Crystallography Chemistry
Crystallography Chemistry - Related Videos
02:18
X-ray Crystallography
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2020
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography. Diffraction Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
08:42
Coordination Chemistry Complexes
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2023
Source: Laboratory of Dr. Neal Abrams — SUNY College of Environmental Science and Forestry Transition metals are found everywhere from vitamin supplements to electroplating baths. Transition metals also make up the pigments in many paints and compose all minerals. Typically, transition metals are found in the cationic form since they readily oxidize, or lose electrons, and are surrounded by electron donors called ligands. These ligands do not form ionic or covalent bonds with the metal center,...
07:55
An All-in-one Sample Holder for Macromolecular X-ray Crystallography with Minimal Background Scattering
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Cited by 4 •
2019
A novel sample holder for macromolecular X-ray crystallography along with a suitable handling protocol is presented. The system allows crystal growth, crystal soaking and in situ diffraction data collection at both, ambient and cryogenic temperature without the need of any crystal manipulation or mounting.
09:23
Assessing Two-dimensional Crystallization Trials of Small Membrane Proteins for Structural Biology Studies by Electron Crystallography
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Cited by 7 •
2010
Evaluating two-dimensional (2D) crystallization trials for the formation of ordered membrane protein arrays is a highly critical and difficult task in electron crystallography. Here we describe our approach in screening for and identifying 2D crystals of predominantly small membrane proteins in the range of 15 – 90kDa.
12:31
Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry
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Cited by 14 •
2012
Adenovirus particles are engineered to contain either the unnatural amino acid analogue azidohomoalanine or the azido sugar O-GlcNAz. The azide group of each is chemoselectively ligated via "click" chemistry reactions as a means of viral surface modification.
FAQs
The measured intensities from diffracted X-rays provide the data needed to calculate an electron-density map. Researchers interpret this map to construct a three-dimensional model showing where atoms, ions, or molecules are arranged within the crystal lattice. The resulting model can then support analysis of molecular geometry, bond lengths, symmetry, and interactions between neighboring molecules.
Crystallographic models show precise relationships among the components of an ordered solid, including bond lengths, molecular geometry, symmetry, and intermolecular interactions. This information distinguishes possible structural arrangements that may share a chemical identity but differ in organization. Such detail helps connect a compound’s microscopic architecture with its chemical behavior and material properties.
The arrangement of atoms, ions, or molecules in a crystal lattice can influence the properties displayed by the material. Because crystallography connects this microscopic organization with observed chemical behavior and performance, it helps explain why structural differences matter. This relationship is especially relevant when studying compounds, minerals, catalysts, pharmaceuticals, and other functional materials.
A typical analysis begins by exposing a crystal to an X-ray beam and recording the resulting diffraction intensities. Those measurements are used to calculate an electron-density map, from which researchers build a three-dimensional structural model. They then examine features such as atomic arrangement, bond lengths, geometry, symmetry, and intermolecular interactions to interpret the chemical structure.
The method is valuable when researchers need structural evidence for compound identification, mechanistic studies, or material design. Its models can clarify how components are organized in pharmaceuticals, catalysts, minerals, and functional materials. By revealing molecular geometry and lattice-level interactions, crystallographic analysis provides information that supports both chemical interpretation and the development of materials with targeted properties.
In pharmaceutical research, the structural model can reveal molecular geometry and intermolecular interactions relevant to identifying and understanding compounds. In catalyst studies, the same structural information helps researchers examine how a material is organized at the microscopic level while investigating chemical mechanisms. These applications use crystallography to relate ordered structure to chemical behavior and performance.