Matrix‐Isolation Study of the Water Dimer in Solid Nitrogen

1970 ◽  
Vol 52 (3) ◽  
pp. 1521-1528 ◽  
Author(s):  
Anthony J. Tursi ◽  
Eugene R. Nixon
Keyword(s):  
Matrix Isolation ◽  
Water Dimer ◽  
Solid Nitrogen

The Infrared Matrix Isolation Spectra of Water Species in a Deuterium Matrix

1979 ◽  
Vol 32 (6) ◽  
pp. 1167 ◽  
Author(s):  
EJ Murby ◽  
ADE Pullin
Keyword(s):  
Hydrogen Bonds ◽  
Matrix Isolation ◽  
Water Dimer ◽  
Cyclic Structure ◽  
Water Species

The spectra of matrices of deuterium at c.7 K containing water species derived from D2O, H2O and mixtures of D2O and H2O have been obtained in the region 4000-1000 cm-1. Six bands have been assigned to the fundamentals of (H2O)2, of (D2O)2 and of deuterium-bonded HDO dimeric species.A preference for HDO to form HO-D. . .O (deuterium) bonds rather than DO-H. . .O (hydrogen)bonds has been observed. The spectra in matrices of deuterium are closely similar to those observed in nitrogen matrices and support an open, rather than a cyclic, structure for the water dimer.

scholarly journals Complexes of Formaldehyde and α-Dicarbonyls with Hydroxylamine: FTIR Matrix Isolation and Theoretical Study

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1144
Author(s):  
Barbara Golec ◽  
Magdalena Sałdyka ◽  
Zofia Mielke
Keyword(s):  
Ab Initio ◽  
Ftir Spectroscopy ◽  
Theoretical Study ◽  
Matrix Isolation ◽  
Ab Initio Methods ◽  
Spectra Analysis ◽  
Planar Complex ◽  
Solid Nitrogen ◽  
Solid Argon ◽  
Bonded Complexes

The interactions of formaldehyde (FA), glyoxal (Gly) and methylglyoxal (MGly) with hydroxylamine (HA) isolated in solid argon and nitrogen were studied using FTIR spectroscopy and ab initio methods. The spectra analysis indicates the formation of two types of hydrogen-bonded complexes between carbonyl and hydroxylamine in the studied matrices. The cyclic planar complexes are stabilized by O–H⋯O(C), and C–H⋯N interactions and the nonplanar complexes are stabilized by O–H⋯O(C) bond. Formaldehyde was found to form with hydroxylamine, the cyclic planar complex and methylglyoxal, the nonplanar one in both argon and nitrogen matrices. In turn, glyoxal forms with hydroxylamine the most stable nonplanar complex in solid argon, whereas in solid nitrogen, both types of the complex are formed.

Matrix Infrared and Raman Spectroscopic Evidence for Pd(N2)3 in Solid Nitrogen

1972 ◽  
Vol 50 (14) ◽  
pp. 2385-2387 ◽  
Author(s):  
G. A. Ozin ◽  
M. Moskovits ◽  
P. Kùndig ◽  
H. Huber
Keyword(s):  
Raman Spectroscopy ◽  
Matrix Isolation ◽  
Absorption Intensity ◽  
Spectroscopic Evidence ◽  
Raman Spectroscopic ◽  
Solid Nitrogen ◽  
Infrared And Raman Spectroscopy ◽  
Intensity Calculations ◽  
Isotope Studies ◽  
Dinitrogen Complex

Cocondensation of palladium atoms with 14N2 at 4.2–10 °K leads to the formation of a binary dinitrogen complex. The complex is detected by matrix isolation infrared and Raman spectroscopy. Isotope studies using equimolar 14N2/15N2 mixtures, together with isotope frequency and integrated absorption intensity calculations, suggest that the species is tris-dinitrogen palladium(0), Pd(N2)3.

Infrared spectrum of the water dimer in solid nitrogen. II. Temperature and irradiation effects

1977 ◽  
Vol 66 (9) ◽  
pp. 4073-4077 ◽  
Author(s):  
Leif Fredin ◽  
Bengt Nelander ◽  
Göran Ribbegård
Keyword(s):  
Infrared Spectrum ◽  
Water Dimer ◽  
Irradiation Effects ◽  
Solid Nitrogen

Infrared spectrum of the water dimer in solid nitrogen. I. Assignment and force constant calculations

1977 ◽  
Vol 66 (9) ◽  
pp. 4065-4072 ◽  
Author(s):  
Leif Fredin ◽  
Bengt Nelander ◽  
Göran Ribbegård
Keyword(s):  
Infrared Spectrum ◽  
Force Constant ◽  
Water Dimer ◽  
Solid Nitrogen

Organization of tight junctions in the choroid plexus epithelium

1978 ◽  
Vol 36 (2) ◽  
pp. 336-337
Author(s):  
B. Van Deurs ◽  
J. K. Koehler
Keyword(s):  
Choroid Plexus ◽  
Present Report ◽  
Freeze Fracture ◽  
Barrier Properties ◽  
Cell Junctions ◽  
Structural Basis ◽  
Apical Surface ◽  
Choroid Plexus Epithelium ◽  
Solid Nitrogen ◽  
Special Composition

The choroid plexus epithelium constitutes a blood-cerebrospinal fluid (CSF) barrier, and is involved in regulation of the special composition of the CSF. The epithelium is provided with an ouabain-sensitive Na/K-pump located at the apical surface, actively pumping ions into the CSF. The choroid plexus epithelium has been described as “leaky” with a low transepithelial resistance, and a passive transepithelial flux following a paracellular route (intercellular spaces and cell junctions) also takes place. The present report describes the structural basis for these “barrier” properties of the choroid plexus epithelium as revealed by freeze fracture.Choroid plexus from the lateral, third and fourth ventricles of rats were used. The tissue was fixed in glutaraldehyde and stored in 30% glycerol. Freezing was performed either in liquid nitrogen-cooled Freon 22, or directly in a mixture of liquid and solid nitrogen prepared in a special vacuum chamber. The latter method was always used, and considered necessary, when preparations of complementary (double) replicas were made.

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