Temperature Dependences of the Hyperfine Interactions, Linewidths, and Line Asymmetries in Methyl Radicals Stabilized on Porous Glass Surfaces

1968 ◽  
Vol 48 (10) ◽  
pp. 4605-4614 ◽  
Author(s):  
G. B. Garbutt ◽  
H. D. Gesser ◽  
M. Fujimoto
Keyword(s):  
Porous Glass ◽  
Hyperfine Interactions ◽  
Methyl Radicals ◽  
Temperature Dependences ◽  
Glass Surfaces

Paramagnetic Resonance Spectra of Methyl Radicals on Porous Glass Surfaces

Science ◽  
1967 ◽  
Vol 156 (3778) ◽  
pp. 1105-1106 ◽  
Author(s):  
M. Fujimoto ◽  
H. D. Gesser ◽  
B. Garbutt ◽  
M. Shimizu
Keyword(s):  
Porous Glass ◽  
Methyl Radicals ◽  
Paramagnetic Resonance ◽  
Glass Surfaces

Application of the optical method for determining of the RMS roughness of porous glass surfaces

2008 ◽  
Vol 354 (28) ◽  
pp. 3241-3245 ◽  
Author(s):  
E. Dobierzewska-Mozrzymas ◽  
E. Rysiakiewicz-Pasek ◽  
P. Biegański ◽  
J. Polańska ◽  
E. Pieciul
Keyword(s):  
Porous Glass ◽  
Optical Method ◽  
Glass Surfaces

Infrared spectra of the interactions of aniline and porous glass surfaces

1969 ◽  
Vol 47 (8) ◽  
pp. 1281-1287 ◽  
Author(s):  
M. J. D. Low ◽  
V. V. Subba Rao
Keyword(s):  
Nitrogen Atom ◽  
Aromatic Ring ◽  
Secondary Amine ◽  
Infrared Spectra ◽  
Porous Glass ◽  
Weak Interactions ◽  
Amine Group ◽  
Oh Groups ◽  
Glass Surfaces ◽  
Adsorption And Dissociation

Infrared spectra were recorded of aniline sorbed on highly dehydroxylated, deuterated, and on fluoridated porous glass as well as on pure and boria-impregnated silica. The results suggest that two types of weak interactions involving the surface SiOH and B—OH groups occurred; the nitrogen atom of the amine was hydrogen bonded to surface OH and there was an interaction between OH groups and the π system of the aromatic ring. Some aniline chemisorbed on surface boron via the nitrogen atom of the amine group. Some aniline chemisorbed dissociatively to form secondary amine structures bonded through the nitrogen to surface boron atoms and new B—OH groups formed. Surface boron impurity acted as an adsorption and dissociation center.

Infrared study of the interactions of acetone and siliceous surfaces

1969 ◽  
Vol 47 (14) ◽  
pp. 2545-2554 ◽  
Author(s):  
J. C. McManus ◽  
Yoshio Harano ◽  
M. J. D. Low
Keyword(s):  
Hydrogen Bonds ◽  
Carbonyl Group ◽  
Boron Atom ◽  
Porous Glass ◽  
Carbonyl Groups ◽  
Infrared Study ◽  
Oh Groups ◽  
Silica Surfaces ◽  
Surface Hydroxyls ◽  
Glass Surfaces

Adsorbed acetone is held to silica surfaces by hydrogen bonds between surface silanols and the acetone carbonyl groups. Acetone is adsorbed by this mechanism on porous glass surfaces but there is also some decomposition, as shown by the increase in surface B—OH groups and by formation of new C—H absorptions at 2984 and 2940 cm−1. Experiments with boron-impregnated silica indicated that the presence of boron in the porous glass can account for this decomposition process. Bands at 1660–1670 and 1650 cm−1, observed when acetone and acetone-d6, respectively, were adsorbed on either porous glass or boron-impregnated silica, are attributed to ν(C=O) of the carbonyl group coordinated with a surface boron atom. The surface hydroxyls of both silica and porous glass could exchange with the deuterium of acetone-d6 via a mechanism involving an enol intermediate.

FORMATION OF THE CHARGE DENSITY WAVES IN THE β-TYPE OXIDE VANADIUM BRONZES NaxV2O5

1992 ◽  
Vol 06 (09) ◽  
pp. 1491-1503 ◽  
Author(s):  
A.V. DMITRIEV ◽  
N.A. ZHURAVLEV ◽  
V.L. VOLKOV
Keyword(s):  
Phase Transition ◽  
Charge Density ◽  
Hyperfine Interactions ◽  
Density Wave ◽  
Charge Density Waves ◽  
Joint Analysis ◽  
Gap Formation ◽  
Temperature Dependences ◽  
Wave Development ◽  
A Charge

NMR of 51 V and 27 Na in monocrystals β- Na x V 2O5(x=0.22, 0.27, 0.33) has been studied between 80 K and 400 K. Temperature dependences of hyperfine interactions have been investigated. In all compositions under study, a phase transition has been observed, its temperature has decreased with a reducing natrium content. A joint analysis of magnetic susceptibilities and resonance shifts showed that the phase transition has been connected with a gap formation at the Fermi level. Investigations of quadrupole effects and electroconductivities allowed to establish that the phase transition has been accompanied by a charge density wave development. On the basis of NMR measurements, an electron localization region has been evaluated. The results have been compared with electrophysical data.

Ellipsometry and spectroscopy of porous glass surfaces

Vacuum ◽  
2001 ◽  
Vol 61 (2-4) ◽  
pp. 123-128 ◽  
Author(s):  
V.S. Ovechko ◽  
A.M. Dmytruk ◽  
O.V. Fursenko ◽  
T.P. Lepeshkina
Keyword(s):  
Porous Glass ◽  
Glass Surfaces

Reactions of ammonia with porous glass surfaces

1967 ◽  
Vol 71 (6) ◽  
pp. 1726-1734 ◽  
Author(s):  
Manfred J. D. Low ◽  
Natesan Ramasubramanian ◽  
V. V. Subba Rao
Keyword(s):  
Porous Glass ◽  
Glass Surfaces
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