Multiply charged ions are intruiging species whose reactivity and thermodynamic stability depends on the extent of ligation. The possibility of dissociating to two singly charged ions, which is often highly exothermic, leads to spectroscopy and dissociation dynamics that are qualitatively different from their singly charged counterparts. Various methods of producing multiply charged ions are di...

F. G. Eich,1,2,3,* S. Kurth,4,5,3 C. R. Proetto,2,3,† S. Sharma,1,3 and E. K. U. Gross1,3 1Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany 2Institut für Theoretische Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany 3European Theoretical Spectroscopy Facility (ETSF) 4Nano-Bio Spectroscopy Group, Depto. de Física de Materiales, Universidad d...

Two new 2'-oxygenated flavones, 5,2',6'-trihydroxy-7-methoxyflavone (3) and skullcapflavone I 2'-O-beta-D-(4"-E-cinnamyl) glucopyranoside (5), together with three known flavones, 7-O-methylwogonin (1), skullcapflavone I (2) and skullcapflavone I 2'-O-beta-D-glucopyranoside (4) were isolated from the whole plant of Andrographis elongata, and the structures were elucidated by FAB-MS and one- and ...

B. Reduction in Saddle-Type Coil Size 5 C. Solenoidal Coils and Magic Angle Spinning 5 D. Microcoils 6 E. Microfabrication 7 F. Direct Comparisons of Probe Sensitivity 8 V. Microliter-Volume Static NMR Spectroscopy 9 A. Natural Product Extracts 9 B. Analysis of Combinatorial Chemistry Products 10 VI. Nanoliter-Volume Static NMR Spectroscopy 10 VII. NMR Detection of Capillary Separations 12 A. F...

Two of bioactive natural products were founded in a brown alga, Sargassum fulvellum. After isolation and purification, the molecular structures of these two products were investigated by NMR spectroscopy and GC-mass spectroscopy. The two compounds were identified to be 1-O-palmitoyl-2-O-oleoyl-3-O-(alpha-D-glucopyranosyl)-glycerol (POGG) and 1-O-myristoyl-2-O-oleoyl-3-O-(alpha-D-glucopyranosyl)...

S. Kurth 2, 3 and F. G. Eich 5, 3 Nano-Bio Spectroscopy Group, Dpto. de F́ısica de Materiales, Universidad del Páıs Vasco UPV/EHU, Centro F́ısica de Materiales CSIC-UPV/EHU, Av. Tolosa 72, E-20018 San Sebastián, Spain IKERBASQUE, Basque Foundation for Science, E-48011 Bilbao, Spain European Theoretical Spectroscopy Facility (ETSF) Institut für Theoretische Physik, Freie Universität Berlin, Arnima...

A. Temperature Chambers 1735 B. Pressure Cells 1735 C. Stretching Equipment 1736 D. Fiber Spinning Equipment 1737 E. Fiber Drawing Apparatus 1738 F. Shear Apparatus 1739 IV. Combined Techniques 1739 A. Simultaneous SAXS/WAXD 1739 B. Raman Spectroscopy 1740 C. Laser Light Scattering 1741 D. Fourier Transform IR Spectroscopy 1743 V. Applications 1743 A. Materials-Based Studies 1743 1. Block Copol...

The infrared O–D stretching spectrum of fully deuterated jet-cooled water clusters is reported. Sequential red-shifts in the single donor O–D stretches, which characterize the cooperative effects in the hydrogen bond network, were accurately measured for clusters up to (D2O)8 . Detailed comparisons with corresponding data obtained for (H2O)n clusters are presented. Additionally, rotational anal...

Initially, Raman spectroscopy was a specialized technique used by vibrational spectroscopists; however, due to rapid advancements in instrumentation and imaging techniques over the last few decades, Raman spectrometers are widely available at many institutions, allowing Raman spectroscopy to become a widespread analytical tool in mineralogy and other geological sciences. Hyperspectral imaging, ...

High-resolution gas-phase infrared spectroscopy of buckminsterfullerene (C 60 ) was attempted near 8.5 μmusing cavity ring-down spectroscopy. Solid C 60 was heated in a high-temperature (∼950K) oven and cooled using an argon supersonic expansion generated from a 12.7mm × 150 μm slit.The expected S/N ratio is ∼140 for vibrationally cold C 60 , but no absorption signal has been observed, presumab...