scholarly journals Chemical bond parameters, bond energy and the local crystal sites of Eu3+ in Ca5(BO3)3F:1% Eu3+ phosphor

RSC Advances ◽  
2018 ◽  
Vol 8 (56) ◽  
pp. 32325-32332 ◽  
Author(s):  
Yuhan Zhu ◽  
Yu Pan ◽  
Wenjun Wang ◽  
Haibing Xu ◽  
Liqun Zhou ◽  
...  
Keyword(s):  
Chemical Bond ◽  
Bond Energy ◽  
Coordination Environment

The coordination environment mechanism of Ca1 (or Eu1), Ca2 (or Eu2), Ca3 (or Eu3) in Ca5(BO3)3F:1% Eu.

Electrochemical oxidation of H2 catalyzed by ruthenium hydride complexes bearing P2N2 ligands with pendant amines as proton relays

2014 ◽  
Vol 7 (11) ◽  
pp. 3630-3639 ◽  
Author(s):  
Tianbiao Liu ◽  
Mary Rakowski DuBois ◽  
Daniel L. DuBois ◽  
R. Morris Bullock
Keyword(s):  
Electrochemical Oxidation ◽  
Chemical Bond ◽  
Bond Energy ◽  
Diphosphine Ligands ◽  
Ruthenium Hydride ◽  
Hydride Complexes ◽  
New Class ◽  
Oxidation Of H2

A new class of Ru electrocatalysts containing P2N2 diphosphine ligands with pendant amines converts the chemical bond energy of H2 to electricity.

A study on the photocatalytic sterilization performance and mechanism of Fe-SnO2/g-C3N4 heterojunction materials

2020 ◽  
Vol 44 (22) ◽  
pp. 9456-9465
Author(s):  
Xin Chen ◽  
Qing Wang ◽  
Jing Tian ◽  
Yuanyuan Liu ◽  
Yiding Wang ◽  
...  
Keyword(s):  
Chemical Bond ◽  
Bond Energy ◽  
Biochemical Reaction ◽  
Reaction Energy ◽  
Sterilization Mechanism ◽  
Performance And Mechanism

From the perspective of the biochemical reaction energy and chemical bond energy, the Z-scheme charge sterilization mechanism was enriched and perfected.

Evidence of thunder being a chemical explosion of air

2003 ◽  
Vol 69 (3) ◽  
pp. 187-197 ◽  
Author(s):  
PETER GRANEAU ◽  
NEAL GRANEAU ◽  
GEORGE HATHAWAY
Keyword(s):  
Thermal Expansion ◽  
Chemical Bond ◽  
Bond Energy ◽  
Laboratory Experiments ◽  
Sonic Booms ◽  
Lightning Channel ◽  
Air Explosion ◽  
Chemical Explosion

In 1989, it was proved that thunder is not caused by the thermal expansion of the lightning channel. The present paper suggests that it is the result of an air explosion driven by the liberation of chemical bond energy from the N2 and O2 molecules. This has been confirmed by laboratory experiments with air arcs of lightning strength. These arcs are short pieces of lightning strokes and their formation is accompanied by thunder-like sonic booms.

The recognition of bioenergetic processes

1975 ◽  
Vol 189 (1095) ◽  
pp. 235-248
Keyword(s):  
Chemical Bond ◽  
Bond Energy ◽  
Energy Supply ◽  
High Energy ◽  
Bacterial Photosynthesis ◽  
Energy Carrier ◽  
Purine Derivatives ◽  
Energy Carriers ◽  
Starting Point ◽  
Plant Photosynthesis

The basis of bioenergetics on Earth is briefly analysed. There are four types of energy supply (1) heterotrophy, (2) chemi-autotrophy, (3) bacterial photosynthesis and (4) plant photosynthesis. The main energy carrier is ATP. There are in addition many other classes of high-energy compounds such as amidine-, acyl-, carbamyl-, and enol-phosphates, acylthioesters, acyl-imidazoles, and onium compounds. Still other compounds can be envisaged. Taking these processes as a starting point, several possible modifications are suggested. Bioenergetics now centres around radiant and chemical bond energy. In other conditions other forms of energy for life processes are possible (electrical, mechanical, thermal, etc.). Guanine is a serious alternative to adenine, and, perhaps less likely but not negligible, other stable purine-derivatives. Several other compounds, such as porphin, isoalloxazines, etc., are very stable and are excellent candidates as alternate energy carriers. Free pyrophosphate and metaphosphate are alternatives to ATP.

Density functionals and chemical bond, diatomic molecules

1989 ◽  
Vol 86 ◽  
pp. 853-859 ◽  
Author(s):  
Federico Moscardó ◽  
José Pérez-Jordá ◽  
Emilio San-Fabián
Keyword(s):  
Chemical Bond ◽  
Diatomic Molecules ◽  
Density Functionals

The Chemical Bond Across the Periodic Table: Part 1 – First Row and Simple Metals

2020 ◽  
Author(s):  
Gabriel Freire Sanzovo Fernandes ◽  
Leonardo dos Anjos Cunha ◽  
Francisco Bolivar Correto Machado ◽  
Luiz Ferrão
Keyword(s):  
Physical Chemistry ◽  
Chemical Bond ◽  
Materials Science ◽  
Chemical Elements ◽  
Orbital Theory ◽  
Solid State Physics ◽  
Band Theory ◽  
Van Der Waals Clusters ◽  
Earth Systems ◽  
Chemical Content

<p>Chemical bond plays a central role in the description of the physicochemical properties of molecules and solids and it is essential to several fields in science and engineering, governing the material’s mechanical, electrical, catalytic and optoelectronic properties, among others. Due to this indisputable importance, a proper description of chemical bond is needed, commonly obtained through solving the Schrödinger equation of the system with either molecular orbital theory (molecules) or band theory (solids). However, connecting these seemingly different concepts is not a straightforward task for students and there is a gap in the available textbooks concerning this subject. This work presents a chemical content to be added in the physical chemistry undergraduate courses, in which the framework of molecular orbitals was used to qualitatively explain the standard state of the chemical elements and some properties of the resulting material, such as gas or crystalline solids. Here in Part 1, we were able to show the transition from Van der Waals clusters to metal in alkali and alkaline earth systems. In Part 2 and 3 of this three-part work, the present framework is applied to main group elements and transition metals. The original content discussed here can be adapted and incorporated in undergraduate and graduate physical chemistry and/or materials science textbooks and also serves as a conceptual guide to subsequent disciplines such as quantum chemistry, quantum mechanics and solid-state physics.</p>

Sign in / Sign up

Export Citation Format

Share Document