of conjugating with either the donor or the attracting portion of the heterocyclic system, consistent with contributions from isatylidene resonance forms which induce the C-8 carbon atom to be charged either positively or negatively, thus allowing an opposite sense of the push–pull effect. Copyrigh...
of conjugating with either the donor or the attracting portion of the heterocyclic system, consistent with contributions from isatylidene resonance forms which induce the C-8 carbon atom to be charged either positively or negatively, thus allowing an opposite sense of the push–pull effect. Copyrigh...
indoliumpush–pull effectpyrroliumThe strongest aromatic and antiaromatic pyrroliums are predicted based on the combination of hyperconjugation and push–pull effect via density functional theory calculations, highlighting the importance of transition metals in hyperconjugative aromaticity and demonstrating a ...
due to the strong "push–pull" effect along the hydrogen bond, which favors a head-to-tail arrangement of the molecules and enhances the SHG response... Shi,Jun,Luo,... - 《Journal of Physical Chemistry A》 被引量: 16发表: 2011年 加载更多来源...
A pre-amplifier stage formed of a differential amplifier is coupled to the single ended push-pull amplifying stage for supplying a signal thereto. The output terminals of the differential amplifier are connected to the respective gate electrodes of the field effect transistors included in the single...
In this work, we combined quantum chemistry and machine learning (ML) to study the first hyperpolarizability ( β ) in [2.2]paracyclophane-containing push–pull compounds with various terminal donor/acceptor pairs and molecular lengths. To generate reference β values for ML, the ab initio ...
Reported is a study on the influence of regioisomerism on the photophysical properties in 4-hydroxy-1,3-thiazole-based push-pull-chromophores/fluorophores to evaluate the molecular structure-property relationship as a basic foundation for future design strategies concerning this class of dyes. Surprising...
The effect of push-pull rod on the dynamic behavior of movable bridges In at least one embodiment, a table saw includes a table, a moveable carriage supported by the table, a saw assembly supported by the carriage, and a pull rod coupled to the carriage. The pull rod is configured to ...
They could also enhance the “push” effect. However, for both, attention must be directed towards obviating interference with the “push” and “pull” mechanisms. Repellents for pests and attractants for beneficials Already, in sub-Saharan African push–pull, the value of the homoterpenes ...
Both, extension of the conjugation and push-pull effect enhance the molecular hyperpolarizability gamma, even for the DAOPEs, which exhibit a hypsochromic... K Koynov,A Bahtiar,C Bubeck,... - 《Journal of Physical Chemistry B》 被引量: 41发表: 2005年 Synthesis, characterization and third-...