文献类型：期刊文献

英文题名：Molecular Cursor Caliper: A Fluorescent Sensor for Dicarboxylate Dianions

作者：Chen, Wei[1,2,3];Guo, Chenxing[1];He, Qing[1];Chi, Xiaodong[1];Lynch, Vincent M.[1];Zhang, Zhiyun[2,3];Su, Jianhua[2,3];Tian, He[2,3];Sessler, Jonathan L.[1]

机构：[1]Univ Texas Austin, Dept Chem, 105 East 24th St,Stop A5300, Austin, TX 78712 USA;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Joint Int Res Lab Precis Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：141

期号：37

起止页码：14798

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20193907479384);WOS:【SCI-EXPANDED(收录号:WOS:000487180200045)】；

基金：This work was supported by the Office of Basic Energy Sciences, U.S. Department of Energy (DOE) (Grant DE-FG02-01ER15186 to J.L.S.), and the Robert A. Welch Foundation (F-0018). H.T. thanks NSFC/China (21788102) and Shanghai Municipal Science and Technology Major Project (Grant No. 2018SHZDZX03) for financial support. W.C. thanks the China Scholarship Council (CSC) for financial support of the research at University of Texas at Austin. We thank Prof. Emily Que (UT Austin) for allowing use of her fluorimeter. C.G. thanks Dr. Lingyu Zeng (UT Austin) for helpful discussions.

语种：英文

外文关键词：Aromatic compounds - Blue shift - Red Shift - Binding energy - Chemical analysis - Hydrogen bonds - Carboxylation - Negative ions - Complexation

摘要：We report here the fluorescent sensing of both aromatic and linear saturated dicarboxylate anions (DC2-) (as their tetrabutylammonium salts) with different lengths and shapes in acetonitrile using a single fluorescent probe, i.e., the bis-calix[4]pyrrole-appended 9,14-diphenyl-9,14-dihydrodibenzo[a,c]phenazine (DPAC-bisC4P) incorporating a vibration-induced emission (VIE) phenazine core. Fluorescence titration studies revealed that treating DPAC-bisC4P with dicarboxylate guests capable of forming pseudomacrocyclic host-guest complexes via multiple hydrogen-bonding interactions between the dicarboxylates and calix[4]pyrrole moieties led to a blue-shift in the emission of the phenazine core. The binding-based fluorescence-tuning features of DPAC-bisC4P allow the underlying binding events and inferred structural changes to be monitored in the form of different chromaticity outputs. The analyte-induced differences in the fluorescence response to DC2- cover a wide range within the chromaticity diagram and can be visualized readily. The present system thus functions as a rudimentary dicarboxylate anion sensor. It highlights the potential benefits associated with combining a tunable VIE core with noncovalent binding interactions and thus sets the stage for the development of new fluorescent chemosensors where a single chemical entity responds to different analytes with a high level of tunability.