By Kirill Khamidovich Zhuravlev, Ph.D. Washington State University May 2004 Chair: M. D. McCluskey Conjugated organic molecules are important components in solid-state optoelectronic devices and laser dyes. Changes in the conformations of these molecules affect the optical emission wavelengths. In order to probe the conformation of conjugated molecules, infrared (IR) spectroscopy was performed ...

We have studied the Fourier Transform Infrared (FT-IR) and the Fourier transform Raman (FT-Raman) spectra of stanozolol and oxandrolone, and we have performed quantum chemical calculations based on the density functional theory (DFT) with a B3LYP/6-31G (d, p) level of theory. The FT-IR and FT-Raman spectra were collected in a solid phase. The consistency between the calculated and experimental ...

Synchrotron radiation-based Fourier transform infrared spectromicroscopy is a newly emerging analytical tool capable of monitoring the biochemistry within an individual living mammalian cell in real time. This unique technique provides infrared (IR) spectra, hence chemical information, with high signal to noise at spatial resolutions as fine as 3-10 microm. Mid-IR photons are too low in energy ...

We present mid-infrared spectra of T Tauri stars in the Taurus star-forming region obtained with the Spitzer Infrared Spectrograph (IRS). For the first time, the 5–36 μm spectra of a large sample of T Tauri stars belonging to the same star-forming region is studied, revealing details of the midinfrared excess due to dust in circumstellar disks. We analyze common features and differences in the ...

We have developed a new scanning-tunneling-microscopy-based spectroscopy technique to characterize infrared (IR) absorption of submonolayers of molecules on conducting crystals. The technique employs a scanning tunneling microscope as a precise detector to measure the expansion of a molecule-decorated crystal that is irradiated by IR light from a tunable laser source. Using this technique, we o...

Fourier transform infrared (FT-IR) spectroscopy is a physico-chemical method based on measurement of vibration of a molecule excited by IR radiation at a specific wavelength range. FT-IR spectra of bacterial cells can be used to analyze their total composition, including proteins, fatty acids, carbohydrates, nucleic acids, and lipopolysacharides. FT-IR techniques coupled with different chemomet...

We present the mid-infrared spectra obtained with the Spitzer IRS for 52 sources, selected as infrared luminous, zk1 candidates in the Extragalactic First Look Survey. The sample selection criteria are f24 mk 0:9 mJy, f (24 m)/ f (8 m)k 3:16, and f (24 m)/ f (0:7 m)k10. Of the 52 spectra, 47 (90%) produced measurable redshifts based solely on the mid-IR spectral features, with 35/47 (74%) at 1:...

The infrared (IR) spectrum of solid C60 exhibits many weak vibrational modes. Symmetry breaking due to C isotopes provides a possible route for optically activating IR-silent vibrational modes. Experimental spectra and a semi-empirical theory on natural abundance and C-enriched single crystals of C60 are presented. By comparing the experimental results with the theoretical results, we exclude t...

Soft X-ray absorption spectroscopy coupled with nano-scale microscopy has been widely used in material science, environmental science, and physical sciences. In this work, the advantages of soft X-ray absorption spectromicroscopy for plant biopolymer research were demonstrated by determining the chemical sensitivity of the technique to identify common plant biopolymers and to map the distributi...

The infrared (IR) and Raman spectra of triphenylene with intensities were calculated using both density functional theory (DFT, B3LYP method) and Moller-Plesset perturbation method of second order (MP2) with ccpVDZ basis set. Spectra were compared with experimentally measured; the agreement between the observed and calculated spectra is good in case of IR spectroscopy, MP2 simulated spectra wer...