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Ohio-24 June 2010

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  Vibrational Spectroscopy and   Dynamics of HN   3 Cassidy Houchins   1   , Dan Weidinger    1   , Doug Brown   2   and Jeff Owrutsky   1 1   Chemistry Division, Naval Research Laboratory 2   Department of Chemistry, US Naval Academy This work supported by the Office of Naval Research through the Naval Research Laboratory  Outline ã Introduction  – Background and N 3-  – Motivate acid studies ã Bulk Solvents  – Baseline for more complex systems ã Reverse Micelles  – One example of complex environment ã Conclusions  Introduction ã Vibrational Energy Relaxation  – Depends on environment/phase  – solute/solvent interactions ã simple (gas) ã condensed (liquid) ã complex systems (confined, interfaces) ã Small anions as benchmark probes  – Solvation in bulk (e.g. Li et al) ã VER correlates with frequency ã VER correlates with H-bonding  – Complex environments (e.g. Dahl et al) ã Confined heterogeneous ã Ionic liquids ã HN 3 (Houchins et al)  – Do trends extend?  – New molecular probe? Ohta, K.; Tominaga, K. Chem. Phys. Lett.  2006 , 429  , 136.Li, M.; Owrutsky, J.; Sarisky, M.; Culver, J. P.; Yodh, A.; Hochstrasser, R. M. J. Chem. Phys.  1993 , 98  , 5499.Dahl, K.; Sando, G. M.; Fox, D. M.; Sutto, T. E.; Owrutsky, J. C. J. Chem. Phys.  2005 , 123  , 084504.Houchins, C.; Weidinger, D.W.; Owrutsky, J.C. J. Phys. Chem. B. 2010 (accepted for publication)  FTIR of HN   3   in CH   2   Cl   2   and Toluene v 1  v 2  v 3  v 4  v 5  v 6 Gas * 3336 2140 1264 1151 534 607CH 2 Cl 2  3279.8 2136.2 -- 1158.2 -- --Toluene 3248.3 2130.7 1267.4 1157.8 -- -- *Moore, C. B.; Rosengren, K. J. Chem. Phys.  1966 , 44  , 4108.*Dows, D. A.; Pimentel, G. C. J. Chem. Phys.  1955 , 23  , 1258.   Frequency (cm -1 ) 100015002000250030003500 Absorbance(arb.units) TolueneCH 2 Cl 2  2  (N=N str)  1  (NH str)  3 (NH bend)  4  (N-N str)
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