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  • Title: Terahertz (far-infrared) characterization of tris(hydroxymethyl)aminomethane using high-resolution waveguide THz-TDS.
    Author: Harsha SS, Grischkowsky D.
    Journal: J Phys Chem A; 2010 Mar 18; 114(10):3489-94. PubMed ID: 20163163.
    Abstract:
    Waveguide THz-TDS using metal parallel plate waveguides is employed to obtain a high-resolution terahertz vibrational spectrum of tris(hydroxymethyl)aminomethane, commonly known as Tris or THAM, an important biological buffer component, a neuroinhibitor and an organic thermal energy-storing molecule. Dropcast and sublimated thin films are used to characterize the sample. The development (with cooling) of 3 broad resonances seen at room temperature into 12 highly resolved spectral features for the dropcast sample and 11 features for a sublimated sample at 13.6 K is tracked by measuring the temperature dependence of the transmission spectrum. Resonances with fwhm linewidths as narrow as 12 GHz are obtained. These results provide strong constraints on theoretical modeling.
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