ENHANCEMENT OF PHOTOINDUCED CHARGE SEPARATION IN CYCLOMETALLATED PLATINUM (Ⅱ) COMPLEX-VIOLOGEN SYSTEM VIA NAFION MEMBRANE-SOLUTION INTERFACE

doi:10.7517/j.issn.1674-0475.2000.02.97

Abstract

Abstract: The photoinduced electron transfer from the excited state of cyclometallated platinum (Ⅱ) complex PtL₁L₂²⁺ (L₁=4 methoxyphenyl 6 phenyl 2,2’ bibyridine,L₂=pyridine) incorporated into Nafion membranes to propylviologen sulfonate (PVS⁰) in the surrounding solution has been examined by photochemical measurements.N,N’ tetramethylene 2,2’ bipyridinium (DQ²⁺) entrapped in the Nafion membranes is used as an electron relay.Luminescence quenching studies indicate that the quenching reaction of PtL₁L₂²⁺ with DQ²⁺ is both of dynamic and static nature.PtL₁L₂³⁺ generated from the luminescence quenching remains in the Nafion matrix,while DQ^+· migrates by an electron hopping mechanism to the Nafion water interface,where transfers an electron to PVS⁰ to produce PVS^-·.The negative charged PVS^-· is repelled into the bulk solution by the anionic Nafion surface.The isolation of the photoinduced oxidized species PtL₁L₂³⁺ in Nafion from the ultimate reduced species PVS^-· in solution prevents them from undergoing back electron transfer,and a long lived (up to a few days) charge separation state is achieved.

Key words: Nafion, cyclometallated platinum (Ⅱ) complex, viologen, photoinduced electron transfer, long lived charge separation

CLC Number:

O644

YI Xiu-yu, WU Li-zhu, TONG Zhen-he(TUNG Chen-Ho). ENHANCEMENT OF PHOTOINDUCED CHARGE SEPARATION IN CYCLOMETALLATED PLATINUM (Ⅱ) COMPLEX-VIOLOGEN SYSTEM VIA NAFION MEMBRANE-SOLUTION INTERFACE[J]. Imaging Science and Photochemistry, 2000, 18(2): 97-103.

References

[1] (a)Fox M A, Chanon M. Photoinduced Electron Transfer [M]. Elsevier: Amsterdam, 1988
(b)Pelizzetti E, Schiavello M. Photochemical Conversion and Storage of Solar Energy [M]. Kluwer Academic: Dordrecht, 1991
[2] (a)Moore T A, Gust D, Mathis P, et al. Photodriven charge separation in a carotenoporphyrin-quinone triad [J]. Nature(London), 1984,307:630
(b)Seta P, Bienvenue E, Moore A L, et al. Photodriven transmembrane charge separation and electron transfer by a carotenoporphyrin-quinone triad [J]. Nature (London), 1985,316:653
(c)Gust D, Moore T A. Mimicking photosynthesis [J]. Science, 1989,244:35
[3] (a)Willner I, Yang J M, Laane C, et al. The function of SiO₂ colloids in a photoinduced redox reactions. interfacial effects on the quenching, charge separation, and quantum yields [J]. J. Phys. Chem., 1981,85:3277
(b)Degani Y, Willner I. Photoinduced hydrogen evolution by a zwitterionic diquat electron acceptor. The functions of SiO₂ colloid in controlling the electron-transfer process [J]. J.Am.Chem.Soc., 1983,105:6228
[4] (a)Slama-Schwok A, Avnir D, Ottolenghi M. Photoinduced electron transfer mediated by a shuttling charge carrier between ruthenium and iridium trisbipyridyl complexes trapped in Sol-Gel glasses [J]. J. Am. Chem. Soc., 1991,113:3984
(b)Slama-Schwok A, Ottolenghi M, Avnir D. Long-lived photoinduced charge separation in a redox system trapped in a Sol-Gel glass [J]. Nature, 1992,355:240
[5] Krueger J S, Mayer J E, Mallouk T E. Long-lived light-induced charge separation in a zeolite L-based molecular triad [J]. J. Am. Chem. Soc., 1988,110:8232
[6] (a)Dutta P K, Turbeville W. Intrazeolitic photoinduced redox reactions between Ru(bpy)₃²⁺ and methylviologen [J]. J. Phys. Chem., 1992,96:9410
(b)Borja M, Dutta P K. Storage of light energy by photoelectron transfer across a sensitized zeolite-solution interface [J]. Nature, 1993,362:43
[7] Sykora M, Kincaid J R. Photochemical energy storage in a spatially organized zeolite-based photoredox system [J]. Nature, 1997,387:162
[8] (a)Komoroski R A, Mauritz K A. A sodium-23 nuclear magnetic resonance study of ionic mobility and contact ion pairing in a perfluorosulfonate ionomer [J]. J. Am. Chem. Soc., 1978,100:7487
(b)Lee P C, meisel D. Luminescence quenching in the cluster network of perfluorosulfonate membrane [J]. J. Am. Chem. Soc., 1980,102:5477
(c)Sondheimer S J, Bunce N J, Fyfe C A. Structure and chemistry of nafion-H: a fluorinated sulfonic acid polymer [J]. J. Macromol. Sci., Rev. Macromol. Chem. Phys., 1986,c26:353
[9] Gierke T D, Munn G E, Wilson F C. The morphology in nafion^* perfluorinated membrane products, as determined by wide- and small-angle X-ray studies [J]. J. Polym. Sci., Polym. Phys. Ed., 1981,19:1687
[10] Carraway E R, Demas J N, DeGraff B A, et al. Luminescence quenching mechanism for microheterogeneous systems [J]. Anal. Chem., 1991,63:332

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