Optical basicity definition

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WebOct 1, 2014 · A method for rough estimation of the optical thickness of solar prominences in Halpha line is presented. The method is based on the fitting of observed profiles with the synthetic ones computed... WebPolarisability and polarising power of rare earth ions in glass: an optical basicity assessment — The University of Aberdeen Research Portal Polarisability and polarising power of rare earth ions in glass: an optical basicity assessment John A Duffy Chemistry Research output: Contribution to journal › Article › peer-review 41 Citations (Scopus)

Optical basicity of ionic liquids - Physical Chemistry Chemical …

WebOptical basicity was proposed by Duffy and Ingram [1,2] is used as a measure of acid- base properties of oxides and glasses. Dimitrov and Sakka [3] have estimated the optical … WebThe optical basicity of complex nitrides can therefore be calculated by the same method established for oxides using the equivalent fractions and the basicity of the constituent nitrides. The relationship between nitride polarizability α N and basicity Λ(nitride) was found to be linear, with Λ(nitride) = 0.39α N − 0.14 where α N is given ... dark brown cupcake liners

Optical basicity of ionic liquids - Physical Chemistry Chemical …

WebBasicity definition: The quality or condition of being a base. The capacity of an acid to react with a base, measured by the number of hydrogen atoms that can be replaced by a base. WebAug 17, 1998 · The optical basicity Λ of the oxides has been estimated on the basis of average electronic oxide polarizability calculated from the refractive index Λ(n 0) and the energy gap Λ(E g). A good agreement has been observed between the optical basicity data obtained using independent initial quantities. WebNov 30, 2024 · modifier. The molar polarizability, αm, oxide ion polarizability, αo2-and optical basicity, Λ of the glasses are calculated by Lorentz-Lorenz equation. The glasses were found to possess αm values 3, and αo2-values between 3.303 to 4.772. Meanwhile, optical basicity increases from 0.115 to 0.893. Keywords: barium oxide, refractive index ... dark brown crystal stone

A new method for the determination of optical band gap and

Optical basicities and structural dynamics in glassy materials

WebOptical basicity analysis of glasses containing trivalent scandium, yttrium, gallium and indium John A Duffy Chemistry Research output: Contribution to journal › Article › peer-review 18 Citations (Scopus) Overview Cite this APA Standard Harvard Vancouver Author BIBTEX RIS Duffy, J. A. (2005). WebThe optical basicity addresses the ability of oxide glass in contributing the negative charges in the glass ma-trix. In other words it defines the electron donating power of the oxygen in the oxides glass. The theoretical opt-ical basicity can be calculated by the equation proposed by duffy and Ingram [23] dark brown crusty lesion on skinWebFeb 13, 2024 · The concept of “basicity ” has been central to our understanding of slag chemistry for many decades. Traditionally, basicity has been connected to the level of … bischoff centuro s4

"WebMar 16, 2024 · The development of chemosensors able to detect analytes in a variety of sample matrices through a low-cost, fast, and direct approach is of current interest in food, health, industrial, and environmental fields. This contribution presents a simple approach for the selective and sensitive detection of Cu2+ ions in aqueous solution based on a … " - Optical basicity definition

Optical basicity definition

Optical basicity: a scale of acidity/basicity of solids and its ...

Webbasicity is a predominant factor for both properties and structure of glasses, and it may cover exhaustively the relation among composition, structure and properties. Basicity can … WebEllipsometry is an optical technique that measures changes in polarization (phase, Δ, and amplitude, Ψ) of monochromatic light reflecting from matter, and these standard ellipsometric parameters Ψ and Δ are related to the complex ratio of reflection coefficient for light polarized parallel p and perpendicular s to the plane of incidence. 2.3.3.

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http://www.ecm.okayama-u.ac.jp/ceramics/Research/Papers/2011/Nanba_JCSJ_119(2011)720.pdf WebAug 13, 2002 · The acid−base properties of germanate glasses cannot presently be compared quantitatively with those of silicate, borate, and several other glasses because the optical basicity of the parent oxide, Λ(GeO2), has not yet been unequivocally established. The usual method of measuring optical basicity, relying on probe ions such as Tl+ or …

WebAug 13, 2002 · The acid−base properties of germanate glasses cannot presently be compared quantitatively with those of silicate, borate, and several other glasses because … WebAug 1, 1993 · Optical basicity is particularly useful for oxidic network systems, such as silicate, phosphate, or borate in crystalline, vitreous, and liquid (molten) form. The …

WebOptical basicity: a scale of acidity/basicity of solids and its application to oxidation catalysis. Elisabeth Bordes-Richard, Pierre Courtine To cite this version: Elisabeth Bordes … WebSlag Basicity is a measure of the acidic-basic character of the oxides, widely used by the glass scientists, slag metallurgists and some geologists as well. You will get the details …

WebFeb 1, 2024 · The concept of optical basicity (Λ) is particularly suited to binary oxides and oxidic network materials such as silicates to characterize the acid–base nature of glasses and melts and to account for the complexation of metal cations by a variety of anionic …

WebThe concept of optical basicities initially developed by Duffy for solid oxides was successfully transferred to low melting salts such as ionic liquids (ILs). Several ionic liquids (ILs) were doped with Mn (NTf 2) 2 ( NTf 2 = bis (trifluoromethanesulfonyl)imide) as a probe to investigate the IL anion basicity by means of UV-Vis spectroscopy. dark brown cross body pursesWebAug 1, 1993 · 4) Optical basicity is a concept arising from a consideration of the ionic/covalent nature of bonding between a Lewis acid and base and is quantitatively … bischoff car wash salt lake cityWebThe concept of optical basicities initially developed by Duffy for solid oxides was successfully transferred to low melting salts such as ionic liquids (ILs). Several ionic … dark brown curly human hair wigWebTY - JOUR. T1 - Optical basicity and refractivity of aluminosilicate glasses. AU - Duffy, John A. PY - 2003. Y1 - 2003. N2 - Refractivity data for aluminosilicate glasses (densities and refractive indices) have been used to examine the relationship between oxygen polarisability, alpha(O2-), and optical basicity, and also to calculate the basicity moderating parameter … bischoff christian loginWebFeb 25, 2002 · The optical basicity for La 2 O 3 oxide is found to be 1.07, being much larger compared with typical glass-forming oxides such as B 2 O 3 (0.42) and SiO 2 (0.48) but … bischoff chocolate factoryWebSep 1, 2003 · Optical basicity of a medium is strongly influenced by the polarizing strength of the cations present. A strongly polarizing cation will attract and bind the ligands towards that cation. Such binding reduces the electron donating power of the ligands towards the probe ion resulting in smaller optical basicity. dark brown curly hairWebThe optical basicity of complex nitrides can therefore be calculated by the same method established for oxides using the equivalent fractions and the basicity of the constituent … dark brown curly clip in hair extensions