Fourier transform spectroscopy

About: Fourier transform spectroscopy is a research topic. Over the lifetime, 5418 publications have been published within this topic receiving 134133 citations.

The ground electronic state of KCs studied by Fourier transform spectroscopy.

Abstract: We present here the first analysis of laser induced fluorescence (LIF) of the KCs molecule obtaining highly accurate data and perform a direct potential construction for the XΣ+1 ground state in a wide range of internuclear distances KCs molecules were produced by heating a mixture of K and Cs metals in a heat pipe at a temperature of about 270°C KCs fluorescence was induced by different laser sources: the 4545, 4579, 4658, and 4727nm lines of an Ar+ laser, a dye laser with Rhodamine 6G dye (excitation at around 16870cm−1), and 850 and 980nm diode lasers (11 500–11 900 and 10200–10450cm−1 tuning ranges, respectively) The LIF to the ground state was recorded by a Bruker IFS-125HR Fourier transform spectrometer with a spectral resolution of 003cm−1 Particularly, by applying the 850nm laser diode we were able to observe LIF progressions to very high vibrational levels of the ground state close to the dissociation limit The present data field contains 7226 term values for the ground state XΣ+1 and c

Complex refractive index spectra of whole blood and aqueous solutions of anticoagulants, analgesics and buffers in the mid-infrared.

Abstract: Mid-infrared (MIR) spectroscopy is a powerful tool for characterising the vibrations of molecular bonds and is therefore ideal for label-free detection of chemical species. Recent research into thin-film deposition and etching techniques for mid-infrared materials shows potential for realising miniaturised bedside biosensors for clinical diagnostics exploiting MIR spectroscopy, to replace laboratory based-techniques. However, lack of refractive index information for commonly encountered biological media and analytes hampers optimisation of biosensor performance for maximum sensitivity, especially for devices exploiting evanescent spectroscopy. Here we present refractive index data for human whole blood and several aqueous solutions of general interest to the clinical community: anticoagulants, analgesics and buffers. The refractive indices are generally dominated by the water content of each sample and the whole blood spectra exhibit additional strong features due to protein content. Furthermore, we present a generalised method for extracting complex refractive indices of aqueous solutions in the mid-infrared region using conventional attenuated total reflection Fourier transform spectroscopy (ATR-FTIR) without the need for collimated or polarised incident light, as is required for existing methods.