complexation with CB8, the fluorescence intensity increased about 10-fold while the red-NIR emission and the large Stokes shift were preserved. These host–guest complexes can serve as red-NIR fluorescent displacement probes for the detection of CB8 binding guests. The successful detection of addictive drugs in urine was further demonstrated using the host–guest CB8·PMI1 complex and the interference of autofluorescence
设计并合成了具有红色至近红外(red-NIR)发射和大Stokes位移的
水溶性和荧光per
染料PMI1和PMI2。这些
染料被设计成具有两个结合单元(一个芳香族per核和一个阳离子侧基),允许PMI1和PMI2通过疏
水和静电相互作用与葫芦[8] uril(CB8)形成牢固的主体-客体复合物。结果,确定所得复合物的结合常数在10 6 M -1的范围内,与先前报道的仅具有一个结合单元的per
染料相比,其增加了约2个数量级。结果还表明,由于聚集效应,仅
水溶液中的PMI1或PMI2非常低。与CB8络合后,荧光强度增加了约10倍,同时保留了红色近红外发射和较大的斯托克斯位移。这些宿主-客体复合物可作为红色-NIR荧光置换探针,用于检测CB8结合客体。使用宿主-客体CB8 · PMI1复合物进一步证明了尿中成瘾药物的成功检测,尿样品中自发荧光的干扰得以成功消除。