Fluorescent Anion Sensor Derived from Cholic Acid: The Use of Flexible Side Chain
作者:Lei Fang、Wing-Hong Chan、Yong-Bing He、Daniel W. J. Kwong、Albert W. M. Lee
DOI:10.1021/jo050913h
日期:2005.9.1
The fluorescent photoinduced electron transfer (PET) chemosensors 1−3 were synthesized from cholic acid. 1 and 2 containing amidothiourea groups as anion receptive sites demonstrated much higher affinity toward anions than 3 containing traditional thiourea H-bond donating group. Comparative studies on their binding affinity toward carboxylates, dihydrogen phosphate, and halides revealed that the amidothiourea