Results 11 to 20 of about 50,397 (308)
New Directions in Teaching Introductory and Organic Chemistry
Educación Química, 2022 To resolve several problems that arise in the teaching of hybrid atomic orbitals (HAO) and the valence-shell electron-pair repulsion (VSEPR) model, we propose an original way to present molecular structures, beginning with an analysis of the teaching of
Guy Lamoureux, J. F. Ogilvie
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Chemistry Teacher International, 2023 Relativistic effects are important to understand the chemistry of heavier elements across the periodic table (PT). Three important relativistic effects are: contraction of s- and p-orbitals (direct relativistic effect), expansion of d- and f-orbitals ...
Das Ankita +3 more
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Raman scattering spectra of amber [PDF]
E3S Web of Conferences, 2020 The Raman spectra of amber (succinite) of different transparency levels of the Palmniken Deposit of Kaliningrad of Russia were obtained using the Fourier Transform–Raman spectroscopy method, which allows obtaining real and elemental compositions.
Verkhovskaia Iana, Prokopenko Viktor
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PbTe Quantum Dots and Engineering of the Energy Band Alignment in Photovoltaic Applications
Süleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2021 Lead telluride (PbTe) quantum dots, despite being considered as one of the most promising candidates for future photovoltaics owing to their higher multiple exciton generation yields, have received limited attention in solar cell designs due their less ...
Tuğba Hacıefendioğlu, Demet Asil
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Química Nova, 2009 The present work discusses the appearance of the concepts of valence and molecular structure, and describes the appropriation and evolution of the concept of molecule in the period following the publication of Avogadro's Hypothesis.
Tânia de Oliveira Camel +2 more
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Communications Physics, 2023 The study of molecular valence electron dynamics and their coupling with nuclear motion is one of the frontiers of ultrafast physics and ultrafast chemistry. With time-resolved strong-field ion momentum spectroscopy, we study electron valence and nucleus
Xinning Zhao +15 more
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A Critical Look at Linus Pauling’s Influence on the Understanding of Chemical Bonding
Molecules, 2021 The influence of Linus Pauling on the understanding of chemical bonding is critically examined. Pauling deserves credit for presenting a connection between the quantum theoretical description of chemical bonding and Gilbert Lewis’s classical bonding ...
Sudip Pan, Gernot Frenking
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Nature Communications, 2020 Resolving concerted nuclear and electronic motion in real-time is a primary goal in chemistry. The authors monitor nuclear and valence electronic dynamics in the excited state single-bond isomerisation of a chromophore of photoactive yellow protein ...
Cate S. Anstöter +2 more
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Chemical Bonding: The Journey from Miniature Hooks to Density Functional Theory
Molecules, 2020 Our modern understanding of chemistry is predicated upon bonding interactions between atoms and ions resulting in the assembly of all of the forms of matter that we encounter in our daily life. It was not always so.
Edwin C. Constable +1 more
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Iron-based trinuclear metal-organic nanostructures on a surface with local charge accumulation
Nature Communications, 2018 Polynuclear metal-organic coordination complexes are often inaccessible by traditional synthetic chemistry methods. Here, the authors use on-surface supramolecular chemistry to form a planar trinuclear Fe complex, in which an accumulation of electrons ...
Cornelius Krull +10 more
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