Effect of alkali ions on optical properties of flavins: vibronic spectra of cryogenic M+lumichrome ions (M = Li-Cs) in the gas phase.
Effect of alkali ions on optical properties of flavins: vibronic spectra of cryogenic M+lumichrome ions (M = Li-Cs) in the gas phase.
复制标题
碱离子对黄素光学性质的影响:气相中低温 M 发光铬离子 (M = Li-Cs) 的振动光谱
DOI:
10.1039/c8cp03950j
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
O. Dopfer
中科院分区:
文献类型:
--
作者:
P. Nieto;D. Müller;A. Sheldrick;A. Günther;M. Miyazaki;O. Dopfer
The photochemical properties of flavins depend sensitively on their environment and are strongly modified by coordination with metal ions. Herein, the electronic spectra of cold complexes of the smallest flavin molecule (lumichrome, LC, C12N4O2H10) with alkali ions (M+LC, M = Li–Cs) are measured by photodissociation in the visible range (VISPD) in a cryogenic ion trap coupled to a tandem mass spectrometer and an electrospray ionization source. The observed vibronic spectra of all ions are assigned to the optically bright S1 ← S0 (ππ*) transition of the most stable O4 isomer of M+LC by comparison with quantum chemical calculations at the PBE0/cc-pVDZ level coupled to multidimensional Franck–Condon simulations. The rich vibronic spectra indicate substantial geometry changes upon S1 excitation. Large red shifts of the S1 origins upon metal complexation and progressions in the intermolecular in-plane metal stretch and bend modes demonstrate that the strength of the metal–flavin interaction in M+LC(O4) strongly increases by S1 excitation. The stronger M+⋯LC bond in the S1 state of M+LC(O4) is rationalized by the charge reorganization upon ππ* excitation of the LC chromophore. The computations confirm that the optical properties of LC can be strongly modulated by metalation via both the type and binding site of the metal ion.
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DOI:
10.1016/0006-3002(61)90005-1
发表时间:
1961-01-01
期刊:
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子:
--
作者:
BAARDA, IF;METZLER, DE
通讯作者:
METZLER, DE
DOI:
10.1039/c4cp01524j
发表时间:
2014-06
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
作者:
A. Günther;P. Nieto;G. Berden;J. Oomens;O. Dopfer
通讯作者:
A. Günther;P. Nieto;G. Berden;J. Oomens;O. Dopfer
影响因子:
4.6
作者:
J. Lauterwein;P. Hemmerich;J. Lhoste
通讯作者:
J. Lhoste
影响因子:
4.4
作者:
Guyon, Laurent;Tabarin, Thibault;Dugourd, Philippe
通讯作者:
Dugourd, Philippe
影响因子:
4.4
作者:
L. Giacomozzi;Christina Kjær;J. L. Knudsen;Lars H. Andersen;S. B. Nielsen;M. Stockett
通讯作者:
M. Stockett