Two photon excitation spectrum of a twisted quadruple bond metal-metal complex [7]

Journal of the American Chemical Society

Volumn 121, Issue 4, 1999, Pages 868-869

  Engebretson, Daniel S ^a,b   Graj, Evan M ^c   Leroi, George E ^a,b   Nocera, Daniel G ^c  

^a MASSACHUSETTS INSTITUTE OF TECHNOLOGY   (United States)

^b MICHIGAN STATE UNIVERSITY   (United States)

^c NONE

Author keywords

[No Author keywords available]

Indexed keywords

ABSORPTION SPECTROPHOTOMETRY; CHEMICAL BINDING; COMPLEX FORMATION; INFRARED SPECTROMETRY; LETTER; LIGHT EXPOSURE; MATHEMATICAL ANALYSIS; METAL BINDING;

EID: 0033518573     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja983295d     Document Type: Letter

References (25)

1. Heitler, W.; London, F. Z. Phys. 1927, 44, 455-72.
2. Coulson, C. A.; Fischer, I. Philos. Mag. 1949, 40, 386-93.
3. Merer, A. J.; Mulliken, R. S. Chem. Rev. 1969, 69, 639-56.
4. 1π*π* excited state of twisted olefins have recently been reported; see Piotrowiak, P.; Strati, G.; Smirnov, S. N.; Warman, J. M.; Schuddeboom, W. J. Am. Chem. Soc. 1996, 118, 8981-2.
5. Cotton F. A.; Walton, R. A. Multiple Bonds between Metal Atoms, 2nd ed.; Clarendon Press: Oxford, 1993.
6. Trogler, W. C.; Gray, H. B. Acc. Chem. Res. 1978, 11, 232-9.
7. Hopkins, M. D.; Zietlow, T. C.; Miskowski, V. M.; Gray, H. B. J. Am. Chem. Soc. 1985, 107, 510-2.
8. (a) Cotton, F. A.; Eglin, J. L.; Hong, B.; James, C. A. J. Am. Chem. Soc. 1992, 114, 4915-7.
9. (b) Cotton, F. A.; Eglin, J. L.; Hong, B.; James, C. A. Inorg. Chem. 1993, 32, 2104-6.
10. Engebretson, D. S.; Zaleski, J. M.; Leroi, G. E.; Nocera, D. G. Science 1994, 265, 759-62.
11. Agaskar, P. A.; Cotton, F. A.; Fraser, I. F.; Manojlovic-Muir, L.; Muir, K. A.; Peacock, R. D. Inorg. Chem. 1986, 25, 2511-9.
12. Emission spectra were measured on a high-resolution instrument modified with a liquid Ni-cooled Ge detector from Applied Detector (403L spectrometer). The signal from the detector was phase-matched to a chopped excitation beam with a PARC EG&G lock-in amplifier. The lock-in output was collected as the observed excitation intensity; instrument control and digital data collection and manipulation were performed through a Labview Graphical User Interface.
13. The requirement of intense, tunable near-infrared photons was satisfied with the output of an OPO (Type I XPO operated in the idler mode) pumped by the third harmonic (3.5 ns pulse width, 100 Hz, and 170 mJ/pulse) of a Coherent Infinity 40-100 Nd: YAG laser (Coherent Laser Group, Santa Clara, CA). The details of the experimental apparatus, which has been significantly altered from a previous instrument so that the near-infrared spectral region could be accessed, will be reported in a future publication.
14. Steinfeld, J. I. Molecules and Radiation, 2nd ed.; MIT Press: Cambridge, 1993; Ch. 14.
15. (a) Monson, P. R.; McClain, W. M. J. Chem. Phvs. 1970, 53, 29-37.
16. (b) McClain, W. M. J. Chem. Phys. 1971, 55, 2789-96.
17. Nasciemento, M. A. Chem. Phys. 1983, 74, 51-66.
18. -1 difference between the two energy gap measurements.
19. Hay, P. J. J. Am. Chem. Soc. 1982, 104, 7007-17.
20. Hopkins, M. D.; Gray, H. B.; Miskowski, V. M. Polyhedron 1987, 6, 705-14.
21. Cotton, F. A.; Feng, X. J. J. Am. Chem. Soc. 1993, 115, 1074-8.
22. Smith, D. C.; Goddard, W. A., III. J. Am. Chem. Soc. 1987, 109, 5580-3.
23. (a) Mulliken, R. S. Phys. Rev. 1936, 50, 1017-27.
24. (b) Mulliken, R. S. J. Phys. Chem. 1937, 41, 5-45.
25. Mulliken, R. S. Phys. Rev. 1932, 41, 751-8.