Donor-conformation-dependent energy transfer for dual-color fluorescent probe with high-resolution imaging  

作　　者：Lifang Guo Xin Jin Hao Liu Jiangnan Zhu Zhiyun Zhang Jianhua Su 

机构地区：[1]Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering,Feringa Nobel Prize Scientist Joint Research Centre,Frontiers Science Center for Materiobiology and Dynamic Chemistry,East China University of Science&Technology,Shanghai,200237,China

出　　处：《Science China Chemistry》2021年第8期1310-1315,共6页中国科学（化学英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(21788102,21905090,21790361,22004036,91859205);Shanghai Municipal Science and Technology Major Project(2018SHZDZX03);the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning,Programme of Introducing Talents of Discipline to Universities(B16017);Shanghai Science and Technology Committee(17520750100);Natural Science Foundation of Shanghai(19ZR1412200),and the Fundamental Research Funds for the Central Universities.

摘　　要：Herein,we presented a brand-new concept to construct the Forster resonance energy transfer(FRET)based cassette by integrating a vibration-induced emission(VIE)chromophore as the donor.Different from traditional donors only with a single emission,the VIE donor possessed well-separated dual emission bands by altering the excited state molecular configuration from the bent state to the planar state.By linking an acceptor such as a cyanine dye(Cy5),a novel VIE-FRET cassette(PPCy5)was prepared.The planar emission profile of the VIE donor moiety could fully cover the absorption of Cy5,and thus the complete FRET process enabled the excellent bimodal spectra difference of 142 nm and ultra-large pseudo-Stokes shift of up to 300 nm.Benefiting from the viscosity-dependent characteristic of the VIE donor,PPCy5 could clearly and intuitively reveal the different viscosity regions in vivo by dual-color and high-resolution imaging.The VIE-FRET paradigm provides an optional platform for developing donor-acceptor-based dual-color fluorescent probes with high-resolution imaging ability.

关 键 词：VIE FRET high-resolution dual-color large Stokes shift 

分 类 号：O657.3[理学—分析化学]