Joseph I. Cline
Professor
Physical Chemistry; Chemical Physics
B.S. (1983), University of Virginia; Ph.D. (1988), California Institute of Technology (Kenneth C. Janda); Postdoctoral (1988-1990), JILA, University of Colorado (Stephen R. Leone)
E-mail: cline![[at]](../images/at.png)
unr.edu
Phone: 775-784-4376
FAX: 775-784-6804
Office: CB 230
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Joseph I. Cline
Research Interests
Research interests center around the experimental investigation of inelastic molecular collisions, vibrational predissociation in weakly-bound complexes, photodissociation of molecules, and gas-phase chemical kinetics. Molecular beam techniques and time-of-flight mass spectrometry detection are used in conjunction with laser spectroscopic probes to study these chemical processes with electronic, vibrational, rotational, and translational quantum-state resolution. Experimental measurements are interpreted using theoretical models for these dynamic processes. Construction of realistic potential energy surfaces from dynamical measurements on complex systems is one major goal of our research.
Principal areas of current research include: (1) Photofragmentation dynamics of large molecules. The correlation of the scalar and vector properties of translational and rotational angular momentum is being studied in the photofragmentation dynamics of relatively large molecules where structure, conformation, and stereochemistry can play important roles in directing nuclear motions during the course of the dissociation reaction. A particular goal is the detection of preferential planes and senses of photofragment rotation that can result from stereospecificity in the reaction mechanism. We are presently examining the dynamics of alkylnitroso and azo compounds in detail with a special interest in stereospecificity in the dynamics of small chiral molecules. (2) Molecular stereodynamics of rotationally inelastic and reactive collisions. Recently we have measured the propensity for “frisbee” and “propeller” trajectories produced in rotationally inelastic collisions of NO and Ar.
Selected Publications
“Ion imaging studies of product rotational alignment in collisions of NO (X2Π1/2, j=0.5) with Ar”, E. A. Wade, K. T. Lorenz, D. W. Chandler, J. W. Barr, G. L. Barnes, and J. I. Cline, Chem. Phys. 301, 261-272 (2004).
“Ion Imaging Applied to the Study of Chemical Dynamics“, David W. Chandler and Joseph I. Cline, in X. Yang and K. Liu, eds. Modern Trends In Chemical Reaction Dynamics, Part I: Experiment and Theory Advanced Series in Physical Chemistry Vol. 14 (World Scientific: 2004), pgs. 61-104.
“Direct measurement of the binding energy of the NO dimer”, E.A. Wade, J.I. Cline, K.T. Lorenz, C. Hayden, and D.W. Chandler J. Chem. Phys., 116, 4755-4757 (2002).
“Measurement of bipolar moments for photofragment angular correlations in ion imaging experiments”, V.K. Nestorov, R.D. Hinchliffe, R. Uberna, J.I. Cline, K.T. Lorenz, and D.W. Chandler, J. Chem. Phys., 115, 7881-7891, (2001).
“Ion imaging measurement of collision-induced rotational alignment in Ar-NO scattering”, J.I. Cline, K.T. Lorenz, E.A. Wade, J.W. Barr, and D.W. Chandler, J. Chem. Phys. 115, 6277-6280 (2001).
“Direct measurement of the preferred sense of NO rotation after collision with argon”, K.T. Lorenz, D.W. Chandler, J.W. Barr, W. Chen, G.L. Barnes, and J.I. Cline, Science 293, 2063-2066 (2001).
For commentary on this work, also see:
“Close encounters”, F.F. Crim, Science 293, 2014-2015 (2001).
“News of the Week: Which way do they spin?”, E. Wilson, Chemical and Engineering News 79(38), 9 (17 Sep 2001).
“Search and Discovery: Experiment and Theory Combine to Probe the Quantum Chemistry of Molecular Beams”, C. Day, Physics Today 55(1), 13-15 (Jan 2002).
“Determination of μ-v-j vector correlations in photodissociation experiments using 2+n resonance-enhanced multiphoton ionization with time-of-flight mass spectrometry detection”, P.J. Pisano and J.I. Cline, J. Chem. Phys. 112, 6190 (2000).
“Detection of ‘ended’ NO recoil in the 355 nm NO2 photodissociation mechanism”, V.K. Nestorov and J.I. Cline, J. Chem. Phys. 111, 5287-5290 (1999).
“Scalar and angular correlations in CF3NO photodissociation: statistical and nonstatistical channels”, J.S. Spasov and J.I. Cline, J. Chem. Phys. 110, 9568-9577 (1999).
“Chiral dissociation dynamics of molecular ratchets: preferential senses of rotation in microscopic systems”, K. Fukui, J.H. Frederick, and J.I. Cline, Phys. Rev. A 58, 929 (1998).
“Canonical sampling of classical phase space: Application to molecular vibration-rotation dynamics”, K. Fukui, J.I. Cline, and J.H. Frederick, J. Chem. Phys. 107, 4551 (1997).
“Classical trajectory study of product state vector correlations: a model for the photodissociation of CF3NO”, K. Fukui, J.H. Frederick, and J.I. Cline, J. Chem. Phys. 107, 4564 (1997).
“NO μ-v-j correlations in the photofragmentation of 2-chloro-2-nitrosopropane”, R. Uberna, R.D. Hinchliffe, and J.I. Cline, J. Chem. Phys. 105, 9847 (1996).
“Photofragment μ-v-j correlations measured by 1+n′ resonance-enhanced multiphoton ionization: selective probing of bipolar moments and detection of chiral dynamics”, R.J. Uberna, R.D. Hinchliffe, and J.I. Cline, J. Chem. Phys. 103, 7934 (1995).
“Classical phase space theory for product state distributions with application to the v-j vector correlation”, S.J. Klippenstein and J. I. Cline, J. Chem. Phys. 103, 5451 (1995).