Sample Application In Quantitative TLC-Ana lysis
j ^ l Fyî^^TT^^^^i In the past, sample application has taken up about one- third of the time needed for the entire analysis. It has also been the step in the procedure most depen dent on the skill and reliability of the laboratory personnel. Automation of sample dispen sing makes TLC particularly attractive for routine analysis. The CAMAG Automatic TLC Sampler I is microprocessor operated, freely programmable and has a volume range from 100 nanolitres to 20 microlitres. Ask for
detailed
information.
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of optical detection and, of course, the ingenuity of the spectroscopist, the number of reactions that feasibly can be studied and the amount of detailed mechanistic information that can be provided by means of picosecond spectroscopy surely will continue to increase. References (1) Rentzepis, P. M. Chem. Phys. Lett. 1968,2,117. (2) Hilinski, E. F.; Rentzepis, P. M. Na ture 1983, 302, 481. (3) Hilinski, E. F.; Rentzepis, P. M. Ace. Chem. Res. in press. (4) Topp, M. R.; Rentzepis, P. M.; Jones, R. P. J. Appl. Phys. 1971,42, 3451. (5) Bondybey, V. E.; Milton, S. V.; En glish, J. H.; Rentzepis, P. M. Chem. Phys. Lett., 1983,97, 130. (6) Merian, E. Chimia 1959,73,181. (7) Josien, M. L.; Fuson, N.; Lebas, J. M.; Gregory, T. M. J. Chem. Phys. 1953,21, 331. (8) Schmand, H.L.K.; Kratzin, H.; Boldt, P. Liebigs Ann. Chem. 1976,1560. (9) Schiau, W. I.; Duesler, Ε. Ν.; Paul, I. C ; Curtin, D. Y.; Blann, W. G.; Fyfe, C. A. J. Am. Chem. Soc. 1980,102, 4546. (10) Bratan, S.; Strohbusch, F. J. Mol. Struct. 1980,67,409. (11) Anoshin, A. N.; Shigorin, D. N.; Gorelik, M. V. Russ. J. Phys. Chem. 1979,53, 431. (12) Anoshin, A. N.; Gastilovich, Ε. Α.; Shigorin, D. N. Russ. J. Phys. Chem. 1980,54,1409. (13) Barbara, P. F.; Rentzepis, P. M.; Brus, L. E. J. Chem. Phys. 1980, 41, 269. (14) Allison, J. B.; Becker, R. S. J. Chem. Phys. 1960,32,1410. (15) Becker, R. S.; Kasha, M. J. Am. Chem. Soc. 1955, 77, 3669. (16) Eastwood, D.; Gouterman, M. J. Mol. Spectrosc. 1969,30,437. (17) Hopf, F. R.; Whitten, D. G. In "Por phyrins and Metalloporphyrins"; Κ. Μ. Smith, Ed.; Elsevier: New York, 1972; p. 667. (18) Magde, D.; Windsor, M. W.; Holten, D.; Gouterman, M. Chem. Phys. Lett. 1974 29 183 (19) Tsvirko, M. P.; Stelmakh, G. F.; Pyatosin, V. E. Chem. Phys. Lett. 1980, 73, 80. (20) Ake, R. L.; Gouterman, M. Theor. Chim. Acta 1969,15,20. (21) Gouterman, M.; Schwarz, F. P.; Smith, P. D.; Dolphin, D. J. Chem. Phys. 1973 59 679 (22) Huppert, D.; Straub, K. D.; Rentze pis, P. M. Proc. Natl. Acad. Sci. U.S.A. 1977, 74,4139. (23) Kobayashi, T.; Huppert, D.; Straub, K. D.; Rentzepis, P. M. J. Chem. Phys. 1979, 70,1720. (24) Reynolds, A. H.; Straub, K. D.; Rent zepis, P. M. Biophys. J. 1982,40, 27. (25) Theorell, H.; Akesson, A. J. Am. Chem. Soc. 1941,63,1812. (26) Boeri, E.; Ehrenberg, Α.; Paul, K. G.; Theorell, H. Biochem. Biophys. Acta 1953 12 273 (27) Reagor, β! T.; Kelley, D. F.; Huchital, D. H.; Rentzepis, P. M. J. Am. Chem. Soc. 1982,704,7400. (28) Huchital, D. H.; Lepore, J. lnorg. Chem. 1978,77, 1134. (29) Rosenheim, L.; Spencer, D.; Haim, A. lnorg. Chem. 1974, 73, 1571. (30) Huchital, D. H.; Wilkins, R. G. lnorg. Chem. 1967,6,1022. (31) Blair, J. C., Jr.; Emeteus, H. J.; Nyholm, R.; Trotman-Dickenson, A. F., Eds.; "Comprehensive Inorganic Chem-
1140 A · ANALYTICAL CHEMISTRY, VOL. 55, NO. 11, SEPTEMBER 1983
istry"; Pergamon Press: New York, 1973; Vol. 3, pp. 979, 1053,1087, 1104. (32) Creutz, C.; Kroger, P.; Matsubara, T.; Netzel, T. L.; Sutin, N. L. J. Am. Chem. Soc. 1979,707,5442. (33) Fisher, H.; Tom, G. M.; Taube, H. J. Am. Chem. Soc. 1976,98, 5512. (34) Hilinski, E. F.; Milton, S. V.; Rentze pis, P. M. J. Am. Chem. Soc, in press. (35) Gschwind, R.; Haselbach, E. Helv. Chim. Acta 1979,97,941. (36) Delcourt, M. 0.; Rossi, M. J., personal communication. (37) Ottolenghi, M. Ace. Chem. Res. 1973, 6, 153. (38) Rehm, D.; Weller, A. Ber. Bunsenges. Phys. Chem. 1969, 73,834. (39) Rehm, D.; Weller, A. Isr. J. Chem. 1970,8, 259 and references cited therein. (40) Leonhardt, H.; Weller, A. Ber. Bun senges. Phys. Chem. 1963,67, 791. (41) Knibbe, H.; Rehm, D.; Weller, A. Ber. Bunsenges. Phys. Chem. 1968, 72, 257. (42) Nagakura, S. Excited States 1975,2, 321. (43) Simons, J. D.; Peters, K. S. J. Am. Chem. Soc. 1981, 703, 6403 and refer ences cited therein. (44) Simons, J. D.; Peters, K. S. J. Am. Chem. Soc. 1982, 704,6542. (45) Kelley, D. F.; Milton, S. V.; Huppert, D.; Rentzepis, P. M. J. Phys. Chem. 1983,87, 1842. (46) Huppert, D.; Rand, S. D.; Reynolds, A. H.; Rentzepis, P. M.J. Chem. Phys. 1982, 77, 1214.
Edwin F. Hilinski received his BS in chemistry from Wilkes College. With Jerome Berson as his research advi sor, he obtained his PhD from Yale University in 1982. Currently he is a postdoctoral member of the technical staff at Bell Laboratories.
Peter M. Rentzepis is head of the Physical and Inorganic Chemistry Research Department at Bell Labora tories, Murray Hill, N.J. He currently is involved in picosecond spectrosco py research using lasers.
