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Three dimensional vibrational spectroscopy of water |
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Dana D. Dlott (Curriculum Vitae) Dana D. Dlott (personal home page) David M. Dlott (personal home page) |
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Water is arguably the most important and
complicated liquid. Recently quite a
few groups have used time-resolved vibrational spectroscopy to look at
water. There are two main areas of
interest. The first is the nature of
hydrogen bonding andthe picosecond time scale making and breaking of hydrogen
bonds. The second is the nature of
vibrational energy flow. Most of the experiments done so far for
technical reasons look at the HOD impurity in D2O. The Dlott group has been a pioneer in
studying water itself as well as these isotopomers. In particular we were the first to map out
the vibrational relaxation pathways of water.
References “Vibrational energy relaxation in water and deuterated water”, John C. Deāk, Stuart T. Rhea, Lawrence K. Iwaki, and Dana D. Dlott, J. Phys. Chem. A 104, pp. 4866-4875 (2000). “Vibrational energy redistribution in polyatomic liquids: 3D infrared-Raman spectroscopy”, Dana D. Dlott, Chem. Phys. (Special issue on multidimensional spectroscopies) 266, pp. 149-166 (2001). “Vibrational relaxation and spectral evolution following ultrafast OH stretch excitation of water”, Andrei Pakoulev, Zhaohui Wang and Dana D. Dlott, Chem. Phys. Lett. 371, pp. 594-600 (2003). “Vibrational substructure in the OH stretching band of
water”, Zhaohui Wang, Andrei Pakoulev, Yoonsoo Pang and Dana D. Dlott,
Chem. Phys. Lett. 378, pp. 281-288
(2003). “Vibrational energy relaxation pathways of water”, Andrei
Pakoulev, Zhaohui Wang, Yoonsoo Pang and Dana D. Dlott, Chem. Phys. Lett.
380, pp. 404-410 (2003). “Three-dimensional spectroscopy of vibrational energy
relaxation in liquids”, Zhaohui Wang, Andrei Pakoulev, Yoonsoo Pang and
Dana D. Dlott, in “Femtochemistry and Femtobiology: Ultrafast Events in
Molecular Science”, M. M. Martin and J. T. Hynes, eds. ( “Reply to: Comment on: Vibrational relaxation and spectral diffusion following ultrafast OH stretch excitation of water, by H. J. Bakker, A. J. Lock, D. Madsen, Andrei Pakoulev, Zhaohui Wang, Yoonsoo Pang, Dana D. Dlott, Chem. Phys. Lett. 385, pp. 332-335 (2004). “The vibrational Stokes shift of water (HOD in D2O)”, Zhaohui Wang, Yoonsoo Pang and Dana D. Dlott, J. Chem. Phys. 120, pp. 8345-8348 (2004). “Vibrational energy dynamics of water studied with ultrafast Stokes and Anti-Stokes Raman spectroscopy”, Zhaohui Wang, Yoonsoo Pang and Dana D. Dlott, Chem. Phys. Lett. 394, pp. 40-45 (2004).
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Block diagram of apparatus for 3D vibrational spectroscopy in Dlott labs
Anti-Stokes Raman of water pumped at 3115 and 3450 cm-1 . The vibrational relaxation mechanism of bend-to-stretch generation is seen only with red-edge pumping
Time dependence of stretch and bend of
water pumped at 3115 cm-1
Simultaneous Stokes and anti-Stokes
spectra of water pumped at 3450 cm-1 |
