Results 201 to 210 of about 255,693 (225)

Optical switching based on singlet-singlet excited state absorption

Nonlinear Optics: Materials, Fundamentals and Applications, 1996
Progress in optical computing, optical communication and optical information processing depends on a large extent of the availability of fast all-optical switches. Most of the all-optical switches utilize nonlinear FP cavity1,2,3. Its absorptive loss is very large because of working on the resonant wavelength, and the switching time is districted by ...
Miao Yang, Jinhai Si, Yuxiao Wang, Chunfei Li   +3 more
openaire   +1 more source

Single spin-configuration singlet states

The Journal of Chemical Physics, 1977
It is shown that no single spin-configuration singly excited singlet state can exist which is at the same time self-consistent and orthogonal to the closed shell ground state, unless the orthogonality is assured by differing symmetry of the two states.
H. H. Jaffé, N. Kondo, J. Singerman, L. Bouscasse   +3 more
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Dimethylcarbene: A Singlet Ground State?

Journal of the American Chemical Society, 1995
Ab initio molecular electronic structure theory has been used to determine the energy separation between the lowest {sup 3}B{sub 1} and {sup 1}A states of dimethylcarbene. The geometries of both states have been optimized at the self-consistent Field(SCF) and the single and double excitation configurationinteraction (CISD) levels of theory using ...
Claude A. Richards, Seung-Joon Kim, Yukio Yamaguchi, Henry F. Schaefer   +3 more
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Coupled double triplet state in singlet fission

Physical Chemistry Chemical Physics, 2018
The highly unusual state, 1(TT), is a coupled, double triplet state that has recently garnered significant attention.
Hyungjun Kim, Paul M. Zimmerman
openaire   +2 more sources

Nuclear Singlet Spin States

2017
Isolated pairs of spin-1/2 nuclei can be prepared in a singlet state configuration that is immune to intrapair dipole–dipole relaxation, often the main source for the longitudinal magnetization decay constant T1. Because of this property singlet states can hold polarization for much longer than T1.
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Slow Diffusion by Singlet State NMR Spectroscopy

Journal of the American Chemical Society, 2005
Small diffusion coefficients can be measured by using populations of singlet states that have a relaxation time constant, T(s), which can be much longer than the longitudinal relaxation time, T1. Spatial information can be encoded with pulsed field gradients in the manner of stimulated echo sequences.
Simone, Cavadini, Jens, Dittmer, Sasa, Antonijevic, Geoffrey, Bodenhausen   +3 more
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Magnetism in singlet ground states

Hyperfine Interactions, 1997
The spin‐gap phenomenon is a key characteristic of high Tc superconducting cuprates, whose experimental results are summarized and discussed in the context of the slave‐boson mean field theory of the extended t–J model. It is seen that there exists satisfactory agreement between theory and experiments in bilayer cuprates.
openaire   +1 more source

Singlet ground state actinide chemistry with geminals

Physical Chemistry Chemical Physics, 2015
We present the first application of the variationally orbital optimized antisymmetric product of 1-reference orbital geminals (vOO-AP1roG) method to singlet-state actinide chemistry.
Paweł, Tecmer, Katharina, Boguslawski, Paul W, Ayers   +2 more
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The lowest singlet states of octatetraene revisited

The Journal of Chemical Physics, 2011
The two lowest excited singlet states of all-trans-1,3,5,7-octatetraene, 2 1A−g and 1 1B+u, are studied by means of high level ab initio methods computing the vertical and adiabatic excitation energies for both states and the vertical emission energy for the \documentclass[12pt]{minimal}\begin{document}${1{\hspace{1.42271pt}}{^1{\rm A}_g^-}}$\end ...
ANGELI, Celestino, M. Pastore
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Excited singlet state properties of anthracenedione photosensitizers

Journal of Photochemistry and Photobiology B: Biology, 1992
The absorption, fluorescence and S1 state kinetics of anthracycline antitumour drugs (e.g. daunomycin, adriamycin) and several imino- and/or amino-substituted derivatives are investigated. The study, which includes all anthracyclines which possess photocytocidal activity, is extended to the disubstituted aminoanthracenedione, mitoxantrone, a red-light ...
ANDREONI, ALESSANDRA, COLASANTI A., ROBERTI G.   +2 more
openaire   +3 more sources