By employing dipalladium corners [(bpy)2Pd2(NO3)2](NO3)2 or [(phen)2Pd2(NO3)2](NO3)2 (where bpy = 2,2′-bipyridine and phen = 1,10-phenanthroline) to bridge ferrocene-based dipyrazole ligand (L11) and m-phenylene-based dipyrazole ligands (L2–32–3) in aqueous solution, a series of positively-charged [M4L2]4+ metallomacrocycles were obtained. Their structures were characterized by 1H NMR, electrospray ionization mass spectrometry (ESI-MS), elemental analysis, and single crystal X-ray diffraction analysis for 1·4NO3 ([(bpy)Pd]4L112}(NO3)4) and 4·4NO3 ([(phen)Pd]4L222}(NO3)4). In their single crystal structures, NO3− anions are located at the dipalladium corners by C–H⋯O hydrogen bonds. Importantly, the anion-sensing properties of ferrocene functionalized [Pd4Fe2] hetero-metallomacrocycle 1 were investigated in acetonitrile by SWV, CV and NMR analysis, showing promise for Br− sensing.
通过使用二
钯角[(bpy)2Pd2(
NO3)2]( )2或[(phen)2Pd2( )2]( )2(其中 bpy = 2,2′-联
吡啶,phen = 1、在
水溶液中,将
二茂铁基二
吡唑配体(L11)和
间苯二酚基二
吡唑配体(
L2-32-3)桥接起来,得到了一系列带正电荷的 [
M4L2]4+
金属大环。1-4 ([(bpy)Pd]4L112}( )4) 和 4-4 ([(phen)Pd]4
L222}( )4) 通过 1H NMR、电喷雾质谱 (ESI-MS)、元素分析和单晶 X 射线衍射分析对它们的结构进行了表征。在它们的单晶结构中, - 阴离子通过 C-H⋯O 氢键位于二
钯角上。重要的是,通过 SWV、CV 和 NMR 分析,研究了
二茂铁官能化 [Pd4Fe2] 杂
金属环 1 在
乙腈中的阴离子传感特性,结果表明它有望用于
硼传感。