文献类型：期刊文献

英文题名：Colorimetric and Ratiometric Near-Infrared Fluorescent Cyanide Chemodosimeter Based on Phenazine Derivatives

作者：Yang, Lin[1,2];Li, Xin[3];Yang, Jiabao[1,2];Qu, Yi[1,2];Hua, Jianli[1,2]

机构：[1]E China Univ Sci & Technol, Adv Mat Lab, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]KTH Royal Inst Technol, Sch Biotechnol, Dept Theoret Chem & Biol, SE-10691 Stockholm, Sweden

年份：2013

卷号：5

期号：4

起止页码：1317

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20131116106755);WOS:【SCI-EXPANDED(收录号:WOS:000315619100020)】；

基金：This work was supported by NSFC/China (2116110444 and 21172073), the National Basic Research 973 Program (2013CB733700), the Fundamental Research Funds for the Central Universities (WJ0913001). J.-L.H. appreciates Prof. H. Tian very much for his helpful discussion and valuable comments.

语种：英文

外文关键词：colorimetry; near-infrared fluorescence; cyanide; phenazine derivatives; sensors; intramolecular charge transfer

摘要：Two new near-infrared chemodosimeters for cyanide anion based on 5,10-dihexyl-5,10-dihydrophenazine were designed and synthesized. With dicyano-vinyl groups as the recognition site and electron-withdrawing groups on both sides, probe 1 exhibited an intramolecular charge transfer (ICT) absorption band at 545 nm and emission band at 730 nm, respectively, and thus showed an ICT block process and realized an 'on-off" response after bilateral reaction with cyanide anions in CH3CN. Probe 2 utilized an unreactive formyl group instead of one of the two reactive dicyano-vinyl groups as the electron-withdrawing component. Due to the unilateral recognition process the ICT of probe 2 was redirected and lead to a remarkably colorimetric and ratiometric near-infrared (NIR) fluorescent response for cyanine. Both probes provided high sensitivity and selectivity with apparent response signals which can be observed by naked eyes, even in the copresence of various other interference anions. Optical spectroscopic techniques, NMR titration measurements, and density functional theory calculations were conducted to rationalize the sensing mechanisms of these two probes.