20098-17-3Relevant articles and documents
Chemically initiated electron exchange luminescence of silyloxyaryl-substituted spiroadamantyl dioxetanes: Kinetics and excited state yields
Trofimov, Alexei V.,Mielke, Karsten,Vasil'ev, Rostislav F.,Adam, Waldemar
, p. 463 - 467 (1996)
The kinetics of the fluoride-induced decomposition of the thermally stable silyloxyaryl-substituted spiroadamantyl dioxetanes la,b and the excited state formation of this chemically initiated electron exchange luminescence (CIEEL) have been investigated. Two timing kinetic regimes flash and glow have been identified, which depend on the fluoride concentration, the first at high, the second at low [F-] triggering, whose detailed kinetic analysis affords the rate constants for the deprotected dioxetanes 2a,b cleavage in acetonitrile and sulfoxide and chemiluminescence measurements the CIEEL and phenolate 4 (CIEEL emitter) excitation yields. Chloro-substitution in the spiroadamantyl dioxetane does not affect the deprotection step k2 but leads toa ca five-fold faster cleavage of the deprotected dioxetane 2, while the chemiexcitation yield is the same for both dioxetanes. The energies of the first excited singlet and triplet states of the emitting phenolate 4 were estimated by AM1 configuration interaction calculations with explicit consideration of acetonitrile as solvent (self-consistent reaction field approach). The first excited singlet and triplet state of the CIEEL emitter phenolate 4 possess π,π* character, as suggested by the π-type molecular orbitals and the large singlet-triplet energy gap. The chemiexcitation of both singlet and triplet states of the excited phenolate 4 is feasible during the dioxetanes 1a,b cleavage, but the experimentally determined high singlet excitation yields suggest that preferentially the phenolate 4 singlet state is populated in the fluoride ion-triggered CIEEL process.
Trace analysis of Zn(II), Be(II), and Bi(III) by enzyme-catalyzed chemiluminescence
Tripathy, Sukant
, p. 216 - 220 (1996)
A novel technique for the trace analysis of metal ions Zn(II), Be(II), and Bi(III) in bulk solutions is discussed. This technique involves the generation of a chemiluminescence signal from alkaline phosphatase catalyzed hydrolysis of a phosphate derivative of 1,2-dioxetane. Zn(II) can be determined by two methods, reactivation of the alkaline phosphatase apoenzyme and inhibition of the native enzyme. Be(II) and Bi(III) can be determined quantitatively by inhibition of the native enzyme. Subppb to ppm level detection of Zn(II), Be(II), and Bi(III) has been achieved. Initial studies with mixed metals are also reported. The technique described is rapid and sensitive and can be readily applied to the microassay of heavy metal ions.
Chemiluminescent 1,2-dioxetanes
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, (2008/12/08)
A method of generating light through chemiluminescence involves providing a stable 1,2-dioxetane of the formula: Wherein (a) R1 and R2 are each, individually, a chemical reactive site or when fused together form a chemical reactive site, and R3 and R4 are each, individually, a chemical reactive site or when fused together form a chemical reactive or (b) R1 has at least two hetero atoms with chemical reactive site and R3 and R4 are inactive site and R2 is a chemical reactive site.
Chlorination of Adamantane and Its Derivatives by Carbon Tetrachloride in the Presence of Manganese-, Vanadium-, and Molybdenum-containing Catalysts
Khusnutdinov,Shchadneva,Baiguzina,Lavrent'eva,Burangulova,Dzhemilev
, p. 126 - 133 (2007/10/03)
The feasibility of catalytic chlorination of adamantane and its derivatives by carbon tetrachloride in the presence of manganese-, vanadium-, and molybdenum-containing catalysts activated by nitrile ligands or alcohols was established. The optimum molar ratios of catalyst components and reactants and the optimum reaction conditions for selective syntheses of mono-, di-, and trichlorosubstituted adamantane derivatives with high yields were found.
