title: Study on the inclusion interaction of p-sulfonated calix[n]arenes with Vitamin K3 using methylene blue as a spectral probe.
abstract: The characteristics of host-guest complexation between p-sulfonated calix[n]arene (SCnA, n = 4, 6) and Vitamin K(3) (VK(3)) were investigated by fluorescence spectrometry and absorption spectrometry using methylene blue (MB) as a probe. Interaction with MB and SCnA led to an obvious decrease in fluorescence intensity of MB, accompanying with shifts of emission peaks. Absorption peaks also showed interesting changes; however, when VK(3) was added, fluorescence intensity and absorbance recovered and a slight and slow red shift was observed. The obtained results showed that the inclusion ability of p-sulphonated calix[n]arenes towards VK(3) was the order: p-sulphonated calix[6]arene (SC6A) >p-sulphonated calix[4]arene (SC4A). Relative mechanism was proposed to explain the inclusion process.
authors.affiliation: Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China.
authors.forename: Qin
authors.initials: Q
authors.lastname: Lu
authors.forename: Jiashan
authors.initials: J
authors.lastname: Gu
authors.forename: Huapeng
authors.initials: H
authors.lastname: Yu
authors.forename: Chun
authors.initials: C
authors.lastname: Liu
authors.forename: Lun
authors.initials: L
authors.lastname: Wang
authors.forename: Yunyou
authors.initials: Y
authors.lastname: Zhou
mesh_terms: D001667:Binding, Competitive; D047250:Calixarenes / Q000737:chemistry*; D002623:Chemistry Techniques, Analytical / Q000379:methods; D005456:Fluorescent Dyes / Q000494:pharmacology; D006863:Hydrogen-Ion Concentration; D008751:Methylene Blue / Q000737:chemistry*; D008956:Models, Chemical; D008962:Models, Theoretical; D013050:Spectrometry, Fluorescence; D013053:Spectrophotometry / Q000379:methods; D013455:Sulfur / Q000737:chemistry; D013696:Temperature; D024483:Vitamin K 3 / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D047250:Calixarenes; D013455:Sulfur; D024483:Vitamin K 3; D008751:Methylene Blue