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3 results on '"X-ray diffract"'

1. Sintered Ceramic Materials Based on Zeolite Raw Material from the Amur Region.

Author

Demchuk, V., Kalinichenko, B., and Sokolova, S.

Subjects
*ZEOLITES, *CERAMIC materials, *CATALYST supports, *SINTERING, *KAOLIN
Abstract

The results of investigations on the development of a porous zeolite ceramic based on native raw material from the Amur region for filters and catalyst carriers are presented. The structural and mechanical properties of the obtained material were studied. It is shown that kaolin as a sintering additive in firing strengthens the blanks. [ABSTRACT FROM AUTHOR]

Published
2017
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2. The Structural Diversity of Benzofuran Resorcinarene Leads to Enhanced Fluorescence

Author

Janne A. Ihalainen, Tiia-Riikka Tero, Maija Nissinen, Kirsi Salorinne, Heli Lehtivuori, and Biophysics Photosynthesis/Energy

Subjects
calixarenes, Stereochemistry, Phenylalanine, Cyclohexane conformation, Molecular Conformation, Supramolecular chemistry, Chemistry Techniques, Synthetic, Conjugated system, Crystallography, X-Ray, Biochemistry, supramolecular chemistry, Structure-Activity Relationship, chemistry.chemical_compound, Calixarene, Polymer chemistry, supramolekulaarinen kemia, resorcinarenes, Moiety, Benzofuran, X-ray diffract, ta116, Benzofurans, Molecular Structure, Organic Chemistry, fluoresenssi, ta1182, benzofuran, General Chemistry, Resorcinarene, Fluorescence, X-ray diffraction, Spectrometry, Fluorescence, chemistry, fluorescence
Abstract

An unexpected and previously unknown resorcinarene mono-crown with a fused benzofuran moiety in its macrocyclic core was obtained as a byproduct from a bridging reaction of tetramethoxy resorcinarene with tetraethylene glycol ditosylate. The formation of the fused benzofuran moiety in the resorcinarene macrocycle resulted in a unique rigid and puckered boat conformation, as shown by XRD studies in the solid state. Modification of the macrocycle was also observed to affect the photophysical properties in solution by enhancing the fluorescence brightness compared with a conventional resorcinarene macrocycle. The fluorescent properties enabled unique detection of structural features, that is, the rigid boat conformation with the conjugated benzofuran system and the more flexible crown bridge part, in solution. peerReviewed

Published
2014
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