<br/>Chemical surface reactions and transformations at solid/liquid interfaces depend strongly on the local electrostatic interfacial environment as well as on nano- and microscale structures, structural heterogeneities, and confinement. Characterizing these processes is a challenge and fundamental interface characterization is traditionally done on well-defined planar model systems. How far such studies still are from providing molecular level information from realistic systems is a relevant question both from a fundamental and technological perspective. Here we present a wide-field second harmonic (SH) microscopy approach to image in 3D and on millisecond time scales the interfacial structure and dynamics of the curved water/glass micro-capillary interface. We provide real time information about the local chemical environment and derive electrostatic surface potential maps as well as real-time spatially resolved surface acid dissociation constant pKa,s values for the silica deprotonation reaction. <br/>

Second harmonic imaging of real-time spatially resolved chemical reaction constants

2019 Fall National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.