scholarly journals Infrared intensities and molar refraction of amorphous dimethyl carbonate – comparisons to four interstellar molecules

2019 ◽  
Vol 21 (21) ◽  
pp. 11284-11289 ◽  
Author(s):  
Reggie L. Hudson ◽  
Falvia M. Coleman
Keyword(s):  
Refractive Index ◽  
Dimethyl Carbonate ◽  
Molar Refraction ◽  
Interstellar Molecules ◽  
Infrared Intensities

The first measurements of infrared (IR) band intensities of solid dimethyl carbonate are presented along with measurements of this compound's refractive index and density near 15 K, neither of which has been reported.

Infrared Intensities of Liquids XX: The Intensity of the OH Stretching Band of Liquid Water Revisited, and the Best Current Values of the Optical Constants of H2O(l) at 25°C between 15,000 and 1 cm−1

1996 ◽  
Vol 50 (8) ◽  
pp. 1047-1057 ◽  
Author(s):  
John E. Bertie ◽  
Zhida Lan
Keyword(s):  
Refractive Index ◽  
Liquid Water ◽  
Peak Height ◽  
Dielectric Constants ◽  
The Real ◽  
Infrared Intensities ◽  
Refractive Index Spectrum ◽  
Relative Errors ◽  
Integrated Intensities ◽  
Normal Laboratory

The previously reported nonreproducibility of the intensity of the OH stretching band of liquid water has been explored. It was found that it can be eliminated in measurements with the Circle® multiple ATR cell by ensuring that the ATR rod is coaxial with the glass liquid holder. It was also found that normal laboratory temperature variations of a few degrees change the intensity by ⩽∼1% of the peak height. A new imaginary refractive index spectrum of water has been determined between 4000 and 700 cm1 as the average of spectra calculated from ATR spectra recorded by four workers in our laboratory over the past seven years. It was obtained under experimental and computational conditions superior to those used previously, but is only marginally different from the spectra reported in 1989. In particular, the integrated intensities of the fundamentals are not changed significantly from those reported in 1989. The available imaginary refractive index, k, values between 15,000 and 1 cm−1 have been compared. The values that are judged to be the most reliable have been combined into a recommended k spectrum of H2O(l) at 25 °C between 15,000 and 1 cm−1, from which the real refractive index spectrum has been calculated by Kramers–Kronig transformation. The recommended values of the real and imaginary refractive indices and molar absorption coefficients of liquid water at 25 ± 1 °C are presented in graphs and tables. The real and imaginary dielectric constants and the real and imaginary molar polarizabilities in this wavenumber range can be calculated from the tables. Conservatively estimated probable errors of the recommended k values are given. The precision with which the values can be measured in one laboratory and the relative errors between regions are, of course, far smaller than these probable errors. The recommended k values should be of considerable value as interim standard intensities of liquid water, which will facilitate the transfer of intensities between laboratories.

Spectroscopic Properties of Rare Earth Ion Doped TeO2-B2O3-PbO Glass

2014 ◽  
Vol 69 (6) ◽  
Author(s):  
A. Noranizah ◽  
K. Azman ◽  
H. Azhan ◽  
E. S. Nurbaisyatul ◽  
A. Mardhiah
Keyword(s):  
Refractive Index ◽  
Rare Earth ◽  
Glass Sample ◽  
Spectroscopic Properties ◽  
Molar Refraction ◽  
Energy Band Gap ◽  
Melt Quenching ◽  
Rare Earth Ion ◽  
Optical Energy Band Gap ◽  
Oxide Ion

This work focuses on the spectroscopic study of RE3+ ion, namely, trivalent neodymium (Nd3+) doped lead borotellurite glass with a composition of TeO2-B2O3-PbO. The glass sample has been prepared by conventional melt-quenching technique. The density, molar volume and optical energy band gap of these glasses have been measured. The refractive index, molar refraction and polarizability of oxide ion have been calculated by using Lorentz-Lorentz relations. The absorption spectra are recorded using UV-Vis-NIR spectrometer in the range of 200-900 nm.

scholarly journals Density and Refractive Index for Binary Systems of the Ionic Liquid [Bmim][BF4] with Methanol, 1,3-Dichloropropane and Dimethyl Carbonate

2007 ◽  
Vol 37 (1) ◽  
pp. 135-136
Author(s):  
Manuel Ángel Iglesias-Otero ◽  
Jacobo Troncoso ◽  
Enrique Carballo ◽  
Luis Romaní
Keyword(s):  
Refractive Index ◽  
Ionic Liquid ◽  
Binary Systems ◽  
Dimethyl Carbonate
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