Journal ArticleDOI
Infrared and Ultraviolet Spectra of the Products of the Vacuum‐Ultraviolet Photolysis of Silane Isolated in an Argon Matrix
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TLDR
In this paper, a previously unobserved transition of Si2, tentatively identified as the D(3Πu)−X(3 Σg−) transition, is reported.Abstract:
The vacuum‐ultraviolet photolysis of silane and of the various deuterosilanes isolated in an argon matrix at 4 or at 14°K leads to the production of several reactive species. Infrared and ultraviolet spectroscopic evidence is presented indicating that Si2, SiH, SiH2 and SiH3 are stabilized in these experiments. A previously unobserved transition of Si2, tentatively identified as the D(3Πu) − X(3Σg−) transition, is reported. Observation of the bending vibration absorption of SiH2 at 1008 cm−1 has confirmed that the lower state of the previously observed electronic transition of singlet SiH2 is the ground state of this species. The stretching vibrations of SiH2 have also been observed near 2000 cm−1. Infrared absorptions at 925, 996, 1955, and 1999 cm−1 have been tentatively assigned to SiH3. The removal of one or more H atoms from SiH4 leads to an appreciable lengthening of the remaining Si–H bonds. Disilane and incompletely characterized products of its photolysis contribute significantly to the infrared ...read more
Citations
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Journal ArticleDOI
The Vibrational Energy Levels of Small Transient Molecules Isolated in Neon and Argon Matrices
TL;DR: In this article, the ground-state vibrational fundamental frequencies of diatomic and small polyatomic free radicals, molecular ions, and other short-lived molecules upon trapping in neon and argon matrices are reviewed, with extensive documentation.
Journal ArticleDOI
Geometrical structures, force constants, and vibrational spectra of SiH, SiH2, SiH3, and SiH4
TL;DR: In this paper, a comprehensive theoretical examination of the re and r0 geometrical structures, harmonic and anharmonic vibrational frequencies, and infrared intensities of X2Π SiH, X 1A1, a 3B1, and A1B1 SiH2, X2A1 siH3, and X1A1SiH4 are presented.
Journal ArticleDOI
Theoretical prediction of the potential curves for the lowest‐lying states of the isovalent diatomics CN+, Si2, SiC, CP+, and SiN+ using the abinitio MRD‐CI method
TL;DR: In this paper, the potential curves of the isovalent series of diatomic systems CN+, Si2, SiC, CP+, and SiN+ in their lowest electronic states are reported.
Journal ArticleDOI
Optical absorption of matrix isolated Li, Na, and Ag clusters and microcrystals
T. Welker,T. P. Martin +1 more
TL;DR: In this paper, optical absorption spectra were reported for Li, Na, and Ag in various stages of aggregation ranging from atom to microcrystal, and it was shown that the trimers are triangular and the four atom clusters have tetrahedral shape.
Journal ArticleDOI
High resolution absorption and emission spectroscopy of a silane plasma in the 1800–2300 cm−1 range
TL;DR: In this article, high resolution infrared absorption and emission spectra have been obtained from an electrical discharge in silane, in addition to extracting vibrational and rotational temperatures for silane itself and emission from the ground electronic state of the free radical SiH.
References
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Book
Molecular Spectra and Molecular Structure: I. Spectra of Diatomic Molecules
Gerhard Herzberg,S. Mrozowski +1 more
Journal ArticleDOI
The Preparation and Some Properties of Hydrides of Elements of the Fourth Group of the Periodic System and of their Organic Derivatives
Journal ArticleDOI
Infrared and Ultraviolet Spectroscopic Study of the Products of the Vacuum‐Ultraviolet Photolysis of Methane in Ar and N2 Matrices. The Infrared Spectrum of the Free Radical CH3
TL;DR: In this article, it was shown that CH3 may rotate in an argon matrix, and an appreciable concentration of CH2N2 appears in the N2 matrix experiments.
Journal ArticleDOI
Matrix‐Isolation Study of the Infrared and Ultraviolet Spectra of the Free Radical HCO. The Hydrocarbon Flame Bands
TL;DR: In this paper, a tentative assignment for the hydrocarbon flame bands has been proposed which is in reasonable agreement with the observed band structure of the emission system, in contrast to the results of previous studies.