文献类型：期刊文献

英文题名：Diketopyrrolopyrrole-Based Ratiometric/Turn-on Fluorescent Chemosensors for Citrate Detection in the Near-Infrared Region by an Aggregation-Induced Emission Mechanism

作者：Hang, Yandi;Wang, Jian;Jiang, Tao;Lu, Niannian;Hua, Jianli[1]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2016

卷号：88

期号：3

起止页码：1696

外文期刊名：ANALYTICAL CHEMISTRY

收录：;EI(收录号：20160701919684);WOS:【SCI-EXPANDED(收录号:WOS:000369471100032)】；

基金：For financial support of this research, we thank the National Basic Research 973 Program (2013CB733700) and NSFC/China (21421004, 21172073, 21372082, 21572062 and 91233207).

语种：英文

外文关键词：Infrared devices - Light scattering - Physiology - Fluorescence

摘要：This work reports two new diketoprrrolopyrrole-based fluorescent chemosensors (DPP-Py1 and DPP-Py2) using symmetrical diamides as recognition groups for selective and fast detection of citrate in the near-infrared region. To our delight, DPP-Py1 is a ratiometric sensor, whereas DPP-Py2 is a turn-on fluorescent sensor. It is worth noting that DPP-Py1 has higher accuracy and sensitivity with a relatively lower detection limit (1.8 x 10(-7) M) and better stability in different pH buffers than DPP-Py2. Scanning electron microscopy, dynamic light scattering analyses, H-1 NMR titration, and 2D-NOESY NMR suggested that the fluorescence increment of the probes DPP-Py1 and DPP-Py2 for citrate could probably originate from aggregation-induced emission (AIE) on the basis of the complexation of the pyridinium-based symmetrical diamides, DPPs, with carboxyl anions of citrate. Our work may provide a simpler and faster means for qualitative and quantitative analysis of citrate through an AIE mechanism.