Achieving host-free near-ultraviolet electroluminescence via electronic state engineering with phosphine oxide

2022 ◽  
Vol 429 ◽  
pp. 132327
Author(s):  
Shuo Chen ◽  
Chunying Zhang ◽  
Hui Xu
Keyword(s):  
Electronic State ◽  
Phosphine Oxide ◽  
Near Ultraviolet

A dark, excited electronic state of thiophosgene in the near ultraviolet

1992 ◽  
Vol 165 (1) ◽  
pp. 101-112 ◽  
Author(s):  
A. Maciejewski ◽  
M. Szymanski ◽  
R.P. Steer
Keyword(s):  
Electronic State ◽  
Excited Electronic State ◽  
Near Ultraviolet

scholarly journals Sunlight initiated atmospheric photochemical reactions

2005 ◽  
Vol 7 (2) ◽  
pp. 61-70 ◽  
Author(s):  
V. Vaida
Keyword(s):  
Electronic State ◽  
Light Source ◽  
Chemical Reactions ◽  
Atmospheric Chemistry ◽  
Near Infrared ◽  
Photochemical Reactions ◽  
Ground Electronic State ◽  
Photon Flux ◽  
The Sun ◽  
Near Ultraviolet

The Sun is the light source driving atmospheric chemistry. The wavelengths dependent photon flux is controlled by solar emission modulated by absorption of atmospheric gases, aerosols and clouds. The factors determining the characteristics of this light source, its altitude, latitude and zenith angle dependence are discussed to explain the effectiveness of the Sun in driving chemical reactions. Examples of chemical reactions occurring on the excited and the ground electronic state potential energy surfaces of molecules and radicals are used to illustrate the complexity of atmospheric photochemistry. Specifically, the near ultraviolet (UV) photochemistry of chlorine dioxide is used to exemplify electronic state reactions occurring in the atmosphere. The near infrared (IR) photochemistry of nitric and sulfuric acids are discussed to illustrate reactions important in the atmosphere which occur with solar pumping of vibrational overtone transitions in the ground electronic state of these molecules.

SOME RESULTS OF THE HIGH DISPERSION ELECTRONIC EMISSION SPECTRUM OF FORMALDEHYDE

1956 ◽  
Vol 34 (7) ◽  
pp. 699-710 ◽  
Author(s):  
G. Wilse Robinson
Keyword(s):  
Emission Spectrum ◽  
Electronic State ◽  
Equilibrium Configuration ◽  
Excited Electronic State ◽  
High Dispersion ◽  
Ultraviolet Region ◽  
Vibrational Assignment ◽  
Absorption Study ◽  
Near Ultraviolet ◽  
Experimental Findings

It has been possible to obtain the emission spectrum in the near ultraviolet region of formaldehyde in a discharge tube at sufficiently high resolution and purity so that the rotational structure can be studied. Some preliminary results of the analysis are discussed, especially with regard to the vibrational assignment of the emission and absorption systems and to the nature of the upper electronic state. An examination of the data rather strongly indicates a non-planar equilibrium configuration in the excited electronic state. Some of the previous interpretations are shown to be in disagreement with the experimental findings. A long path length absorption study of the gas revealed a number of new bands, some of which may belong to a second electronic transition.

E-Market of State Purchases in Russia

2005 ◽  
pp. 121-130 ◽  
Author(s):  
V. Ryabtsun
Keyword(s):  
Electronic State ◽  
Legal Basis ◽  
Siberian Region ◽  
Federal Target Program ◽  
Target Program

Legal basis and development of systems of electronic state purchases in Russia with special attention to the federal target program "Electronic Russia (2002-2010)" are considered in the article. The level of development of such systems is examined within the case of their functioning in the Ural-Siberian region. The results of the work of state purchases e-market in Novosibirsk and Chelyabinsk are presented.

A Solvent Free Synthetic Route for Cerium(IV) Metal-Organic Frame-works with UiO-66 Architecture and Their Photocatalytic Application

2019 ◽  
Author(s):  
Matteo Campanelli ◽  
Tiziana Del Giacco ◽  
Filippo De Angelis ◽  
Edoardo Mosconi ◽  
Marco Taddei ◽  
...  
Keyword(s):  
Density Functional ◽  
Chemical Oxidation ◽  
Solvent Free ◽  
Cerium Ammonium Nitrate ◽  
Benzylic Alcohols ◽  
Near Ultraviolet ◽  
Photocatalytic Application ◽  
Activity Density ◽  
Ultraviolet Light Irradiation ◽  
Metal Organic

<div> <p>A novel solvent-free synthesis for Ce-UiO-66 metal-organic frameworks (MOFs) is presented. The MOFs are obtained by simply grinding the reagents, cerium ammonium nitrate (CAN) and the carboxylic linkers, in a mortar for few minutes with the addition of a small amount of acetic acid (AcOH) as modulator (1.75 eq, o.1 ml). The slurry is then transferred into a 1 ml vial and heated at 120°C for 1 day. The MOFs have been characterized for their composition, crystallinity and porosity and employed as heterogenous catalysts for the photo-oxidation reaction of substituted benzylic alcohols to benzaldaldehydes under near ultraviolet light irradiation. The catalytic performances, such as yield, conversion and kinetics, exceed those of similar systems studied by chemical oxidation and using Ce-MOF as catalyst. Moreover, the MOFs were found to be reusable up to three cycles without loss of activity. Density functional theory (DFT) calculations gave an estimation of the band-gap shift due to the different nature of the linkers used and provide useful information on the catalytic activity experimentally observed.</p> </div>

An Infrared Microscope for Use on a Focused Ion Beam for Circuit Edit and Backside Edit Applications

2015 ◽  
Author(s):  
Alexander Richards ◽  
Matthew Weschler ◽  
Michael Durller
Keyword(s):  
Focused Ion Beam ◽  
Near Infrared ◽  
Ion Beam ◽  
Visible Spectrum ◽  
Camera System ◽  
Buried Structures ◽  
Ir Camera ◽  
Area Of Interest ◽  
Near Ultraviolet ◽  
Infrared Microscope

Abstract To help solve the navigational problem, i.e., being able to successfully locate a circuit for probing or editing without destroying chip functionality, a near-infrared (NIR), near-ultraviolet (NUV), and visible spectrum camera system was developed that attaches to most focused ion beam (FIB) or scanning electron microscope vacuum chambers. This paper reviews the details of the design and implementation of the NIR/NUV camera system, as instantiated upon the FEI FIB 200, with a particular focus on its use for the visualization of buried structures, and also for non-destructive real time area of interest location and end point detection. It specifically considers the use of the micro-optical camera system for its benefit in assisting with frontside and backside circuit edit, as well as other typical FIB milling activities. The quality of the image obtained by the IR camera rivals or exceeds traditional optical based imaging microscopy techniques.

Variational Method for Estimating the Dipole Moment in the Second Excited State of Fluorescein Molecule from its Electronic UV Absorption Spectra

2019 ◽  
Vol 70 (10) ◽  
pp. 3538-3544
Author(s):  
Alina Costina Luca ◽  
Ana Cezarina Morosanu ◽  
Irina Macovei ◽  
Dan Gheorghe Dimitriu ◽  
Dana Ortansa Dorohoi ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Excited State ◽  
Variational Method ◽  
Electronic State ◽  
Excited Electronic State ◽  
Spectral Band ◽  
Uv Absorption ◽  
Optical Parameters ◽  
Electrical Permittivity ◽  
Fluorescein Molecule

Electro-optical parameters of fluorescein molecule in the second excited electronic state and information on the interactions with solvents were obtained from a solvatochromic study. Parameters of the solvents such as the refractive index, electrical permittivity and Kamlet-Taft parameters (hydrogen bond acidity and basicity) were related with the experimentally recorded shifts of UV absorption spectral band of fluorescein dissolved in several solvents. Through a variational method, the electric dipole moment and polarizability in excited state of fluorescein molecule were estimated. The calculus requires some parameters of the fluorescein molecule in the ground electronic state, which were determined through a quantum-mechanical study.

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