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181.
Pervin Deveci Bilge Taner Zafer Üstündağ Zeynel Kılıç Ali Osman Solak Emine Özcan 《Journal of Solid State Electrochemistry》2012,16(3):985-992
The modification of N-phenyl-aza-15-crown-5 (PA15C5) and N-(4-aminophenyl)-aza-15-crown-5 (4APA15C5) on glassy carbon (GC) electrode was performed by the electrochemical oxidation
of the corresponding azacrown derivatives in anhydrous acetonitrile media. The electrochemical behavior of the resulting modified
GC electrode was investigated in the presence of electroactive redox probes and these results, together with the X-ray photoelectron
spectroscopy (XPS) and reflection-absorption infrared spectroscopy were used to confirm the attachment of these molecules
onto the GC surface. The ellipsometric thicknesses of PA15C5 and 4APA15C5 films at the GC surface was obtained around 9.28 ± 0.40
and 10.50 ± 1.10 nm, respectively. Azacrown modified nanoscale surfaces serve as alkali metal sensor specific for their cavity
in the crown ring. 相似文献
182.
Two flavonoid glycosides (compounds 1 and 3) of which one is reported for the first time and a methylinositol (compound 2) were isolated from the aerial parts of Ebenus haussknechtii (Leguminosae). The structures were established as quercetin-7-O-[alpha-L-rhamnopyranosyl(1 --> 6)-beta-D-galactopyranoside] (1), morin-3-O-[4-[5-(4-hydroxyphenyl)pentanoyl]-alpha-L-rhamnopyranosyl(1 --> 6)-beta-D-galactopyranosyl]-7-4'-di-O-methyleter (3), and methylinositol (2) on the basis of chemical and spectroscopic means. The antimicrobial activities of the extracts have also been examined. 相似文献