Fluorescent Sensing of Chlorophenols in Water Using an Azo Dye Modified β-Cyclodextrin Polymer
نویسندگان
چکیده
A water soluble azo dye modified β-cyclodextrin polymer 4 was synthesized and used as a chemosensor for the detection of chlorinated phenols, model chlorinated by-products (CBPs) of water treatment for drinking purposes. The characterization of the intermediates and the azo dye modified β-CD polymer was done by UV/Vis Spectrophotometry, FT-IR and (1)H-NMR spectroscopies. The chlorophenols were capable of quenching the fluorescence of the polymer. The polymer showed greater sensitivity towards 2,4-dichlorophenol, with a sensitivity factor of 0.35 compared to 0.05 and 0.12 for phenol and 4-chlorophenol, respectively. The stability constants (K(s)) of the pollutants were also determined by the Benesi-Hildebrand method to be 2.104 × 10(3) M(-1) for 2,4-dichlorophenol and 1.120 × 10(2) M(-1) for 4-chlorophenol.
منابع مشابه
Removal of Reactive Dyes from Wastewater using Cyclodextrin Functionalized Polyacrylonitrile Nanofibrous Membranes
Electrospinning of nanofibers with cyclodextrin (CD) is attractive because the produced fibers can potentially increase the efficiency of nanofibrous membranes by facilitating the complex formation with organic compounds and high surface area of the nanofibers. In this work, polyacrylonitrile (PAN) nanofibers functionalized with β– cyclodextrin (βCD) during an electrospinning process were used ...
متن کاملThe Effect of Water Soluble Polymers on Felodipine Aqueous Solubility and Complexing Abilities with Natural and Modified β-Cyclodextrin
Purpose of this study was to investigate the effect of the presence of the water soluble polymers viz HPMC, PVP and PEG 6000 on aqueous solubility and complexation abilities of felodipine with or without presence of β-cyclodextrin (βCD) and HPβCD by phase solubility studies. The data revealed the initial increase in drug solubility followed by plateau in t...
متن کاملCyclodextrin-induced host–guest effects of classically prepared poly(NIPAM) bearing azo-dye end groups
A thermo-, pH- and cyclodextrin- (CD) responsive poly(N-isopropylacrylamide) (PNIPAM), with a N,N-dimethylaminoazobenzene end group was synthesized. Using 3-mercaptopropionic acid as a chain transfer agent, PNIPAM with a well-defined COOH end group was obtained. The acid end group was transferred to the corresponding acid chloride and then functionalized with N,N-dimethyl[4-(4'-aminophenylazo)p...
متن کاملApplication of Magnetic Polymer Particles Modified with β–Cyclodextrin for Adsorption of Bovine Serum Albumin
Magnetic polymer particles which were modified by vinyl groups and subjected topolymerization by vinyl β-Cyclodextrin derivative, has been used as adsorbent for sorption andrelease of bovine serum albumin and the equilibrium and kinetics of the adsorption process werestudied. The absorbability and releasing of this protein through the new polymer has beenmeasured by ultraviolet-visible spectros...
متن کاملHyperchromisity and molecular recognition of a novel modified β-cyclodextrin tethering with phenylaminoazobenzene.
A modified β-cyclodextrin (1) tethered with a phenylaminoazobenzen moiety has been synthesized for the purpose of developing a new guest-responsive color-change chemosensor. When the solution became acidic, 1 changed color from yellow to purple due to a structural change of the dye moiety from the azo form to the azonium one by protonation on the azo group. However, the pH titration curve of 1 ...
متن کامل