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.
Near-infrared (NIR) quantum cutting involving the down-conversion of an absorbed visible photon to emission of two NIR photons was demonstrated in Y 3 Al 5 O 12 (YAG):0.01Ce 3+ , xNd 3+ (x=0, 1, 2, 5, 10, 15mol%) samples. The photoluminescence properties of samples in visible and NIR regions were investigated to verify the energy transfer (ET) from Ce 3+...
In this paper, a novel bis-Schiff base fluorescent probe (HL) for Al 3+ has been designed and synthesized on the basis of the mechanism of internal charge transfer (ICT). Compared with the free receptor, the fluorescence intensity of HL shows significant fluorescence enhancement accompany with about 40nm blue shift in the presence of Al 3+ . More importantly, the lowest detection limit...
The optical limiting performance of indium phthalocyanine-based polymer thin-films with large nonlinear absorption coefficients (β eff ) and low limiting threshold intensity (I lim ) are described. The absorption cross-sections and the population dynamics of the excited states are also reported. The excited state absorption cross-sections (σ exc ) are shown to depend on the...
Two novel isomeric photochromic naphthopyrans (1 and 2) containing naphthalimide moieties were prepared and studied. In the compound 1, O-atom of pyran cycle is at C-3 position of naphthalene ring, whereas, in compound 2, O-atom of pyran cycle is at C-4 position. In the compound 2 due to para-position O-atom of pyran photochrome cycle is involved into the conjugated naphthalimide system. The variety...
A class of novel carbazole sensitizers was synthesized with carbazole derivatives as the electron donor, 4-phenyl-2-(thiophen-2-yl) thiazole as π-bridge and cyanoacetic acid as the electron acceptor. Their absorption spectra, photovoltaic performance and electrochemical properties were evaluated. These carbazole sensitizers share the same π-bridge and electron acceptor and display the similar absorption...
Nanocrystalline fluorinated titania has been prepared using microwave-assisted hydrothermal crystallization of hydrous titania in a NH 4 F aqueous solution. Thus, obtained TiO 2 has exhibited excellent photocatalytic activity in the reaction of crystal violet dye photodegradation – up to twofold higher than the photocatalytic activity of the commercial Evonik Aeroxide ® TiO...
A novel photochromic diarylethene with a 1,8-naphthalimide-rhodamine B unit has been synthesized and its photochemical properties were systematically studied. The diarylethene can effectively respond to the stimuli of light, proton, and specific metal ions. When triggered by Cr 3+ , strong fluorescence was observed at 603nm due to the opening of the rhodamine B moiety, accompanied with a color...
Fluorescence behavior and intramolecular charge transfer (ICT) property of N,N′-dimethylamino substituted anil derivative of coumarinyl amine was studied by steady state and time-resolved fluorescence spectroscopy in combination with density functional theory calculation. Quantitative analysis of the effect of solvent hydrogen bonding on several spectral parameters was done using multiple regression...
The synthesis of silicon compounds is usually performed by vulcanization at high temperatures in the presence of a platinum catalyst. The activation can also be achieved by UV light irradiation. When a suitable sensitizer is added to the formulation, the reaction can be triggered by lower wavelengths (in the visible spectra). In this way, both energy saving and greater safety are carried out. In the...
This study evaluates the use of the Fe(III)-EDDS complexing agent as an alternative to conventional acidic pH photo-Fenton for the treatment of the pesticide imidacloprid in natural water. The main objective is to estimate whether Fe(III)-EDDS is a viable alternative when treating waters containing high concentrations of contaminants. To this end, the mode of action of Fe(III)-EDDS is examined in...
WO 3 and BiVO 4 attract widely research interests for their ability to oxidize water and generate O 2 by visible light. In order to clarify the photocatalytic oxidation mechanism, OH radical (OH) generation in the photocatalytic reactions was investigated by a fluorescence probe method under 470nm LED irradiation using coumarin and coumarin-3-carboxylic acid as fluorescence...
The photocatalytic deposition of antimony(III) sulfide on the surface of TiO 2 films on the conductive FTO glass was investigated. The photoprocess yields particles of amorphous and almost stoichiometric Sb 2 S 3 with a size of 150–300nm and spherical micrometer particles enriched with Sb with a Sb:S ratio that decreases gradually from 13:1 in the particle center to 5:1 at...
Cationic photopolymerization studies of poly(propylene glycol)diglycidyl ether with and without 25wt% of resorcinol diglycidyl ether were carried out in presence of bis(4-methylphenyl)iodonium hexafluorophosphate as photoinitiator. Analyses were carried out using polychromatic radiation at different temperatures in a photo differential scanning calorimeter. The formulations showed an enhancement in...
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.