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Nicholls, I. A. & Wiklander, J. G. (2020). Towards Peptide and Protein Recognition by Antibody Mimicking Synthetic Polymers – Background, State of the Art, and Future Outlook. Australian journal of chemistry (Print), 73(4), 300-306
Öppna denna publikation i ny flik eller fönster >>Towards Peptide and Protein Recognition by Antibody Mimicking Synthetic Polymers – Background, State of the Art, and Future Outlook
2020 (Engelska)Ingår i: Australian journal of chemistry (Print), ISSN 0004-9425, E-ISSN 1445-0038, Vol. 73, nr 4, s. 300-306Artikel, forskningsöversikt (Refereegranskat) Published
Abstract [en]

Antibody–peptide/protein interactions are instrumental for many processes in the pharmaceutical and biotechnology industries and as tools for biomedical and biochemical research. The recent development of molecularly imprinted polymer nanoparticles displaying antibody-like recognition of peptides and proteins offers the possibility for substituting antibodies with these robust materials for applications where the structural integrity and function of antibodies is compromised by temperature, pH, solvent, etc. The background to the development of this class of antibody-mimicking material and the state-of-the-art in their synthesis and application is presented in this review.

Nationell ämneskategori
Kemi
Forskningsämne
Kemi, Organisk kemi
Identifikatorer
urn:nbn:se:lnu:diva-93020 (URN)10.1071/CH20020 (DOI)
Tillgänglig från: 2020-03-20 Skapad: 2020-03-20 Senast uppdaterad: 2020-04-15
Kathiravan, S. & Nicholls, I. A. (2019). Cobalt catalyzed (sp2) C-H activation reactions with multi-unsaturated substrates for five-and six-membered nitrogen heterocycle synthesis. In: Orazio A. Attanasi, Pedro Merino & Domenico Spinelli (Ed.), Targets in heterocyclic systems: Chemistry and properties (pp. 363-383). Societa Chimica Italiana, 23
Öppna denna publikation i ny flik eller fönster >>Cobalt catalyzed (sp2) C-H activation reactions with multi-unsaturated substrates for five-and six-membered nitrogen heterocycle synthesis
2019 (Engelska)Ingår i: Targets in heterocyclic systems: Chemistry and properties / [ed] Orazio A. Attanasi, Pedro Merino & Domenico Spinelli, Societa Chimica Italiana , 2019, Vol. 23, s. 363-383Kapitel i bok, del av antologi (Refereegranskat)
Abstract [en]

Cobalt catalysis has become a powerful strategy for the synthesis of biologically important heterocyclic targets. Due to its ready availability and low cost, the use of this transition metal for heterocycles synthesis has been of special interest as witnessed by its use in a growing number of elegant synthesis studies. Herein we summarize recent developments in the synthesis of heterocycles using cobalt oxidative catalysis.

Ort, förlag, år, upplaga, sidor
Societa Chimica Italiana, 2019
Serie
Targets in heterocyclic systems, ISSN 1724-9449 ; 23
Nationell ämneskategori
Organisk kemi
Forskningsämne
Kemi, Organisk kemi
Identifikatorer
urn:nbn:se:lnu:diva-94509 (URN)10.17374/targets.2020.23.363 (DOI)2-s2.0-85081687907 (Scopus ID)9788894952162 (ISBN)
Tillgänglig från: 2020-05-13 Skapad: 2020-05-13 Senast uppdaterad: 2020-05-13Bibliografiskt granskad
Kathiravan, S. & Nicholls, I. A. (2019). Cobalt-Catalyzed Oxidative Annulation of Berizothiophene-[b]-1,1-dioxide through Diastereoselective Double C-H Activation. Organic Letters, 21(24), 9806-9811
Öppna denna publikation i ny flik eller fönster >>Cobalt-Catalyzed Oxidative Annulation of Berizothiophene-[b]-1,1-dioxide through Diastereoselective Double C-H Activation
2019 (Engelska)Ingår i: Organic Letters, ISSN 1523-7060, E-ISSN 1523-7052, Vol. 21, nr 24, s. 9806-9811Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The use of inexpensive base metal catalysis to perform C H activation is an active field of research in organic synthesis. Described herein is a sustainable cobaltcatalyzed diastereoselective oxidative annulation/double C H activation of benzothiophene-[b]-1,1-dioxide with aminoquinolinamides under mild reaction conditions for the synthesis of annulated benzothiophenes.

Ort, förlag, år, upplaga, sidor
American Chemical Society (ACS), 2019
Nationell ämneskategori
Organisk kemi
Forskningsämne
Kemi, Organisk kemi
Identifikatorer
urn:nbn:se:lnu:diva-91026 (URN)10.1021/acs.orglett.9b03158 (DOI)000504805500002 ()31651175 (PubMedID)
Tillgänglig från: 2020-01-20 Skapad: 2020-01-20 Senast uppdaterad: 2020-01-20Bibliografiskt granskad
Kathiravan, S., Suriyanarayanan, S. & Nicholls, I. A. (2019). Electrooxidative Amination of sp2 C–H Bonds: Coupling of Amines with Aryl Amides via Copper Catalysis. Organic Letters, 21(7), 1968-1972
Öppna denna publikation i ny flik eller fönster >>Electrooxidative Amination of sp2 C–H Bonds: Coupling of Amines with Aryl Amides via Copper Catalysis
2019 (Engelska)Ingår i: Organic Letters, ISSN 1523-7060, E-ISSN 1523-7052, Vol. 21, nr 7, s. 1968-1972Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Metal-catalyzed cross-coupling reactions are among the most important transformations in organic synthesis. However, the use of C−H activation for sp2 C−N bond formation remains one of the major challenges in the field of crosscoupling chemistry. Described herein is the first example of the synergistic combination of copper catalysis and electrocatalysis for aryl C−H amination under mild reaction conditions in an atom-and step-economical manner with the liberation of H2 as the sole and benign byproduct.

Ort, förlag, år, upplaga, sidor
American Chemical Society (ACS), 2019
Nationell ämneskategori
Organisk kemi
Forskningsämne
Kemi, Organisk kemi
Identifikatorer
urn:nbn:se:lnu:diva-81882 (URN)10.1021/acs.orglett.9b00003 (DOI)000464247500007 ()30785289 (PubMedID)2-s2.0-85062334838 (Scopus ID)
Tillgänglig från: 2019-04-12 Skapad: 2019-04-12 Senast uppdaterad: 2019-08-29Bibliografiskt granskad
Nilsson, S. M. E., Suriyanarayanan, S., Kathiravan, S., Yli-Kauhaluoma, J., Kotiaho, T. & Nicholls, I. A. (2019). Enantioselective hyperporous molecularly imprinted thin film polymers. RSC Advances, 9(58), 33653-33656
Öppna denna publikation i ny flik eller fönster >>Enantioselective hyperporous molecularly imprinted thin film polymers
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2019 (Engelska)Ingår i: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 9, nr 58, s. 33653-33656Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Significant enantioselective recognition has been achieved through the introduction of long range ordered and highly interconnected 300 nm diameter pores in molecularly imprinted polymer matrices.

Ort, förlag, år, upplaga, sidor
Royal Society of Chemistry, 2019
Nationell ämneskategori
Polymerkemi
Forskningsämne
Kemi, Organisk kemi
Identifikatorer
urn:nbn:se:lnu:diva-90327 (URN)10.1039/c9ra07425b (DOI)000496137600012 ()
Tillgänglig från: 2019-11-29 Skapad: 2019-11-29 Senast uppdaterad: 2019-11-29Bibliografiskt granskad
Mahajan, R., Rouhi, M., Shinde, S., Bedwell, T., Incel, A., Mavliutova, L., . . . Sellergren, B. (2019). Highly Efficient Synthesis and Assay of Protein-Imprinted Nanogels by Using Magnetic Templates. Angewandte Chemie International Edition, 58(3), 727-730
Öppna denna publikation i ny flik eller fönster >>Highly Efficient Synthesis and Assay of Protein-Imprinted Nanogels by Using Magnetic Templates
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2019 (Engelska)Ingår i: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 58, nr 3, s. 727-730Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We report an approach integrating the synthesis of protein-imprinted nanogels ("plastic antibodies") with a highly sensitive assay employing templates attached to magnetic carriers. The enzymes trypsin and pepsin were immobilized on amino-functionalized solgel-coated magnetic nanoparticles (magNPs). Lightly crosslinked fluorescently doped polyacrylamide nanogels were subsequently produced by high-dilution polymerization of monomers in the presence of the magNPs. The nanogels were characterised by a novel competitive fluorescence assay employing identical protein-conjugated nanoparticles as ligands to reversibly immobilize the corresponding nanogels. Both nanogels exhibited K-d<10 pM for their respective target protein and low cross-reactivity with five reference proteins. This agrees with affinities reported for solid-phase-synthesized nanogels prepared using low-surface-area glass-bead supports. This approach simplifies the development and production of plastic antibodies and offers direct access to a practical bioassay.

Ort, förlag, år, upplaga, sidor
Wiley-VCH Verlagsgesellschaft, 2019
Nyckelord
competitive assays, molecularly imprinted polymers, nanogel synthesis, plastic antibodies
Nationell ämneskategori
Organisk kemi
Forskningsämne
Kemi, Organisk kemi
Identifikatorer
urn:nbn:se:lnu:diva-79846 (URN)10.1002/anie.201805772 (DOI)000455033700009 ()30308085 (PubMedID)2-s2.0-85056479757 (Scopus ID)
Forskningsfinansiär
KK-stiftelsen, 20150086KK-stiftelsen, 20170059Vetenskapsrådet, 2014-4573
Anmärkning

Also funded by: Marie Sklodowska-Curie Actions (H2020-MSCA-ITN-2016)  -  722171-Biocapture

Tillgänglig från: 2019-01-24 Skapad: 2019-01-24 Senast uppdaterad: 2019-08-29Bibliografiskt granskad
Suriyanarayanan, S., Olsson, G. D., Kathiravan, S., Ndizeye, N. & Nicholls, I. A. (2019). Non-Ionic Deep Eutectic Liquids: Acetamide-Urea Derived Room Temperature Solvents. International Journal of Molecular Sciences, 20(12), Article ID 2857.
Öppna denna publikation i ny flik eller fönster >>Non-Ionic Deep Eutectic Liquids: Acetamide-Urea Derived Room Temperature Solvents
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2019 (Engelska)Ingår i: International Journal of Molecular Sciences, ISSN 1422-0067, E-ISSN 1422-0067, Vol. 20, nr 12, artikel-id 2857Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A family of non-ionic deep eutectic liquids has been developed based upon mixtures of solid N-alkyl derivatives of urea and acetamide that in some cases have melting points below room temperature. The eutectic behaviour and physical characteristics of a series of eleven eutectic mixtures are presented, along with a molecular dynamics study-supported hypothesis for the origin of the non-ideal mixing of these substances. Their use as solvents in applications ranging from natural product extraction to organic and polymer synthesis are demonstrated.

Ort, förlag, år, upplaga, sidor
MDPI, 2019
Nyckelord
deep-eutectic solvent, flickering cluster, acetamide-urea
Nationell ämneskategori
Organisk kemi
Forskningsämne
Kemi, Organisk kemi
Identifikatorer
urn:nbn:se:lnu:diva-86961 (URN)10.3390/ijms20122857 (DOI)000473756000007 ()31212745 (PubMedID)2-s2.0-85068473566 (Scopus ID)
Tillgänglig från: 2019-07-23 Skapad: 2019-07-23 Senast uppdaterad: 2019-08-29Bibliografiskt granskad
Ndizeye, N., Suriyanarayanan, S. & Nicholls, I. A. (2019). Polymer synthesis in non-ionic deep eutectic solvents. Polymer Chemistry, 10(39), 5289-5295
Öppna denna publikation i ny flik eller fönster >>Polymer synthesis in non-ionic deep eutectic solvents
2019 (Engelska)Ingår i: Polymer Chemistry, ISSN 1759-9954, E-ISSN 1759-9962, Vol. 10, nr 39, s. 5289-5295Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Herein, we report the use of the use of non-ionic deep eutectic solvents (ni-DESs) as porogens in polymer synthesis. Three ni-DES systems, acetamide-N-methylacetamide (AA-NMA), N-methylacetamide-N-methylurea (NMA-NMU) and N-methylacetamide-N,N'-dimethylurea (NMA-NN'DMU), were deployed in the synthesis of a series of cross-linked copolymer monoliths comprised of a functional monomer, methacrylic acid (MAA) or hydroxyethylmethacrylate (HEMA), and a cross-linking monomer, ethylene glycol dimethylacrylate (EGDMA) or divinylbenzene (DVB) or 1,4-bis(acryloyl)piperazine (BAP). Polymers were synthesized under thermally initiated conditions with 2,2'-azobis(2-methylpropionitrile) (AIBN) or 2,2'-azobis(2-amidinopropane) dihydrochloride (ABAH) as an initiator. The resulting polymer monoliths were ground and sieved to yield particles of 63-125 mu m. Corresponding polymers prepared in conventional porogens, acetonitrile, toluene and water were synthesized to serve as controls. The influence of the respective niDESs on polymer morphologies was examined by Brunauer-Emmett-Teller (BET) N2-adsorption, Fourier transform infrared spectroscopy (FT-IR), elemental analysis, scanning electron microscopy (SEM) and zeta potential measurements. The materials displayed surface areas, pore volumes and pore diameters of 115-532 m(2) g(-1), 0.1-1.4 cm(3) g(-1) and 5.2-12.5 nm, generally comparable with those of polymers obtained using conventional solvents, thus presenting these ni-DESs as viable alternatives to conventional organic solvents. The post-polymerization recovery of the ni-DESs (>80%) was demonstrated, highlighting the potential for using these novel liquids as alternatives to conventional, and often more expensive, toxic, flammable or volatile solvents in polymer synthesis.

Ort, förlag, år, upplaga, sidor
Royal Society of Chemistry, 2019
Nationell ämneskategori
Polymerkemi
Forskningsämne
Kemi, Organisk kemi
Identifikatorer
urn:nbn:se:lnu:diva-89808 (URN)10.1039/c9py01039d (DOI)000489265500013 ()
Tillgänglig från: 2019-10-25 Skapad: 2019-10-25 Senast uppdaterad: 2019-10-25Bibliografiskt granskad
Refaat, D., Aggour, M. G., Farghali, A. A., Mahajan, R., Wiklander, J. G., Nicholls, I. A. & Piletsky, S. A. (2019). Strategies for Molecular Imprinting and the Evolution of MIP Nanoparticles as Plastic Antibodies-Synthesis and Applications. International Journal of Molecular Sciences, 20(24), 1-21, Article ID 6304.
Öppna denna publikation i ny flik eller fönster >>Strategies for Molecular Imprinting and the Evolution of MIP Nanoparticles as Plastic Antibodies-Synthesis and Applications
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2019 (Engelska)Ingår i: International Journal of Molecular Sciences, ISSN 1422-0067, E-ISSN 1422-0067, Vol. 20, nr 24, s. 1-21, artikel-id 6304Artikel, forskningsöversikt (Refereegranskat) Published
Abstract [en]

Materials that can mimic the molecular recognition-based functions found in biology are a significant goal for science and technology. Molecular imprinting is a technology that addresses this challenge by providing polymeric materials with antibody-like recognition characteristics. Recently, significant progress has been achieved in solving many of the practical problems traditionally associated with molecularly imprinted polymers (MIPs), such as difficulties with imprinting of proteins, poor compatibility with aqueous environments, template leakage, and the presence of heterogeneous populations of binding sites in the polymers that contribute to high levels of non-specific binding. This success is closely related to the technology-driven shift in MIP research from traditional bulk polymer formats into the nanomaterial domain. The aim of this article is to throw light on recent developments in this field and to present a critical discussion of the current state of molecular imprinting and its potential in real world applications.

Ort, förlag, år, upplaga, sidor
MDPI, 2019
Nyckelord
assay, molecular imprinting, nanoMIP, protein imprinting, sensor, therapeutic agent
Nationell ämneskategori
Biokemi och molekylärbiologi
Forskningsämne
Kemi, Biokemi
Identifikatorer
urn:nbn:se:lnu:diva-91809 (URN)10.3390/ijms20246304 (DOI)000506840100197 ()31847152 (PubMedID)
Tillgänglig från: 2020-02-04 Skapad: 2020-02-04 Senast uppdaterad: 2020-03-20Bibliografiskt granskad
Giovannoli, C., Passini, C., Di Nardo, F., Anfossi, L., Baggiani, C. & Nicholls, I. A. (2018). Affinity Capillary Electrochromatography of Molecularly Imprinted Thin Layers Grafted onto Silica Capillaries Using a Surface-Bound Azo-Initiator and Living Polymerization. Polymers, 10(2), Article ID 192.
Öppna denna publikation i ny flik eller fönster >>Affinity Capillary Electrochromatography of Molecularly Imprinted Thin Layers Grafted onto Silica Capillaries Using a Surface-Bound Azo-Initiator and Living Polymerization
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2018 (Engelska)Ingår i: Polymers, ISSN 2073-4360, E-ISSN 2073-4360, Vol. 10, nr 2, artikel-id 192Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Molecularly imprinted thin layers were prepared in silica capillaries by using two different surface polymerization strategies, the first using 4,4-azobis(4-cyanovaleric acid) as a surface-coupled radical initiator, and the second, S-carboxypropyl-S'-benzyltrithiocarbonate as a reversible addition-fragmentation chain transfer (RAFT) agent in combination with 2,2-azobisisobutyronitrile as a free radical initiator. The ability to generate imprinted thin layers was tested on two different polymerization systems: (i) a 4-vinylpyridine/ethylene dimethacrylate (4VP-EDMA) in methanol-water solution with 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) as a template; and (ii) methacrylic acid/ethylene dimethacrylate (MAA-EDMA) in a chloroform solution with warfarin as the template molecule. The binding properties of the imprinted capillaries were studied and compared with those of the corresponding non-imprinted polymer coated capillaries by injecting the template molecule and by measuring its migration times relative to a neutral and non-retained marker. The role of running buffer hydrophobicity on recognition was investigated by studying the influence of varying buffer acetonitrile concentration. The 2,4,5-T-imprinted capillary showed molecular recognition based on a reversed phase mechanism, with a decrease of the template recognition in the presence of higher acetonitrile content; whereas warfarin-imprinted capillaries showed a bell-shaped trend upon varying the acetonitrile percentage, illustrating different mechanisms underlying imprinted polymer-ligand recognition. Importantly, the results demonstrated the validity of affinity capillary electrochromatography (CEC) to screen the binding properties of imprinted layers.

Ort, förlag, år, upplaga, sidor
MDPI, 2018
Nyckelord
molecularly imprinted polymers, capillary electrophoresis, controlled/living radical polymerization, 2, 4, 5-trichlorophenoxyacedic acid, warfarin
Nationell ämneskategori
Organisk kemi
Forskningsämne
Kemi, Organisk kemi
Identifikatorer
urn:nbn:se:lnu:diva-72298 (URN)10.3390/polym10020192 (DOI)000427542900087 ()2-s2.0-85042197819 (Scopus ID)
Tillgänglig från: 2018-04-10 Skapad: 2018-04-10 Senast uppdaterad: 2019-08-29Bibliografiskt granskad
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0002-0407-6542

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