نتایج جستجو برای: photochemistry
تعداد نتایج: 3515 فیلتر نتایج به سال:
We report here on the coupling of a gas reactor with a VUV beamline at the SOLEIL synchrotron radiation facility. The reactor may be irradiated window-less with gas pressure up to the atmosphere. The photochemistry is monitored by a mass spectrometer gas analyzer. This set up, termed APSIS for Atmospheric Photochemistry SImulated by Synchrotron, has been used to simulate the atmosphere of Titan...
Two-photon photoemission (2PPE) has been widely used in the study of electronic structure and dynamics of unoccupied electronic states on different types of surfaces and interfaces. Since 2PPE probes electronically excited states, it should be sensitive to surface excited electronic structure changes that accompany surface chemical reactions. Therefore, this method could potentially be used to ...
1. International Photobiology ( I 928-1982) 2. Regional Photobiology Groups in the USA (1962-1 978) (a) Northern California Photobiology and Photochemistry Group (1962-1974) (b) Northeast Photobiology Group (1967-1970) (c) South Central Photobiology Group (1969-1977) (d) Photochemistry Photobiology Group of the Biophysical Society (1970-1978) 3. United States National Committee for Photobiology...
Near-infrared (NIR) light is better suited than ultraviolet (UV) light for biomedical applications because it penetrates deeper into tissue and causes less photodamage to biological systems. The use of NIR light to control biointerfaces has attracted increasing interest. Here, we review NIR photoreactions at interfaces based on upconverting nanoparticles (UCNPs). UCNPs can convert NIR light to ...
Photochemistry has been developed as a powerful tool for organic transformations, such photoredox catalysis, photocycloaddition, and photoisomerization. Traditional photochemistry relies on molecular photosensitizers. Recently in Chem Catalysis, Weiss colleagues applied semiconductor nanoparticles photosensitizers to drive [2 + 2] cycloaddition of aryl-conjugated dienes with high chemo- ...
Adsorption states and photochemistry of methane and deuterated methane on a Pt~111! surface have been investigated by measuring temperature-programmed desorption spectra, x-ray photoelectron spectra, work function changes, and angle-resolved time-of-flight distributions of desorbed species. Methane weakly adsorbed on the Pt~111! surface at 40 K is dissociated to methyl and hydrogen fragments wi...
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