Coherent Raman Spectra of the ν1Mode of Carbon Suboxide

2005 ◽  
Vol 109 (14) ◽  
pp. 3139-3145 ◽  
Author(s):  
Tony Masiello ◽  
Andrea J. Voorhees ◽  
Mark J. Abel ◽  
Joseph W. Nibler
Keyword(s):  
Raman Spectra ◽  
Carbon Suboxide ◽  
Coherent Raman

Analysis of coherent Raman spectra

1990 ◽  
Vol 7 (5) ◽  
pp. 722 ◽  
Author(s):  
E. M. Vartiainen ◽  
K.-E. Peiponen ◽  
T. Tsuboi
Keyword(s):  
Raman Spectra ◽  
Coherent Raman

Well-Resolved Coherent Raman Spectra from Femtosecond Pulses

2007 ◽  
pp. 386-388 ◽  
Author(s):  
Sukhendu Nath ◽  
Diana C. Urbanek ◽  
Sean J. Kern ◽  
Mark A. Berg
Keyword(s):  
Raman Spectra ◽  
Femtosecond Pulses ◽  
Coherent Raman

Coherent Raman spectra and Raman-enhanced self-focusing in multimode fiber

1989 ◽  
Vol 70 (2) ◽  
pp. 145-150 ◽  
Author(s):  
Guang-Sheng He ◽  
Dun Liu ◽  
Song-Hao Liu
Keyword(s):  
Raman Spectra ◽  
Multimode Fiber ◽  
Self Focusing ◽  
Coherent Raman

Coherent Anti-Stokes–Stokes Raman Cross-Correlation Spectroscopy: Asymmetric Frequency Shifts in Hydrogen-Bonded Pyridine-Water Complexes

2019 ◽  
Vol 73 (9) ◽  
pp. 1099-1106 ◽  
Author(s):  
Gombojav O. Ariunbold ◽  
Bryan Semon ◽  
Supriya Nagpal ◽  
Prakash Adhikari
Keyword(s):  
Hydrogen Bonding ◽  
Raman Spectra ◽  
Probe Pulse ◽  
Deep Understanding ◽  
Spectroscopic Technique ◽  
Correlation Spectroscopy ◽  
Label Free ◽  
Coherent Raman ◽  
Anti Stokes ◽  
Hydrogen Bonded

Hydrogen bonding is a vital molecular interaction for bio-molecular systems, yet deep understanding of its ways of creating various complexes requires extensive empirical testing. A hybrid femtosecond/picosecond coherent Raman spectroscopic technique is applied to study pyridine-water complexes. Both the coherent Stokes and anti-Stokes Raman spectra are recorded simultaneously as the concentration of water in pyridine varied. A 3 ps and 10 cm−1 narrowband probe pulse enables us to observe well-resolved Raman spectra. The hydrogen bonding between pyridine and water forms the complexes that have altered vibrational frequencies. These red and blue shifts were observed to be uneven. This asymmetry was result of the generated background nonlinear optical processes of pyridine-water complexes. This asymmetry tends to disappear as probe pulse further delayed attaining background-free coherent Raman spectra. For better visualization, spectral analyses both traditional two-dimensional correlation spectroscopy and recent second-order correlation functions defined in frequency domain are employed. Recognized as a label-free and background-free technique, the coherent Raman spectroscopy, complemented with a known high-resolution spectroscopic correlation analysis, has potential in studying the hydrogen-bonded pyridine-water complexes. These complexes are of great biological importance both due to the ubiquitous nature of hydrogen bonds and due to the close resemblance to chemical bases in macro-biomolecules.

The Raman and infra-red spectra of carbon suboxide

1954 ◽  
Vol 223 (1153) ◽  
pp. 251-266 ◽  
Keyword(s):  
Raman Spectrum ◽  
Raman Spectra ◽  
Malonic Acid ◽  
Mass Spectra ◽  
Linear Molecule ◽  
Molecular Symmetry ◽  
Carbon Suboxide ◽  
Photoelectric Recording ◽  
Infra Red

The infra-red and Raman spectra of carbon suboxide have been redetermined since earlier data did not permit an unequivocal decision as to the molecular symmetry. The infra-red spectrum of the gas was measured over the range 275 to 4600 cm -1 using a Perkin-Elmer spectrometer. The Raman spectrum of the liquid (at — 90° C) was investigated using a photoelectric recording spectrometer constructed in this laboratory. No trouble was experienced with decomposition of the sample. The purity of the suboxide which was prepared from malonic acid was carefully checked by following changes in the infra-red and mass spectra at various stages of the purification. In this way several bands previously attributed to the suboxide were shown to be due to impurities. Details of a normal co-ordinate treatment are given, and with its aid all the observed bands are given satisfactory assignments on the basis of a linear molecule, symmetry D ∞λ . This necessitates the postulation of one infra-red active fundamental at about 198 cm -1 . Though this lies outside the region investigated here it has recently been observed by O’Loane in the course of investigations on a series of compounds in the far infra-red.

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