Methodical developments for X-ray diffraction measurements and data analysis on lyotropic liquid crystals applied to K-soap/glycerol systems

1999 ◽  
Vol 277 (8) ◽  
pp. 762-776 ◽  
Author(s):  
A. Hieke ◽  
H.-D. Dörfler
Keyword(s):  
Data Analysis ◽  
Liquid Crystals ◽  
Lyotropic Liquid Crystals ◽  
X Ray Diffraction ◽  
X Ray

Unexpected lyotropic liquid crystals from ion-induced columnar assembly of Schiff-base macrocycles

2012 ◽  
Vol 90 (12) ◽  
pp. 1056-1062 ◽  
Author(s):  
Joseph K.-H. Hui ◽  
Jian Jiang ◽  
Mark J. MacLachlan
Keyword(s):  
Electron Microscopy ◽  
Schiff Base ◽  
Liquid Crystals ◽  
Lyotropic Liquid Crystals ◽  
Metal Salts ◽  
Alkali Metal Salts ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Schiff Base Macrocycles

Schiff-base macrocycles 1, which have a crown ether-like interior, form ionic nematic lyotropic liquid crystals in various organic solvents when functionalized with long alkoxy substituents and complexed to diverse ammonium and alkali metal salts. From X-ray diffraction and transmission electron microscopy studies, and by comparison with the organization of macrocycles functionalized with shorter chains, these macrocycles assemble into lyotropic liquid crystals where the macrocycles are stacked and the cation is included in their interiors.

Four-stranded aggregates of oligodeoxyguanylates forming lyotropic liquid crystals: a study by circular dichroism, optical microscopy, and x-ray diffraction

1991 ◽  
Vol 113 (15) ◽  
pp. 5809-5816 ◽  
Author(s):  
Stefania Bonazzi ◽  
Massimo Capobianco ◽  
Monica Mirande De Morais ◽  
Anna Garbesi ◽  
Giovanni Gottarelli ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Liquid Crystals ◽  
Optical Microscopy ◽  
Lyotropic Liquid Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Circular Dichroïsm

scholarly journals XRD Data Visualization, Processing and Analysis with d1Dplot and d2Dplot Software Packages

Proceedings ◽  
2020 ◽  
Vol 62 (1) ◽  
pp. 9
Author(s):  
Oriol Vallcorba ◽  
Jordi Rius
Keyword(s):  
Data Analysis ◽  
Data Visualization ◽  
X Ray Diffraction ◽  
Specific Data ◽  
X Ray ◽  
Software Packages ◽  
Compound Database ◽  
Synchrotron Light ◽  
User Friendly ◽  
Transformation Processes

The d1Dplot and d2Dplot computer programs have been developed as user-friendly tools for the inspection and processing of 1D and 2D X-ray diffraction (XRD) data, respectively. d1Dplot provides general tools for data processing and includes the ability to generate comprehensive 2D plots of multiple patterns to easily follow transformation processes. d2Dplot is a full package for 2D XRD data. Besides general processing tools, it includes specific data analysis routines for the application of the through-the-substrate methodology [Rius et al. IUCrJ 2015, 2, 452–463]. Both programs allow the creation of a user compound database for the identification of crystalline phases. The software can be downloaded from the ALBA Synchrotron Light Source website and can be used free of charge for non-commercial and academic purposes.

scholarly journals AUSPEX: a graphical tool for X-ray diffraction data analysis

2017 ◽  
Vol 73 (9) ◽  
pp. 729-737 ◽  
Author(s):  
Andrea Thorn ◽  
James Parkhurst ◽  
Paul Emsley ◽  
Robert A. Nicholls ◽  
Melanie Vollmar ◽  
...  
Keyword(s):  
Data Analysis ◽  
Diffraction Data ◽  
Software Tool ◽  
Data Conversion ◽  
Data Sets ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pixel Detectors ◽  
Graphical Tool ◽  
Data Acquisition And Processing

In this paper,AUSPEX, a new software tool for experimental X-ray data analysis, is presented. Exploring the behaviour of diffraction intensities and the associated estimated uncertainties facilitates the discovery of underlying problems and can help users to improve their data acquisition and processing in order to obtain better structural models. The program enables users to inspect the distribution of observed intensities (or amplitudes) against resolution as well as the associated estimated uncertainties (sigmas). It is demonstrated howAUSPEXcan be used to visually and automatically detect ice-ring artefacts in integrated X-ray diffraction data. Such artefacts can hamper structure determination, but may be difficult to identify from the raw diffraction images produced by modern pixel detectors. The analysis suggests that a significant portion of the data sets deposited in the PDB contain ice-ring artefacts. Furthermore, it is demonstrated how other problems in experimental X-ray data caused, for example, by scaling and data-conversion procedures can be detected byAUSPEX.

Structure of aB6-like phase formed from bent-core liquid crystals determined by microbeam x-ray diffraction

2007 ◽  
Vol 76 (4) ◽  
Author(s):  
Sungmin Kang ◽  
Masatoshi Tokita ◽  
Yoichi Takanishi ◽  
Hideo Takezoe ◽  
Junji Watanabe
Keyword(s):  
Liquid Crystals ◽  
X Ray Diffraction ◽  
X Ray

Thermal and X-Ray Diffraction Studies of Liquid Crystals Incorporating a Perfluoroalkyl Group

1991 ◽  
Vol 204 (1) ◽  
pp. 9-14 ◽  
Author(s):  
T. Doi ◽  
S. Takenaka ◽  
S. Kusabayashi ◽  
Y. Nishihata ◽  
H. Terauchi
Keyword(s):  
Liquid Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Perfluoroalkyl Group

D-67 High-Resolution X-ray Diffraction Data Analysis From The Partly Relaxed Semiconductor Structures

2009 ◽  
Vol 24 (2) ◽  
pp. 171-171
Author(s):  
A. Ulyanenkov ◽  
A. Benediktovitch ◽  
I. Feranchuk ◽  
B. He ◽  
H. Ress
Keyword(s):  
Data Analysis ◽  
High Resolution ◽  
Diffraction Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Semiconductor Structures
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