Electrocatalytic Reduction of Dioxygen by Diruthenium Cofacial Diporphyrins Axially-Bound to a Gold-Supported, Self-Assembled Monolayer

Inorganic Chemistry

Volumn 35, Issue 7, 1996, Pages 1751-1752

  Collman, James P ^a   Ennis, Matthew S ^a   Offord, David A ^a   Chng, Leng Leng ^a   Griffin, John H ^a  

^a STANFORD UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000145249     PISSN: 00201669     EISSN: None     Source Type: Journal    
DOI: 10.1021/ic950734q     Document Type: Article

References (21)

1. Schiffrin, D J. Electrochemistry 1983, 8, 126-170.
2. Collman, J. P.; Wagenknecht, P. S.; Hutchison, J. E. Angew. Chem., Int. Ed. Engl. 1994, 33, 1537-1554.
3. DPA = 1,8-bis[5-(2,8,13,17-tetraethyl-3,7,12,18-tetramethyl)porphynnyl]anthracene. DPS = 1,8-bis[5-(2,8,13,17-tetraethyl-3,7,12,18-tetramethyl)porphyrinyl]biphenylene. Chang, C. K.; Abdalmuhdi, I. J. Org. Chem. 1983, 48, 5388-5390.
4. (a) Ni, C. L.; Anson, F. C. Inorg. Chem. 1985, 24, 4754-4756.
5. (b) Shi, C.; Anson, F. C. Inorg. Chem. 1990, 29, 4298-4305.
6. Bettelheim, A.; Chan, R. J. H., Kuwana, T. J. Electroanal. Chem. Interfacial Electrockem. 1979, 99, 391-397
7. Collman, J. P.; Chng, L. L.; Tyvoll, D. A. Inorg. Chem. 1995, 34, 1311-1324
8. Offord, D. A ; Ennis, M. S.; Collman, J. P.; Griffin, J. H. J. Am. Chem. Soc., in submission.
9. Ulman, A. An Introduction to Ultrathin Organic Films from Langmuir Blodgett to Self-Assembly; Academic Press: San Diego, CA, 1991.
10. (a) Chidsey, C. E. D. Science. 1991, 257, 919-922.
11. (b) Redepenning, J.; Tumson, H. M.; Finklea, H. O. Langmuir 1993, 9, 1404-1407
12. Collman, J. P.; Kim, K.; Leidner, C. R. Inorg. Chem. 1987, 26, 1152-1157.
13. Collman, J. P.; Ennis, M. S. Unpublished results. See Supporting Information for details.
14. Collman, J. P.; Ennis, M. S. Unpublished results. See Supporting Information for details
15. Gold (111) surfaces were prepared by electron-beam vapor deposition of either 10 nm of titanium followed by 100 nm of gold on polished, cleaned silicon (100) wafers (Pure-Sil) or 1 nm of titanium followed by 10 nm of gold on cleaned, plain glass slides (for UV-vis).
16. Lee, T. R.; Carey, R. I.; Biebuyck, H. A.; Whitesides, G. M. Langmuir 1994, 10, 741-749.
17. 2) thickness averaged 25 A using a refractive index of 1.50. The same surface characterization techniques that were used on the SAM without diporphyrin were used on these surfaces. These data and comparisons with monomeric porphyrin deposition results strongly imply that the diruthenium cofacial diporphyrins on the surface are fairly represented by Figure 2.
18. The measured Soret shift is at our detection limit; the Q-bands were not seen in the UV-vis spectra of the diporphyrin attached SAMs.
19. 2. Collman, J. P.; Ennis, M. S. Unpublished Results.
20. Chidsey, C. E. D.; Bertozzi, C. R.; Putvinski, T. M.; Mujsce, A. M. J. Am. Chem. Soc. 1990, 112, 4301-4306.
21. 2) is described in: Collman, J. P.; Ennis, M. S.; Offord, D. A: Griffin, J. H. J. Am. Chem. Soc., manuscript in preparation.