scholarly journals INFLUENCEOFCROSSLINKINGAGENTON ELECTROCHEMICAL AND CONFORMATIONAL BEHAVIOR OF MOLECULARLY IMPRINTED POLYMERS BASED ON METHACRYLIC ACID AND 4-VINYLPYRIDINE IN AN AQUEOUS MEDIUM

2021 ◽  
Vol 73 (1) ◽  
pp. 103-118
Author(s):  
T.K. Jumadilov ◽  
◽  
R.G. Kondaurov ◽  
A.M. Imangazy ◽  
Kh. Khimersen ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Aqueous Medium ◽  
Methacrylic Acid ◽  
Molecularly Imprinted Polymers ◽  
Crosslinking Agent ◽  
Conformational Behavior ◽  
Glycol Dimethacrylate ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Control Samples

Molecularly imprinted polymers (MIPs) based on methacrylic acid (MAA) and 4-vinylpyridine (4VP) of two types have been synthesized (the difference in types is based on the use of ethylene glycol dimethacrylate (EGDMA) and diethylene glycol dimethacrylate (DEGDMA) as a crosslinking agent). Salts of cerium, praseodymium, neodymium, samarium, and europium were used as templates for the synthesis. Control samples of Molecularly imprinted polymers were also synthesized (samples synthesized in exactly the same way, but without the templates).Electrochemical and conformational behavior of the synthesized structures in an aqueous medium was studied. Molecularly imprinted polymers are weakly exposed to swelling and ionization due to tight crosslinking, while it should be noted that a high degree of crosslinking leads to high mechanical strength of macromolecular structures.Comparison of the measured parameters (electrical conductivity, pH) of molecularly imprinted polymers containing a template with control samples of MIP indicate the presence of cavities complementary to the template (rare-earth metal ion) used in their synthesis. In the presence of MIP synthesized in the presence of EGDMA (MIP-1) higher values of electrical conductivity and pH are observed as compared to MIP synthesized in the presence of DEGDMA (MIP-2) due to less tight crosslinking.

scholarly journals Synthesis of Molecularly Imprinted Polymers using Methacrylic Acid and Ethylene Glycol Dimethacrylate by Precipitation Polymerization Method

2021 ◽  
Vol 33 (4) ◽  
pp. 785-788
Author(s):  
St. Fauziah ◽  
F.A. Sullahi ◽  
N.H. Soekamto ◽  
P. Taba ◽  
A. Sapar
Keyword(s):  
Ethylene Glycol ◽  
Methacrylic Acid ◽  
Molecularly Imprinted Polymers ◽  
Dibutyl Phthalate ◽  
Precipitation Polymerization ◽  
Ethylene Glycol Dimethacrylate ◽  
Glycol Dimethacrylate ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Polymerization Method

The synthesis of molecularly imprinted polymers (MIPs) was carried out by using methacrylic acid as a monomer, ethylene glycol dimethacrylate as a crosslink and dibutyl phthalate as a mold through the precipitation polymerization method. The MIP was characterized with FTIR, surface area analyzer, SEM-EDS and ultraviolet-visible spectrophotometer. The MIP adsorption ability test variables for dibutyl phthalate were time and concentration. The FTIR indicates that the functional groups –OH, –C=O and –C=C contribute to the formation of MIP and the SEM-EDS analysis showed that the prepared MIP resembles as beads. The MIP’s ability to adsorb dibutyl phthalate is better than NIP and the optimum time to adsorb dibutyl phthalate is 60 min.

scholarly journals Preparation of New Molecularly Imprinted Polymers and its Use in the Selective Extraction For Determination Phenylephrine Hydrochloride at Pharmaceuticals

2019 ◽  
Vol 9 (04) ◽  
pp. 651-659
Author(s):  
Yehya K Al-Ezzy ◽  
Adnan R Mahdi ◽  
Suham T Ameen
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Pharmaceutical Analysis ◽  
Dibutyl Phthalate ◽  
Trisodium Citrate ◽  
Selective Extraction ◽  
Dioctyl Phthalate ◽  
Glycol Dimethacrylate ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Phenylephrine Hydrochloride

This study was aimed at four electrodes were synthesized based on molecularly imprinted polymers (MIPs). Two MIPs were prepared by using phenylephrine hydrochloride (PPH) as the template, methyl methacrylate (MMA) as monomer as well as trimethylol propane tri methacrylate (TMPTMA) and ethylene glycol dimethacrylate (EGDMA) as cross linkers respectively and benzoyl peroxide as initiator. The same composition was used in the preparation of non-imprinted polymers (NIPs), but without the template (Phenylephrine hydrochloride). For the preparation of membranes, different plasticizers were used in the PVC matrix, such as Dioctyl phthalate (DOPH), dibutyl phthalate (DBPH), and nitrobenzene (NB). The characteristics studied are the slop, detection limit, lifetime, and linearity range of PPH–MIPs electrodes. Results obtained from selectivity measurements on interfering cations (K+, Ca+2, Al+3) and some pharmaceutical additives such as methylparaben, propylparaben, trisodium citrate showed no interfering with drug phenylephrine hydrochloride. The preparation electrodes have been shown good response including testing pharmaceutical analysis.

Detection of Bisphenol A in aqueous medium by screen printed carbon electrodes incorporating electrochemical molecularly imprinted polymers

2018 ◽  
Vol 112 ◽  
pp. 156-161 ◽  
Author(s):  
Vitalys Mba Ekomo ◽  
Catherine Branger ◽  
Raphaël Bikanga ◽  
Ana-Mihaela Florea ◽  
Georges Istamboulie ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Aqueous Medium ◽  
Molecularly Imprinted Polymers ◽  
Carbon Electrodes ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Screen Printed

scholarly journals Preparation of Restricted Access Media-Molecularly Imprinted Polymers for the Detection of Chloramphenicol in Bovine Serum

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Shanwen Zhao ◽  
Chanling Wei ◽  
Zhian Sun ◽  
Huachun Liu ◽  
Yanqiang Zhou ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Bovine Serum ◽  
Crosslinking Agent ◽  
Template Molecule ◽  
Functional Monomer ◽  
Molecularly Imprinted ◽  
Restricted Access ◽  
Imprinted Polymers ◽  
Relative Standard ◽  
Restricted Access Media

Chloramphenicol- (CAP-) restricted access media-molecularly imprinted polymers (CAP-RAM-MIPs) were prepared by precipitation polymerization using CAP as a template molecule, 2-diethylaminoethyl methacrylate (DEAEM) as a functional monomer, ethylene glycol dimethyl acrylate (EDMA) as a crosslinking agent, glycidyl methacrylate (GMA) as an outer hydrophilic functional monomer, and acetonitrile as a pore former and solvent. The CAP-RAM-MIPs were successfully characterized by Fourier-transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. The adsorption performance was investigated in detail using static, dynamic, and selective adsorption experiments. Adsorption equilibrium could be reached within 11 min. The CAP-RAM-MIPs had a high adsorption rate and good specific adsorption properties. Scatchard fitting curves indicated there were two binding sites for CAP-RAM-MIPs. Adsorption was Freundlich multilayer adsorption and consistent with the quasi-second kinetic model. Using CAP-RAM-MIPs for selective separation and enrichment CAP in bovine serum in combination with high-performance liquid chromatography (HPLC), CAP recovery ranged from 94.1 to 97.9% with relative standard deviations of 0.7–1.5%. This material has broad application prospects in enrichment and separation.

Magnetic Molecularly Imprinted Polymers Based on Poly[2,2’-(p-oxidiphenylene)-5,5’-bibenzimidazole] (OPBI) for Selective Detection of Nonylphenol in Water Samples

2014 ◽  
Vol 1030-1032 ◽  
pp. 112-115 ◽  
Author(s):  
Yan Zhou ◽  
Zheng Ping Wang ◽  
Pan Pan Guo ◽  
Xue Gao
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Water Samples ◽  
Selective Adsorption ◽  
Crosslinking Agent ◽  
Order Model ◽  
Molecularly Imprinted ◽  
Kinetics Of Adsorption ◽  
Imprinted Polymers ◽  
Magnetic Molecularly Imprinted Polymers ◽  
Kinetics Of

Magnetic molecularly imprinted polymers (MMIPs) based on poly [2,2’-(p-oxidiphenylene)-5,5’-bibenzimidazole] (OPBI) composites were synthesized for the selective adsorption and detection of nonylphenol (NP) from water samples. During polymerization, Fe3O4@C was used as supporter and magnetic substance and OPBI not only was used as crosslinking agent but also functional monomer. Morphology of Fe3O4@C and MMIPs were investigated by scanning electron microscopy (SEM). The kinetics of adsorption followed the pseudo-first-order model. Selectivity of MMIPs was further demonstrated through HPLC analysis of the water samples, in which bisphenol A (BPA), phenol, 4-nitrophenol (4-NP) and tetrabromobisphenol (TBBPA) were dissolved respectively. The result showed that MMIPs had more effectively recognition capability of NP than other contrasts.

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