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Award ID contains: 1836498

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  1. ; ; ; (, The Journal of Physical Chemistry Letters)
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  2. ; ; ; ; ; ; ; ; ; (, The Journal of Physical Chemistry B)
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  3. ; ; ; ; ; ; (, The Journal of Physical Chemistry A)
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  4. ; ; ; ; ; ; ; ; ; (, The Journal of Physical Chemistry B)
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  5. ; ; ; ; ; ; ; (, The Journal of Physical Chemistry A)
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  6. ; ; ; ; (, Optics Express)
    A pulse-shaper-based method for spectral phase measurement and compression with milliradian precision is proposed and tested experimentally. Measurements of chirp and third-order dispersion are performed and compared to theoretical predictions. The single-digit milliradian accuracy is benchmarked by a group velocity dispersion measurement of fused silica. 
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  7. ; (, SPIE BiOS, Multiphoton Microscopy in the Biomedical Sciences XXI)
    Periasamy, Ammasi; So, Peter T.; König, Karsten (Ed.)
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  8. ; (, Chemical Physics)
    null (Ed.)
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  9. ; ; ; ; ; ; ; ; ; ; et al (, The Journal of Chemical Physics)
  10. ; ; ; ; ; ; ; ; ; (, Physical Chemistry Chemical Physics)
    null (Ed.)
    The significance of solvent structural factors in the excited-state proton transfer (ESPT) reactions of Schiff bases with alcohols is reported here. We use the super photobase FR0 -SB and a series of primary, secondary, and tertiary alcohol solvents to illustrate the steric issues associated with solvent to photobase proton transfer. Steady-state and time-resolved fluorescence data show that ESPT occurs readily for primary alcohols, with a probability proportional to the relative –OH concentration. For secondary alcohols, ESPT is greatly diminished, consistent with the barrier heights obtained using quantum chemistry calculations. ESPT is not observed in the tertiary alcohol. We explain ESPT using a model involving an intermediate hydrogen-bonded complex where the proton is “shared” by the Schiff base and the alcohol. The formation of this complex depends on the ability of the alcohol solvent to achieve spatial proximity to and alignment with the FR0 -SB* imine lone pair stabilized by the solvent environment. 
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