简介:he nature of water's hydrogen-bonding network is a vital in
fluence on the chemistry that occurs at interfaces, but a
complete understanding of interfacial water has proven elusive.
Even-order nonlinear optical sp简介:he nature of water's hydrogen-bonding network is a vital in
fluence on the chemistry that occurs at interfaces, but a
complete understanding of interfacial water has proven elusive.
Even-order nonlinear optical spectroscopies, such as vibrational sum
frequency generation (VSFG) spectroscopy and heterodyne detected
phase-sensitive sum frequency generation (PS-SFG) spectroscopy,
are inherently surface specific. With the advent of advances in these
spectroscopic techniques, researchers can now explore many longstanding
questions about the dynamics and structures present at the
vaporwater and watersolid interfaces. Of special interest to the
atmospheric chemistry community is the accommodation of ions and
solutes by water's hydrogen-bonding network. A better understanding
of how ions and solutes behave in hydrogen-bonded water has afforded
a fresh perspective of aqueous aerosols, because the interactions
involved therein drive phenomena such as the hydrolysis of atmospheric
chemical species. In this Account, we present work from our
laboratory focusing on applying VSFG and the recently developed PSSFG
techniques to probe the perturbation ofwater's hydrogen-bonding
network at the vaporwater interface by a variety of ions and solutes.
We also present very recent results from our laboratory on the direct
observation of the adsorption of ions at the waterCaF2 interface.详细>