Photophysics of Fe(III)-tartrate and Fe(III)-citrate complexes in aqueous solutions

被引：39

作者：

Pozdnyakov, Ivan P. ^{[1
,2
]}

Kolomeets, Alexander V. ^{[1
,2
]}

Plyusnin, Victor F. ^{[1
,2
]}

Melnikov, Alexey A. ^{[3
]}

Kompanets, Victor O. ^{[3
]}

Chekalin, Sergey V. ^{[3
]}

Tkachenko, Nikolai ^{[4
]}

Lemmetyinen, Helge ^{[4
]}

机构：

[1] Russian Acad Sci, Inst Chem Kinet & Combust, Siberian Branch, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, Novosibirsk 630090, Russia

[3] Russian Acad Sci, Inst Spect, Troitsk 142092, Moscow Region, Russia

[4] Tampere Univ Technol, Dept Chem & Bioengn, FIN-33101 Tampere, Finland

来源：

CHEMICAL PHYSICS LETTERS | 2012年 / 530卷

关键词：

PHOTOINDUCED ELECTRON-TRANSFER; ACYLOXY RADICALS; PYRUVIC-ACID; IRON(III); PHOTOCHEMISTRY; FERRIOXALATE; DYNAMICS; DECARBOXYLATION; SPECTROSCOPY; WATERS;

D O I：

10.1016/j.cplett.2012.01.051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Femtosecond pump-probe spectroscopy was used to determine the photophysical processes of Fe(III) complexes with citric and tartaric acids ([Fe(Cit)] and [Fe(tart)](+)) in aqueous solutions. The excitation of the complexes in the charge transfer bands is followed by formation of an intermediate absorbance decaying with two characteristic times. The shorter time constant (0.2, 0.4 ps) is ascribed to vibrational cooling and solvent relaxation of Frank-Condon excited state of corresponding complex and the second time constant (1.4, 40 ps) is assigned to superposition of internal conversion to the ground state and formation of the long-lived Fe(II) radical complex. The competition of these processes determines the quantum yield of photolysis of Fe(III)-carboxylates. (C) 2012 Elsevier B. V. All rights reserved.

引用

页码：45 / 48

页数：4

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