We report the first measurements of the activation barrier for ground state trans-cis isomerization of secondary amides. We measured activation barriers of Ea ) 13.8 ( 0.8 kcal/mol for aqueous solutions of N-methylacetamide (NMA) and Ea ) 11.0 ( 0.7 kcal/mol for glycylglycine (Gly-Gly). These activation barriers were determined from the temperature dependence of the ground state isomerization r...

Wetlands export chromophoric dissolved organic matter (CDOM) to estuaries, where CDOM is removed and transformed through biotic abiotic process, subsequently impacting nutrient cycling, light availability, ecosystem metabolism, phytoplankton activity. We examined the bioavailability photoreactivity of exported from four Chesapeake Bay tidal marshes across three seasons along an estuarine salini...

Photoinduced electron transfer in donor-acceptor systems composed of quantum dots (QDs) and electron donors or acceptors is a subject of considerable recent research interest due to the potential applications of such systems in both solar energy harvesting and degradation of organic pollutants. Herein, we employed single-molecule imaging and spectroscopy techniques for the detection of photoche...

A new perspective on how to manipulate molecules by means of very strong laser pulses is emerging with insights from the so-called light-induced potentials, which are the adiabatic potential energy surfaces of molecules severely distorted by the effect of the strong field. Different effects appear depending on how the laser frequency is tuned, to a certain electronic transition, creating light-...

We report the synthesis of altitudinal molecular motors that contain functional groups in their rotor part. In an approach to achieve dynamic control over the properties of solid surfaces, a hydrophobic perfluorobutyl chain and a relatively hydrophilic cyano group were introduced to the rotor part of the motors. Molecular motors were attached to quartz surfaces by using interfacial 1,3-dipolar ...