Ge Jing-Yuan, Kurmoo Mohamedally, Ma Guijun, Su Jian
School of Physical Science and Technology, ShanghaiTech University, Shanghai, China.
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, China.
Front Chem. 2021 Aug 2;9:692939. doi: 10.3389/fchem.2021.692939. eCollection 2021.
Two polymorphic Fe coordination polymers [FeL (TPPE)] ) and [(Fe L (TPPE))] ), were obtained from a redox-active tetrathiafulvalene (TTF) functionalized ligand [HL = 2,2'-(((2-(4,5-bis-(methylthio)-1,3-dithiol-2-ylidene)benzo(d) (1,3) dithiole-5,6-diyl)bis-(azanediyl))bis-(meth anylylidene)) (2E,2E')-bis(3-oxobutanoate)] and a highly luminescent connector {TPPE = 1,1,2,2-tetrakis[4-(pyridine-4-yl)phenyl]-ethene}. Complex has a layered structure where the TPPE uses its four diverging pyridines from the TPPE ligand are coordinated by the positions to the flat TTF Schiff-base ligand, and complex has an unprecedented catenation of layers within two interpenetrated frameworks. These coordination polymers reserved the redox activity of the TTF unit. Complex shows gradual spin transition behavior without hysteresis. And the fluorescence intensity of TPPE in changes in tandem with the spin crossover (SCO) transition indicating a possible interplay between fluorescence and SCO behavior.
通过一种具有氧化还原活性的四硫富瓦烯（TTF）功能化配体[HL = 2,2'-(((2-(4,5-双-(甲硫基)-1,3-二硫醇-2-亚基)苯并(d)(1,3)二硫代-5,6-二亚基)双-(氮杂二亚基))双-(亚甲基))(2E,2E')-双(3-氧代丁酸酯)]和一种高发光连接体{TPPE = 1,1,2,2-四[4-(吡啶-4-基)苯基]-乙烯}，得到了两种多晶型铁配位聚合物[FeL(TPPE)]和[(FeL(TPPE))]。配合物具有层状结构，其中TPPE利用其来自TPPE配体的四个发散吡啶通过与扁平TTF席夫碱配体的位置配位，并且配合物在两个互穿框架内具有前所未有的层间连锁。这些配位聚合物保留了TTF单元的氧化还原活性。配合物表现出无滞后的逐渐自旋转变行为。并且在中TPPE的荧光强度与自旋交叉（SCO）转变同步变化，表明荧光和SCO行为之间可能存在相互作用。
