DFT/TDDFT Study on the Sensing Mechanism of a Fluorescent Probe for Hydrogen Sulfide: Excited State Intramolecular Proton Transfer Coupled Twisted Intramolecular Charge Transfer | |
Li, Yang1,3; Chu, Tian-Shu2,3 | |
刊名 | JOURNAL OF PHYSICAL CHEMISTRY A |
2017-07-20 | |
卷号 | 121期号:28页码:5245-5256 |
英文摘要 | By using density functional theory (DFT) and time-dependent density functional theory (TDDFT) methods, the sensing mechanism of a fluorescent probe 2-(2-hydroxyphenyl) benzothiazole (HBT) derivative HBTPP-S for hydrogen sulfide has been thoroughly studied. The thiolysis reaction has a moderate reaction barrier of 18.40 kcal mol(-1), which indicates that the hydrogen sulfide sensing process has a favorable response speed. Because of the nonradiative donor-excited photoinduced electron transfer (d-PET, fluorophore as the electron donor) from the excited HBTPP group to the electron-withdrawing 2,4-dinitrophenyl group, as well as the inhibition of the proton transfer (PT) and the excited state intramolecular proton transfer (ESIPT) process by 2,4-dinitrophenyl group, the probe HBTPP-S is essentially nonfluorescent. On the other hand, the added hydrogen sulfide induces the thiolysis of the 2,4-dinitrophenyl ether bond, and then the thiolysis product HBTPP comes into existence. The theoretically simulated potential energy surface demonstrates that without the electron-withdrawing 2,4-dinitrophenyl group, the thiolysis product HBTPP undergoes the excited state intramolecular proton transfer (ESIPT) coupled twisted intramolecular charge transfer (TICT) processes in the first excited state. The absence of the d-PET and the process mentioned above may explain the significant fluorescent turn-on response and large Stokes shift of the thiolysis product HBTPP. |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Chemistry, Physical ; Physics, Atomic, Molecular & Chemical |
研究领域[WOS] | Chemistry ; Physics |
关键词[WOS] | PHOTOINDUCED ELECTRON-TRANSFER ; GAUSSIAN-BASIS SETS ; LIVING CELLS ; TD-DFT ; ANISOTROPIC DIELECTRICS ; FEMTOSECOND DYNAMICS ; SELECTIVE DETECTION ; OPTICAL-PROPERTIES ; TRANSFER ESIPT ; REDOX CYCLE |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000406357000002 |
内容类型 | 期刊论文 |
源URL | [http://cas-ir.dicp.ac.cn/handle/321008/149936] |
专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Qingdao Univ, Inst Computat Sci & Engn, Lab New Fiber Mat & Modern Text, Growing Base State Key Lab, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Yang,Chu, Tian-Shu. DFT/TDDFT Study on the Sensing Mechanism of a Fluorescent Probe for Hydrogen Sulfide: Excited State Intramolecular Proton Transfer Coupled Twisted Intramolecular Charge Transfer[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2017,121(28):5245-5256. |
APA | Li, Yang,&Chu, Tian-Shu.(2017).DFT/TDDFT Study on the Sensing Mechanism of a Fluorescent Probe for Hydrogen Sulfide: Excited State Intramolecular Proton Transfer Coupled Twisted Intramolecular Charge Transfer.JOURNAL OF PHYSICAL CHEMISTRY A,121(28),5245-5256. |
MLA | Li, Yang,et al."DFT/TDDFT Study on the Sensing Mechanism of a Fluorescent Probe for Hydrogen Sulfide: Excited State Intramolecular Proton Transfer Coupled Twisted Intramolecular Charge Transfer".JOURNAL OF PHYSICAL CHEMISTRY A 121.28(2017):5245-5256. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论