Prof. David J. Sellmyer, Faculty Supervisor
TBA, Specialist
Location: 33 Hamilton Hall
University of Nebraska
Lincoln, NE 68588-0304
phone: (402) 472-7886
e-mail: skrupicka1@unl.edu
website: http://www.unl.edu/ncmn/crystal/
Crystallography
Aug. 15, 2008 - The Facility is currently closed. If you have questions, please contact NCMN Administrative Coordinator Shelli Krupicka at 472-7886.
The Nebraska Center for Materials and Nanoscience NCMN) Crystallography Central Facility has been established to bring on-site small molecule crystal structure determination and analysis to UNL. Services provided include unit cell determinations, complete structure determinations, and collection of single crystal data for users to solve and refine themselves. A Bruker AXS SMART APEX instrument equipped with an Oxford Cryosystems 700 series Cryostream is used to collect the single crystal data. A Meiji stereo zoom microscope with polarizer attachment is used to select single crystal samples. A special fitting for the Meiji microscope allows a digital camera to photograph the crystals.
The facility holds licenses for the Bruker AXS software, including SMART, SAINT, SADABS, SHELXTL and XSHELL, as well as ATOMS and the Cambridge Structural Database (CSD). There are also many freeware crystallography programs which are maintained on the facility computers, such as PLATON and ORTEP. There are one Mac and 3 PC’s available in the facility for collecting data and performing structure determinations. The specialist is available daily for consultation and can provide advice on crystallization techniques or problems.
Facility Policies:
Data collection and structure determinations are performed on a first-come, first-serve basis. If you are preparing a highly unstable and possibly fleeting material, make arrangements ahead of time with the specialist. When a structure is considered final and complete, a CD will be written containing all pertinent data and distributed to the user who submitted the crystal. If users develop a later need for different pictures or new analysis of interactions, they should see the specialist with the archived CD in hand. A folder will be saved on your archive CD called FINAL. All pertinent files (.cif, .res, tables, ortep, etc.) will be saved in this folder.
You are responsible for safekeeping your own released data.
If you need to meet with the specialist, please visit the facility for questions and information.
The Bruker AXS SMART APEX CCD X-ray Diffractometer. The instrument is equipped with a 4K Apex CCD detector, a Mo sealed-tube X-ray source, and MonoCap collimator, and an Oxford Cryosystems 700 Series Cryostream Cooler. The data collection temperature ranges from 80 to 400 K. The standard operating temperature is 120 K for materials that do not undergo phase transitions. Users are encouraged to communicate their preference for data collection temperature.
© 2009 MRSEC | University of Nebraska-Lincoln | 213A Ferguson Hall | Lincoln, NE 68588-0111 | 402-472-6933
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