Central Facilities

X-Ray Facilities

Overview
The X-ray Facilities provides routine structural characterization of organic, inorganic and organometallic compounds. Our services include crystal inspection and selection, unit cell determination, data collection at low temperature (103K), data processing, structure solution, and structure refinement. The lab also provides access to the Cambridge Structure Database (CSD).

Instruments
The X-ray Facilities at CBC Central Instrument Facilities is equipped with two state of the art single crystal diffractometers for single crystal diffractions and two polarizing microscopes, one of which is coupled with a digital camera to take pictures of crystals.

     Bruker X8 CCD Diffractometer                     Bruker Kappa CCD Diffractometer

Submit samples

Samples should be single crystals. Generally, single crystals of organic compounds are translucent and have a fairly well-defined shape (e.g., cubes, prisms, plates, or needles). Samples should be placed in a clean, dry, and permanently labeled vial. For unstable crystals which lose solvent molecules and become opaque, keep the crystals in the solvent in which they were grown.

To submit samples, just leave the sample vial together with the duly signed request form on the desk outside the X-ray lab.

After the data collection, the samples can be found on the desk outside the X-ray lab. The samples would be discarded after 15 days.

CIF would only be provided during the submission of the paper that involves the structure.

Publishing Structural Data and Authorship

The crystallographer should be considered for co-authorship when the structural information is an important part of the paper and structural information has been derived primarily from X-ray crystallography that utilized the expertise of the service. The crystallographer should assist in the preparation of the manuscript.

If crystal structure determination is used only to confirm information obtained by other analytical means and no structural details are given in the paper, an acknowledgment for assistance is appropriate. In such cases, the crystallographer and those involved in the structure determination would be allowed to publish the structural results independently.

Useful links

Growing Crystals That Will Make Your Crystallographer Happy

International Union of Crystallography


 

 


Contact Information
Dr LI Yongxin

Phone: (65) 6316 8843
E-mail: yongxin@ntu.edu.sg
 
Dr Rakesh GANGULY

Phone: (65) 6592 1698
E-mail: RGANGULY@ntu.edu.sg

 

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