Design and synthesis of new functionalized 8-(thiophen-2-yl)-1,2,3,4-tetrahydroquinolines as turn-off chemosensors for selective recognition of Pd<sup>2+</sup>ions
作者:Shally、Vijay Kumar、Ismail Althagafi、Ashish Kumar、Divya Singhal、Abhinav Kumar、Rajeev Gupta、Ramendra Pratap
DOI:10.1039/d0nj02272a
日期:——
We have developed two novel chemosensors 6-morpholino-8-(thiophen-2-yl)-1,2,3,4-tetrahydroquinoline-5-carbonitrile (L1) and 6-(methylthio)-8-(thiophen-2-yl)-1,2,3,4-tetrahydroquinoline-5-carbonitrile (L2) for selective identification of highly toxic Pd2+ ions. The selectivity of L1 and L2 was examined with a series of metal ions, among which Pd2+ ions were recognized selectively with fluorescence turn-off
我们已经开发了两个新颖的化学传感器6-吗啉代-8-(噻吩-2-基)-1,2,3,4-四氢喹啉-5-腈(L1)和6-(甲硫基)-8-(噻吩-2- yl)-1,2,3,4-四氢喹啉-5-腈(L2)用于选择性鉴定高毒性的Pd 2+离子。用一系列金属离子检测L1和L2的选择性,其中Pd 2+离子在甲醇的检测下限很低(nM)时,可以通过荧光关断性能选择性识别。合成并研究了另一种化合物L3,以了解噻吩基环在复合物L1 + Pd 2+和L2中的作用+ Pd 2+形成。通过“裸眼”(在365 nm紫外线灯下)还观察到添加Pd 2+后的荧光变化。已经进行了量子化学(DFT)计算,以获取有关化学传感器及其与Pd 2+(L1 + Pd 2+和L2 + Pd 2+)的配合物的稳定性的信息,这表明配合物L2 + Pd 2+为比L1,L2和复合物L1:Pd 2+更稳定。包括Job图,Stern-Volmer图和检测极限在内的许多研究表明,具有Pd