title: The interaction of taurine-salicylaldehyde Schiff base copper(II) complex with DNA and the determination of DNA using the complex as a fluorescence probe.
abstract: The interaction of taurine-salicylaldehyde Schiff base copper(II) (Cu(TSSB)2(2+)) complex with DNA was explored by using UV-vis, fluorescence spectrophotometry, and voltammetry. In pH 7.4 Tris-HCl buffer solution, the binding constant of the Cu(TSSB)2(2+) complex interaction with DNA was 3.49 x 10(4) L mol(-1). Moreover, due to the fluorescence enhancing of Cu(TSSB)2(2+) complex in the presence of DNA, a method for determination of DNA with Cu(TSSB)2(2+) complex as a fluorescence probe was developed. The fluorescence spectra indicated that the maximum excitation and emission wavelength were 389 nm and 512 nm, respectively. Under optimal conditions, the calibration graphs are linear over the range of 0.03-9.03 microg mL(-1) for calf thymus DNA (CT-DNA), 0.10-36 microg mL(-1) for yeast DNA and 0.01-10.01 microg mL(-1) for salmon DNA (SM-DNA), respectively. The corresponding detection limits are 7 ng mL(-1) for CT-DNA, 3 ng mL(-1) for yeast DNA and 3 ng mL(-1) for SM-DNA. Using this method, DNA in synthetic samples was determined with satisfactory results.
authors.affiliation: College of Chemistry and Materials Science, Anhui Key Laboratory of Chemo-Biosensing, Anhui Normal University, Peking Road 1, Wuhu 241000, PR China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Zhang
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.forename: Qianru
authors.initials: Q
authors.lastname: Zhang
authors.forename: Zhousheng
authors.initials: Z
authors.lastname: Yang
mesh_terms: D000447:Aldehydes / Q000378:metabolism*; D000818:Animals; D002417:Cattle; D003300:Copper / Q000378:metabolism*; D004247:DNA / Q000032:analysis*; D055664:Electrochemical Techniques; D005456:Fluorescent Dyes / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D015335:Molecular Probes / Q000378:metabolism*; D012545:Schiff Bases / Q000378:metabolism*; D012996:Solutions; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013654:Taurine / Q000378:metabolism*
chemical_list: D000447:Aldehydes; D005456:Fluorescent Dyes; D015335:Molecular Probes; D012545:Schiff Bases; D012996:Solutions; C013243:salicylaldehyde; D013654:Taurine; D003300:Copper; D004247:DNA; C427203:calf thymus DNA