title: Study on the inclusion behavior of p-sulphonatocalix[4]arene with 9-amino-acridine by spectrofluorometric titrations.
abstract: Spectrofluorometric titrations have been performed to investigate the inclusion behavior of p-sulphonatocalix[4]arene (SC4A) and 9-amino-acridine (AA) in citrate buffer solution (pH 5.92). It was found that the fluorescence intensity of AA quenched regularly upon the addition of SC4A. The proposed interaction mechanism between SC4A and AA indicates that AA partially goes into the cavity of SC4A with the help of strong electrostatic interaction and hydrogen bonding, which formed by the protonated N atom and the amino groups of AA bonding with sulphonyl groups of SC4A, respectively. The inclusion ratio was 1:1 and the inclusion constant was 1.84 x 10(5) L mol(-1) at 25.0 degrees C.
authors.affiliation: College of Chemistry and Materials Science, Anhui Key Laboratory of Functional Molecular Solids, Anhui Normal University, Wuhu 241000, China. zy161299@mail.ahnu.edu.cn
authors.forename: Yunyou
authors.initials: Y
authors.lastname: Zhou
authors.forename: Qin
authors.initials: Q
authors.lastname: Lu
authors.forename: Chun
authors.initials: C
authors.lastname: Liu
authors.forename: Shike
authors.initials: S
authors.lastname: She
authors.forename: Lun
authors.initials: L
authors.lastname: Wang
mesh_terms: D000585:Aminacrine / Q000737:chemistry*; D047250:Calixarenes / Q000737:chemistry*; D005453:Fluorescence; D046911:Macromolecular Substances; D010636:Phenols / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D017186:Titrimetry
chemical_list: D046911:Macromolecular Substances; D010636:Phenols; C121325:calix(4)arene; D047250:Calixarenes; D000585:Aminacrine