Christensen, Ronald - Bowdoin College - Department of Chemistry

个人简介

A.B. 1967 Oberlin College, Oberlin, Ohio. A.M. 1969 Harvard University, Cambridge, Massachusetts. Ph.D. 1972 Harvard University, Cambridge, Massachusetts.

研究领域

Physiology and molecular biology of microbes in extreme environments; novel mechanisms of regulation in biochemical pathways

近期论文

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“Energetics and Dynamics of the Low-Lying Electronic States of Constrained Polyenes: Implications for Infinite Polyenes,” R.L. Christensen, M.M. Enriquez, N.L. Wagner, A.Y. Peacock-Villada,* C. Scriban, R.R. Schrock, Tomáš Polívka, H.A. Frank, and R.R. Birge, Journal of Physical Chemistry A, 117, 1449-1465 (2013). “A Case of Reform: The Undergraduate Research Collaboratives,” E. Horsch, M. St. John, and R. L. Christensen, Journal of College Science Teaching 41, 14-19 (2012). "Ultrafast Excited State Relaxation in Long-chain Polyenes," M. R. Antognazza, L. Lüer, D. Polli, R. L. Christensen, R. R. Schrock, G. Lanzani, and G. Cerullo, Chemical Physics 373, 115-121 (2010). “Synthesis and Optical Spectroscopy of Oligo (1,6-Heptadiynes) with a Single Basic Structure Prepared Through Adamantylimido-based Molybdenum Wittig and Metathesis Chemistry,” C. Scriban, B. S. Amagai,* E. A. Stemmler, R. L. Christensen, and R. R. Schrock, Journal of the American Chemical Society, 131, 13441-13452 (2009). "Excited Electronic States and the Photochemistry and Photophysics of Carotenoids," H.A. Frank and R.L. Christensen in Carotenoids, Vol. 4: Natural Functions, G. Britton, S. Liaaen-Jensen, and H. Pfander (eds.), Springer, pp.167-188 (2008). "Energies of Low-Lying Excited States of Linear Polyenes," R.L. Christensen, M.G.I. Galinato, E.F. Chu,* J.N. Howard,* R.D. Broene, and H.A. Frank, J. Phys. Chem. A 2008, 112, 12629-12636 (2008). "Symmetry Control of Radiative Decay in Linear Polyenes: Low Barriers for Isomerization in the S1 State of Hexadecaheptaene," R.L. Christensen, M.G.I. Galinato, E.F. Chu,* R. Fujii, H. Hashimoto, and H. A. Frank, J. Am. Chem. Soc., 129 (6), 1769 -1775 (2007). "Synthesis of Oligoenes that Contain up to 15 Double Bonds from 1,6-Heptadiynes," C. Czekelius, J. Hafer, Z. J. Tonzetich, R. R. Schrock, R.L. Christensen, and P. Müller, J. Am. Chem. Soc., 128 (51), 16664 -16675 (2006). "Femtosecond Time-Resolved Absorption Spectroscopy of Astaxanthin in Solution and in α-Crustacyanin," R.P. Ilagan, R.L. Christensen, T.W. Clapp,* G.N. Gibson, T. Pascher, T. Polivka, and H.A. Frank, Journal of Physical Chemistry A 109, 3120-3127 (2005). “Optical Spectroscopy of Long Polyenes,” R.L. Christensen, A Faksh*, J. Meyers*, I.F.W. Samuel, P. Wood, K. Hultzsch, and R.R. Schrock, Journal of Physical Chemistry A 108, 8229-8236 (2004). “Linear Polyenes: Models for the Spectroscopy and Photophysics of Carotenoids,” R. L. Christensen, E. A. Barney*, R. D. Broene, M. G. I. Galinato*, and H. A. Frank, Archives of Biochemistry and Biophysics 430, 30-36 (2004). "Spectroscopic and Photochemical Properties of Open-Chained Carotenoids," H.A. Frank, J.S. Josue*, J.A. Bautista*, I. van der Hoef, F.J. Jansen, J. Lugtenburg, G. Wiederrecht, and R.L. Christensen, Journal of Physical Chemistry B 106, 2083-2092 (2002). "Conformational Disorder in Long Polyenes," P. Wood*, I.D.W. Samuel, R. Schrock, and R.L. Christensen, Journal of Chemical Physics 115, 10955-10963 (2001). "The Electronic States of Carotenoids," R.L. Christensen in The Photochemistry of Carotenoids, H.A. Frank, A.J. Young, G. Britton, and R.J. Cogdell (eds.), Kluwer Academic Publishers, pp.137-160 (1999). "The Rotationally Resolved Electronic Spectra of all-trans-Octatetraene and its Derivatives," J.F. Pfanstiel, D.W. Pratt, B.A. Tounge*, and R.L. Christensen, Journal of Physical Chemistry A 103, 2337-2347 (1999). "S1 and S2 States of Apo- and Diapocarotenes," R.L. Christensen, M. Goyette*, L. Gallagher*, J. Duncan*, B. DeCoster, J. Lugtenburg, F.J. Jansen, and I. van der Hoef, Journal of Physical Chemistry A 103, 2399-2407 (1999). "Time-Resolved Luminescence Anisotropy Studies of the Relaxation Behavior of Polymers. 1. Intramolecular Segmental Relaxation of Poly(methyl methacrylate) and Poly(methacrylate) in Dilute Solutions in Dichloromethane," I. Souter, L. Swanson, R.L. Christensen, R.C. Drake*, and D. Phillips, Macromolecules 29, 4931-4936 (1996). "One- and Two-photon Fluorescence Excitation Spectra of the 21Ag States of Linear Tetraenes in Free Jet Expansions," H. Petek, A.J. Bell, Y.S. Choi, K. Yoshihara, B.A. Tounge*, and R.L. Christensen, Journal of Chemical Physics 102, 4726 (1995). "Singlet Energy Transfer from Carotenoids to Bacteriochlorophylls," H.A. Frank and R.L. Christensen, in Anoxygenic Photosynthetic Bacteria (R.E. Blankenship, M.T. Madigan, and C.E. Bauer, eds.), Kluwer Academic Publishers, pp.373-384 (1995). "A New Homogeneous Assay System for Specific Nucleic Acid Sequences: poly-dA and poly-A Detection," C.B. Bagwell, M E. Munson, R.L. Christensen, and E.J. Lovett, Nucleic Acids Research 22, 2424 (1994). "Evidence for quantization of the transition state for cis-trans isomerization," Y.S. Choi, T.-S. Kim, H. Petek, K. Yoshihara, and R.L. Christensen, Journal of Chemical Physics 100, 9269 (1994). "The 21Ag State of trans,trans-1,3,5,7-octatetraene in Free Jet Expansions," H. Petek, A.J. Bell, Y.S. Choi, K. Yoshihara, B. Tounge*, and R.L. Christensen, Journal of Chemical Physics 98, 3777 (1993). "Carotenoid-to-Bacteriochlorophyll Singlet Energy Transfer in Carotenoid-Incorporated B850 Light-Harvesting Complexes of Rhodobacter Sphaeroides R26.1," H.A. Frank, R. Farhoosh, M. Aldema, B. DeCoster, R.L. Christensen, R. Gebhard, and J. Lugtenburg, Photochemistry and Photobiology 57, 49 (1993). "Low Lying Electronic States of Carotenoids," B. DeCoster, R.L. Christensen, R. Gebhard, J. Lugtenburg, R. Farhoosh, and H. Frank, Biochimica et Biophysica Acta 1102, 107 (1992). "Vibrational Spectroscopy and Picosecond Dynamics of Gaseous Trienes and Tetraenes in S1 and S2 Electronic States," H. Petek, A.J. Bell, R.L. Christensen, and K. Yoshihara, SPIE 1638 (Optical Methods for Time- and State-Resolved Chemistry), 345 (1992).