苯并噻唑
分子内力
含时密度泛函理论
密度泛函理论
荧光
分子轨道
化学
激发态
光化学
分子
氢键
极性效应
计算化学
原子物理学
立体化学
有机化学
物理
量子力学
作者
Lu Chen,Hongbin He,Xindi Huang,Honghong Xu,Yu Yan
标识
DOI:10.1016/j.saa.2023.122666
摘要
Using density functional theory (DFT) and time-dependent density functional theory (TDDFT), we investigate the fluorescence mechanism of (E)-4-(3-(benzo[d]thiazol-2-yl)-2-hydroxy-5-methylstyryl)-1-methylpyridin-1-ium (HBTMY) and the excited-state intramolecular proton transfer process (ESIPT) of hydroxyphenyl. Herein, we introduce two electron-donating (amino and methoxy) and two electron-withdrawing (hydrogen and cyano) groups into HBTMY to study their effects on the fluorescence and the ESIPT process. Structural parameters, infrared vibration frequency, vertical excitation and emission energies as well as frontier molecular orbitals show that the substituents have different impacts on intramolecular hydrogen bonding behavior. The result shows that the fluorescence wavelength of molecules with the amino group could reach the near-infrared area, which favors using this fluorescence in the living cell. As the ability of electron-absorbing groups increases, the forward energy barrier in the potential energy curves decreases sharply making the ESIPT process more familiar to take place. Thus, this work offers a guide for cell imaging and provides strategies to adjust and control fluorescence by introducing substituents.
科研通智能强力驱动
Strongly Powered by AbleSci AI