Sub-picosecond time resolved infrared spectroscopy of high-spin state formation in Fe(ii) spin crossover complexes.
Sub-picosecond time resolved infrared spectroscopy of high-spin state formation in Fe(ii) spin crossover complexes.
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Fe(ii) 自旋交叉配合物中高自旋态形成的亚皮秒时间分辨红外光谱
DOI:
10.1039/b802607f
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
R. Diller
中科院分区:
文献类型:
--
作者:
M.M.N. Wolf;R. Groß;C. Schumann;J.A. Wolny;V. Schünemann;A. Døssing;H. Paulsen;J.J. McGarvey;R. Diller
The photoinduced low-spin (S = 0) to high-spin (S = 2) transition of the iron(II) spin-crossover systems [Fe(btpa)](PF6)2 and [Fe(b(bdpa))](PF6)2 in solution have been studied for the first time by means of ultrafast transient infrared spectroscopy at room temperature. Negative and positive infrared difference bands between 1000 and 1065 cm−1 that appear within the instrumental system response time of 350 fs after excitation at 387 nm display the formation of the vibrationally unrelaxed and hot high-spin 5T2 state. Vibrational relaxation is observed and characterized by the time constants 9.4 ± 0.7 ps for [Fe(btpa)](PF6)2/acetone and 12.7 ± 0.7 ps for both [Fe(btpa)](PF6)2/acetonitrile and [Fe(b(bdpa)](PF6)2/acetonitrile. Vibrational analysis has been performed via DFT calculations of the low-spin and high-spin state normal modes of both compounds as well as their respective infrared absorption cross sections. The simulated infrared difference spectra are dominated by an increase of the absorption cross section upon high-spin state formation in accordance with the experimental infrared spectra.
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影响因子:
4.6
作者:
S. Schenker;P. Stein;J. Wolny;C. Brady;J. McGarvey;H. Toftlund;A. Hauser
通讯作者:
A. Hauser
DOI:
10.1021/j100019a010
发表时间:
1995
期刊:
The Journal of Physical Chemistry
影响因子:
--
作者:
T. Lian;Y. Kholodenko;B. Locke;R. Hochstrasser
通讯作者:
R. Hochstrasser
影响因子:
4.6
作者:
Brady, C;Callaghan, PL;Wolny, JA
通讯作者:
Wolny, JA
影响因子:
2.3
作者:
F. Peters;J. Herbst;J. Tittor;D. Oesterhelt;R. Diller
通讯作者:
R. Diller
影响因子:
8.6
作者:
H. Paulsen;R. Benda;C. Herta;V. Schünemann;A. Chumakov;L. Duelund;H. Winkler;H. Toftlund;A. Trautwein
通讯作者:
A. Trautwein