Photochemistry and Photophysics of Coordination Compounds

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200 S. Campagna et al. to TiO2 [454], and (2) the dehydrogenation of hydroquinone to quinone, by means of two Ru chromophores coadsorbed on TiO2 at the anode of a photoelectrochemical cell, with molecular hydrogen produced at a platinizedplatinum cathode [455]. These fields have been recently reviewed and several details can be found in [342]. Quite recently photoinduced charge transfer between CdSe nanocrystal quantum dots and Ru(II) complexes has also been reported [456]. Interesting results, from the photocatalysis point of view, have been reported for other heterogeneous systems. For example, the sensitization of platinized layered metal oxide semiconductors with Ru(II) polypyridine dyes enabled photolysis of aqueous hydrogen iodide to molecular hydrogen and triiodide using visible light [457–459]. Photocatalytic water oxidation has been accomplished with good efficiency in a system based on [Ru(bpy)3] 2+ as the photosensitizer and using a colloidal solution of IrO2 as a catalyst [460, 461]. Ru(II) polypyridine complexes containing ligands which can be protonated/deprotonated have been extensively studied. Interesting effects of electronic coupling between metal centers in dinuclear systems with protonable/deprotonable bridging ligands have been reported [462–464], as well improved emissive properties in Ru(terpy)2-like complexes [188]. Quite interesting light-controlled electronic coupling between the Ru(II) centers of dinuclear systems has also been obtained by inserting photoisomerizable subunits with the bridging ligands [465, 466]. Finally, the recently published X-ray time-resolved spectra of [Ru(bpy)3] 2+ , obtained by different techniques [467–469], warrants recalling. These studies give information on the structural changes induced by excitation. Interestingly, they confirm the very small distortion of the 3 MLCT state in comparison with the ground state, as formerly predicted on the basis of other experimental results and theoretical arguments. Acknowledgements We acknowledge MIUR (PRIN projects nos. 2006034123 and 2006- 030320), the University of Bologna, and the University of Messina for financial support. We also wish to thank our colleagues F. Barigelletti, L. Hammarström, and C.A. Bignozzi for useful discussions. References 1. Juris A, Balzani V, Barigelletti F, Campagna S, Belser P, von Zelewsky A (1988) Coord Chem Rev 84:85 2. Balzani V, Juris A, Venturi M, Campagna S, Serroni S (1996) Chem Rev 96:759 3. Sauvage JP, Collin JP, Chambron JC, Guillerez S, Coudret C, Balzani V, Barigelletti F, De Cola L, Flamigni L (1994) Chem Rev 94:993 4. Meyer TJ (1986) Pure Appl Chem 58:1193 5. Crosby GA, Watts RJ, Carstens DHW (1970) Science 170:1195 6. Crosby GA (1975) Acc Chem Res 8:231
Photochemistry and Photophysics of Coordination Compounds: Ruthenium 201 7. Demas JN (1983) J Chem Educ 60:803 8. Chen Y, Meyer TJ (1998) Chem Rev 98:1439 9. Crosby GA (1976) Adv Chem Ser 150:149 10. Kober EM, Meyer TJ (1982) Inorg Chem 21:3967 11. Mandal K, Pearson TLD, Krug WP, Demas JN (1983) J Am Chem Soc 105:701 12. Rillema DP, Jones DS, Levy HA (1979) J Chem Soc Chem Commun, p 849 13. Orgel LE (1961) J Chem Soc 3683 14. Kalyanasundaram K (1982) Coord Chem Rev 46:159 15. Seddon EA, Seddon KR (1984) The chemistry of ruthenium, chap 15. Elsevier, Amsterdam 16. Watts RJ (1983) J Chem Educ 60:834 17. Balzani V, Carassiti V (1970) Photochemistry of coordination compounds. Academic, London 18. Adamson AW (1983) J Chem Educ 60:797 19. Fleischauer PD, Fleischauer P (1970) Chem Rev 70:199 20. DeArmond MK, Carlin CM (1981) Coord Chem Rev 36:325 21. DeArmond MK, Hanck KW, Wertz DW (1985) Coord Chem Rev 64:65 22. Ohsawa Y, DeArmond MK, Hanck KW, Morris DE (1983) J Am Chem Soc 105:6522 23. Ohsawa Y, Whangho MH, Hanck KW, DeArmond MK (1984) Inorg Chem 23:3426 24. Morris DE, Hanck KW, DeArmond MK (1983) J Am Chem Soc 105:3032 25. Elliott CM (1980) J Chem Soc Chem Commun, p 261 26. Heath GA, Yellowlees LJ, Braterman PS (1982) Chem Phys Lett 92:646 27. Ohsawa Y, DeArmond MK, Hanck KW, Moreland CG (1985) J Am Chem Soc 107:5383 28. Angel SM, DeArmond MK, Donohoe RJ, Hanck KW, Wertz DH (1984) J Am Chem Soc 106:3688 29. Dallinger RF, Woodruff WH (1979) J Am Chem Soc 101:4391 30. Omberg KM, Schoonover JR, Treadway JA, Leasure LM, Dyer RB, Meyer TJ (1997) J Am Chem Soc 119:7013 31. Balzani V, Bolletta F, Gandolfi MT, Maestri M (1978) Top Curr Chem 75:1 32. Lytle FE, Hercules DM (1969) J Am Chem Soc 91:253 33. Klassen DM, Crosby GA (1968) J Chem Phys 48:1853 34. Xie P, Chen YJ, Uddin J, Endicott JF (2005) J Phys Chem A 109:4671 35. Kober EM, Sullivan BP, Meyer TJ (1984) Inorg Chem 23:2098 36. Bensasson R, Salet C, Balzani V (1976) J Am Chem Soc 98:3722 37. Bensasson R, Salet C, Balzani V (1979) CR Acad Sci Paris 289B:41 38. Lachish U, Infelta PP, Grätzel M (1979) Chem Phys Lett 62:317 39. Creutz C, Chou M, Netzel TL, Okumura M, Sutin N (1980) J Am Chem Soc 102:1309 40. Bradley PC, Kress N, Hornberger BA, Dallinger RF, Woodruff WH (1981) J Am Chem Soc 103:7441 41. Brauenstein CH, Baker AD, Strekas TC, Gafney HD (1984) Inorg Chem 23:857 42. Demas JN, Crosby GA (1971) J Am Chem Soc 93:2841 43. Demas JN, Taylor DG (1979) Inorg Chem 18:3177 44. Bolletta F, Juris A, Maestri M, Sandrini D (1980) Inorg Chim Acta 44:L175 45. Harrigan RW, Crosby GA (1973) J Phys Chem 59:3468 46. Hager GD, Crosby GA (1975) J Am Chem Soc 97:7031 47. Hager GD, Watts RJ, Crosby GA (1975) J Am Chem Soc 97:7037 48. Hipps KW, Crosby GA (1975) J Am Chem Soc 97:7042 49. Crosby GA, Elfring WH Jr (1976) J Phys Chem 80:2206
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280 Topics in Current Chemistry Edi
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Photochemistry and Photophysics of
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Volume Editors Prof. Vincenzo Balza
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Topics in Current Chemistry Also Av
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X Preface nation Compounds. The ven
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Contents Photochemistry and Photoph
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258 Author Index Volumes 251-280 Be
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Subject Index Alkyne bridges 148 An
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Subject Index 273 Rh(III) cyclometa
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