نتایج جستجو برای: ir spectroscopy

تعداد نتایج: 230332  

2016
Geeta Verma

Infrared (IR) spectroscopy is an old analytical technique that has been widely utilized as a routine tool by the fats and oils industry . The measurement of physicochemical properties by FT-IR spectroscopy, not only provide the benefit of rapid analysis but also avoid dangers associated with reagents used in the traditional chemical method. Mid IR spectra have been used to characterize edible o...

Journal: :Dalton transactions 2013
Dennis Awasabisah Nan Xu Krishna P Sharmah Gautam Douglas R Powell Michael J Shaw George B Richter-Addo

The six-coordinate compounds, (T(p-OMe)PP)Ru(NO)(OC6HF4) and (T(p-OMe)PP)Ru(NO)(OC(=O)CF3) have been prepared and characterized by IR and NMR spectroscopy, electrochemistry and IR spectroelectrochemistry, and by X-ray crystallography. These compounds undergo macrocycle-centered oxidations, and loss of axial ligands upon reduction.

1999
R. Maiolino N. Thatte A. Alonso - Herrero D. Lutz A. Marconi

We present multi-wavelength imaging observations of three nearby and famous active galaxies obtained with NICMOS, ISOCAM and the MPE near-IR integral field spectrometer. The data reveal a variety of features and properties that are missed in optical studies and in traditional IR monodimensional spectroscopy.

1998
Roland Servaty Jürgen Schiller Hans Binder Bernd Kohlstrunk Klaus Arnold

Although it has been recently shown by the use of H nuclear magnetic resonance (H NMR) spectroscopy that enzymatically formed hypochlorous acid (HOCl/Cl) reacts with carbohydrates containing N-acetyl groups under the formation of acetate and presumably chloramines, mechanistical aspects of this reaction remain unknown. Since NMR spectroscopy suffers a lot from low sensitivity especially toward ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Wei Xiong Jennifer E Laaser Randy D Mehlenbacher Martin T Zanni

In the last ten years, two-dimensional infrared spectroscopy has become an important technique for studying molecular structures and dynamics. We report the implementation of heterodyne detected two-dimensional sum-frequency generation (HD 2D SFG) spectroscopy, which is the analog of 2D infrared (2D IR) spectroscopy, but is selective to noncentrosymmetric systems such as interfaces. We implemen...

Journal: :The Analyst 2011
Carla S Riccardi Dennis W Hess Boris Mizaikoff

This communication presents a novel label-free biosensing method to monitor DNA hybridization via infrared attenuated total reflection (IR-ATR) spectroscopy using surface-modified ZnSe waveguides. Well-defined carboxyl-terminated monolayers were formed at H-terminated ZnSe by direct photochemical activation. Chemical activation of the acidic function was obtained by using succinimide/carbodiimi...

2016
Robert Szczęsny Edward Szłyk Marek A. Wiśniewski Tuan K. A. Hoang Duncan H. Gregory

The simple fluorinated precursor, copper(II) trifluoroacetate, Cu(CF3COO)2 can be effectively utilised in the synthesis of copper(I) nitride, Cu3N, powders and films by combinations of wet processing and gas–solid (ammonolysis) techniques. The resulting materials were characterized by powder X-ray diffraction (PXD), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (E...

2014
Curtis Marcott Michael Lo Qichi Hu Kevin Kjoller Craig B. Prater

The performance of many materials depends on their surface properties, composition, uniformity, and topography. Since the presence of small defects can have a dramatic effect on the ultimate properties of a material, it is important to have analytical tools capable of analyzing such defects and understanding their chemical makeup. Infrared (IR) spectroscopy is a powerful tool for obtaining chem...

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