TODAY! Join us for the Chemistry Seminar Series
Title: Scaffold-Controlled Energy Transport in Molecular Assemblies
Speaker: Dr. Art Bragg, Associate Professor, Department of Chemistry, Johns Hopkins University
Date: Thursday, April 10
Time: 11:00 AM
Location: SC 4230
Abstract:
Molecular assemblies are an attractive materials platform for solar-light-harvesting applications (e.g. organic solar cells and artificial photosynthesis) but require the precise spatial organization of constituent pigments to facilitate efficient energy flow. In this talk I present our recent studies of photoinduced energy transport in scaffolded molecular assemblies and templated molecular films. In peptide-scaffolded assemblies, interactions waged through ion pairing and hydrogen bonding are used to drive supramolecular assembly of pi-conjugated organic chromophores. We present work demonstrating tunable energy transport rates by using peptide interactions to manipulate the interactions between chromophores along molecular stacks. In a similar vein, structured surfaces present means to template packing within films. We present recent work using surface-templated thin-films to manipulate rates of novel intermolecular energy-transfer processes.
Speaker Bio:
Prof. Bragg grew up in Southeastern Michigan and earned a B.A. in Chemistry and Physics at Albion College. Dr. Bragg earned his Ph.D. in Chemistry at UC Berkeley working with Prof. Daniel Neumark and using ultrafast time-resolved photoelectron spectroscopy to interrogate dynamics of photoexcited molecular clusters. Prof. Bragg was a post-doctoral researcher at UCLA working with Prof. Benjamin Schwartz to elucidate dynamics of solvent-solute interactions that control electron transfer in condensed phases. Prof. Bragg joined the chemistry faculty at Johns Hopkins in 2010. His group uses ultrafast optical spectroscopies to investigate photochemical and photophysical processes in light responsive materials with applications for photochemistry, photoswitching, and light harvesting
Categorised in: General
This post was written by Charles, Amanda G.