XANES and EXAFS Spectroscopy of Materials and Biological Samples: Expanding the Range of Applications at Beamline 9.3.1

Abstract

This workshop will be held on October 21, Friday 1:30-4:30p at Advanced Light Source, Berkeley, CA. following the general session portion of the ALS Users' Meeting. The scientific scope includes the broad range of applications of XANES, EXAFS, and X-ray emission techniques conducted at Beamline 9.3.1 ranging from chemical biology to atomic physics. Highlighted themes will include:

• S and Cl K-edge spectroscopy of S-nitroso and Ru containing anticancer compounds

• Electronic and geometric structures of Pd, Ti, Nb, Cu catalysts

• X-ray emission studies of ultrafast dissociation of chlorine containing molecules.

The primary goals of this workshop are to summarize the latest scientific achievements at BL9.3.1, update users about the recent improvements to the beamline including horizontal beam position stabilization, and a new X ray emission end station, and discuss new research opportunities and outline short and long-term road-maps for future development of BL9.3.1.

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Friday, October 21

Part 1: Research and science at BL 9.3.1
Moderator: RK Szilagyi

1:30 – 1:45
Robert Szilagyi (Montana State University, Bozeman, MT)
Introduction to electronic and geometric structural studies of biomolecules and homogeneous catalysts by XANES at BL9.3.1

1:45 – 2:00
Heinz Frei (Lawrence Berkeley National Laboratory, Berkeley, CA)
Absorption studies of molecular sieves with Ru and Ti content

2:00 – 2:15
Karen McFarlane Holman (Willamette University, Salem, OR)
XAS studies of Ru anticancer complexes

2:15 – 2:40
Alexis Bell (University of California, Berkeley, CA)
In-Situ, Multielement XANES and EXAFS Studies of Cu-Exchanged Zeolite Catalysts

2:40 – 3:00 Follow on discussion

Part 2: Recent upgrades and developments
Moderator: A. Schlachter

3:00 – 3:15
Fred Schlachter (Lawrence Berkeley National Laboratory, Berkeley, CA)
Beamline status and improvements since 2002 workshop: Overview of available endstations

3:15 – 3:40
Marc Simon (Université Pierre et Marie Curie, Paris, France)
X-ray emission studies of ultrafast dissociation of HCl and other chlorine-containing molecules. XAS emission endstation hardware and software; technical capabilities

3:40 – 4:00 Follow on discussion

Part 3: Future directions, installations, funding
Moderator: H. Frei

4:00 – 4:10
Fred Schlachter (Lawrence Berkeley National Laboratory, Berkeley, CA)
Suggestions for new endstations: A short-term view

4:10 – 4:20
Robert Szilagyi (Montana State University, Bozeman, MT)
A proposal for extending the beamline's capabilities: A long-term plan

4:20 – General discussion about

• what we can do to improve the beamline and its capabilities,
• what we can do to improve and/or add to the suite of end stations,
• which scientific directions and/or  communities might we address to increase utilization of the beamline for great new science, and
• federal funding for realizing the long term beamline upgrade.

Organizers: Robert Szilagyi and Heinz Frei