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The activator is the main factor determining the phosphor emission wavelength. The nature of the host crystal can however to some degree influence the wavelength as well. More activators can be used simultaneously.
3,3’,4,4’-Benzophenone tetracarboxylic dianhydride (BTDA) is chemically, an aromatic organic acid dianhydride.It may be used to cure epoxy-based powder coatings.It has the CAS Registry Number of 2421-28-5 and a European Community number 219-348-1.
Other alternatives to HMPA include the N,N′-tetraalkylureas DMPU (dimethylpropyleneurea) [10] [11] or DMI (1,3-dimethyl-2-imidazolidinone). [12] Tripyrrolidinophosphoric acid triamide (TPPA) has been reported to be a good substitute reagent for HMPA in reductions with samarium diiodide [ 13 ] and as a Lewis base additive to many reactions ...
Dithionates, e.g. Na 2 S 2 O 6; Thiosulfates, e.g. Na 2 S 2 O 3 (mainly in analytical chemistry) [11] Iodides, such as potassium iodide (K I) (mainly in analytical chemistry) Hydrogen peroxide (H 2 O 2) – mostly an oxidant but can occasionally act as a reducing agent, typically in analytical chemistry [citation needed] Hydrazine (Wolff ...
Compared to TAED, which is the predominant bleach activator used in Europe, NOBS is efficient at much lower temperatures. At 20 °C NOBS is 100 times more soluble than TAED in water. [ 5 ] When attacked by the perhydroxyl anion (from hydrogen peroxide), NOBS forms peroxynonanoic acid (a peroxy acid ) and releases the leaving group sodium 4 ...
Activator may refer to: Activator (genetics), a DNA-binding protein that regulates one or more genes by increasing the rate of transcription; Activator (phosphor), a type of dopant used in phosphors and scintillators; Enzyme activator, a type of effector that increases the rate of enzyme mediated reactions
Hydroxybenzotriazole (abbreviated HOBt) is an organic compound that is a derivative of benzotriazole.It is a white crystalline powder, which as a commercial product contains some water (~11.7% wt as the HOBt monohydrate crystal).
Tetraacetylethylenediamine, commonly abbreviated as TAED, is an organic compound with the formula (CH 3 C(O)) 2 NCH 2 CH 2 N(C(O)CH 3) 2. It is a white solid commonly used as a bleach activator in laundry detergents and in the production of paper pulp. TAED is synthesized through the acetylation of ethylenediamine.