Steric effects in light-induced solvent proton abstraction.
Steric effects in light-induced solvent proton abstraction.
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DOI:
10.1039/d0cp03037f
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发表时间:
2020-09-21
期刊:
影响因子:
--
通讯作者:
Dantus M
中科院分区:
文献类型:
--
作者:
Lahiri J ;Moemeni M ;Magoulas I ;Yuwono SH ;Kline J ;Borhan B ;Piecuch P ;Jackson JE ;Blanchard GJ ;Dantus M
The significance of solvent structural factors in the excited-state proton transfer (ESPT) reactions of Schiff bases with alcohols is reported here. We use the super photobase FR0-SB and a series of primary, secondary, and tertiary alcohol solvents to illustrate the steric issues associated with solvent to photobase proton transfer. Steady-state and time-resolved fluorescence data show that ESPT occurs readily for primary alcohols, with a probability proportional to the relative -OH concentration. For secondary alcohols, ESPT is greatly diminished, consistent with the barrier heights obtained using quantum chemistry calculations. ESPT is not observed in the tertiary alcohol. We explain ESPT using a model involving an intermediate hydrogen-bonded complex where the proton is “shared” by the Schiff base and the alcohol. The formation of this complex depends on the ability of the alcohol solvent to achieve spatial proximity to and alignment with the FR0-SB* imine lone pair stabilized by the solvent environment.
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影响因子:
3.3
作者:
Kang, Baotao;Ko, Kyoung Chul;Lee, Jin Yong
通讯作者:
Lee, Jin Yong
影响因子:
15
作者:
Ekimova, Maria;Hoffmann, Felix;Sebastiani, Daniel
通讯作者:
Sebastiani, Daniel
影响因子:
2.9
作者:
Hunt, Jonathan Ryan;Dawlaty, Jahan M.
通讯作者:
Dawlaty, Jahan M.
影响因子:
15
作者:
NAKAGAWA, T;KOHTANI, S;ITOH, M
通讯作者:
ITOH, M
DOI:
10.1139/v79-444
发表时间:
1979-01-01
期刊:
CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE
影响因子:
--
作者:
REEVE, W;ERIKSON, CM;ALUOTTO, PF
通讯作者:
ALUOTTO, PF