Photo-induced oxidation of [FeII(N4Py)CH3CN] and related complexes

被引：19
作者：
Draksharapu, Apparao [1 ]
Li, Qian [1 ]
Roelfes, Gerard [1 ]
Browne, Wesley R. [1 ]
机构：
[1] Univ Groningen, Stratingh Inst Chem, Fac Math & Nat Sci, NL-9747 AG Groningen, Netherlands
来源：
DALTON TRANSACTIONS | 2012年 / 41卷 / 42期
关键词：
INDUCED SPIN-CROSSOVER; DNA CLEAVAGE; POLYPYRIDINE COMPLEXES; IRON(II) COMPLEX; RESONANCE RAMAN; PHOTOCHEMISTRY; RELAXATION; INTERMEDIATE; PHOTOPHYSICS; TEMPERATURE;
D O I：
10.1039/c2dt30392b
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The photochemistry of the complexes [Fe(N4Py)(CH3CN)](ClO4)(2) (1), where N4Py is 1,1-di(pyridin-2-yl)-N, N-bis(pyridin-2-ylmethyl) methanamine and [Fe(MeN4Py)(CH3CN)](ClO4)(2) (2), where MeN4Py is 1,1-di(pyridin-2-yl)-N, N-bis(pyridin-2-ylmethyl)ethanamine, in water, dichloromethane and methanol is described. Under UV or visible irradiation both 1 and 2 undergo enhancement of the rate of outer sphere electron transfer to O-3(2) to yield the superoxide radical anion and the complexes in the Fe(III) redox state. Addition of ascorbic acid to the photoproduct leads to a recovery of the initial UV/Vis spectrum of 1 and 2, indicating that ligand oxidation does not occur. The results are discussed within the context of the recent report of the enhancement of the oxidative DNA cleavage activity of 1 under UV and visible irradiation (Inorg. Chem. 2010, 49, 11009).
引用
收藏
页码：13180 / 13190
页数：11
相关论文
共 34 条
[1]   OBSERVATION OF BIPHASIC KINETICS IN LIGHT-INDUCED SPIN-STATE CROSSOVER IN AN IRON(II) COMPLEX IN SOLUTION [J].
ALOBAIDI, AHR ;
MCGARVEY, JJ ;
TAYLOR, KP ;
BELL, SEJ ;
JENSEN, KB ;
TOFTLUND, H .
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1993, (06) :536-538
[2]   Time-resolved relaxation studies of spin crossover systems in solution [J].
Brady, C ;
McGarvey, JJ ;
McCusker, JK ;
Toftlund, H ;
Hendrickson, DN .
SPIN CROSSOVER IN TRANSITION METAL COMPOUNDS III, 2004, 235 :1-22
[3]   Molecular structure and vibrational spectra of spin-crossover complexes in solution and colloidal media: Resonance Raman and time-resolved resonance Raman studies [J].
Brady, C ;
Callaghan, PL ;
Ciunik, Z ;
Coates, CG ;
Dossing, A ;
Hazell, A ;
McGarvey, JJ ;
Schenker, S ;
Toftlund, H ;
Trautwein, AX ;
Winkler, H ;
Wolny, JA .
INORGANIC CHEMISTRY, 2004, 43 (14) :4289-4299
[4]   Femtosecond XANES Study of the Light-Induced Spin Crossover Dynamics in an Iron(II) Complex [J].
Bressler, Ch. ;
Milne, C. ;
Pham, V. -T. ;
ElNahhas, A. ;
van der Veen, R. M. ;
Gawelda, W. ;
Johnson, S. ;
Beaud, P. ;
Grolimund, D. ;
Kaiser, M. ;
Borca, C. N. ;
Ingold, G. ;
Abela, R. ;
Chergui, M. .
SCIENCE, 2009, 323 (5913) :489-492
[5]   Characterization of an FeIII-OOH species and its decomposition product in a bleomycin model system [J].
Bukowski, MR ;
Zhu, SR ;
Koehntop, KD ;
Brennessel, WW ;
Que, L .
JOURNAL OF BIOLOGICAL INORGANIC CHEMISTRY, 2004, 9 (01) :39-48
[6]  
BURGER RM, 1983, J BIOL CHEM, V258, P1559
[7]   Photochemistry and photophysics of coordination compounds: Ruthenium [J].
Campagna, Sebastiano ;
Puntoriero, Fausto ;
Nastasi, Francesco ;
Bergamini, Giacomo ;
Balzani, Vincenzo .
PHOTOCHEMISTRY AND PHOTOPHYSICS OF COORDINATION COMPOUNDS I, 2007, 280 :117-214
[8]   Light-induced spin crossover in Fe(II)-based complexes: The full photocycle unraveled by ultrafast optical and X-ray spectroscopies [J].
Cannizzo, A. ;
Milne, C. J. ;
Consani, C. ;
Gawelda, W. ;
Bressler, Ch. ;
van Mourik, F. ;
Chergui, M. .
COORDINATION CHEMISTRY REVIEWS, 2010, 254 (21-22) :2677-2686
[9]   Old Molecules, New Concepts: [Ru(bpy)3]2+ as a Molecular Encoder-Decoder [J].
Ceroni, Paola ;
Bergamini, Giacomo ;
Balzani, Vincenzo .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2009, 48 (45) :8516-8518
[10]   Binding and photodissociation of CO in iron(II) complexes for application in positron emission tomography (PET) radiolabelling [J].
Child, Chloe R. ;
Kealey, Steven ;
Jones, Harriet ;
Miller, Philip W. ;
White, Andrew J. P. ;
Gee, Anthony D. ;
Long, Nicholas J. .
DALTON TRANSACTIONS, 2011, 40 (23) :6210-6215
1234