The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Membrane photocatalytic systems (MPS) can provide efficient separation of gaseous products in reactions of hydrogen production. In order to decrease permeability and improve products separation, Nafion was loaded on a MPS with the structure Pt/chemically loaded TiO 2 /filtration loaded TiO 2 /PTFE porous membrane/fibrous support. Influence of Nafion and ethanol amounts on MPS permeability,...
The paper deals with surface properties modifications of cryogels based on poly(vinyl alcohol) and cellulose during exposure to several doses of ultraviolet (UV) irradiation. Significant color changes were observed during UV exposure. The cryogels exhibited a fading trend with irradiation dose increase. Structures accumulated instable red chromophores and exhibited a yellowing tendency. The ultraviolet–visible...
The ability of γ-cyclodextrin to form ternary inclusion complexes has been utilized to mediate photo-heterodimerization between cinnamic acids and coumarins in the solid-state. Stabilizing steric and electronic interactions between the alkenes in the inclusion complex appear to be primarily responsible for directing the complexation toward the 1:1:1 hetero-guest pair complex. Photoexcitation of the...
If a molecule is distorted by steric factors or by its environment along a photochemically active coordinate, vertical excitation puts it to a down-slope in the upper state, so that it is accelerated into the same direction. If the photoreaction is barrierless or nearly so, this acceleration can be decisive for selecting one of several possible paths. This principle is used to explain the accordancy...
In this work, the effects of NaYF 4 :Yb 3+ , Tm 3+ (NYT) structure on the near-infrared light (NIR) photocatalysis performance of ZnO were investigated. α-NYT/ZnO nanocomposites (NCs) and β-NYT/ZnO NCs were fabricated by a high temperature decomposition reaction method. The prepared NCs were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV–vis...
The design, synthesis, and sensor activity of a novel highly water-soluble 9,10-dihydro-7H-imidazo[1,2-b]benz[d,e]isoqionolin-7-one derivative are reported. The changes in the photophysical properties of the compound as a function of pH were investigated in 100% aqueous medium. Novel compound manifests ratiometric “off–on–off” pH sensor activity. Due to the two different “off”-states, it is able to...
The fluorescence properties of five monobenzo-BODIPY compounds were measured in nonpolar and polar solvents by UV–vis absorption, steady-state fluorescence and time-correlated single-photon counting methods. These monobenzo-BODIPY dyes emit bright red fluorescence (wavelength >605nm) with high fluorescence quantum yields (Φ f ≥0.60) which are slightly affected by solvent polarity. The fluorescence...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.