Preparation of inorganic molecularly imprinted polymers with higher adsorption and selectivity by sol–gel method

2006 ◽  
Vol 836 (1-2) ◽  
pp. 57-62 ◽  
Author(s):  
Hung-Sen Wei ◽  
Yen-Ling Tsai ◽  
Jia-Yi Wu ◽  
Hui Chen
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Sol Gel ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals Molecularly Imprinted Polymers for Gossypol via Sol–Gel, Bulk, and Surface Layer Imprinting—A Comparative Study

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 602 ◽  
Author(s):  
Lulu Wang ◽  
Keke Zhi ◽  
Yagang Zhang ◽  
Yanxia Liu ◽  
Letao Zhang ◽  
...  
Keyword(s):  
Surface Layer ◽  
Adsorption Capacity ◽  
Adsorption Kinetics ◽  
Molecularly Imprinted Polymers ◽  
Sol Gel ◽  
Freundlich Isotherm ◽  
Bulk Polymerization ◽  
Order Kinetic ◽  
Molecularly Imprinted ◽  
Imprinted Polymers

Three gossypol molecularly imprinted polymers (MIPs) were prepared by bulk polymerization (MIP1), surface layer imprinting using silica gel as the support (MIP2), and the sol-gel process (MIP3). The as-prepared MIPs were characterized by SEM and nitrogen adsorption−desorption techniques to study the morphology structure. The adsorption experiments exhibited that MIP1 had adsorption capacity as high as 564 mg·g−1. The MIP2 showed faster adsorption kinetics than MIP1 and MIP3. The adsorption equilibrium could be reached for gossypol in 40 min. A selectivity study showed that the adsorption capacity of MIPs for gossypol was about 1.9 times higher than that of the structurally-similar analogs ellagic acid and 6.6 times higher than that of the quercetin. It was found that the pseudo-second-order kinetic model and the Freundlich isotherm model were more applicable for the adsorption kinetics and adsorption isotherm of gossypol binding onto the MIP1 and MIP2, respectively. Results suggested that among those three, the MIP2 was a desirable sorbent for rapid adsorption and MIP1 was suitable for selective recognition of gossypol.

scholarly journals Fluorescent Nanosensor based on Molecularly Imprinted Polymers Coated on Graphene Quantum Dots for Fast Detection of Antibiotics

2018 ◽  
Author(s):  
Tongchang Zhou ◽  
Arnab Halder ◽  
Yi Sun
Keyword(s):  
Quantum Dots ◽  
Fluorescence Intensity ◽  
Molecularly Imprinted Polymers ◽  
Limit Of Detection ◽  
Sol Gel ◽  
Graphene Quantum Dots ◽  
Carboxyl Groups ◽  
One Pot ◽  
Molecularly Imprinted ◽  
Imprinted Polymers

In this work, we firstly explored a mild, clean, and highly efficient approach for the synthesis of graphene quantum dots (GQDs). GQDs with carboxyl groups or amino groups, were prepared from one-pot environmentally friendly method assisted by hydrogen peroxide, respectively. It was proved that carboxyl groups played an important role in the fluorescence quenching. Based on these findings, we developed a novel fluorescent nanosensor by combining molecularly imprinted polymers (MIPs) with carboxyl functionalized GQDs for the determination of tetracycline (TC) in aqueous samples. The nanocomposite was prepared using a sol-gel process. GQDs-MIPs showed strong fluorescent emission at 410 nm when excited at 360 nm, which was subsequently quenched in the presence of TC. Under optimum conditions, the fluorescence intensity of GQDs-MIPs decreased in response to the increase of TC concentration with good linearity rage of 1.0-104 µg L-1. The limit of detection was determined to be 1 µg L-1. The fluorescence intensity of GQDs-MIPs was more strongly quenched by TC compared to the corresponding non-imprinted polymers, GQDs-NIPs. With the high sensitivity, the material was also successfully worked for the detection of TC in real spiked milk samples.

scholarly journals Recent Applications of Molecularly Imprinted Sol-Gel Methodology in Sample Preparation

Molecules ◽  
2019 ◽  
Vol 24 (16) ◽  
pp. 2889 ◽  
Author(s):  
Mohammad Mahdi Moein ◽  
Abbi Abdel-Rehim ◽  
Mohamed Abdel-Rehim
Keyword(s):  
Sample Preparation ◽  
Molecularly Imprinted Polymers ◽  
Mechanical Stability ◽  
Sol Gel ◽  
High Capacity ◽  
Promising Alternative ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Molecularly Imprinted Technology ◽  
Stability Issues

Due to their selectivity and chemical stability, molecularly imprinted polymers have attracted great interest in sample preparation. Imprinted polymers have been applied for the extraction and the enrichment of different sorts of trace analytes in biological and environmental samples before their analysis. Additionally, MIPs are utilized in various sample preparation techniques such as SPE, SPME, SBSE and MEPS. Nevertheless, molecularly imprinted polymers suffer from thermal (stable only up to 150 °C) and mechanical stability issues, improper porosity and poor capacity. The sol-gel methodology as a promising alternative to address these limitations allowing the production of sorbents with controlled porosity and higher surface area. Thus the combination of molecularly imprinted technology and sol-gel technology can create influential materials with high selectivity, high capacity and high thermal stability. This work aims to present an overview of molecularly imprinted sol-gel polymerization methods and their applications in analytical and bioanalytical fields.

Electrochemical impedimetric sensor based on molecularly imprinted polymers/sol–gel chemistry for methidathion organophosphorous insecticide recognition

Talanta ◽  
2014 ◽  
Vol 130 ◽  
pp. 294-298 ◽  
Author(s):  
Idriss Bakas ◽  
Akhtar Hayat ◽  
Sergey Piletsky ◽  
Elena Piletska ◽  
Mohamed M. Chehimi ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Sol Gel ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Organophosphorous Insecticide

scholarly journals Separation of ‎STIGMA STEROL using magnetic molecularly imprinted nanopolymer fabricated by sol-gel method

2017 ◽  
Vol 28 (4) ◽  
pp. 44-53 ◽  
Author(s):  
Ehsan Moghaddas Kia ◽  
Mohammad Alizadeh ◽  
Mohammad Reza Vardast ◽  
Mahmoud Rezazad ◽  
◽  
...  
Keyword(s):  
Sol Gel ◽  
Molecularly Imprinted ◽  
Gel Method ◽  
Sol Gel Method
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