solution and pKa values were determined in both water and MeCN. Taking advantage of these acidic NH protons, anion sensing behavior of the complex was thoroughly investigated in both acetonitrile and water through multiple optical channels. The complex behaves as sensor for F−, CN−, AcO- and H2PO4- in acetonitrile without much selectivity, while selectivity dramatically increases in water where it exclusively
摘要阴离子和溶剂诱导的[(bpy)2Ru(H2L)Ru(bpy)2] 4+类型的双核Ru(II)配合物的光物理行为调控,其中H2L = 2,5-bis [1,10在这项工作中,彻底研究了[]
菲咯啉[4,5-f]-
咪唑-2-基)
噻吩}和bpy =
2,2'-联吡啶。该配合物显示出强烈的室温发射,激发态寿命取决于溶剂的性质,在122至1089 ns之间变化。该复合物在其第二配位域中具有两个
咪唑NH质子。在增加溶液的pH值后,这两个酸性NH质子会进行连续的去质子化,并在
水和MeCN中确定pKa值。利用这些酸性NH质子,通过多个光学通道在
乙腈和
水中对配合物的阴离子感测行为进行了彻底研究。该络合物充当
乙腈中F-,CN-,AcO-和H2PO4-的传感器,但选择性不高,而在仅检测CN-的
水中,选择性则显着提高。在过量阴离子的存在下,
咪唑极化的NH片段发生去质子化,这也通过肉眼可见的颜色从黄色到橙色的变化