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Ayadi C, Anene A, Kalfat R, Chevalier Y, Hbaieb S. Molecular Imprints Frozen by Strong Intermolecular Interactions in Place of Cross-Linking. Chemistry 2021; 27:2175-2183. [PMID: 33146917 DOI: 10.1002/chem.202004580] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Indexed: 11/10/2022]
Abstract
A new way to freeze molecular imprints in a polymer material is reported. So far, molecular imprinted polymers (MIP) involve copolymerization of a functional monomer and large amounts of cross-linking agent, which keeps the template shape memory in rigid molecular imprints. MIP materials are prepared herein without cross-linking agent. Stiff chains of polyaniline grafted on a solid support as a brush-like material achieve the necessary rigidity. Differential adsorption to imprinted and non-imprinted materials provides evidence of molecular imprints. A correct adsorption isotherm for mobile adsorbed layers (Volmer isotherm) is introduced instead of the popular but inadequate Langmuir isotherm. Non-selective adsorption is entropic, whereas adsorption to molecular imprints has an enthalpic contribution coming from specific interactions. Fast adsorption kinetics are a definite benefit with regards to applications such as chromatographic separations and chemical sensors.
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Affiliation(s)
- Cherifa Ayadi
- Laboratoire Matériaux, Traitement et Analyse, Institut National de Recherche et d'Analyse Physico-chimique (INRAP), Biotechpole Sidi-Thabet, 2020, Ariana, Tunisia.,Laboratoire d'Automatique, de Génie des Procédés et de Génie, Pharmaceutique (LAGEPP), Université de Lyon 1, UMR 5007 CNRS, 43 bd 11 Novembre, 69622, Villeurbanne, France.,Laboratoire de Recherche: Caractérisations, Applications et Modélisation, de Matériaux,Faculté des Sciences de Tunis, Université Tunis El Manar, Campus Universitaire El Manar, Tunisia
| | - Amira Anene
- Laboratoire Matériaux, Traitement et Analyse, Institut National de Recherche et d'Analyse Physico-chimique (INRAP), Biotechpole Sidi-Thabet, 2020, Ariana, Tunisia
| | - Rafik Kalfat
- Laboratoire Matériaux, Traitement et Analyse, Institut National de Recherche et d'Analyse Physico-chimique (INRAP), Biotechpole Sidi-Thabet, 2020, Ariana, Tunisia
| | - Yves Chevalier
- Laboratoire d'Automatique, de Génie des Procédés et de Génie, Pharmaceutique (LAGEPP), Université de Lyon 1, UMR 5007 CNRS, 43 bd 11 Novembre, 69622, Villeurbanne, France
| | - Souhaira Hbaieb
- Laboratoire Matériaux, Traitement et Analyse, Institut National de Recherche et d'Analyse Physico-chimique (INRAP), Biotechpole Sidi-Thabet, 2020, Ariana, Tunisia.,Laboratoire de Recherche: Caractérisations, Applications et Modélisation, de Matériaux,Faculté des Sciences de Tunis, Université Tunis El Manar, Campus Universitaire El Manar, Tunisia
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Wan W, Descalzo AB, Shinde S, Weißhoff H, Orellana G, Sellergren B, Rurack K. Ratiometric Fluorescence Detection of Phosphorylated Amino Acids Through Excited-State Proton Transfer by Using Molecularly Imprinted Polymer (MIP) Recognition Nanolayers. Chemistry 2017; 23:15974-15983. [PMID: 28869685 DOI: 10.1002/chem.201703041] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Indexed: 12/12/2022]
Abstract
A 2,3-diaminophenazine bis-urea fluorescent probe monomer (1) was developed. It responds to phenylphosphate and phosphorylated amino acids in a ratiometric fashion with enhanced fluorescence accompanied by the development of a redshifted emission band arising from an excited-state proton transfer (ESPT) process in the hydrogen-bonded probe/analyte complex. The two urea groups of 1 form a cleft-like binding pocket (Kb >1010 L2 mol-2 for 1:2 complex). Imprinting of 1 in presence of ethyl ester- and fluorenylmethyloxycarbonyl (Fmoc)-protected phosphorylated tyrosine (Fmoc-pTyr-OEt) as the template, methacrylamide as co-monomer, and ethyleneglycol dimethacrylate as cross-linker gave few-nanometer-thick molecularly imprinted polymer (MIP) shells on silica core microparticles with excellent selectivity for the template in a buffered biphasic assay. The supramolecular recognition features were established by spectroscopic and NMR studies. Rational screening of co-monomers and cross-linkers allowed to single out the best performing MIP components, giving significant imprinting factors (IF>3.5) while retaining ESPT emission and the ratiometric response in the thin polymer shell. Combination of the bead-based detection scheme with the phase-transfer assay dramatically improved the IF to 15.9, allowing sensitive determination of the analyte directly in aqueous media.
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Affiliation(s)
- Wei Wan
- Chemical and Optical Sensing Division, Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Strasse 11, 12489, Berlin, Germany
| | - Ana B Descalzo
- Department of Organic Chemistry, Complutense University of Madrid (UCM), 28040, Madrid, Spain
| | - Sudhirkumar Shinde
- Department of Biomedical Science, Malmö University, 20506, Malmö, Sweden
| | - Hardy Weißhoff
- Department of Chemistry, Humboldt University Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Guillermo Orellana
- Department of Organic Chemistry, Complutense University of Madrid (UCM), 28040, Madrid, Spain
| | - Börje Sellergren
- Department of Biomedical Science, Malmö University, 20506, Malmö, Sweden
| | - Knut Rurack
- Chemical and Optical Sensing Division, Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Strasse 11, 12489, Berlin, Germany
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Zhang Y, Deng C, Liu S, Wu J, Chen Z, Li C, Lu W. Active Targeting of Tumors through Conformational Epitope Imprinting. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412114] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Zhang Y, Deng C, Liu S, Wu J, Chen Z, Li C, Lu W. Active Targeting of Tumors through Conformational Epitope Imprinting. Angew Chem Int Ed Engl 2015; 54:5157-60. [DOI: 10.1002/anie.201412114] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Indexed: 12/18/2022]
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Wan W, Biyikal M, Wagner R, Sellergren B, Rurack K. Sensorische Mikropartikel aus einem Silicatkern und einem molekular geprägten Polymer als Schale mit aufleuchtender Fluoreszenz. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300322] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Wan W, Biyikal M, Wagner R, Sellergren B, Rurack K. Fluorescent Sensory Microparticles that “Light-up” Consisting of a Silica Core and a Molecularly Imprinted Polymer (MIP) Shell. Angew Chem Int Ed Engl 2013; 52:7023-7. [DOI: 10.1002/anie.201300322] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 04/18/2013] [Indexed: 11/12/2022]
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