26095-97-6Relevant academic research and scientific papers
A ready-to-use fluorescence probe of Pd2+ in water: novel tricyclic heterocyclic base on 1,3,4-oxadiazole
Su, Ke,Huang, Xiaomei,Wei, Wei,Zeng, Xiaotong,Xiang, Siyu,Yang, Haijun
, p. 1690 - 1696 (2021)
A ready-to-use hetero-tricyclic compound, 5,5′-(furan-2,5-diyl) bis (1,3,4- oxadiazol-2-amine) (5), was synthesized with a good yield; it has an suitable fluorescence characteristic and research founded that it can respond to trace Pd2+ in water at a normal pH range. A fluorescence titration revealed the detection limit for Pd2+ was as low as 3.97 × 10?9 M. Density-functional theory calculation using Guassian09 implied that the breakage of conjugation and coplanarity of compound 5 led to fluorescence quenching. Compound 5 could be applied as a chemical probe to detect trace amounts of Pd2+ with good accuracy, fast response time, excellent selectivity, and high sensitivity. FT-IR, NMR, and MS were used to characterize the chemical structure of compound 5.
Synthesis of novel 2,5-bis(5-aryl-1,3,4-oxadiazol-2-yl)furans from furan-2,5-dicarboxylic acid dihydrazide and trichloromethylarenes
Luiksaar,Belen'kii,Krayushkin
, p. 871 - 874 (1999)
2,5-Bis(5-aryl-1,3,4-oxadiazol-2-yl)furans are synthesized via the reaction of trichloromethylarenes with furan-2,5-dicarboxylic acid dihydrazide. The structures of the products are confirmed by IR and mass spectra. 1999 KluwerAcademic/Plenum Publishers.
FLOW CHEMISTRY SYNTHESIS OF ISOCYANATES
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, (2021/06/22)
The disclosure provides, inter alia, safe and environmentally-friendly methods, such as flow chemistry, to synthesize isocyanates, such as methylene diphenyl diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and tetramethylxylene diisocyanate.
