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Anthracene is a solid polycyclic aromatic hydrocarbon (PAH) of formula C 14 H 10, consisting of three fused benzene rings. It is a component of coal tar . Anthracene is used in the production of the red dye alizarin and other dyes, as a Scintillator to detect high energy particles, as production of pharmaceutical drugs.
Standard refractive index measurements are taken at the "yellow doublet" sodium D line, with a wavelength (λ) of 589 nanometers. There are also weaker dependencies on temperature , pressure / stress , etc., as well on precise material compositions (presence of dopants , etc.); for many materials and typical conditions, however, these ...
The absolute refractive index n of an optical medium is defined as the ratio of the speed of light in vacuum, c = 299 792 458 m/s, ...
The most general form of Cauchy's equation is = + + +,where n is the refractive index, λ is the wavelength, A, B, C, etc., are coefficients that can be determined for a material by fitting the equation to measured refractive indices at known wavelengths.
The reaction of C 60 with anthracene is conveniently conducted in refluxing naphthalene to give the 1:1 ... Refractive index; 1-Naphthoic acid: C 11 H 8 O 2: 172.18: ...
9,10-Bis(phenylethynyl)anthracene (BPEA) is an aromatic hydrocarbon with the chemical formula is C 30 H 18. It displays strong fluorescence and is used as a chemiluminescent fluorophore with high quantum efficiency. It is used in lightsticks as a fluorophor producing ghostly green light. It is also used as a dopant for organic semiconductors in ...
The refractivity of a single molecule is the refractive volume k(MW)/N A in nm 3, where MW is the molecular weight and N A is the Avogadro constant. To calculate the optical properties of materials using the polarizability or refractivity volumes in nm 3 , the Gladstone–Dale relation competes with the Kramers–Kronig relation and Lorentz ...
The high scintillation luminosity is surprising because (1) with a refractive index of about 3.5, escape is inhibited by total internal reflection and (2) experiments at 90K report narrow-beam infrared absorption coefficients of several per cm. [44] [45] [46] Recent Monte Carlo and Feynman path integral calculations have shown that the high ...