C–H vibrational states of benzene, naphthalene, and anthracene in the visible region by thermal lensing spectroscopy and the local mode model

1976 ◽  
Vol 65 (1) ◽  
pp. 179-190 ◽  
Author(s):  
Robert L. Swofford ◽  
M. E. Long ◽  
A. C. Albrecht
Keyword(s):  
Visible Region ◽  
Thermal Lensing ◽  
Local Mode ◽  
Vibrational States

C–H vibrational states of C6D5H and C6F5H in the visible region by thermal lensing spectroscopy. A test of the local mode model

1977 ◽  
Vol 66 (11) ◽  
pp. 5245-5246 ◽  
Author(s):  
Robert L. Swofford ◽  
Mitchell S. Burberry ◽  
James A. Morrell ◽  
A. C. Albrecht
Keyword(s):  
Visible Region ◽  
Thermal Lensing ◽  
Local Mode ◽  
Vibrational States

High resolution spectra of GeH4v=6 and 7 stretch overtones. The perturbed local mode vibrational states

1993 ◽  
Vol 99 (4) ◽  
pp. 2359-2364 ◽  
Author(s):  
Qing‐Shi Zhu ◽  
A. Campargue ◽  
J. Vetterhöffer ◽  
D. Permogorov ◽  
F. Stoeckel
Keyword(s):  
High Resolution ◽  
Local Mode ◽  
Vibrational States

scholarly journals Local mode interpretation of the OH overtone spectrum of 1:1 phyllosilicates

2021 ◽  
Vol 33 (2) ◽  
pp. 209-220
Author(s):  
Etienne Balan ◽  
Emmanuel Fritsch ◽  
Farid Juillot ◽  
Thierry Allard ◽  
Sabine Petit
Keyword(s):  
Near Infrared ◽  
Divalent Cations ◽  
Local Mode ◽  
Transition Elements ◽  
Vibrational States ◽  
Oh Groups ◽  
Mechanical Approach ◽  
Mir Spectra ◽  
Quantum Mechanical Approach ◽  
Theoretical Results

Abstract. Although OH overtone bands of 1:1 phyllosilicates are commonly observed in their near-infrared (NIR) spectra, their interpretation in terms of transitions between specific vibrational states is still uncertain. This situation can be traced back to the coupled nature of the fundamental OH-stretching modes involving the interlayer OH groups of 1:1 phyllosilicates. In this case, the overtone spectra cannot be directly related to their fundamental counterparts observed in the mid-infrared (MIR) spectra. In the present study, we use a parameterized quantum-mechanical approach to compute the vibrational frequencies related to the fundamental and overtone bands in serpentine group and kaolinite group minerals. The simple model is based on a description of the vibrational properties of a cluster of OH groups in terms of harmonically coupled anharmonic oscillators. The comparison of the theoretical results with experimental observations makes it possible to interpret most of the salient features of the overtone spectrum of 1:1 phyllosilicates. Unlike the bands observed in the MIR spectra, the overtone bands observed between 7000 and 7300 cm−1 are related to local transitions from the ground state to the second excitation level of OH groups, whereas the weaker bands observed between 7300 and 7400 cm−1 involve a double excitation to the first vibrational level of OH oscillators. The results also support the assignment of specific overtone bands to the occurrence of substituted divalent cations of transition elements in serpentine group minerals.

’’Free’’ O–H overtone absorption of methanols in the visible region by thermal lensing spectroscopy

1977 ◽  
Vol 66 (2) ◽  
pp. 664-668 ◽  
Author(s):  
Robert L. Swofford ◽  
M. E. Long ◽  
M. S. Burberry ◽  
A. C. Albrecht
Keyword(s):  
Visible Region ◽  
Thermal Lensing
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