A series of new 1D coordination polymer materials, based on Ag(I)-N bond formation, has been synthesized and structurally characterized by single crystal X-ray diffraction. Reactions between the poly-monodentate ligands based on (1E,1'E')-N,N'-(-bis(1-pyridin-3yl)methanimine and Ag(I) salts give products which feature simple coordination chains or metallacyclic-and tape-based structures. For the simple chains these are as either isolated units, or assembled in dimeric and tetrameric arrangements through inter-metallic, argentophilic interactions. However, crystal packing effects and solvent inclusion are found to readily disrupt this type of bonding. DFT calculations provide an assessment of the bond order and the influence of anion binding on these interactions.
Ground and excited states of CaCH3, CaNH2, CaOH, and CaF through electron propagator calculations J. Chem. Phys. 92, 6728 (1990); 10.1063/1.458257Highresolution electron microscopy study of (Ca,Sr)F2/GaAs grown by molecularbeam epitaxy Summary Abstract: High resolution electron microscopy of CaF2/silicon interfaces J.
Polished silicon substrates were e-gun deposited with 100-nm films of CaF2 in a molecular beam epitaxy vacuum station. Measurements of this material system reveal a factor of 35 reduction in reflectivity for films exposed to electron irradiation. Exposure is accomplished by simply viewing the desired area using a 3-kV Auger electron microprobe. It is further reported that this exposed inorganic material can be developed (selectively washed away) in H2O. In addition, both over and under exposures have been observed. Optimum electron exposure dose has been determined to be 0.1–0.2 C/cm2.
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