Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
Rotationally resolved infrared spectra of weakly bound Van der Waals methane dimercomplex (CH4)2 have been detected for the first time in the in the R (0) spectral region ofthe triply degenerate bending mode ν4 of methane monomer correlating with j = 1← 0transition of CH4. The dimer complexes were produced in a supersonic jet expansion andthe spectra were recorded by a tunable diode laser (TDL) spectrometer with 40 MHzspectral resolution. Methane dimer lines were confirmed by scanning the desiredwavelength regions with a mixture of 40% methane in Ar and He-Ne separately and thenexclude the CH4-Ar and CH4-Ne complexes reported in the literature. Many dimer linesare observed between 1290 and 1320 cm-1 spectral region, but the lines are found to bemore concentrated after the band center of the fundamental vibrational modeν4 of CH4monomer (1306.25 cm-1). The spectra exhibit well resolved R branch starting at ~1309.5cm-1. The P and Q branches have been predicted and fitted along with R branch based onthe estimated position of these branches in the spectrum.
