A quest for supramolecular gelators: silver(i) complexes with quinoline-urea derivatives
作者:Dario Braga、Simone d'Agostino、Eros D'Amen、Fabrizia Grepioni、Damiano Genovese、Luca Prodi、Massimo Sgarzi
DOI:10.1039/c3dt51873f
日期:——
The quinoline urea derivatives 1,3-di(quinolin-5-yl)urea (DQ5U), 1-phenyl-3-(quinolin-6-yl)urea (PQ6U), 1-(isoquinolin-5-yl)-3-phenylurea (PiQ5U) and 1-phenyl-3-(3,5-bis(pyrid-2-yl)-1,2,4-triazol-4-yl)urea (PPT4U) have been synthesised and structurally characterized by powder and single crystal X-ray diffraction. Their gelator behaviour in the formation of Ag-complexes has been explored. Compound DQ5U proved capable of gelating the mixed solvent EtOH–DMF 1 : 2 (v/v) when mixed with 1 equivalent of AgNO3. In the case of PQ6U, two polymorphic forms of the complex [Ag(PQ6U)2]NO3, plus the solvated form [Ag(PQ6U)2]NO3·CH3CN, were crystallized. Photophysical characterization of the ligands has been conducted in solution, while fluorescence microscopy has been used to examine the microstructure and photophysical properties of the gels formed by PQ5U and DQ5U with AgNO3.
合成了喹啉脲衍生物 1,3-二(喹啉-5-基)脲(DQ5U)、1-苯基-3-(喹啉-6-基)脲(PQ6U)、1-(异喹啉-5-基)-3-苯基脲(PiQ5U)和 1-苯基-3-(3、5-双(吡啶-2-基)-1,2,4-三唑-4-基)脲(PPT4U)进行了合成,并通过粉末和单晶 X 射线衍射对其结构进行了表征。研究人员还探讨了它们在形成银络合物时的凝胶剂行为。事实证明,当 DQ5U 化合物与 1 个等量的 AgNO3 混合时,能够在混合溶剂 EtOH-DMF 1 : 2 (v/v) 中凝胶化。就 PQ6U 而言,复合物[Ag(PQ6U)2]NO3 的两种多晶型以及溶解型[Ag(PQ6U)2]NO3-CH3CN 均已结晶。配体的光物理特性分析是在溶液中进行的,而荧光显微镜则用于研究 PQ5U 和 DQ5U 与 AgNO3 形成的凝胶的微观结构和光物理特性。