Photoinduced electron-transfer within free base and zinc porphyrin containing poly(amide) dendrimers

Journal of Physical Chemistry B

Volumn 105, Issue 42, 2001, Pages 10175-10188

  Rajesh, Cheruvallil S ^a   Capitosti, Gregory J ^a   Cramer, Susan J ^a   Modarelli, David A ^a  

^a UNIVERSITY OF AKRON   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

INTRAMOLECULAR ELECTRON-TRANSFER MECHANISMS;

ABSORPTION SPECTROSCOPY; CHARGE TRANSFER; CONFORMATIONS; DENDRIMERS; ELECTRONS; FLUORESCENCE; MOLECULAR DYNAMICS; PHOTOSYNTHESIS; QUENCHING; RATE CONSTANTS;

PORPHYRINS;

EID: 0035950773     PISSN: 10895647     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp010575y     Document Type: Article

References (115)

1. For recent reviews of the events occurring in the photosynthetic reaction center and light-harvesting complex, see: (a) Arnett, D.C.; Moser, C.C.; Dutton, P.L.; Scherer, N.F. J. Phys. Chem. B 1999, 103, 2014-2032; (b) Pullerits, T.; Sundström, V. Acc. Chem. Res. 1996, 29, 381-389.
2. For recent reviews of the events occurring in the photosynthetic reaction center and light-harvesting complex, see: (a) Arnett, D.C.; Moser, C.C.; Dutton, P.L.; Scherer, N.F. J. Phys. Chem. B 1999, 103, 2014-2032; (b) Pullerits, T.; Sundström, V. Acc. Chem. Res. 1996, 29, 381-389.
3. (a) Yachandra, V.K.; Saner, K.; Klein, M.P. Chem. Rev. 1996, 96, 2927-2950.
4. (a) Rüttinger, W.; Dismukes, G.C. Chem. Rev. 1997, 97, 1-24.
5. (c) Debus, R.J. Biochim. Biophys. Acta 1992, 1102, 269-352.
6. (a) Wasielewski, M.R. Chem. Rev. 1992, 92, 435-461.
7. (b) Gust, D.; Moore, T.A. Science 1989, 244, 35-41.
8. (c) Meyer, T.J. Acc. Chem. Res. 1989, 22, 163.
9. (c) Photoinduced Electron Transfer, Parts A-D; Fox, M.A.; Chanon, M., Eds.; Amsterdam; Elsevier Science Publishers B. V., 1988.
10. For recent reviews of electron-transfer in related systems, see: Barbara, P.F.; Meyer, T.J.; Ratner, M.A. J. Phys. Chem. 1996, 100, 13 148-13 168.; Sauvage, J.P.; Collin, J.P.; Chambron, J.C.; Guillerez, S.; Coudret, C.; Balzani, V.; Barigelletti, F.; Decola, L.; Flamigni, L. Chem. Rev. 1994, 94, 993-1019.
11. For recent reviews of electron-transfer in related systems, see: Barbara, P.F.; Meyer, T.J.; Ratner, M.A. J. Phys. Chem. 1996, 100, 13 148-13 168.; Sauvage, J.P.; Collin, J.P.; Chambron, J.C.; Guillerez, S.; Coudret, C.; Balzani, V.; Barigelletti, F.; Decola, L.; Flamigni, L. Chem. Rev. 1994, 94, 993-1019.
12. O'Regan, B.; Graetzel, M. Nature 1991, 353, 737. Balzani, V.; Campagna, S.; Denti, G.; Juris, A.; Serroni, S.; Venturi, M. Acc. Chem. Res. 1998, 31, 26-34.
13. O'Regan, B.; Graetzel, M. Nature 1991, 353, 737. Balzani, V.; Campagna, S.; Denti, G.; Juris, A.; Serroni, S.; Venturi, M. Acc. Chem. Res. 1998, 31, 26-34.
14. (a) Levanon, H.; Galili, T.; Regev, A.; Wiederrecht, G.P.; Svec, W.A.; Wasielewski, M.R. J. Am. Chem. Soc. 1998, 120, 6366-6373.
15. (b) Gaines, G.L. III; O'Neil, M.P.; Svec, W.A.; Niemczyk, M.P.; Wasielewski, M.R. J. Am. Chem. Soc. 1991, 113, 719-721.
16. (c) Wasielewski, M.R.; Niemczyk, M.P.; Svec, W.A.; Pewitt, E.B. J. Am. Chem. Soc. 1985, 107, 5562-5563.
17. (d) Wasielewski, M.R.; Niemczyk, M.P.; Svec, W.A.; Pewitt, E.B. J. Am. Chem. Soc. 1985, 107, 1080-1082.
18. Wasielewski, M.R.; Niemczyk, M.P. J. Am. Chem. Soc. 1984, 106, 5043-5045.
19. (a) Gust, D.; Moore, T.A. In The Porphyrin Handbook: Electron Transfer, Vol. 8; Kadish, K.M., Smith, K.M., Guilard, R., Eds.; Academic Press: San Diego, 2000.
20. (b) Kuciauskaas, D.; Liddell, P.A.; Lin, S.; Johnson, T.E.; Weghorn, S.J.; Lindsey, J.S.; Moore, A.L.; Moore, T.A.; Gust, D. J. Am. Chem. Soc. 1999, 121, 8604-8614.
21. (c) Steinberg-Yfrach, G.; Rigand, J.-L.; Durantini, E.N.; Moore, A.L.; Gust, D.; Moore, T.A. Nature (London) 1998, 392, 479-482.
22. (d) Steinberg-Yfrach, G.; Liddell, P.A.; Hung, S.-C.; Moore, A.L.; Gust, D.; Moore, T.A. Nature (London) 1997, 385, 239-241.
23. (e) Gust, D.; Moore, T.A.; Moore, A.L. Pure Appl. Chem. 1998, 70, 2189-2200.
24. (f) Maniga, N.I.; Sumida, J.P.; Stone, S.; Moore, A.L.; Moore, T.A.; Gust, D. J. Porphyrins Phthalocyanines 1999, 3, 32-44.
25. (g) Sumida, J.P.; Liddell, P.A.; Lin, S.; Macpherson, A.N.; Seely, G.R.; Moore, A.L.; Moore, T.A.; Gust, D. J. Phys. Chem. A 1998, 102, 5512-5519.
26. (a) Lammi, R.K.; Ambroise, A.; Balasubramian, T.; Wagner, R.W.; Bocian, D.F.; Holten, D.; Lindsey, J.S. J. Am. Chem. Soc. 2000, 122, 7579-7591.
27. (b) Rao, P.D.; Dhanalekshmi, S.; Littler, B.J.; Lindsey, J.S. J. Org. Chem. 2000, 65, 7323-7344.
28. (c) Li, J.; Ambroise, A.; Yang, S.I.; Diers, J.R.; Seth, J.; Wack, C.R.; Bocian, D.F.; Holten, D.; Lindsey, J.S. J. Am. Chem. Soc. 1999, 121, 8927-8940.
29. (d) Li, J.; Diers, J.R.; Seth, J.; Yang, S.I.; Bocian, D.F.; Holten, D.; Lindsey, J.S. J. Org. Chem. 1999, 64, 9090-9100.
30. (e) Yang, S.I.; Seth, J.; Balasubramanian, T.; Kim, D.; Lindsey, J.S.; Holten, D.; Bocian, D.F. J. Am. Chem. Soc. 1999, 121, 4008-4018.
31. (f) Shediac, R.; Gray, M.H.B.; Uyeda, H.T.; Johnson, R.C.; Hupp, J.T.; Angiolillo, P.J.; Therien, M.J. J. Am. Chem. Soc. 2000, 122, 7017-7033.
32. (g) Iovine, P.M.; Kellett, M.A.; Redmore, N.P.; Therien, M.J. J. Am. Chem. Soc. 2000, 122, 8717-8727.
33. (h) Kumble, R.; Palese, S.; Lin, V.S.-Y.; Therien, M.J.; Hochstrasser, R.M. J. Am. Chem. Soc. 1998, 120, 11 489-11 498.
34. (i) Hyslop, A.G.; Therien, M.J. Inorg. Chim. Acta 1998, 275-276, 427-434.
35. (j) Priyadarshy, S.; Therien, M.J.; Beratan, D.N. J. Am. Chem. Soc. 1996, 118, 1497-503.
36. a) Harriman, A.; Hissler, M.; Trompette, O.; Ziessel, R. J. Am. Chem. Soc. 1999, 121, 2516-2525.
37. (b) Harriman, A.; Odobel, F.; Sauvage, J.-P. J. Am. Chem. Soc. 1995, 117, 9461-9472.
38. (c) Collin, J.-P.; Harriman, A.; Heitz, V.; Odobel, F.; Sauvage, J.-P. J. Am. Chem. Soc. 1994, 116, 5679-5690.
39. (d) Brun, A.M.; Harriman, A.; Heitz, V.; Sanvage, J.-P. J. Am. Chem. Soc. 1991, 113, 8657-8663.
40. (e) Dixon, I.M.; Collin, J.-P.; Sauvage, J.-P.; Barigelletti, F.; Flamigni, L. Angew. Chem., Int. Ed. Engl. 2000, 39, 1292-1295.
41. (f) Andersson, M.; Linke, M.; Chambron, J.-C.; Davidsson, J.; Heitz, V.; Sauvage, J.-P.; Hammarstroem, L. J. Am. Chem. Soc. 2000, 122, 3526-3527.
42. (a) Connolly, J.S.; Hurley, J.K.; Bell, W.L.; Marsh, K.L. In Supramolecular Photochemistry; Balzani, V., Ed.; D. Reidel Publishing Company: Boston, 1987.
43. (b) Schmidt, J.A.; McIntosh, A.R.; Weedon, A.C.; Bolton, J.R.; Connolly, J.S.; Hurley, J.K.; Wasielewski, M.R. J. Am. Chem. Soc. 1988, 110, 1733-1740.
44. (c) Kong, J.L.Y.; Spears, K.G.; Loach, P.A. Photochem. Photobiol. 1982, 35, 545-553.
45. (d) McIntosh, A.R.; Siemiarczuk, A.; Botton, J.R.; Stillman, M.J.; Ho, T.-F.; Weedon, A.C. J. Am. Chem. Soc. 1983, 105, 7215-7223.
46. (e) Siemiarczuk, A.; McIntosh, A.R.; Ho, T.-F.; Stillman, M.J.; Roach, K.J.; Weedon, A.C.; Bolton, J.R.; Connolly, J.S. J. Am. Chem. Soc. 1983, 105, 7224-7230.
47. (a) Turró, C.; Chang, C.K.; Leroi, G.E.; Cukier, R.I.; Nocera, D.G. J. Am. Chem. Soc. 1992, 114, 4013-4015.
48. (b) Roberts, J.A.; Kirby, J.P.; Nocera, D.G. J. Am. Chem. Soc. 1995, 117, 8051-8052.
49. (c) Flamigni, L.; Armaroli, N.; Barigelletti, F.; Chambron, J.-C.; Sauvage, J.-P.; Solladie, N. New J. Chem. 1999, 23, 1151-1158.
50. (d) Heleg-Shabtai, V.; Gabriel, T.; Willner, I. J. Am. Chem. Soc. 1999, 121, 3220-3221.
51. (e) Willner, I.; Joselevich, E. J. Phys. Chem. B 1999, 103, 9262-9268.
52. (f) Willner, I.; Kaganer, E.; Joselevich, E.; Durr, H.; David, E.; Gunter, M.J.; Johnston, M.R. Coord. Chem. Rev. 1998, 171, 261-285.
53. (g) Kaganer, E.; Joselevich, E.; Willner, I.; Chen, Z.; Gunter, M.J.; Gayness, T.P.; Johnson, M.R. J. Phys. Chem. B 1998, 102, 1159-1165.
54. (a) Fox, M.A. Acc. Chem. Res. 1999, 32, 201-207.
55. (b) Kaschak, D.M.; Johnson, S.A.; Waraksa, C.C.; Pogue, J.; Mallouk, T.E. Coord. Chem. Rev. 1999, 185, 5-186, 403-416.
56. (b) Jiang, B.;; Yang, S.W.; Bailey, S.L.; Hermans, L.G.; Niver, R.A.; Bolcar, M.A.; Jones, Jr. W.E. Coord. Chem. Rev. 1998, 171, 365-386.
57. (d) Fossum, R.D.; Fox, M.A. J. Phys. Chem. B 1997, 101, 6384-6393.
58. (e) Fossum, R.D.; Fox, M.A. Polym. Mater. Sci. Eng. 1997, 76, 389-390.
59. (f) Watkins, D.M.; Fox, M.A. J. Am. Chem. Soc. 1994, 116, 6441-6442.
60. (g) Webber, S.E. Chem. Rev. 1990, 90, 1469.
61. (a) Bosman, A.W.; Janssen, H.M.; Meijer, E.W. Chem. Rev. 1999, 99, 1665-1688.
62. (b) Newkome, G.R.; He, E.; Moorefield, C.N. Chem. Rev. 1999, 99, 1689-1746.
63. (c) Zeng, F.; Zimmerman, S.C. Chem. Rev. 1997, 97, 1681.
64. (a) Matos, M.S.; Hofkens, J.; Verheijen, W.; De Schryver, F.C.; Hecht, S.; Pollak, K.W.; Fréchet, J.M.J.; Forier, B.; Dehaen, W. Macromolecules 2000, 33, 2967-2973.
65. (b) Adronov, A.; Gilat, S.L.; Fréchet, J.M.J.; Ohta, K.; Neuwahl, F.V.R.; Fleming, G.R. J. Am. Chem. Soc. 2000, 122, 1175-1185.
66. (c) Adronov, A.; Fréchet, J.M.J. Chem. Commun. 2000, 1701-1710.
67. (c) Xu, Z.; Moore, J.S. Acta Polym. 1994, 45, 83-87.
68. (d) Devadoss, C.; Bharati, P.; Moore, J.S. J. Am. Chem. Soc. 1996, 118, 9635-9644.
69. (e) Shortreed, M.R.; Swallen, S.F.; Shi, Z.-Y.; Tan, W.; Xu, Z.; Devadoss, C.; Moore, J.S.; Kopelman, R. J. Phys. Chem. B 1997, 101, 6318-6322.
70. (f) Balzani, V.; Campagna, S.; Denti, G.; Juris, A.; Serroni, S.; Venturi, M. Acc. Chem. Res. 1998, 31, 26-34.
71. (g) Zhou, X.; Tyson, D.S.; Castellano, F.N. Angew. Chem. Int. Ed. Engl. 2000, 39, 4301-4305.
72. Bosman, A.W.; Schenning, A.P.H.J.; Meijer, E.W. J. Phys. Chem. B 2000, 104, 2596-2606.
73. Recker, J.; Tomcik, D.J.; Parquette, J.R. J. Am.. Chem. Soc. 2000, 122, 10 298-10 307. Huang, B.; Parquette, J.R. Org. Lett. 2000, 2, 239-242.
74. Recker, J.; Tomcik, D.J.; Parquette, J.R. J. Am.. Chem. Soc. 2000, 122, 10 298-10 307. Huang, B.; Parquette, J.R. Org. Lett. 2000, 2, 239-242.
75. (a) Newkome, G.R.; Lin, X. Macromolecules 1991, 24, 1443-1444.
76. (b) Newkome, G.R.; Lin, X.; Weis, C.D. Tetrahedron: Asymmetry 1991, 2, 957-960.
77. Capitosti, G.C.; Cramer, S.C.; Rajesh, C.S.; Modarelli, D.A. Org. Lett. 2001, 3, 1645-1648.
78. Rajesh, C.S.; Capitosti, G.C.; Cramer, S.C.; Wellons, M.; Dobroshi, D.; Pett, V.B.; Modarelli, D.A., manuscript in preparation.
79. Dandliker, P.J.; Diederich, F.; Zingg, A.; Gisselbrecht, J.-P.; Gross, M.; Louati, A.; Sanford, E. Helv. Chim. Acta 1997, 80, 1773-1801.
80. (a) Mansfield, M.L. Macromolecules 2000, 33, 8043-8049.
81. (b) Bhalgat, M.K.; Roberts, J.C. Eur. Polym. J. 2000, 36, 647-651.
82. (c) Cavallo, L.; Fraternali, F. Chem. Eur. J. 1998, 4, 927-934.
83. (d) Boris, D.; Rubinstein, M. Macromolecules 1996, 29, 7251-7260.
84. (e) Murat, M.; Grest, G.S. Macromolecules 1996, 29, 1278.
85. (f) Mansfield, M. Polymer 1994, 35, 1827.
86. (g) Lescanec, R.L.; Muthukumar, M. Macromolecules 1990, 23, 2280.
87. -1 of one another. Several of these calculations have either one anthraquinone positioned above the porphyrin, or one anthraquinone positioned above the porphyrin and one below. In addition, the calculations reveal many conformations having anthraquinone-anthraquinone pi-stacking interactions (ref 25). (a) MacroModel: Mohamadi, F.; Richards, N.G.J.; Guida, W.C.; Liskamp, R.; Lipton, M.; Caufield, C.; Chang, G.; Hendrickson, T.; Still, W.C. J. Comput. Chem. 1990, 11, 440. (b) Amber-Weiner, S.C.; Kollman, P.A.; Case, D.A.; Singh, C.U.; Ghio, C.; Alagona, G.; Profeta, S.; Weiner, P. J. Am. Chem. Soc. 1984, 106, 765-784. (c) Weiner, S.C.; Kollman, P.A.; Nguyen, D.T.; Case, D.A. J. Comp. Chem. 1986, 7, 230-252.
88. -1 of one another. Several of these calculations have either one anthraquinone positioned above the porphyrin, or one anthraquinone positioned above the porphyrin and one below. In addition, the calculations reveal many conformations having anthraquinone-anthraquinone pi-stacking interactions (ref 25). (a) MacroModel: Mohamadi, F.; Richards, N.G.J.; Guida, W.C.; Liskamp, R.; Lipton, M.; Caufield, C.; Chang, G.; Hendrickson, T.; Still, W.C. J. Comput. Chem. 1990, 11, 440. (b) Amber-Weiner, S.C.; Kollman, P.A.; Case, D.A.; Singh, C.U.; Ghio, C.; Alagona, G.; Profeta, S.; Weiner, P. J. Am. Chem. Soc. 1984, 106, 765-784. (c) Weiner, S.C.; Kollman, P.A.; Nguyen, D.T.; Case, D.A. J. Comp. Chem. 1986, 7, 230-252.
89. -1 of one another. Several of these calculations have either one anthraquinone positioned above the porphyrin, or one anthraquinone positioned above the porphyrin and one below. In addition, the calculations reveal many conformations having anthraquinone-anthraquinone pi-stacking interactions (ref 25). (a) MacroModel: Mohamadi, F.; Richards, N.G.J.; Guida, W.C.; Liskamp, R.; Lipton, M.; Caufield, C.; Chang, G.; Hendrickson, T.; Still, W.C. J. Comput. Chem. 1990, 11, 440. (b) Amber-Weiner, S.C.; Kollman, P.A.; Case, D.A.; Singh, C.U.; Ghio, C.; Alagona, G.; Profeta, S.; Weiner, P. J. Am. Chem. Soc. 1984, 106, 765-784. (c) Weiner, S.C.; Kollman, P.A.; Nguyen, D.T.; Case, D.A. J. Comp. Chem. 1986, 7, 230-252.
90. (a) Kao, H.-M.; Stefanescu, A.D.; Wooley, K.L.; Schaefer, J. Macromolecules 2000, 33, 6214-6216.
91. (b) Bangher, A.H.; Goetz, J.M.; McDowell, L.M.; Huang, H.; Wooley, K.L.; Schaefer, J. Biophys. J. 1998, 75, 2574-2576.
92. (c) Tasaki, K.; Klug, C.A.; Wooley, K.L.; Schaefer, J. Annu. Tech. Conf.-Soc. Plast. Eng. 1997, 55th(Vol. 2), 2249-2252.
93. (d) Wooley, K.L.; Klug, C.A.; Tasaki, K.; Schaefer, J. J. Am. Chem. Soc. 1997, 119, 53-58.
94. Staab, H.A.; Voit, G.; Weiser, J.; Futscher, M. Chem. Ber. 1992, 125, 2303-2310.
95. Staab, H.A.; Weiser, J.; Baumann, E. Chem. Ber. 1992, 125, 2275-2283.
96. Nappa, M.; Valentine, J.S. J. Am. Chem. Soc. 1978, 100, 5075-5080. See also: D'Souza, F.; Hsieh, Y.-Y.; Deviprasad, G.R. Inorg. Chem. 1996, 35, 5747-5749.; D'Souza, F.; Deviprasad, G.R.; Rahman, M.S.; Choi, J.-P. Inorg. Chem. 1999, 38, 2157-2160.
97. Nappa, M.; Valentine, J.S. J. Am. Chem. Soc. 1978, 100, 5075-5080. See also: D'Souza, F.; Hsieh, Y.-Y.; Deviprasad, G.R. Inorg. Chem. 1996, 35, 5747-5749.; D'Souza, F.; Deviprasad, G.R.; Rahman, M.S.; Choi, J.-p. Inorg. Chem. 1999, 38, 2157-2160.
98. Nappa, M.; Valentine, J.S. J. Am. Chem. Soc. 1978, 100, 5075-5080. See also: D'Souza, F.; Hsieh, Y.-Y.; Deviprasad, G.R. Inorg. Chem. 1996, 35, 5747-5749.; D'Souza, F.; Deviprasad, G.R.; Rahman, M.S.; Choi, J.-p. Inorg. Chem. 1999, 38, 2157-2160.
99. Frisch, M.J.; Trucks, G.W.; Schlegel, H.B.; Scuseria, G.E.; Robb, M.A.; Cheeseman, J.R.; Zakrzewski, V.G.; Montgomery, J.A., Jr.; Stratmann, R.E.; Burant, J.C.; Dapprich, S.; Millam, J.M.; Daniels, A.D.; Kudin, K.N.; Strain, M.C.; Farkas, O.; Tomasi, J.; Barone, V.; Cossi, M.; Cammi, R.; Mennucci, B.; Pomelli, C.; Adamo, C.; Clifford, S.; Ochterski, J.; Petersson, G.A.; Ayala, P.Y.; Cui, Q.; Morokuma, K.; Malick, D.K.; Rabuck, A.D.; Raghavachari, K.; Foresman, J.B.; Cioslowski, J.; Ortiz, J.V.; Stefanov, B.B.; Liu, G.; Liashenko, A.; Piskorz, P.; Komaromi, I.; Gomperts, R.; Martin, R.L.; Fox, D.J.; Keith, T.; Al-Laham, M.A.; Peng, C.Y.; Nanayakkara, A.; Gonzalez, C.; Challacombe, M.; Gill, P.M.W.; Johnson, B.G.; Chen, W.; Wong, M.W.; Andres, J.L.; Head-Gordon, M.; Replogle, E.S.; Pople, J.A. Gaussian 98, revision A.6; Gaussian, Inc.: Pittsburgh, PA, 1998.
100. Murrell, J.N. The Theory of the Electronic Spectra of Organic Molecules; Wiley: New York, 1963.
101. See, for example, Newkome, G.R.; Güther, R.; Moorefield, C.N.; Cardullo, F.; Echegoyen, L.; Pérez-Cordero, E.; Luftmann, H. Angew. Chem., Int. Ed. Engl. 1995, 34, 2023-2026 and Newkome, G.R.; Narayanan, V.V.; Echegoyen, L.; Pérez-Cordero, E.; Luftmann, H. Mucromolecules 1997, 30, 5187-5159, Deiderich Helv. Chim. Acta 1997, 80, 1773-1801).
102. See, for example, Newkome, G.R.; Güther, R.; Moorefield, C.N.; Cardullo, F.; Echegoyen, L.; Pérez-Cordero, E.; Luftmann, H. Angew. Chem., Int. Ed. Engl. 1995, 34, 2023-2026 and Newkome, G.R.; Narayanan, V.V.; Echegoyen, L.; Pérez-Cordero, E.; Luftmann, H. Mucromolecules 1997, 30, 5187-5159, Deiderich Helv. Chim. Acta 1997, 80, 1773-1801).
103. See, for example, Newkome, G.R.; Güther, R.; Moorefield, C.N.; Cardullo, F.; Echegoyen, L.; Pérez-Cordero, E.; Luftmann, H. Angew. Chem., Int. Ed. Engl. 1995, 34, 2023-2026 and Newkome, G.R.; Narayanan, V.V.; Echegoyen, L.; Pérez-Cordero, E.; Luftmann, H. Mucromolecules 1997, 30, 5187-5159, Deiderich Helv. Chim. Acta 1997, 80, 1773-1801).
104. 1/2 values of 1.28, 0.95 and -1.28 V have been obtained vs SCE (Brown, G.M.; Hopf, F.R.; Ferguson, J.A.; Meyer, T.J.; Whitten, D.G. J. Am. Chem. Soc. 1973, 95, 5939-5942. Chen, H.L.; Ellis, P.E.; Wijesekera, T.; Hagan, T.E.; Groh, S.E.; Lyons, J.E.; Ridge, D.P. J. Am. Chem. Soc. 1994, 116, 1086-1089.), in good agreement with our results (1.31, 0.97, -1.25 V) under the same conditions. Using the silver reference electrodes, we have determined very similar values to Ravikanth, M.; Chandrashekar, T.K. J. Photochem. Photobiol. A. 1993, 74, 181-187.; Ravikanth, M.; Chandrashekar, T.K. J. Ind. Chem. Soc. 1993, 70, 1023-1034.; Ravikanth, M.; Reddy, D.; Chandrashekar, T.K. J. Chem. Soc., Dalton Trans. 1993, 1137-1141.
105. 1/2 values of 1.28, 0.95 and -1.28 V have been obtained vs SCE (Brown, G.M.; Hopf, F.R.; Ferguson, J.A.; Meyer, T.J.; Whitten, D.G. J. Am. Chem. Soc. 1973, 95, 5939-5942. Chen, H.L.; Ellis, P.E.; Wijesekera, T.; Hagan, T.E.; Groh, S.E.; Lyons, J.E.; Ridge, D.P. J. Am. Chem. Soc. 1994, 116, 1086-1089.), in good agreement with our results (1.31, 0.97, -1.25 V) under the same conditions. Using the silver reference electrodes, we have determined very similar values to Ravikanth, M.; Chandrashekar, T.K. J. Photochem. Photobiol. A. 1993, 74, 181-187.; Ravikanth, M.; Chandrashekar, T.K. J. Ind. Chem. Soc. 1993, 70, 1023-1034.; Ravikanth, M.; Reddy, D.; Chandrashekar, T.K. J. Chem. Soc., Dalton Trans. 1993, 1137-1141.
106. 1/2 values of 1.28, 0.95 and -1.28 V have been obtained vs SCE (Brown, G.M.; Hopf, F.R.; Ferguson, J.A.; Meyer, T.J.; Whitten, D.G. J. Am. Chem. Soc. 1973, 95, 5939-5942. Chen, H.L.; Ellis, P.E.; Wijesekera, T.; Hagan, T.E.; Groh, S.E.; Lyons, J.E.; Ridge, D.P. J. Am. Chem. Soc. 1994, 116, 1086-1089.), in good agreement with our results (1.31, 0.97, -1.25 V) under the same conditions. Using the silver reference electrodes, we have determined very similar values to Ravikanth, M.; Chandrashekar, T.K. J. Photochem. Photobiol. A. 1993, 74, 181-187.; Ravikanth, M.; Chandrashekar, T.K. J. Ind. Chem. Soc. 1993, 70, 1023-1034.; Ravikanth, M.; Reddy, D.; Chandrashekar, T.K. J. Chem. Soc., Dalton Trans. 1993, 1137-1141.
107. 1/2 values of 1.28, 0.95 and -1.28 V have been obtained vs SCE (Brown, G.M.; Hopf, F.R.; Ferguson, J.A.; Meyer, T.J.; Whitten, D.G. J. Am. Chem. Soc. 1973, 95, 5939-5942. Chen, H.L.; Ellis, P.E.; Wijesekera, T.; Hagan, T.E.; Groh, S.E.; Lyons, J.E.; Ridge, D.P. J. Am. Chem. Soc. 1994, 116, 1086-1089.), in good agreement with our results (1.31, 0.97, -1.25 V) under the same conditions. Using the silver reference electrodes, we have determined very similar values to Ravikanth, M.; Chandrashekar, T.K. J. Photochem. Photobiol. A. 1993, 74, 181-187.; Ravikanth, M.; Chandrashekar, T.K. J. Ind. Chem. Soc. 1993, 70, 1023-1034.; Ravikanth, M.; Reddy, D.; Chandrashekar, T.K. J. Chem. Soc., Dalton Trans. 1993, 1137-1141.
108. 1/2 values of 1.28, 0.95 and -1.28 V have been obtained vs SCE (Brown, G.M.; Hopf, F.R.; Ferguson, J.A.; Meyer, T.J.; Whitten, D.G. J. Am. Chem. Soc. 1973, 95, 5939-5942. Chen, H.L.; Ellis, P.E.; Wijesekera, T.; Hagan, T.E.; Groh, S.E.; Lyons, J.E.; Ridge, D.P. J. Am. Chem. Soc. 1994, 116, 1086-1089.), in good agreement with our results (1.31, 0.97, -1.25 V) under the same conditions. Using the silver reference electrodes, we have determined very similar values to Ravikanth, M.; Chandrashekar, T.K. J. Photochem. Photobiol. A. 1993, 74, 181-187.; Ravikanth, M.; Chandrashekar, T.K. J. Ind. Chem. Soc. 1993, 70, 1023-1034.; Ravikanth, M.; Reddy, D.; Chandrashekar, T.K. J. Chem. Soc., Dalton Trans. 1993, 1137-1141.
109. 1/2 values of 1.12 and 0.800 V have been obtained vs SCE (See ref 28), in good agreement with our results (1.10 and 0.81 V) under the same conditions. Using the silver reference electrodes, we have determined very similar values to Ravikanth, M.; Chandrashekar, T.K. J. Photochem. Photobiol. A. 1993, 74, 181-187.
110. El-Kasmi, A.; Lexa, D.; Maillard, P.; Momenteau, M.; Savéant, J.M. J. Am. Chem. Soc. 1991, 113, 1586-1595.
111. Kadish, K.M.; Sazou, D.; Maiya, G.B.; Han, B.C.; Liu, Y.M.; Saoiabi, A.; Ferhat, M.; Guilard, R. Inorg. Chem. 1989, 28, 2542-2547.
112. Gust, D.; Moore, T.A.; Moore, A.L.; Kang, H.K.; DeGraziano, J.M.; Liddell, P.A.; Seely, G.R. J. Phys. Chem. 1993, 97, 13 637-13 642.
113. Strachan, J.P.; Gentemann, J.S.; Kalsbeck, W.A.; Lindsey, J.S.; Holten, D.; Bocian, D.F. J. Am. Chem. Soc. 1997, 119, 11 191.
114. Kim, J.B.; Leonard, J.J.; Longo, F.R. J. Am. Chem. Soc. 1972, 94, 3986.
115. MacSpartan 4.0, Wavefunction, Inc.; 18401 Von Karman Ave., #370. Irvine, CA 92715.