Journal of the Chemical Society - Faraday Transactions p. 2239 - 2244 (1996)
Update date:2022-08-16
Topics:
Carmona, Carmen
Balon, Manuel
Munoz, Maria A.
Guardado, Pilar
Steady-state and time-resolved fluorescence measurements of THHN (9H-1-methyl-1,2,3,4-tetrahydropyrido[3,4-b]indole), have been carried out as a function of the acidity or basicity of the medium. In these media, four different THHN species have been detected, namely: dication (DC), cation (C), neutral (N) and anion (A). Attempts have been made to determine the excited state pKa* values for the three prototropic processes: N-A, C-N and DC-C reactions. The dicationic and anionic forms, observed outside the 0-14 pH range, are extremely weakly fluorescent species and only the second-order rate constants for the protonation and deprotonation processes, respectively, could be determined. In the case of the C-N process, studied in near-neutral media, excited-state proton exchange is much slower than fluorescence emission and the inflection points in the fluorimetric titration curves correspond quite closely to the ground state pKaG.
View MoreShanghai Pengkai Chemical Co.,Ltd
Contact:+86-21-60526671
Address:No.4226 Duzhuang Rd Minhang District Shanghai China
AstaTech ( Chengdu) BioPharmaceutical Corp.
website:http://www.astabiochem.cn/
Contact:+86-15198215156-15198215156
Address:SICHUAN CHENGDU
Contact:+86-13914766747
Address:Floors 21&22, Jin Cheng Tower, No. 216 Middle Longpan Road, Nanjing
jiangsu haian chemical co.,ltd.
Contact:86-513-15851283853
Address:No.99,Changjiang West Road,Haian County,Jiangsu Province,China
Jinan Yijialian Economic and Trade Development Co., Ltd.
Contact:+86 0531-66729596
Address:jinan
Doi:10.1016/S0022-3697(01)00101-9
(2001)Doi:10.1016/j.molstruc.2021.130771
(2021)Doi:10.1021/ja00310a045
(1985)Doi:10.1021/jacs.0c05042
(2020)Doi:10.1021/ja01218a031
(1945)Doi:10.1002/ejoc.201601271
(2017)
