Chemistry with F Centers: Reduction of Organic Molecules on the Defective Potassium Chloride(100) Surface

2020 ◽  
Vol 124 (23) ◽  
pp. 12606-12616 ◽  
Author(s):  
Michael Häfner ◽  
Manuel Hochheim ◽  
Thomas Bredow
Keyword(s):  
Potassium Chloride ◽  
Organic Molecules ◽  
F Centers

Diffusion of F-centers in potassium chloride crystals

1972 ◽  
Vol 50 (1) ◽  
pp. 367-377 ◽  
Author(s):  
G. C. Kuczynski ◽  
J. J. Byun
Keyword(s):  
Potassium Chloride ◽  
F Centers

Effect of Divalent Cations on the Coagulation of F Centers in Potassium Chloride

1959 ◽  
Vol 30 (1) ◽  
pp. 342-343 ◽  
Author(s):  
L. Richard Watson ◽  
Allen B. Scott
Keyword(s):  
Potassium Chloride ◽  
Divalent Cations ◽  
F Centers

Preparation of a potassium chloride bridged thorium phosphinidiide complex and its reactivity towards small organic molecules

2019 ◽  
Vol 43 (24) ◽  
pp. 9527-9539 ◽  
Author(s):  
Yongsong Wang ◽  
Congcong Zhang ◽  
Guofu Zi ◽  
Wanjian Ding ◽  
Marc D. Walter
Keyword(s):  
Potassium Chloride ◽  
Electronic Properties ◽  
Organic Molecules ◽  
Small Organic Molecules

The steric and electronic properties of the coordinated ligands modulate the reactivity of thorium phosphinidene complexes.

Optical stability of F centers in potassium chloride ?cleavage? and ordinary whiskers

1976 ◽  
Vol 19 (1) ◽  
pp. 107-110
Author(s):  
I. Ya. Melik-Gaikazyan ◽  
A. N. Kravets ◽  
A. A. Zhaksylykova
Keyword(s):  
Potassium Chloride ◽  
Optical Stability ◽  
F Centers

High Resolution Replication of Organoclay Surfaces

1982 ◽  
Vol 40 ◽  
pp. 576-577
Author(s):  
W. W. Barker ◽  
W. E. Rigsby ◽  
V. J. Hurst ◽  
W. J. Humphreys
Keyword(s):  
Clay Mineral ◽  
Organic Molecule ◽  
Organic Molecules ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Naturally Occurring ◽  
Silicate Layers ◽  
Mineral Identification

Experimental clay mineral-organic molecule complexes long have been known and some of them have been extensively studied by X-ray diffraction methods. The organic molecules are adsorbed onto the surfaces of the clay minerals, or intercalated between the silicate layers. Natural organo-clays also are widely recognized but generally have not been well characterized. Widely used techniques for clay mineral identification involve treatment of the sample with H2 O2 or other oxidant to destroy any associated organics. This generally simplifies and intensifies the XRD pattern of the clay residue, but helps little with the characterization of the original organoclay. Adequate techniques for the direct observation of synthetic and naturally occurring organoclays are yet to be developed.

Direct phase determination in electron crystallography: small organic molecules

1992 ◽  
Vol 50 (2) ◽  
pp. 1166-1167
Author(s):  
Douglas L. Dorset
Keyword(s):  
Organic Molecules ◽  
Data Sets ◽  
Temperature Structure ◽  
3D Analysis ◽  
Intensity Data ◽  
Electron Crystallography ◽  
Phase Determination ◽  
Measured Intensity ◽  
3D Data

The quantitative use of electron diffraction intensity data for the determination of crystal structures represents the pioneering achievement in the electron crystallography of organic molecules, an effort largely begun by B. K. Vainshtein and his co-workers. However, despite numerous representative structure analyses yielding results consistent with X-ray determination, this entire effort was viewed with considerable mistrust by many crystallographers. This was no doubt due to the rather high crystallographic R-factors reported for some structures and, more importantly, the failure to convince many skeptics that the measured intensity data were adequate for ab initio structure determinations.We have recently demonstrated the utility of these data sets for structure analyses by direct phase determination based on the probabilistic estimate of three- and four-phase structure invariant sums. Examples include the structure of diketopiperazine using Vainshtein's 3D data, a similar 3D analysis of the room temperature structure of thiourea, and a zonal determination of the urea structure, the latter also based on data collected by the Moscow group.

Sign in / Sign up

Export Citation Format

Share Document