RESUMEN
A new 3D metal-organic framework {[Cd16(tr2btd)10(dcdps)16(H2O)3(EtOH)]â15DMF}n (MOF 1, tr2btdâ¯=â¯4,7-di(1,2,4-triazol-1-yl)benzo-2,1,3-thiadiazole, H2dcdpsâ¯=â¯4,4'-sulfonyldibenzoic acid) was obtained and its luminescent properties were studied. MOF 1 exhibited bright blue-green luminescence with a high quantum yield of 74â¯% and luminescence quenching response to a toxic natural polyphenol gossypol and luminescence enhancement response to some trivalent metal cations (Fe3+, Cr3+, Al3+ and Ga3+). The limit of gossypol detection was 0.20⯵M and the determination was not interfered by the components of the cottonseed oil. The limit of detection of gallium(III) was 1.1⯵M. It was demonstrated that MOF 1 may be used for distinguishing between the genuine sunflower oil and oil adulterated by crude cottonseed oil through qualitative luminescent and quantitative visual gossypol determination.
Asunto(s)
Galio , Gosipol , Estructuras Metalorgánicas , Petróleo , Aceite de Semillas de Algodón , Luminiscencia , CulinariaRESUMEN
Addition of [Mo(2)(V)O(2)(µ-O)(µ-S)(aq)](2+) linker-type units to a solution/dynamic library containing tungstates results via the formation of the complementary pentagonal {(W)W(5)} units logically in the self-assembly of a mixed oxide/sulphide {W(VI)(72)Mo(V)(60)}-type Keplerate, thereby demonstrating the ability to tune the capsule's skeletal softness (the (µ-O)(2) and (µ-S)(2) scenarios are known) and providing options to influence differently important capsule-substrate interactions.