Results 1 to 10 of about 2,678,972 (297)

Single-crystal x-ray diffraction structures of covalent organic frameworks

open access: yesScience, 2018
Covalent organic frameworks writ large Covalent organic framework (COF) materials have been difficult to characterize structurally and to exploit because they tend to form powders or amorphous materials. Ma et al.
Tianqiong Ma   +14 more
semanticscholar   +1 more source

Diffractive X-Ray Telescopes [PDF]

open access: yesX-Ray Optics and Instrumentation, 2010
Diffractive X-ray telescopes using zone plates, phase Fresnel lenses, or related optical elements have the potential to provide astronomers with true imaging capability with resolution several orders of magnitude better than available in any other waveband.
openaire   +2 more sources

Alpha- quartz quantitative X ray diffraction analysis

open access: yesMateriales de Construccion, 1967
Not ...
J. L. Sagrera
doaj   +1 more source

Ultrafast X-ray diffraction

open access: yes, 2005
This study presents recent developments and applications of ultrafast X-ray diffraction. These include optical pump/X-ray probe experiments for performing ultrafast X-ray spectroscopy, time-resolved X-ray diffraction for the investigation of electronically induced solid-liquid phase transformations in semiconductors, and time-resolved X-ray diffraction
Sokolowski-Tinten, Klaus   +9 more
openaire   +3 more sources

X-ray diffraction

open access: yesSpectroscopy, Diffraction and Tomography in Art and Heritage Science, 2021
After a general introduction to the crystalline state and the role of X-ray diffraction in heritage science, we discuss the interaction of X-rays with matter.
M. Dowsett, R. Wiesinger, M. Adriaens
semanticscholar   +1 more source

Advantages of Using Hard X-ray Photons for Ultrafast Diffraction Measurements

open access: yesPhotonics, 2023
We present a comparative theoretical study of silicon crystals irradiated with X-ray free-electron laser pulses, using hard X-ray photons of various energies.
Vladimir Lipp, Ichiro Inoue, Beata Ziaja
doaj   +1 more source

A green and efficient protocol for the synthesis of dihydropyrano[2,3-c]pyrazole derivatives via a one-pot, four component reaction by grinding method

open access: yesJournal of Advanced Research, 2015
An efficient grinding protocol for the synthesis of dihydropyrano[2,3-c]pyrazole derivatives from acetylene ester, hydrazine hydrate, aryl aldehydes and malononitrile under solvent free conditions has been achieved with excellent yields.
Sethurajan Ambethkar   +2 more
doaj   +1 more source

Dataset of asymmetric intramolecular [4+3] cycloaddition reactions catalyzed by NHC-gold(I) complexes

open access: yesData in Brief, 2019
The shared data is the unpublished portion of the experimental section for the article with the title “NHC–Au(I) catalyzed enantioselective intramolecular [4 + 3] cycloaddition of furan propargyl esters”.[1] The preparation of the intermediates for ...
Ruoyu Ma   +3 more
doaj   +1 more source

Subpicosecond X-ray diffraction

open access: yesLaser and Particle Beams, 1994
With the advent of ultrashort (subpicosecond) high-power lasers it is now possible to create intense bursts of X-rays with subpicosecond durations. An analysis of the temporal response of diffraction of such X-rays by crystals in both the dynamical and kinematic regime is presented. It is also shown that under certain conditions the temporal resolution
Wark, J, He, H
openaire   +2 more sources

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