Abstract
Developing multifunctional spiropyran dyes is of particular importance in diverse applications.In the present study,we synthesized two 2,1,3-benzothiadiazole-conjugated spiropyrans(BT-SP-NO2 and BT-SP-NMe2)with distinct substituents.These donor-acceptor-structured spiropyrans exhibited typical twisted intramolecular charge transfer features and strong emissions in low-polarity solvents with fluorescence quantum yields(QYs)of up to 90.7％.Like traditional spiropyrans,the electron-acceptor-substituted BT-SP-NO2 exhibited excellent photochromic behavior under multiple alternating UV-Vis irradiation,while the electron-donor-substituted BT-SP-NMe2 was an acidochromic dye.In addition,the substituent groups distinctly affected the packing modes of these spiropyrans in the solid state.BT-SP-NMe2 showed a much stronger solid-state emission(QY of 59.0％)than BT-SP-NO2.Moreover,these two dyes were utilized as biocompatible probes for the specific light-up imaging of lipid droplets.
基金项目
National Natural Science Foundation of China(62105184)
Natural Science Foundation of Shandong Province,China(2022HWYQ-007)
Natural Science Foundation of Shandong Province,China(ZR2021QB043)
Special Fund of Taishan Scholars Project of Shandong Province,China(tsqn201909012)
NETL
NSTL
万方数据