Mapping the molecular pathway during photoaddition of guest acetophenone and p-fluoroacetophenone to host deoxycholic acid as studied by x-ray diffraction in systems undergoing single-crystal-to-single-crystal transformation

1987 ◽  
Vol 109 (13) ◽  
pp. 3883-3893 ◽  
Author(s):  
H. C. Chang ◽  
R. Popovitz-Biro ◽  
M. Lahav ◽  
L. Leiserowitz
Keyword(s):  
Single Crystal ◽  
Deoxycholic Acid ◽  
X Ray Diffraction ◽  
X Ray ◽  
Molecular Pathway ◽  
Crystal Transformation

Reversible photo/thermoswitchable dual-color fluorescence through single-crystal-to-single-crystal transformation

2017 ◽  
Vol 46 (2) ◽  
pp. 338-341 ◽  
Author(s):  
Fei Fei Li ◽  
Le Zhang ◽  
Le Le Gong ◽  
Chang Sheng Yan ◽  
Heng Ya Gao ◽  
...  
Keyword(s):  
Single Crystal ◽  
Light Stimulus ◽  
X Ray Diffraction ◽  
Blue Fluorescence ◽  
X Ray ◽  
Crystal Transformation ◽  
Dual Color

A rare example of the insertion of a 1D polymer in a MOF using a light stimulus and subsequent characterization using single crystal X-ray diffraction is reported. An uncommon reversible photo/thermoswitchable dual-color green-to-blue fluorescence is observed.

Solvent-triggered single-crystal-to-single-crystal transformation from a monomeric to polymeric copper(II) complex based on an aza macrocyclic ligand

2020 ◽  
Vol 76 (2) ◽  
pp. 225-232 ◽  
Author(s):  
Jong Won Shin ◽  
Ah Rim Jeong ◽  
Younghak Kim ◽  
Dae-Woong Kim ◽  
Sang-Geul Lee ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Single Crystal ◽  
Self Assembly ◽  
Macrocyclic Ligand ◽  
Adsorption Behaviour ◽  
X Ray Diffraction ◽  
X Ray ◽  
Crystal Transformation ◽  
Hydrogen Bonding Interactions

Reversible solvent-triggered single-crystal-to-single-crystal (SCSC) transformations are observed between two copper(II) azamacrocyclic complexes: [Cu(C16H38N6)(H2O)2](C12H6O4) (1) and [Cu(C16H38N6)(C12H6O4)] (2). Complex (1) was prepared via self-assembly of a copper(II) azamacrocyclic complex containing butyl pendant groups, [Cu(C16H38N6)(ClO4)2], with 2,7-naphthalenedicarboxylic acid. When monomeric compound (1) was immersed in CH3OH, coordination polymer (2) was obtained, indicating a solvent-triggered SCSC transformation. Furthermore, when (2) was immersed in water, an reverse SCSC transformation from (2) to (1) occurred. Complex (1) presents a 3D supramolecular structure formed via intermolecular hydrogen-bonding interactions, whereas complex (2) features a 1D zigzag coordination polymer. The reversible SCSC transformation of (1) and (2) was characterized using single-crystal X-ray diffraction and in situ powder X-ray diffraction techniques. Despite its poor porosity, complex (2) displayed interesting CO2 adsorption behaviour under CO2 gas.

Electron Microscopy of Shock Loaded Polycrystalline Beryllium

1974 ◽  
Vol 32 ◽  
pp. 506-507 ◽  
Author(s):  
J. M. Galbraith ◽  
L. E. Murr ◽  
A. L. Stevens
Keyword(s):  
Electron Microscopy ◽  
Wave Propagation ◽  
Structural Change ◽  
Single Crystal ◽  
Diffraction Pattern ◽  
Shock Loading ◽  
Slip Systems ◽  
Compression Tests ◽  
X Ray Diffraction ◽  
X Ray

Uniaxial compression tests and hydrostatic tests at pressures up to 27 kbars have been performed to determine operating slip systems in single crystal and polycrystal1ine beryllium. A recent study has been made of wave propagation in single crystal beryllium by shock loading to selectively activate various slip systems, and this has been followed by a study of wave propagation and spallation in textured, polycrystal1ine beryllium. An alteration in the X-ray diffraction pattern has been noted after shock loading, but this alteration has not yet been correlated with any structural change occurring during shock loading of polycrystal1ine beryllium.This study is being conducted in an effort to characterize the effects of shock loading on textured, polycrystal1ine beryllium. Samples were fabricated from a billet of Kawecki-Berylco hot pressed HP-10 beryllium.

Crystal structure of an inclusion complex between chiral monoaza-15-crown-5 and S(–)-1-phenyl-ethyl ammonium percholorate

2003 ◽  
Vol 218 (5) ◽  
Author(s):  
Süheyla Özbey ◽  
F. B. Kaynak ◽  
M. Toğrul ◽  
N. Demirel ◽  
H. Hoşgören
Keyword(s):  
Crystal Structure ◽  
Inclusion Complex ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
New Type

AbstractA new type of inclusion complex, S(–)-1 phenyl ethyl ammonium percholorate complex of R-(–)-2-ethyl - N - benzyl - 4, 7, 10, 13 - tetraoxa -1- azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray diffraction techniques. The compound crystallizes in space group

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