Intermolecular distances of carboxylated TEMPO derivatives on TiO2 evaluated by spin-probe ESR.
نویسندگان
چکیده
Nearest-neighbor intermolecular distances of molecules adsorbed on the surface of nanocrystalline TiO(2) particles were evaluated by the electron spin resonance (ESR) technique with molecules having a nitroxide radical and a carboxyl group as a spin probe to clarify their aggregation behaviors on TiO(2) and the influence of coadsorbates.
منابع مشابه
Spectroscopic investigation of the mechanism of photocatalysis.
Reaction mechanisms of various kinds of photocatalysts have been reviewed based on the recent reports, in which various spectroscopic techniques including luminol chemiluminescence photometry, fluorescence probe method, electron spin resonance (ESR), and nuclear magnetic resonance (NMR) spectroscopy were applied. The reaction mechanisms elucidated for bare and modified TiO2 were described indiv...
متن کاملFifth Anniversary of ACERT
EPR newsletter 2007 vol.16 no.4 | 11 pelling reasons to invest in the development of modern ESR methods for applications in biophysical and biomedical research. The potential of ESR may best be evaluated by considering (1) its absolute sensitivity, (2) its spectral resolution, (3) its sensitivity to different types of molecular motion, including translation, rotation, and intermolecular relativ...
متن کاملESR study of the liposome membrane physical parameters in the heating-cooling cycles.
Changes of dynamic and structural parameters of egg yolk lecithin (EYL) liposome membranes in the heating-cooling cycles have been studied using the ESR spin probe method. The investigations were conducted in the range of temperatures from -18 degrees C to +60 degrees C. It has been found that in the range of temperatures -15 degrees C to +45 degrees C in both the heating and the cooling run th...
متن کاملA multifrequency electron spin resonance study of T4 lysozyme dynamics.
Electron spin resonance (ESR) spectroscopy at 250 GHz and 9 GHz is utilized to study the dynamics and local structural ordering of a nitroxide-labeled enzyme, T4 lysozyme (EC 3.2.1.17), in aqueous solution from 10 degrees C to 35 degrees C. Two separate derivatives, labeled at sites 44 and 69, were analyzed. The 250-GHz ESR spectra are well described by a microscopic ordering with macroscopic d...
متن کاملEffect of oxygen on the electrochemical reduction of nitroxyl radical: interpretation of the mechanism for a redox probe in biological systems.
Though this reaction has been widely employed as a redox probe in biological systems,1–4 we have a question as to why the reduced form of the nitroxyl radicals effectively works as a redox probe for oxidative stress in vivo regardless of their slow oxidation at electrodes, and their irreversible electrochemical property.5–7 We cannot help commenting that its reaction mechanism has been sufficie...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical chemistry chemical physics : PCCP
دوره 14 46 شماره
صفحات -
تاریخ انتشار 2012