Search results for "iTED"
showing 10 items of 2408 documents
Corrigendum: An Unusually Small Singlet-Triplet Gap in a Quinoidal 1,6-Methano[10]annulene Resulting from Baird's 4n π-Electron Triplet Stabilization.
2016
Within the continuum of π-extended quinoidal electronic structures exist molecules that by design can support open-shell diradical structures. The prevailing molecular design criteria for such structures involve proaromatic nature that evolves aromaticity in open-shell diradical resonance structures. A new diradical species built upon a quinoidal methano[10]annulene unit is synthesized and spectroscopically evaluated. The requisite intersystem crossing in the open-shell structure is accompanied by structural reorganization from a contorted Mobius aromatic-like shape in S0 to a more planar shape in the Huckel aromatic-like T1. This stability was attributed to Baird’s Rule which dictates the …
Bright Blue Phosphorescence from Cationic Bis-Cyclometalated Iridium(III) Isocyanide Complexes
2012
We report new bis-cyclometalated cationic indium(III) complexes [((CN)-N-boolean AND)(2)Ir(CN-tert-Bu)(2)](CF3SO3) that have tert-butyl isocyanides as neutral auxiliary ligands and 2-phenylpyridine or 2-(4'-fluoropheny1)-R-pyridines (where R is 4-methoxy, 4-tert-butyl, or 5-trifluoromethyl) as (CN)-N-boolean AND ligands. The complexes are white or pale yellow solids that show irreversible reduction and oxidation processes and have a large electrochemical gap of 3.58-3.83 V. They emit blue or bluegreen phosphorescence in liquid/solid solutions from a cyclometalating-ligand-centered excited state. Their emission spectra show vibronic structure with the highest-energy luminescence peak at 440-…
Isotope shifts and hyperfine structure in the transitions of stable calcium isotopes and calcium-41
1998
Isotope shifts and hyperfine structure in the 4s2 1S0 → 4s4p 1P1 and 4s2 1S0 → 4s4d 1D2 transitions of calcium have been measured with high-precision laser spectroscopy. Calcium atoms in an atomic beam were excited with single-frequency cw dye and titanium sapphire lasers and then photoionized with the 363.8 nm or 514.5 nm line of an argon ion laser. The resulting ions were analyzed and detected with a quadrupole mass spectrometer. Isotope shifts for all stable calcium isotopes and the radionuclide 41Ca have been measured in both transitions. The corresponding field shift and specific mass shift coefficients as well as hyperfine structure constants for the isotopes 41, 43Ca have been derive…
Learning cultural literacy through creative practices in schools cultural and multimodal approaches to meaning-making
2022
Introduction: Cultural Literacy and Creativity -- A Sociocultural Approach to Children’s Visual Creations -- Multimodality: Art as a Meaning-Making Process -- Tolerance, Empathy, and Inclusion -- Living Together -- Social Responsibility -- Belonging and Home -- Cultural Literacy During COVID-19 -- Conclusions: Cultural Literacy in Action -- Index. This open access book discusses how cultural literacy can be taught and learned through creative practices. It approaches cultural literacy as a dialogic social process based on learning and gaining knowledge through emphatic, tolerant, and inclusive interaction. The book focuses on meaning-making in children and young people’s visual and multimod…
MC-United - tīmekļa vietne spēļu projektam
2017
Mājas lapa spēļu projektam “MC-United” tika izstrādāta kvalifikācijas darba ietvaros. Tā paredzēta Minecraft spēļu projektam, un ietver iespēju lietotājiem sekot līdzi projekta jaunumiem, reklamēt savu privāto Minecraft serveri, pavadīt laiku, skatoties video, kurus ievietojuši citi lietotāji, vai vienkārši komunicējot savā starpā forumā vai tērzētavā. Darbs tika izstrādāts, izmantojot Laravel 5.2 ietvaru, un tika veidots HTML, CSS, JavaScript, PHP programmēšanas valodās.
A mass-independent expanded Dunham analysis of aluminum monoxide and aluminum monosulfide
2018
Abstract Pure rotational transitions of 27Al16O, 27Al18O, 27Al32S, and 27Al34S are recorded in the vibrational ground state and singly excited vibrational state using a mm-wavelength supersonic jet spectrometer in combination with a laser ablation source. In total 275 rotational transitions have been assigned. For the first time, mass-independent expanded Dunham analyses are performed using isotopologues of aluminum monoxide and aluminum monosulfide. The breakdown of the Born-Oppenheimer approximation is observed. Based on these mass-independent analyses, frequency positions of pure rotational transitions of the rare radioactive isotopologues 26AlO and 26AlS are predicted with uncertainties…
Reclutamiento y reclutas en la ciudad de Valencia (1717-1762)
2019
This research aims to analyze recruitment by quintas, Spanish word for recruitment levies by lot, in the city of Valencia and the townships included in its jurisdictional area. The analyzed period began in 1717 with the first levie decreted by king Philip V once the War of Spanish Succession was over. Applied this levie in the kingdom of Valencia, this was the first application of levies by lot. The closing year for the reported period up to 1762, whith the last levy made by king Charles III before the establishment of the annual periodicity for the recruitment process. Procedures with which human contingents claimed to the city of Valencia between the mentioned dates were organized and dis…
Geochemical constraints on volatile sources and subsurface conditions at Mount Martin, Mount Mageik, and Trident Volcanoes, Katmai Volcanic Cluster, …
2017
Abstract We use the chemical and isotopic composition of volcanic gases and steam condensate, in situ measurements of plume composition and remote measurements of SO2 flux to constrain volatile sources and characterize subvolcanic conditions at three persistently degassing and seismically active volcanoes within the Katmai Volcanic Cluster (KVC), Alaska: Mount Martin, Mount Mageik and Trident. In situ plume measurements of gas composition were collected at all three volcanoes using MultiGAS instruments to calculate gas ratios (e.g. CO2/H2S, SO2/H2S and H2O/H2S), and remote measurements of SO2 column density were collected from Mount Martin and Mount Mageik by ultraviolet spectrometer system…
Reversible switching of the Au(111) work function by near infrared irradiation with a bistable SAM based on a radical donor–acceptor dyad
2019
We describe the modification of the work function (WF) of Au(111) upon deposition of self-assembled monolayers (SAMs) with two donor–acceptor (D–A) systems, one based on a ferrocene-polychlorotriphenylmethyl radical (Fc–PTM) dyad and another on its non-radical dyad analogue. Kelvin Probe Force Microscopy (KPFM) has been used to measure the changes in the Contact Potential Difference (CPD) between the tip and the SAM under application of a cycling sweep of direct current (DC) voltage bias. These measurements showed that both SAMs exhibit a hysteretic behaviour in their WF changes. Interestingly, the hysteresis loop of the radical SAM is notably reduced when irradiated with NIR light, which w…
Stereodifferentiation in the formation and decay of the encounter complex in bimolecular electron transfer with photoactivated acceptors.
2005
Experimental evidence has been obtained for the involvement of encounter complexes between both enantiomers of a π,π* triplet excited ketone and a chiral phenol or indole. Determination of the pre-equilibrium constants (KEC) and the intrinsic decay rate constants (kd) indicates a significant stereodifferentiation in both steps of the quenching process. Perez Prieto, Julia, Julia.Perez@uv.es ; Galian, Raquel Eugenia, Raquel.Galian@uv.es ; Morant Miñana, Maria Carmen, Maica.Morant@uv.es