Optical basicity definition

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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. WebSep 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.

Optical basicity of ionic liquids - Physical Chemistry Chemical …

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 … WebOct 10, 2024 · Optical basicity is identified as the average electron donor power of a fluorinated or oxidic compound ( Herrmann et al., 2015 ). For a glass system consisting of … birmingham blues football

Optical Basicity and Refractivity of Germanate Glasses

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) WebJun 25, 2024 · So, lanthanum is accountable for the increase of non-bridging oxygen due to this shift is obtained. So, the optical bandgap of these glasses has been decreased as well as the refractive index. Polarizability and basicity of the prepared glasses according to the refractive index and optical bandgap have been investigated. WebAug 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 … birmingham bmw inventory

Optical Band Gap, Oxidation Polarizability, Optical Basicity and ...

Optical basicity and refractivity of aluminosilicate glasses

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 ... WebThe 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 frameworks. birmingham bmw dealershipWebThis paper reports on different physical and optical properties of Nd 3+ -doped bismuth borate glasses. The glasses containing Nd 3+ in (25 − x)Bi 2 O 3 :20Li 2 O:20ZnO:35B 2 O 3 :xNd 2 O 3 (where x = 1, 1.5, 2 mol%) have been prepared by melt-quenching method. The amorphous nature of the glasses was confirmed by X-ray diffraction studies. birmingham bmw staff

"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 … " - Optical basicity definition

Optical basicity definition

Table 2 . Optical basicity of the slag components used in the...

WebIt is shown that optical basicity avoids the confusion that can arise from the use of empirical basicity ratios, particularly with regard to the effect of magnesia, and in addition,...

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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). 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.

WebTY - 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 … WebFeb 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 …

WebBasicity (in metallurgy), the ratio (in percent by weight) of basic and acidic oxides in iron ore materials (iron ore, sinter, and pellets), and also in blast-furnace and steel-smelting slag. Basicity defines the chemical composition and metallurgical properties of such materials. WebJul 1, 2001 · The basicity (i.e. %CaO/%SiO2) or J o u r n a l P r e -p r o o f basicity indices (weight ratio of basic oxides to acid oxides) are often used to evaluate the chemical …

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 26, 2015 · A new method (named as DASF: Derivation of absorption spectrum fitting) is proposed for the determination of optical band gap and the nature of optical transitions in semiconductors; this method only requires the measurement of the absorbance spectrum of the sample, avoiding any needs to film thickness or any other parameters. dan dee white puppyWebThe 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. birmingham boat showWebIn optics, optical bistability is an attribute of certain optical devices where two resonant transmissions states are possible and stable, dependent on the input. Optical devices with a feedback mechanism, e.g. a laser, provide two methods of achieving bistability . birmingham board of education agendaWebOptical 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 … dan dee tickety toc dancing chicken plushWebJul 27, 2011 · Basicity is expressed using the Smith {alpha} parameter scale. A linear relation was found between the oxide electronegativity and the Smith {alpha} parameter, … dandefirearms.comWebApr 6, 2024 · Optical basicity, K, is a parameter that often correlates with the level of depolymerization of a conventional glass network where it will be higher as more non-bridging oxygen atoms and ionic... birmingham board of education human resourcesWebDec 2, 1997 · (1) is that any number of compositions (containing, for ex- ample, differing proportions of Li20, NazO, CaO, B203, SiO2) can be formulated to produce a glass or melt of given basicity. In other words, AideaI is a quantity devoid of specific structural or mecha- nistic information. birmingham board of education meeting