title: Determination of the formation constant for the inclusion complex between Lanthanide ions and Dansyl chloride derivative by fluorescence spectroscopy: theoretical and experimental investigation.
abstract: In this paper, a sensitive, easy, efficient, and suitable method for the calculation of K(f) values of complexation between one derivative of Dansyl chloride [5-(dimethylamino) naphthalene-1-sulfonyl 4-phenylsemicarbazide] (DMNP) and Lanthanide(III) (Ln) ions is proposed, using both spectrofluorometric and spectrophotometric methods. Determination of K(f) showed that DMNP was mostly selective towards the erbium (III) ion. The validity of the method was also confirmed calculating the Stern-Volmer fluorescence quenching constants (K(sv)) that resulted in the same consequence, obtained by calculating the K(f) of complexation values. In addition, the UV-vis spectroscopy was applied for the determination of K(f) only for the Ln ions that had interactions with DMNP. Finally, the DFT studies were done on Er(3+) and the DMNP complex for distinguishing the active sites and estimating the pair wise interaction energy. It can be concluded that this derivative of Dansyl chloride with inherent high fluorescence intensity is a suitable reagent for the selective determination of the Er(3+) ion which can be used in constructing selective Er(3+) sensors.
authors: Institute of Petroleum Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran. riahisv@khayam.ut.ac.ir
authors: Siavash
authors: S
authors: Riahi
authors: Mohammad Reza
authors: MR
authors: Ganjali
authors: Maryam
authors: M
authors: Hariri
authors: Shaghayegh
authors: S
authors: Abdolahzadeh
authors: Parviz
authors: P
authors: Norouzi
mesh_terms: D003619:Dansyl Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D007477:Ions / Q000737:chemistry*; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D046911:Macromolecular Substances / Q000138:chemical synthesis* / Q000737:chemistry; D008954:Models, Biological; D008958:Models, Molecular; D008962:Models, Theoretical; D012663:Semicarbazides / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D019265:Spectroscopy, Near-Infrared
chemical_list: C545078:5-(dimethylamino)naphthalene-1-sulfonyl-4-phenylsemicarbazide; D003619:Dansyl Compounds; D007477:Ions; D028581:Lanthanoid Series Elements; D046911:Macromolecular Substances; D012663:Semicarbazides; C033853:dansyl acid; C029038:dansyl chloride