X-Ray Diffraction Facility X-ray crystal structure determination is an important technique for most inorganic and organic chemists. The X-ray Diffraction Laboratory at UMSL supports crystallographic research conducted globally within numerous academic and industrial research groups. The Laboratory is equipped with state-of-the-art instrumentation and computational facilities for solid-state three-dimensional crystal and molecular structure determinations. The single crystal and powder diffraction facility resides within the Center for Nanoscience, which opened in November 1996.
For more information please contact Dr. Rajamoni Jagan by email: jrbrm@umsl.edu
SINGLE CRYSTAL X-RAY DIFFRACTION INSTRUMENTATION
The Bruker Venture-Duo PHOTON-II Kappa Diffractometer is a state-of-the art single crystal diffractometer equipped with two Incotec micro-focus X-ray sources (Cu and Mo), a PHOTON-II CPAD (Charge-integrating Pixel Array Detector) detector, and an attached Oxford Cryostream-800 cold head. The Kappa orientation instrument allows for rapid and shutter-less data collection are routine using its Kappa orientated can be carried out at various temperatures (85 – 300 K) for small, highly sensitive, and weakly diffracting samples. Absolute configuration of molecules may also be determined using this system.
The Bruker APEX II Kappa Diffractometer is a Kappa orientation instrument equipped with a sealed tube (Mo) X-ray source, a 4K CCD (Charge Coupled Device) chip detector, and an Oxford Cryostream low temperature cold head that allows for fast data collection at various temperatures (85 – 300 K)The primary mission of his diffractometer is to collect data for larger, stable crystals, teaching, and user training purposes.
POWDER DIFFRACTION INSTRUMENTATION
A Rigaku Ultima IV Powder Diffractometer is a Bragg-Brentano focusing geometry instrument equipped with a horizontal sample stage (3 – 150° range), a monochromated and sealed X-ray tube (Mo) source, a scintillation detector, and hot stage (ambient to 1500 °C) with PTC-30 temperature controller. It is primarily used for the characterization of air- and water-sensitive powders, thin films, and in-plane and small angle X-ray scattering (SAXS) applications. The instrument provides a valuable analytical tool for the identification of single and multi-component solids and phases via comparison to known powder patterns. This information is generally useful in determination of crystallite size/strain analysis, lattice parameters, percent crystallinity, and sample homogeneity.
COMPUTER FACILITIES AND OTHER INSTRUMENTATION
The X-ray Laboratory Computing Facility has several workstations running crystallographic software. All computers in the lab are integrated with the university computer network.
The Cambridge Structural Database (CSD) is available to all students, faculty and staff for their teaching and research projects.
The sample preparation laboratory is equipped with Stereo/Polarizing microscopes with digital video capabilities for screening and mounting crystals; fume hood, refrigerator and freezer for crystallization and sample storage, together with other necessary facilities for crystallization and crystal handling.
SERVICES
USERS
The X-ray diffraction facility is opened to both UMSL users and External users (academic and non-academic).
FEES
Charges for using the X-Ray Diffraction Facility at UMSL are available on request.
SAMPLE SUBMISSION
Users can submit their samples by filling user request form with sample details.
Mailing Address:
Users from remote places can submit their samples through the following address.
Department of Chemistry and Biochemistry
University of Missouri – Saint Louis
One University Boulevard
Saint Louis, MO 63121
USER TRAINING
Upon request the X-Ray Diffraction Facility at UMSL offer crystallographic training to graduate students and Research scholars from universities who uses crystal structure determination as part of their research.
Hands on training such as crystal selection, crystal mounting and data collection is provided with Bruker X8 APEX II Kappa Diffractometer.
ACKNOWLEDGEMENT
Users who do the single crystal structural analysis from UMSL X-Ray Diffraction Laboratory should mention in the acknowledgement up on publishing their results. Acknowledgement can be mentioned as "X-Ray Diffraction Facility at Department of Chemistry and Biochemistry, University of Missouri St. Louis."
CONTACT US:Dr. Rajamoni Jagan, jrbrm@umsl.edu
Dr. Keith J. Stine, kstine@umsl.edu
