Results 1 to 10 of about 21,954 (210)

Synthesis and Photophysics of 5-(1-Pyrenyl)-1,2-Azoles

open access: yesChemistry
Two pyrene derivatives, substituted at position 1 with isoxazole or NH-pyrazole, were synthesized in 85–87% yield starting from 1-acetylpyrene and via the cyclocondensation reaction of a β-enaminone intermediate with hydroxylamine or hydrazine.
María-Camila Ríos   +2 more
doaj   +2 more sources

Advantages of the Surface Structuration of KBr Materials for Spectrometry and Sensors

open access: yesSensors, 2018
A potassium bromide (KBr) material, which has been widely used as the key element in Fourier spectrometers and as the output window of the IR-lasers, was studied via applying carbon nanotubes in order to modify the potassium bromide surface.
Natalia Vladimirovna Kamanina   +2 more
doaj   +1 more source

Interaction of astigmatic hyperbolic sinusoidal Gaussian beams in strongly nonlocal nonlinear media

open access: yesResults in Physics
In this paper, we obtain analytical expressions for the co-propagation of two and four interacting astigmatic hyperbolic sinusoidal Gaussian beams in strongly nonlocal nonlinear media by using nonlocal nonlinear Schrödinger equation.
Rui Bian   +4 more
doaj   +1 more source

Cluster-based DFT modeling of Raman vibrations in tetrahedral GeS2 and GeSe2 amorphous chalcogenides

open access: yesScientific Reports
The local atomic structure of amorphous chalcogenides remains a decisive factor governing their physical behavior. However, in thin films, structural complexity and high defect concentrations make interpretation of experimental data—particularly Raman ...
Tomáš Halenkovič   +2 more
doaj   +1 more source

Photophysics of BODIPY Dyes as Readily-Designable Photosensitisers in Light-Driven Proton Reduction

open access: yesInorganics, 2017
A series of boron dipyrromethene (BODIPY) dyes was tested as photosensitisers for light-driven hydrogen evolution in combination with the complex [Pd(PPh3)Cl2]2 as a source for catalytically-active Pd nanoparticles and triethylamine as a sacrificial ...
Laura Dura   +8 more
doaj   +1 more source

Towards Water Soluble Mitochondria-Targeting Theranostic Osmium(II) Triazole-Based Complexes

open access: yesMolecules, 2016
The complex [Os(btzpy)2][PF6]2 (1, btzpy = 2,6-bis(1-phenyl-1,2,3-triazol-4-yl)pyridine) has been prepared and characterised. Complex 1 exhibits phosphorescence (λem = 595 nm, τ = 937 ns, φem = 9.3% in degassed acetonitrile) in contrast to its known ...
Salem A. E. Omar   +5 more
doaj   +1 more source

NHC-Based Iron Sensitizers for DSSCs

open access: yesInorganics, 2018
Nanostructured dye-sensitized solar cells (DSSCs) are promising photovoltaic devices because of their low cost and transparency. Ruthenium polypyridine complexes have long been considered as lead sensitizers for DSSCs, allowing them to reach up to 11 ...
Thibaut Duchanois   +13 more
doaj   +1 more source

Isospin-breaking contribution to the model-independent axion-photon-photon coupling in U(3) chiral theory

open access: yesEuropean Physical Journal C: Particles and Fields
We pursue the calculation of the model-independent component of the axion-photon-photon coupling in the U(3) chiral perturbation theory up to next-to-leading order, with the emphasis on the isospin breaking effect.
Rui Gao   +5 more
doaj   +1 more source

Combined Experimental and Theoretical Investigation into the Photophysical Properties of Halogenated Coelenteramide Analogs

open access: yesMolecules, 2022
Marine Coelenterazine is one of the most well-known chemi-/bioluminescent systems, and in which reaction the chemi-/bioluminophore (Coelenteramide) is generated and chemiexcited to singlet excited states (leading to light emission).
Ana Carolina P. Afonso   +3 more
doaj   +1 more source

Chemical Tuning and Absorption Properties of Iridium Photosensitizers for Photocatalytic Applications

open access: yesInorganics, 2017
Cyclometalated Ir(III) complexes are of particular interest due to the wide tunability of their electronic structure via variation of their ligands. Here, a series of heteroleptic Ir-based photosensitizers with the general formula [Ir(C^N)2(N^N)]+ has ...
Olga S. Bokareva   +5 more
doaj   +1 more source

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