Infrared IR and Ultraviolet UV

The famous astronomer WiUiam Herschel discovered infrared light, the invisible heat radiation, in 1800. His method was simple. A blackened thermometer bulb was heated in different regions of light that had been split into colors by a prism. When the bulb was placed in the dark region outside the red radiation it was heated up more than it had been in the red. 

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NMR ( H, 13C), mass spectrometry, infrared (IR), and ultraviolet (UV) were used, especially NMR, in studying the complexation interactions of artemisinins with agents, such as /3-cyclodextrin <2004JPS2076> and micellar dispersions of octanoyl-6-O-ascorbic acid <2002JPS2265>. Furthermore, the structure-activity relationship of solution structures of deoxoartemisinin 10a and carboxypropyldeoxoartemisinin 10b, as antitumor compounds, was studied by H and 13C NMR <2000BBR359>. 

The characteristic H(4)-H(5) H NMR coupling constants of the 3-oxabicyclo[3.2.0]heptane derivatives anti-% (V//,//=1.3 Hz) and ry -51 Jh,h = 5.6 Hz) have been used to establish the structural assignments for these isomers <20060L491>. The structure of the rearranged cembrane derivative ciereszkolide 52 has been elucidated by onedimensional (TD) and 2-D NMR spectra, high-resolution fast atom bombardment mass spectrometry (HRFAB-MS), infrared (IR), and ultraviolet (UV) as well as by single crystal X-ray analysis <2004EJ03909>. 

Head of the Department, Adrien Albert (1907-89), was an international authority on biologically-active acridines, which included the antimalarial substances I had studied earlier, and now he was concerned with the purines and pyrimidines of the nucleic acids and other biochemically-important substances. My role was to extend the physico-chemical methods for studying organic structures and reactions from the electrochemical methods I had used in Oxford to the spectroscopic, using the infrared (IR) and ultraviolet (UV) spectrophotometers newly available commercially. 

Structure determination rests heavily on information derived from mass (MS), nuclear magnetic resonance (NMR), infrared (IR), and ultraviolet (UV) spectra. Experienced chemists can frequently identify structures with no other information, using only 5—10 pg of material. 

Lai et al. [20] investigated reversed micelles of perfluoroheptanoic acid (FHA) in aqueous 1,1,2-trichlorotiifluoroethane (TCFE) by fluorescence, NMR, infrared (IR), and ultraviolet (UV)-Vis spectroscopy. The spectra of three types of fluorescent probes were used a hydrophobic probe (pyrene), a hydrophilic probe... 

Citreoviridin 1, C23H30O6CH3OH, was shown to contain one methoxy group and six double bonds. Permanganate oxidation of this compound in pyridine afiTorded a carboxylic acid (2), which contained one methyl, one methoxy, and one carboxy group. Infrared (ir) and ultraviolet (uv) absorption spectra of 2 indicated that this acid contained an a-pyrone moiety. The substitution on the pyrone ring was evident from the nuclear magnetic resonance (NMR) spectral data. 

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