Mono- and bimetallic Ir(iii) based catalysts for the homogeneous photocatalytic reduction of CO2under visible light irradiation. New insights into catalyst deactivation

作者: Richard O Reithmeier , Simon Meister , Bernhard Rieger , Armin Siebel , Martin Tschurl

DOI: 10.1039/C4DT01717J

关键词:

摘要: Mononuclear iridium(III) complexes [Ir(mppy)(tpy)X] (mppy = 4-methyl-2-phenylpyridine, X Cl, I) and binuclear analogues with various bis(2-phenylpyridin-4-yl) bridging ligands were synthesized characterized by their spectroscopic electrochemical properties. Kinetic measurements concerning the photocatalytic two electron reduction of CO2 to CO investigated in order determine influence intermolecular interactions between active centers. A detailed comparison monometallic bimetallic indicates an enhanced lifetime (TON) covalently linked complexes, causing increased overall conversion CO2. Additionally deactivation pathways catalysts are examined.

参考文章(41)
Ram Sahai, D. Paul Rillema, Randy Shaver, Shawn Van Wallendael, Donald C. Jackman, Massoud Boldaji, Complexes of ruthenium(II) with (2,2'-bipyrimidine)tricarbonylchlororhenium and {benzo[1,2-6:3,4-b':5,6-b"]tripyrazine}hexacarbonyldichloridirhenium as ligands: syntheses and redox and luminescence properties Inorganic Chemistry. ,vol. 28, pp. 1022- 1028 ,(1989) , 10.1021/IC00305A008
Kazuhide Koike, Sayoko Naito, Shunsuke Sato, Yusuke Tamaki, Osamu Ishitani, Architecture of supramolecular metal complexes for photocatalytic CO2 reduction: III: Effects of length of alkyl chain connecting photosensitizer to catalyst Journal of Photochemistry and Photobiology A-chemistry. ,vol. 207, pp. 109- 114 ,(2009) , 10.1016/J.JPHOTOCHEM.2008.12.014
H. J. Kuhn, S. E. Braslavsky, R. Schmidt, Chemical actinometry (IUPAC Technical Report) Pure and Applied Chemistry. ,vol. 76, pp. 2105- 2146 ,(2004) , 10.1351/PAC200476122105
Marc Lepeltier, Terence Kwok-Ming Lee, Kenneth Kam-Wing Lo, Loic Toupet, Hubert Le Bozec, Véronique Guerchais, Synthesis and Photophysical Properties of Bis-Cyclometallated Iridium(III)–Styryl Complexes and Their Saturated Analogues European Journal of Inorganic Chemistry. ,vol. 2007, pp. 2734- 2747 ,(2007) , 10.1002/EJIC.200700042
D. Behar, T. Dhanasekaran, P. Neta, C. M. Hosten, D. Ejeh, P. Hambright, Etsuko Fujita, Cobalt Porphyrin Catalyzed Reduction of CO2. Radiation Chemical, Photochemical, and Electrochemical Studies Journal of Physical Chemistry A. ,vol. 102, pp. 2870- 2877 ,(1998) , 10.1021/JP9807017
Mirco G. Colombo, Andreas Hauser, Hans U. Guedel, Evidence for strong mixing between the LC and MLCT excited states in bis(2-phenylpyridinato-C2,N')(2,2'-bipyridine)iridium(III) Inorganic Chemistry. ,vol. 32, pp. 3088- 3092 ,(1993) , 10.1021/IC00066A020
Shawn Van Wallendael, Randy J. Shaver, D. Paul Rillema, B. J. Yoblinski, Michael Stathis, Thomas F. Guarr, Ground-state and excited-state properties of monometallic and bimetallic complexes based on rhenium(I) tricarbonyl chloride : effect of an insulating vs a conducting bridge Inorganic Chemistry. ,vol. 29, pp. 1761- 1767 ,(1990) , 10.1021/IC00334A033
Hisao Hori, Frank P.A. Johnson, Kazuhide Koike, Osamu Ishitani, Takashi Ibusuki, Efficient photocatalytic CO2 reduction using [Re(bpy) (CO)3{P(OEt)3}]+ Journal of Photochemistry and Photobiology A-chemistry. ,vol. 96, pp. 171- 174 ,(1996) , 10.1016/1010-6030(95)04298-9