Highly efficient fluorescent sensing for α-hydroxy acids with C3-symmetric boronic acid-based receptors
摘要:
Two boronic acid-based fluorescent chemosensors in C-3 symmetry have been prepared with a facial method. These compounds show remarkable ability to recognize alpha-hydroxycarboxy acids and sugar acids over most saccharides. The fluorescence intensity of the receptors decreased obviously upon adding the a-hydroxy acids in a pH 8.71 buffer of methanol-water, which can be explained with the internal charge-transfer (ICT) mechanism. (C) 2008 Elsevier Ltd. All rights reserved.