Measurement of in situ structure and structural dynamics in biomimetic supramolecular solar fuel catalysts

David M. Tiede, Karen L. Mulfort, Lisa M. Utschig, Amy M. Scott, Oleg G. Poluektov, Lin X. Xiaoyi, Zhang Klaus

Research output: Contribution to journalConference article

Abstract

Photosynthesis serves as a paradigm for the design of molecular systems for solar energy conversion based on modular architectures, hierarchically assembly, and host-guest chemistry linked by non-covalent chemistry. Recent examples include the development of photosystem I-catalyst hybrids and a variety of supramolecular analogues that couple photosensitizers to catalysts for solar hydrogen production. Each differs considerably in efficiency of solar hydrogen production. A central challenge lies in the development of methods for in-situ characterization of biomimetic supramolecular structure that can be correlated to catalysis. Here, we demonstrate opportunities to characterize the structures of these modular supramolecular assemblies using synchrotron X-ray scattering. We have used a combination of wide-angle x-ray scattering of the molecular components and the completed assemblies to resolve interference patterns characteristic of the ground-state assembly. Further, we have developed laser-pump/70 ps X-ray probe pulse techniques for direct detection of atomic reorganization accompanying photochemical charge separation in solution-state supramolecular systems.

Original languageEnglish (US)
JournalACS National Meeting Book of Abstracts
StatePublished - Aug 25 2011
Externally publishedYes
Event241st ACS National Meeting and Exposition - Anaheim, CA, United States
Duration: Mar 27 2011Mar 31 2011

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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