1
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Calik F, Degirmenci A, Maouati H, Sanyal R, Sanyal A. Redox-Responsive "Catch and Release" Cryogels: A Versatile Platform for Capture and Release of Proteins and Cells. ACS Biomater Sci Eng 2024; 10:3017-3028. [PMID: 38655791 DOI: 10.1021/acsbiomaterials.4c00239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Macroporous cryogels are attractive scaffolds for biomedical applications, such as biomolecular immobilization, diagnostic sensing, and tissue engineering. In this study, thiol-reactive redox-responsive cryogels with a porous structure are prepared using photopolymerization of a pyridyl disulfide poly(ethylene glycol) methacrylate (PDS-PEG-MA) monomer. Reactive cryogels are produced using PDS-PEG-MA and hydrophilic poly(ethylene glycol) methyl ether methacrylate (PEGMEMA) monomers, along with a PEG-based cross-linker and photoinitiator. Functionalization of cryogels using a fluorescent dye via the disulfide-thiol exchange reactions is demonstrated, followed by release under reducing conditions. For ligand-mediated protein immobilization, first, thiol-containing biotin or mannose is conjugated onto the cryogels. Subsequently, fluorescent dye-labeled proteins streptavidin and concanavalin A (ConA) are immobilized via ligand-mediated conjugation. Furthermore, we demonstrate that the mannose-decorated cryogel could capture ConA selectively from a mixture of lectins. The efficiency of protein immobilization could be easily tuned by changing the ratio of the thiol-sensitive moiety in the scaffold. Finally, an integrin-binding cell adhesive peptide is attached to cryogels to achieve successful attachment, and the on-demand detachment of integrin-receptor-rich fibroblast cells is demonstrated. Redox-responsive cryogels can serve as potential scaffolds for a variety of biomedical applications because of their facile synthesis and modification.
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Affiliation(s)
- Filiz Calik
- Department of Chemistry, Bogazici University, Istanbul 34342, Türkiye
| | - Aysun Degirmenci
- Department of Chemistry, Bogazici University, Istanbul 34342, Türkiye
| | - Hamida Maouati
- Department of Chemistry, Bogazici University, Istanbul 34342, Türkiye
| | - Rana Sanyal
- Department of Chemistry, Bogazici University, Istanbul 34342, Türkiye
- Center for Life Sciences and Technologies, Bogazici University, Istanbul 34342, Türkiye
| | - Amitav Sanyal
- Department of Chemistry, Bogazici University, Istanbul 34342, Türkiye
- Center for Life Sciences and Technologies, Bogazici University, Istanbul 34342, Türkiye
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2
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Behera P, Karunakaran S, Sahoo J, Bhatt P, Rana S, De M. Ligand Exchange on MoS 2 Nanosheets: Applications in Array-Based Sensing and Drug Delivery. ACS NANO 2022; 17:1000-1011. [PMID: 36482513 DOI: 10.1021/acsnano.2c06994] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Two-dimensional MoS2 nanosheets (2D-MoS2) have been widely used in many biological applications due to their distinctive physicochemical properties. Further, the development of surface modification using thiolated ligands allows us to use them for many specific applications. But the effect of possible ligand exchange on 2D-MoS2 has never been explored, which can play an important role in diverse biological applications. In this study, we have observed the ligand-exchange phenomenon on 2D-MoS2 in the presence of different thiolated ligands. The initial study proceeded with boron-dipyrromethene (BODIPY) functionalized MoS2 with different concentrations of glutathione (GSH), which is the most abundant thiol species in the cytoplasm of various cancer cells. It was found that in the presence of GSH the fluorescence of BODIPY can be regenerated, which is time and concentration dependent. We have also examined this phenomenon with different thiol ligands and transition-metal dichalcogenides (TMDs). We observed a variable rate of ligand exchange in different solvents, surface functionality, and receptor environments that helped us to construct sensor arrays. Interestingly, a ligand-exchange process was not observed in the presence of dithiols. Further, this concept was applied to a cancerous cell line for in vitro delivery. We found that BODIPY-functionalized 2D-MoS2 undergoes thiol exchange by intracellular GSH and subsequently enhanced the fluorescence in the cytoplasm of cancer cells. This strategy can be applied to the development of 2D-TMD-based materials for various biological applications related to ligand exchange.
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Affiliation(s)
- Pradipta Behera
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Subbaraj Karunakaran
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Jagabandhu Sahoo
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Preeti Bhatt
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Subinoy Rana
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Mrinmoy De
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
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3
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Le HTN, Phan LMT, Cho S. Removal of Thiol-SAM on a Gold Surface for Re-Use of an Interdigitated Chain-Shaped Electrode. MATERIALS 2022; 15:ma15062218. [PMID: 35329670 PMCID: PMC8950519 DOI: 10.3390/ma15062218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/07/2022] [Accepted: 03/15/2022] [Indexed: 11/16/2022]
Abstract
The self-assembled monolayer (SAM) is the most common organic assembly utilized for the formation of the monolayers of alkane-thiolates on gold electrode, resulting in a wide range of applications for the modified SAM on gold in various research areas. This study examined the desorption of a SAM that was developed on the gold surface of an interdigitated chain-shaped electrode (the ICE, a unique electrode design, was fabricated by our group) with the goal of determining the most efficient strategy of SAM removal for the ICE to be re-used. A simple and proficient solution-based cleaning procedure was applied for the removal of a SAM on the gold surface of the ICE by using a sodium borohydride solution within short-term treatment, resulting in efficiency for the recovery of the originally electrochemical characteristic of ICE of 90.3%. The re-use of ICE after the removal process was confirmed by the successful re-deposition of a SAM onto the electrode surface, resulting in the high efficiency percentage of 90.1% for the reusability of ICE with the SAM modification. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were used as tools to investigate the changes in the electrode interface at each stage of the SAM removal and the electrode recycling. X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were employed, being powerful spectrum techniques, for the characterization of the bonding structure and chemical state of the bare ICE and the modified ICE at each treatment step. Based on the comprehensive discussion of analytical chemistry from the obtained EIS and CV data in this study, we confirmed and proved the effectiveness of this promising method for the removal of a SAM from the ICE and the re-use of ICE in the field of material deposition, with the aims of saving money, improving experimental handling, and protecting the environment.
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Affiliation(s)
- Hien T. Ngoc Le
- Department of Electronic Engineering, Gachon University, Seongnam-si 13120, Korea;
| | - Le Minh Tu Phan
- School of Medicine and Pharmacy, The University of Danang, Danang 550000, Vietnam;
| | - Sungbo Cho
- Department of Electronic Engineering, Gachon University, Seongnam-si 13120, Korea;
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21999, Korea
- Correspondence: ; Tel.: +82-(31)-750-5321
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Degirmenci A, Sanyal R, Arslan M, Sanyal A. Benzothiazole-disulfide based redox-responsive polymers: facile access to reversibly functionalizable polymeric coatings. Polym Chem 2022. [DOI: 10.1039/d2py00133k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Redox-responsive polymers and polymeric coatings containing benzothiazole-disulfide groups provide facile access to reversibly functionalizable platforms.
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Affiliation(s)
- Aysun Degirmenci
- Department of Chemistry, Bogazici University, Bebek, Istanbul, 34342, Turkey
| | - Rana Sanyal
- Department of Chemistry, Bogazici University, Bebek, Istanbul, 34342, Turkey
- Center for Life Sciences and Technologies, Bogazici University, Istanbul, Turkey
| | - Mehmet Arslan
- Department of Polymer Materials Engineering, Faculty of Engineering, Yalova University, Yalova 77200, Turkey
| | - Amitav Sanyal
- Department of Chemistry, Bogazici University, Bebek, Istanbul, 34342, Turkey
- Center for Life Sciences and Technologies, Bogazici University, Istanbul, Turkey
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5
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Guille-Collignon M, Delacotte J, Lemaître F, Labbé E, Buriez O. Electrochemical Fluorescence Switch of Organic Fluorescent or Fluorogenic Molecules. CHEM REC 2021; 21:2193-2202. [PMID: 33656794 DOI: 10.1002/tcr.202100022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 02/18/2021] [Accepted: 02/18/2021] [Indexed: 12/27/2022]
Abstract
This short review is aimed at emphasizing the most prominent recent works devoted to the fluorescence modulation of organic fluorescent or fluorogenic molecules by electrochemistry. This still expanding research field not only addresses the smart uses of known molecules or the design of new ones, but also investigates the development of instrumentation providing time- and space-resolved information at the molecular level. Important considerations including fluorescent/fluorogenic probes, reversible/irreversible fluorescence switch, direct/indirect fluorescence modulation, or environment properties are especially scrutinized in recent works dealing with bioanalysis perspectives.
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Affiliation(s)
- Manon Guille-Collignon
- PASTEUR, Département de Chimie, Ecole Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Jérôme Delacotte
- PASTEUR, Département de Chimie, Ecole Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Frédéric Lemaître
- PASTEUR, Département de Chimie, Ecole Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Eric Labbé
- PASTEUR, Département de Chimie, Ecole Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Olivier Buriez
- PASTEUR, Département de Chimie, Ecole Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
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6
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Gevrek TN, Degirmenci A, Sanyal R, Sanyal A. Multifunctional and Transformable 'Clickable' Hydrogel Coatings on Titanium Surfaces: From Protein Immobilization to Cellular Attachment. Polymers (Basel) 2020; 12:E1211. [PMID: 32466521 PMCID: PMC7362003 DOI: 10.3390/polym12061211] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 05/23/2020] [Accepted: 05/24/2020] [Indexed: 02/03/2023] Open
Abstract
Multifunctionalizable hydrogel coatings on titanium interfaces are useful in a wide range of biomedical applications utilizing titanium-based materials. In this study, furan-protected maleimide groups containing multi-clickable biocompatible hydrogel layers are fabricated on a titanium surface. Upon thermal treatment, the masked maleimide groups within the hydrogel are converted to thiol-reactive maleimide groups. The thiol-reactive maleimide group allows facile functionalization of these hydrogels through the thiol-maleimide nucleophilic addition and Diels-Alder cycloaddition reactions, under mild conditions. Additionally, the strained alkene unit in the furan-protected maleimide moiety undergoes radical thiol-ene reaction, as well as the inverse-electron-demand Diels-Alder reaction with tetrazine containing molecules. Taking advantage of photo-initiated thiol-ene 'click' reactions, we demonstrate spatially controlled immobilization of the fluorescent dye thiol-containing boron dipyrromethene (BODIPY-SH). Lastly, we establish that the extent of functionalization on hydrogels can be controlled by attachment of biotin-benzyl-tetrazine, followed by immobilization of TRITC-labelled ExtrAvidin. Being versatile and practical, we believe that the described multifunctional and transformable 'clickable' hydrogels on titanium-based substrates described here can find applications in areas involving modification of the interface with bioactive entities.
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Affiliation(s)
- Tugce Nihal Gevrek
- Department of Chemistry, Bogazici University, Bebek, Istanbul 34342, Turkey; (T.N.G.); (R.S.)
| | - Aysun Degirmenci
- Center for Life Sciences and Technologies, Bogazici University, Istanbul 34342, Turkey;
| | - Rana Sanyal
- Department of Chemistry, Bogazici University, Bebek, Istanbul 34342, Turkey; (T.N.G.); (R.S.)
- Center for Life Sciences and Technologies, Bogazici University, Istanbul 34342, Turkey;
| | - Amitav Sanyal
- Department of Chemistry, Bogazici University, Bebek, Istanbul 34342, Turkey; (T.N.G.); (R.S.)
- Center for Life Sciences and Technologies, Bogazici University, Istanbul 34342, Turkey;
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7
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Cengiz N, Gevrek TN, Sanyal R, Sanyal A. Fabrication of Patterned Hydrogel Interfaces: Exploiting the Maleimide Group as a Dual Purpose Handle for Cross-Linking and Bioconjugation. Bioconjug Chem 2020; 31:1382-1391. [PMID: 32259431 DOI: 10.1021/acs.bioconjchem.0c00108] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Functional hydrogels that can be obtained through facile fabrication procedures and subsequently modified using straightforward reagent-free methods are indispensable materials for biomedical applications such as sensing and diagnostics. Herein a novel hydrogel platform is obtained using polymeric precursors containing the maleimide functional group as a side chain. The maleimide groups play a dual role in fabrication of functional hydrogels. They enable photochemical cross-linking of the polymers to yield bulk and patterned hydrogels. Moreover, the maleimide group can be used as a handle for efficient functionalization using the thiol-maleimide conjugation and Diels-Alder cycloaddition click reactions. Obtained hydrogels are characterized in terms of their morphology, water uptake capacity, and functionalization. Micropatterned hydrogels are obtained under UV-irradiation using a photomask to obtain reactive micropatterns, which undergo facile functionalization upon treatment with thiol-containing functional molecules such as fluorescent dyes and bioactive ligands. The maleimide group also undergoes conjugation through the Diels-Alder reaction, where the attached molecule can be released through thermal treatment via the retro Diels-Alder reaction. The antibiofouling nature of these hydrogel micropatterns enables efficient ligand-directed biomolecular immobilization, as demonstrated by attachment of streptavidin-coated quantum dots.
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Affiliation(s)
- Nergiz Cengiz
- Department of Chemistry, Bogazici University, Bebek 34342, Istanbul, Turkey
| | - Tugce Nihal Gevrek
- Department of Chemistry, Bogazici University, Bebek 34342, Istanbul, Turkey
| | - Rana Sanyal
- Department of Chemistry, Bogazici University, Bebek 34342, Istanbul, Turkey.,Center for Life Sciences and Technologies, Bogazici University, 34342, Istanbul, Turkey
| | - Amitav Sanyal
- Department of Chemistry, Bogazici University, Bebek 34342, Istanbul, Turkey.,Center for Life Sciences and Technologies, Bogazici University, 34342, Istanbul, Turkey
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8
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Shepherd JL, Clément J, McGillivary L. Friction titration measurements of electrochemically generated mixed alkylthiol monolayers on polycrystalline gold. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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9
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DiScenza DJ, Lynch J, Verderame M, Smith MA, Levine M. Cyclodextrin-Promoted Fluorescence Detection of Aromatic Toxicants and Toxicant Metabolites in Commercial Milk Products. FOOD ANAL METHOD 2018; 11:2419-2430. [PMID: 30288206 PMCID: PMC6166478 DOI: 10.1007/s12161-018-1228-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 03/06/2018] [Indexed: 11/28/2022]
Abstract
The detection of polycyclic aromatic hydrocarbons (PAHs) and their metabolites in food and in agricultural sources is an important research objective due to the PAHs' known persistence, carcinogenicity, and toxicity. PAHs have been found in the milk of lactating cows, and in the leaves and stems of plants grown in PAH-contaminated areas, thereby making their way into both cow milk and plant milk alternatives. Reported herein is the rapid, sensitive, and selective detection of 10 PAHs and PAH metabolites in a variety of cow milks and plant milk alternatives using fluorescence energy transfer from the PAH to a high quantum yield fluorophore, combined with subsequent array-based statistical analyses of the fluorescence emission signals. This system operates with high sensitivity (low micromolar detection limits), selectivity (100% differentiation even between structurally similar analytes), and general applicability (for both unmodified lipophilic PAHs and highly polar oxidized PAH metabolites, as well as for different cow and plant milk samples). These promising results show significant potential to be translated into solid-state devices for the rapid, sensitive, and selective detection of PAHs and their metabolites in complex, commercial food products.
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Affiliation(s)
| | | | | | | | - Mindy Levine
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, RI 02881 ; 401-874-4243
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10
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Arno MC, Brannigan RP, Policastro GM, Becker ML, Dove AP. pH-Responsive, Functionalizable Spyrocyclic Polycarbonate: A Versatile Platform for Biocompatible Nanoparticles. Biomacromolecules 2018; 19:3427-3434. [PMID: 29927242 DOI: 10.1021/acs.biomac.8b00744] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Polymeric nanoparticles are widely investigated to enhance the selectivity of therapeutics to targeted sites, as well as to increase circulation lifetime and water solubility of poorly soluble drugs. In contrast to the encapsulation of the cargo into the nanostructures, the conjugation directly to the polymer backbone allows better control on the loading and selective triggered release. In this work we report a simple procedure to create biodegradable polycarbonate graft copolymer nanoparticles via a ring opening polymerization and subsequent postpolymerization modification strategies. The polymer, designed with both pH-responsive acetal linkages and a norbornene group, allows for highly efficient postpolymerization modifications through a range of chemistries to conjugate imaging agents and solubilizing arms to direct self-assembly. To demonstrate the potential of this approach, polycarbonate-based nanoparticles were tested for biocompatibility and their ability to be internalized in A549 and IMR-90 cell lines.
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Affiliation(s)
- Maria C Arno
- School of Chemistry , University of Birmingham , Edgbaston, Birmingham , B15 2TT , United Kingdom
| | - Ruairí P Brannigan
- Department of Chemistry , The University of Warwick , Gibbet Hill Road , Coventry CV4 7AL , United Kingdom
| | | | | | - Andrew P Dove
- School of Chemistry , University of Birmingham , Edgbaston, Birmingham , B15 2TT , United Kingdom
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11
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DiScenza DJ, Smith MA, Intravaia LE, Levine M. Efficient Detection of Phthalate Esters in Human Saliva via Fluorescence Spectroscopy. ANAL LETT 2018. [DOI: 10.1080/00032719.2018.1471086] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Dana J. DiScenza
- Department of Chemistry, University of Rhode Island, Kingston, RI, USA
| | - Melissa A. Smith
- Department of Chemistry, University of Rhode Island, Kingston, RI, USA
| | | | - Mindy Levine
- Department of Chemistry, University of Rhode Island, Kingston, RI, USA
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12
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Determining the parameters governing the electrochemical stability of thiols and disulfides self-assembled monolayer on gold electrodes in physiological medium. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.07.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Gevrek TN, Cosar M, Aydin D, Kaga E, Arslan M, Sanyal R, Sanyal A. Facile Fabrication of a Modular "Catch and Release" Hydrogel Interface: Harnessing Thiol-Disulfide Exchange for Reversible Protein Capture and Cell Attachment. ACS APPLIED MATERIALS & INTERFACES 2018; 10:14399-14409. [PMID: 29637775 DOI: 10.1021/acsami.8b00802] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Surfaces engineered to "specifically capture" and "release on demand" analytes ranging from biomolecules to cells find niche applications in areas such as diagnostics and detection. Utilization of a disulfide-based linker as a building block allows fabrication of a novel hydrogel-based platform that incorporates a "catch and release" attribute. Hydrogels incorporating pyridyl disulfide groups as thiol-reactive handles were prepared by photopolymerization in the presence of a poly(ethylene glycol) (PEG)-based cross-linker. A range of bulk and micropatterned hydrogels with varying amounts of the reactive group were prepared using PEG-based monomers with different chain lengths. Thiol-containing molecules were conjugated to these hydrogels through the thiol-disulfide exchange reaction under ambient conditions with high efficiencies, as determined by UV-vis spectroscopy. Facile conjugation of a thiol-containing fluorescent dye, namely 4,4-difluoro-1,3,5,7-tetramethyl-8-[(10-mercapto)]-4-bora-3 a,4 a-diaza- s-indacene, was demonstrated, followed by its effective cleavage in the presence of dithiothreitol (DTT), a thiol-containing disulfide-reducing agent. Conjugation of a biotin-containing ligand onto the hydrogels allowed specific binding of protein extravidin when exposed to a mixture of extravidin and bovine serum albumin. The bound protein could be released from the hydrogel by simple exposure to a DTT solution. Likewise, hydrogels modified with a cell-adhesive peptide unit containing the RGD sequence acted as favorable substrates for cellular attachment. Incubation of these cell-attached hydrogel surfaces in a DTT-containing solution leads to facile detachment of cells from the surfaces, while retaining a high level of cell viability. It can be envisioned that the benign nature of these hydrogels, their facile fabrication, and modular functionalization will make them attractive platforms for many applications.
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14
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Leung KK, Gaxiola AD, Yu HZ, Bizzotto D. Tailoring the DNA SAM surface density on different surface crystallographic features using potential assisted thiol exchange. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.12.114] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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DiScenza DJ, Lynch J, Miller J, Verderame M, Levine M. Detection of Organochlorine Pesticides in Contaminated Marine Environments via Cyclodextrin-Promoted Fluorescence Modulation. ACS OMEGA 2017; 2:8591-8599. [PMID: 30023587 PMCID: PMC6044669 DOI: 10.1021/acsomega.7b00991] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 11/03/2017] [Indexed: 06/08/2023]
Abstract
The development of practical and robust detection methods for pesticides is an important research objective owing to the known toxicity, carcinogenicity, and environmental persistence of these compounds. Pesticides have been found in bodies of water that are located near areas where pesticides are commonly used and easily spread to beaches, lakes, and rivers; affect the species living in those waterways; and harm humans who come into contact with or eat fish from such water. Reported herein is the rapid, sensitive, and selective detection of four organochlorine pesticides in a variety of water sources across the state of Rhode Island using cyclodextrin-promoted fluorescence detection. This method relies on the ability of cyclodextrin to promote analyte-specific fluorescence modulation of a high quantum yield fluorophore when a pesticide is in close proximity, combined with subsequent array-based statistical analyses of the measurable changes in the emission signals. This system operates with high sensitivity (low micromolar detection limits), selectivity (100% differentiation between structurally similar analytes), and general applicability (for different water samples with varying salinity and pH as well as for different water temperatures).
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Affiliation(s)
- Dana J. DiScenza
- Department of Chemistry, University
of Rhode Island, 140
Flagg Road, Kingston, Rhode
Island 02881, United
States
| | - Julie Lynch
- Department of Chemistry, University
of Rhode Island, 140
Flagg Road, Kingston, Rhode
Island 02881, United
States
| | - Jasmine Miller
- Department of Chemistry, University
of Rhode Island, 140
Flagg Road, Kingston, Rhode
Island 02881, United
States
| | - Molly Verderame
- Department of Chemistry, University
of Rhode Island, 140
Flagg Road, Kingston, Rhode
Island 02881, United
States
| | - Mindy Levine
- Department of Chemistry, University
of Rhode Island, 140
Flagg Road, Kingston, Rhode
Island 02881, United
States
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16
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Impact of gold-1-decanethiol-SAM formation and removal cycles on the surface properties of polycrystalline gold and SAM quality. J Solid State Electrochem 2017. [DOI: 10.1007/s10008-017-3858-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Towards Rational Chemosensor Design through Improved Understanding of Experimental Parameter Variation and Tolerance in Cyclodextrin-Promoted Fluorescence Detection. CHEMOSENSORS 2017. [DOI: 10.3390/chemosensors5040034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We have previously developed a highly efficient fluorescence-based toxicant-detection method that operates in complex environments to detect aromatic toxicants and toxicant metabolites with high sensitivity and selectivity. This method relies on the ability of γ-cyclodextrin to act as a supramolecular scaffold, and uses a variety of non-covalent interactions between the cyclodextrin, toxicant, and fluorophore to enable efficient detection. Reported herein is an investigation of the effect of various experimental parameters, including host concentration, temperature, pH, salt, and solvent, on the observed energy-transfer efficiencies. These results advance our understanding of γ-cyclodextrin-based association complexes and provide crucial information for the development of fluorescence-based sensors using such complexation and the resultant fluorescence-based detection.
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18
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Fisher EA, Leung KK, Casanova-Moreno J, Masuda T, Young J, Bizzotto D. Quantifying the Selective Modification of Au(111) Facets via Electrochemical and Electroless Treatments for Manipulating Gold Nanorod Surface Composition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:12887-12896. [PMID: 29058912 DOI: 10.1021/acs.langmuir.7b03021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Manipulating the composition of a mixed alkylthiol self-assembled monolayer (SAM) modified gold surface using both electrochemical and electroless methods is demonstrated. Through the use of fluorophore labeled thiolated DNA and in situ fluorescence microscopy with a gold single crystal bead electrode, a procedure was developed to study and quantify the selective desorption of an alkylthiolate SAM. This method enabled a self-consistent measurement of the removal of the SAM from the 111 surface compared to the 100 surface region at various potentials. A 20-fold increase in the electrochemical removal and replacement of the SAM from the 111 surface over the 100 surface was realized at -0.8 V/AgAgCl. A related procedure was developed for the solution-based electroless removal of the SAM using NaBH4 achieving a similar selectivity at the same potential. Unfortunately, in the electroless process fine control over the reducing potential was difficult to achieve. In addition, working in the presence of O2 complicates the solution potential measurement due to depolarization by the reduction of O2, resulting in a less clear relationship between selectivity and measured solution potential. Interestingly, the electrochemical method was not disturbed by the presence of O2. In preparation for work with Au nanorods, electrochemical measurements were performed in electrolyte that included 1 mM CTAB and was found to not interfere with this method. Preliminary results are promising for using this methodology for treatment of acid-terminated alkylthiol modified Au nanorods.
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Affiliation(s)
- Elizabeth A Fisher
- AMPEL, ‡Department of Chemistry, and §Department of Physics and Astronomy, University of British Columbia , Vancouver, BC V6T 1Z4, Canada
| | - Kaylyn K Leung
- AMPEL, ‡Department of Chemistry, and §Department of Physics and Astronomy, University of British Columbia , Vancouver, BC V6T 1Z4, Canada
| | - Jannu Casanova-Moreno
- AMPEL, ‡Department of Chemistry, and §Department of Physics and Astronomy, University of British Columbia , Vancouver, BC V6T 1Z4, Canada
| | - Tamiko Masuda
- AMPEL, ‡Department of Chemistry, and §Department of Physics and Astronomy, University of British Columbia , Vancouver, BC V6T 1Z4, Canada
| | - Jeff Young
- AMPEL, ‡Department of Chemistry, and §Department of Physics and Astronomy, University of British Columbia , Vancouver, BC V6T 1Z4, Canada
| | - Dan Bizzotto
- AMPEL, ‡Department of Chemistry, and §Department of Physics and Astronomy, University of British Columbia , Vancouver, BC V6T 1Z4, Canada
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19
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Gevrek TN, Kosif I, Sanyal A. Surface-Anchored Thiol-Reactive Soft Interfaces: Engineering Effective Platforms for Biomolecular Immobilization and Sensing. ACS APPLIED MATERIALS & INTERFACES 2017; 9:27946-27954. [PMID: 28745494 DOI: 10.1021/acsami.7b07779] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Fabrication of antibiofouling, specifically reactive polymeric coatings that undergo facile functionalization with thiol-bearing small molecules and ligands, yields effective platforms for biomolecular immobilization and sensing. Poly(ethylene glycol) (PEG)-based copolymers containing alkoxysilyl groups to enable surface-anchoring and furan-protected maleimide groups as latent thiol-reactive moieties as side-chains were synthesized. Reactive interfaces were obtained by coating these copolymers onto Si/SiO2 or glass surfaces and activating the maleimide groups to their thiol-reactive forms via thermal treatment. A series of surfaces modified with copolymers containing varying amounts of maleimide groups were synthesized. Effectiveness of surface modification was probed using Fourier transform infrared spectroscopy, contact angle goniometry, ellipsometry and X-ray photoelectron spectroscopy. Facile surface modification through thiol-maleimide conjugation was established by attachment of a thiol-containing fluorescent dye, namely BODIPY-SH. It was demonstrated that these surfaces allow spatially localized modification through microcontact printing. Importantly, the extent of surface modification could be tuned by varying the initial composition of the copolymer used for coating. Using fluorescence microscopy, it was observed that increasing amount of fluorescent dye was attached onto surfaces fabricated with copolymers with increasing amount of masked maleimide groups. Thereafter, the thiol-maleimide conjugation was utilized to decorate these surfaces with biotin, a protein-binding ligand. It was observed that though these biotinylated surfaces were able to bind Streptavidin effectively, some nonspecific binding was observed on places that were not in conformal contact with the stamp during microcontact printing. This nonspecific binding was eliminated upon neutralizing the residual maleimide units on the printed surface using thiol-containing PEG. Notably, fluorescence analysis of Streptavidin immobilized onto biotinylated surfaces fabricated using varying amounts of maleimide demonstrated that the amount of immobilized protein could be tuned by varying surface composition. It can be envisioned that facile fabrication of these maleimide-containing polymeric surfaces, their effective functionalization in a tunable manner to engineer interfaces for effective immobilization or sensing of biomolecules in a spatially controlled manner would make them attractive candidates for various biotechnological applications.
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Affiliation(s)
- Tugce Nihal Gevrek
- Department of Chemistry, Bogazici University , Bebek, Istanbul 34342, Turkey
| | - Irem Kosif
- Department of Chemistry, Bogazici University , Bebek, Istanbul 34342, Turkey
| | - Amitav Sanyal
- Department of Chemistry, Bogazici University , Bebek, Istanbul 34342, Turkey
- Center for Life Sciences and Technologies, Bogazici University , Bebek, Istanbul 34342, Turkey
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20
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Gok O, Erturk P, Sumer Bolu B, Gevrek TN, Sanyal R, Sanyal A. Dendrons and Multiarm Polymers with Thiol-Exchangeable Cores: A Reversible Conjugation Platform for Delivery. Biomacromolecules 2017. [PMID: 28648044 DOI: 10.1021/acs.biomac.7b00619] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Disulfide exchange reaction has emerged as a powerful tool for reversible conjugation of proteins, peptides and thiol containing molecules to polymeric supports. In particular, the pyridyl disulfide group provides an efficient handle for the site-specific conjugation of therapeutic peptides and proteins bearing cysteine moieties. In this study, novel biodegradable dendritic platforms containing a pyridyl disulfide unit at their focal point were designed. Presence of hydroxyl groups at the periphery of these dendrons allows their elaboration to multivalent initiators that yield poly(ethylene glycol) based multiarm star polymers via controlled radical polymerization. The pyridyl disulfide unit at the core of these star polymers undergoes efficient reaction with thiol functional group containing molecules such as a hydrophobic dye, namely, Bodipy-SH, glutathione, and KLAK sequence containing peptide. While conjugation of the hydrophobic fluorescent dye to the PEG-based multiarm polymer renders it water-soluble, it can be cleaved off the construct through thiol-disulfide exchange in the presence of an external thiol such as dithiothreitol. The multiarm polymer was conjugated with a thiol group containing apoptotic peptide to increase its solubility and cellular transport. In vitro cytotoxicity and apoptosis assays demonstrated that the resultant peptide-polymer conjugate had almost five times more apoptotic potential primarily through triggering apoptosis by disrupting mitochondrial membranes of human breast cancer cell line (MDA-MB-231) compared to naked peptide. The novel dendritic platform disclosed here offers an attractive template that can be modified to multiarm polymeric constructs bearing a "tag and release" characteristic.
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Affiliation(s)
- Ozgul Gok
- Department of Chemistry, Bogazici University , Bebek 34342, Istanbul, Turkey
| | - Pelin Erturk
- Department of Chemistry, Bogazici University , Bebek 34342, Istanbul, Turkey
| | - Burcu Sumer Bolu
- Department of Chemistry, Bogazici University , Bebek 34342, Istanbul, Turkey
| | - Tugce Nihal Gevrek
- Department of Chemistry, Bogazici University , Bebek 34342, Istanbul, Turkey
| | - Rana Sanyal
- Department of Chemistry, Bogazici University , Bebek 34342, Istanbul, Turkey.,Center for Life Sciences and Technologies, Bogazici University , Istanbul, Turkey
| | - Amitav Sanyal
- Department of Chemistry, Bogazici University , Bebek 34342, Istanbul, Turkey.,Center for Life Sciences and Technologies, Bogazici University , Istanbul, Turkey
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21
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DiScenza DJ, Lynch J, Verderame M, Serio N, Prignano L, Gareau L, Levine M. Efficient Fluorescence Detection of Aromatic Toxicants and Toxicant Metabolites in Human Breast Milk. Supramol Chem 2017; 30:267-277. [PMID: 30880882 PMCID: PMC6420232 DOI: 10.1080/10610278.2017.1343947] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 06/14/2017] [Indexed: 02/04/2023]
Abstract
Once chemical contaminants are released into the environment, there are a number of concerns that arise regarding the environmental persistence of the contaminants, their known and suspected toxicities, and their potential disruption to the ecosystem. One class of contaminants that is of continuing concern is polycyclic aromatic hydrocarbons (PAHs), persistent organic pollutants that are significant components of oil spills. PAHs have been found in the breast milk of nursing mothers living in oil spill affected regions, and can harm the nursing children. We report herein the sensitive and selective detection of 10 PAHs and PAH metabolites in human breast milk using fluorescence energy transfer from the PAH to a high quantum yield fluorophore, and array-based statistical analyses of the resulting fluorescence responses. This detection system was able to separate and identify the PAHs with 100% success in human breast milk and at concentrations as low as 0.17 μM. These results have significant implications in public health and in the monitoring and mitigation of environmental disasters.
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Affiliation(s)
- Dana J. DiScenza
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, RI 02881
| | - Julie Lynch
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, RI 02881
| | - Molly Verderame
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, RI 02881
| | - Nicole Serio
- DOE Golden Field Office, Environmental Oversight Office, 15013 Denver West Parkway, Golden, Colorado 80401
| | - Lindsey Prignano
- Department of Chemistry & Biochemistry, Worcester Polytechnic Institute, 60 Prescott Street, Worcester, MA 01609
| | - Lauren Gareau
- School of Public Health, Boston University, 715 Albany Street, Boston, MA 02118
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, RI 02881
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22
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Goblirsch BR, Kalb EM, Marsh TC. Interfacial Au nanoparticle decoration of a disulfide modified G-wire. Biochim Biophys Acta Gen Subj 2016; 1861:1471-1476. [PMID: 27989638 DOI: 10.1016/j.bbagen.2016.12.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 11/17/2016] [Accepted: 12/14/2016] [Indexed: 10/20/2022]
Abstract
BACKGROUND The guanine-rich oligonucleotide (GRO), dGGGGTTGGGG (G4T2G4), has the capacity to form a linear supramolecular polymer known as a G-wire. Individual nucleotides of the component GROs can be functionally modified to serve as site-specific attachment points in the G-wire while not interfering with its self-assembling properties. An amine linker modification to an internal thymine base of the GRO, denoted G4TT*G4, serves as a chemically versatile attachment site. METHODS In this work, addition of an alkyl disulfide to G4TT*G4 produces the GRO G4TTdG4 enabling binding to gold nanoparticles via place exchange chemistry. G-wires assembled by combining G4T2G4 and G4TTdG4 were stably maintained in an aqueous environment. Disulfide modified G-wires (DS_G-wire) were then covered with dodecanethiol capped gold nanoparticles in an organic solvent via an interfacial place exchange reaction. Tapping Mode AFM and TEM were used to image G-wires decorated with gold nanoparticles. The specificity of the interfacial place exchange reaction was measured using a fluorometric dye displacement from the gold nanoparticles. RESULTS The results show that a two component DS_G-wire with an amphipathic tether readily self-assemble as shown by PAGE and TM-AFM. The amphipathic disulfide moiety of DS_G-wires facilitates place exchange chemistry with alkylthiol protected Au nanoparticles across an aqueous-organic interface. CONCLUSION Interfacial place exchange is an effective strategy for decorating DS_G-wires with Au nanoparticles. GENERAL SIGNIFICANCE The use of modified G-wire self-assembly combined with a high degree of nanoparticle binding specificity presents another strategy for the use of G-wires as a rigid one-dimensional molecular scaffold with potential applications in nanoscale device construction. This article is part of a Special Issue entitled "G-quadruplex" Guest Editor: Dr. Concetta Giancola and Dr. Daniela Montesarchio.
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Affiliation(s)
- Brandon R Goblirsch
- Department of Chemistry, University of St. Thomas, 2115 Summit Avenue, St. Paul, MN 55105, USA.
| | - Evan M Kalb
- Department of Chemistry, University of St. Thomas, 2115 Summit Avenue, St. Paul, MN 55105, USA.
| | - Thomas C Marsh
- Department of Chemistry, University of St. Thomas, 2115 Summit Avenue, St. Paul, MN 55105, USA.
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23
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Haag AL, Toader V, Lennox RB, Grutter P. Selective in situ potential-assisted SAM formation on multi electrode arrays. NANOTECHNOLOGY 2016; 27:455501. [PMID: 27694698 DOI: 10.1088/0957-4484/27/45/455501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The selective modification of individual components in a biosensor array is challenging. To address this challenge, we present a generalizable approach to selectively modify and characterize individual gold surfaces in an array, in an in situ manner. This is achieved by taking advantage of the potential dependent adsorption/desorption of surface-modified organic molecules. Control of the applied potential of the individual sensors in an array where each acts as a working electrode provides differential derivatization of the sensor surfaces. To demonstrate this concept, two different self-assembled monolayer (SAM)-forming electrochemically addressable ω-ferrocenyl alkanethiols (C11) are chemisorbed onto independent but spatially adjacent gold electrodes. The ferrocene alkanethiol does not chemisorb onto the surface when the applied potential is cathodic relative to the adsorption potential and the electrode remains underivatized. However, applying potentials that are modestly positive relative to the adsorption potential leads to extensive coverage within 10 min. The resulting SAM remains in a stable state while held at potentials <200 mV above the adsorption potential. In this state, the chemisorbed SAM does not significantly desorb nor do new ferrocenylalkythiols adsorb. Using three set applied potentials provides for controlled submonolayer alkylthiol marker coverage of each independent gold electrode. These three applied potentials are dependent upon the specifics of the respective adsorbate. Characterization of the ferrocene-modified electrodes via cyclic voltammetry demonstrates that each specific ferrocene marker is exclusively adsorbed to the desired target electrode.
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Affiliation(s)
- Ann-Lauriene Haag
- Ernest Rutherford Physics Building, Department of Physics, McGill University, 3600 Rue University, Montreal, H3A 2T8, QC, Canada
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24
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Bandarenka AS, Williams R, Plumeré N. Anodic Desorption Monitored by Voltammetric and Gravimetric Measurements for Fast Estimation of Surface Coverage of Complex Organic Molecules on Au Electrodes. ELECTROANAL 2016. [DOI: 10.1002/elan.201600243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Aliaksandr S. Bandarenka
- Center for Electrochemical Sciences - CES, Ruhr-Universität Bochum; Universitätsstr. 150; D-44780 Bochum Germany
- Physik-Department ECS; Technische Universität München; James-Franck-Strasse 1 85748 Garching Germany
- Nanosystems Initiative Munich (NIM); Schellingstrassee 4 80799 Munich Germany
| | - Rhodri Williams
- Center for Electrochemical Sciences - CES, Ruhr-Universität Bochum; Universitätsstr. 150; D-44780 Bochum Germany
| | - Nicolas Plumeré
- Center for Electrochemical Sciences - CES, Ruhr-Universität Bochum; Universitätsstr. 150; D-44780 Bochum Germany
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25
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Oz Y, Arslan M, Gevrek TN, Sanyal R, Sanyal A. Modular Fabrication of Polymer Brush Coated Magnetic Nanoparticles: Engineering the Interface for Targeted Cellular Imaging. ACS APPLIED MATERIALS & INTERFACES 2016; 8:19813-19826. [PMID: 27406320 DOI: 10.1021/acsami.6b04664] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Development of efficient and rapid protocols for diversification of functional magnetic nanoparticles (MNPs) would enable identification of promising candidates using high-throughput protocols for applications such as diagnostics and cure through early detection and localized delivery. Polymer brush coated magnetic nanoparticles find use in many such applications. A protocol that allows modular diversification of a pool of parent polymer coated nanoparticles will lead to a library of functional materials with improved uniformity. In the present study, polymer brush coated parent magnetic nanoparticles obtained using reversible addition-fragmentation chain transfer (RAFT) polymerization are modified to obtain nanoparticles with different "clickable" groups. In this design, trithiocarbonate group terminated polymer brushes are "grafted from" MNPs using a catechol group bearing initiator. A postpolymerization radical exchange reaction allows installation of "clickable" functional groups like azides and maleimides on the chain ends of the polymers. Thus, modified MNPs can be functionalized using alkyne-containing and thiol-containing moieties like peptides and dyes using the alkyne-azide cycloaddition and the thiol-ene conjugation, respectively. Using the approach outlined here, a cell surface receptor targeting cyclic peptide and a fluorescent dye are attached onto nanoparticle surface. This multifunctional construct allows selective recognition of cancer cells that overexpress integrin receptors. Furthermore, the approach outlined here is not limited to the installation of azide and maleimide functional groups but can be expanded to a variety of "clickable" groups to allow nanoparticle modification using a broad range of chemical conjugations.
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Affiliation(s)
- Yavuz Oz
- Department of Chemistry, Bogazici University , Bebek, 34342 Istanbul, Turkey
| | - Mehmet Arslan
- Department of Chemistry, Bogazici University , Bebek, 34342 Istanbul, Turkey
| | - Tugce N Gevrek
- Department of Chemistry, Bogazici University , Bebek, 34342 Istanbul, Turkey
| | - Rana Sanyal
- Department of Chemistry, Bogazici University , Bebek, 34342 Istanbul, Turkey
- Center for Life Sciences and Technologies, Bogazici University , Istanbul, Turkey
| | - Amitav Sanyal
- Department of Chemistry, Bogazici University , Bebek, 34342 Istanbul, Turkey
- Center for Life Sciences and Technologies, Bogazici University , Istanbul, Turkey
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26
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Serio N, Roque J, Badwal A, Levine M. Rapid and efficient pesticide detection via cyclodextrin-promoted energy transfer. Analyst 2016; 140:7503-7. [PMID: 26436147 DOI: 10.1039/c5an01471a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Cyclodextrins facilitate non-covalent fluorescence energy transfer from a variety of pesticides to high quantum-yield fluorophores, resulting in a rapid, sensitive detection scheme for these compounds with detection limits as low as two micromolar. Such a facile detection tool has significant potential applications in agriculture and public health research.
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Affiliation(s)
- Nicole Serio
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, USA.
| | - John Roque
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, USA.
| | - Andrew Badwal
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, USA.
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, USA.
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27
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Bkhach S, Le Duc Y, Alévêque O, Gautier C, Hudhomme P, Levillain E. Highly Stable Perylenediimide-Based Self-Assembled Monolayers Studied with Spectroelectrochemistry. ChemElectroChem 2016. [DOI: 10.1002/celc.201600034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sihame Bkhach
- Laboratoire MOLTECH-Anjou; Université d'Angers/CNRS UMR 6200; 2 Boulevard Lavoisier 49045 Angers Cedex France
| | - Yann Le Duc
- Laboratoire MOLTECH-Anjou; Université d'Angers/CNRS UMR 6200; 2 Boulevard Lavoisier 49045 Angers Cedex France
| | - Olivier Alévêque
- Laboratoire MOLTECH-Anjou; Université d'Angers/CNRS UMR 6200; 2 Boulevard Lavoisier 49045 Angers Cedex France
| | - Christelle Gautier
- Laboratoire MOLTECH-Anjou; Université d'Angers/CNRS UMR 6200; 2 Boulevard Lavoisier 49045 Angers Cedex France
| | - Piétrick Hudhomme
- Laboratoire MOLTECH-Anjou; Université d'Angers/CNRS UMR 6200; 2 Boulevard Lavoisier 49045 Angers Cedex France
| | - Eric Levillain
- Laboratoire MOLTECH-Anjou; Université d'Angers/CNRS UMR 6200; 2 Boulevard Lavoisier 49045 Angers Cedex France
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28
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Affiliation(s)
- Dana J. DiScenza
- Department of Chemistry, University of Rhode Island, Kingston, RI, USA
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, Kingston, RI, USA
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29
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Dey S, Vaidyanathan R, Carrascosa LG, Shiddiky MJA, Trau M. Electric Field Induced Isolation, Release, and Recapture of Tumor Cells. ACS Sens 2016. [DOI: 10.1021/acssensors.5b00157] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Shuvashis Dey
- Centre for Personalised NanoMedicine, Australian Institute for Bioengineering
and Nanotechnology (AIBN), Corner College and Cooper Roads (Bldg 75) and ‡School of Chemistry and Molecular
Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Ramanathan Vaidyanathan
- Centre for Personalised NanoMedicine, Australian Institute for Bioengineering
and Nanotechnology (AIBN), Corner College and Cooper Roads (Bldg 75) and ‡School of Chemistry and Molecular
Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Laura G. Carrascosa
- Centre for Personalised NanoMedicine, Australian Institute for Bioengineering
and Nanotechnology (AIBN), Corner College and Cooper Roads (Bldg 75) and ‡School of Chemistry and Molecular
Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Muhammad J. A. Shiddiky
- Centre for Personalised NanoMedicine, Australian Institute for Bioengineering
and Nanotechnology (AIBN), Corner College and Cooper Roads (Bldg 75) and ‡School of Chemistry and Molecular
Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Matt Trau
- Centre for Personalised NanoMedicine, Australian Institute for Bioengineering
and Nanotechnology (AIBN), Corner College and Cooper Roads (Bldg 75) and ‡School of Chemistry and Molecular
Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
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30
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DiScenza DJ, Levine M. Selective detection of non-aromatic pesticides via cyclodextrin-promoted fluorescence modulation. NEW J CHEM 2016. [DOI: 10.1039/c5nj02357b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The introduction of pesticides to a cyclodextrin-fluorophore solution leads to highly specific fluorescence changes that are used for pesticide detection.
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Affiliation(s)
| | - Mindy Levine
- Department of Chemistry
- University of Rhode Island
- Kingston
- USA
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31
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Solvent effects in the extraction and detection of polycyclic aromatic hydrocarbons from complex oils in complex environments. J INCL PHENOM MACRO 2015. [DOI: 10.1007/s10847-015-0583-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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32
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Kaga S, Gevrek TN, Sanyal A, Sanyal R. Synthesis and functionalization of dendron-polymer conjugate based hydrogels via sequential thiol-ene “click” reactions. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27926] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Sadik Kaga
- Department of Chemistry; Bogazici University; Bebek 34342 Istanbul Turkey
| | - Tugce N. Gevrek
- Department of Chemistry; Bogazici University; Bebek 34342 Istanbul Turkey
| | - Amitav Sanyal
- Department of Chemistry; Bogazici University; Bebek 34342 Istanbul Turkey
- Bogazici University, Center for Life Sciences and Technologies; Istanbul Turkey
| | - Rana Sanyal
- Department of Chemistry; Bogazici University; Bebek 34342 Istanbul Turkey
- Bogazici University, Center for Life Sciences and Technologies; Istanbul Turkey
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33
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Radaram B, Levine M. Rationally Designed Supramolecular Organic Hosts for Benzo[a]pyrene Binding and Detection. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500684] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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34
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Serio N, Moyano DF, Rotello VM, Levine M. Array-based detection of persistent organic pollutants via cyclodextrin promoted energy transfer. Chem Commun (Camb) 2015; 51:11615-8. [PMID: 26096542 DOI: 10.1039/c5cc04153h] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report herein the selective array-based detection of 30 persistent organic pollutants via cyclodextrin-promoted energy transfer. The use of three fluorophores enabled the development of an array that classified 30 analytes with 100% accuracy and identified unknown analytes with 96% accuracy, as well as identifying 92% of analytes in urine.
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Affiliation(s)
- Nicole Serio
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, USA.
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35
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Serio N, Levine M. Efficient extraction and detection of aromatic toxicants from crude oil and tar balls using multiple cyclodextrin derivatives. MARINE POLLUTION BULLETIN 2015; 95:242-7. [PMID: 25956442 DOI: 10.1016/j.marpolbul.2015.04.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 03/24/2015] [Accepted: 04/10/2015] [Indexed: 05/08/2023]
Abstract
Herein we report the efficient extraction of aromatic analytes from crude oil and tar balls using multiple cyclodextrin derivatives. The known propensity of the cyclodextrins to bind hydrophobic guests in their hydrophobic interiors enhanced the extraction of aromatic analytes from the oil layer to the aqueous layer, with methyl-β-cyclodextrin and β-cyclodextrin providing the most significant enhancement in extraction efficiencies of aromatic toxicants (69% aromatic toxicants in aqueous layer in the presence of methyl-β-cyclodextrin compared to 47% in cyclodextrin-free solution for tar ball oil extraction), and provide optimal tunability for developing efficient extraction systems. The cyclodextrin derivatives also promoted efficient energy transfer in the aqueous solutions, with up to 86% efficient energy transfer observed in the presence of γ-cyclodextrin compared to 50% in the absence of cyclodextrin for oil spill oil extraction. Together, this dual function extraction followed by detection system has potential in the development of environmental remediation systems.
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Affiliation(s)
- Nicole Serio
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, United States
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, United States.
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36
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Francini N, Purdie L, Alexander C, Mantovani G, Spain SG. Multifunctional Poly[N-(2-hydroxypropyl)methacrylamide] Copolymers via Postpolymerization Modification and Sequential Thiol–Ene Chemistry. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00447] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Nora Francini
- School of Pharmacy, University of Nottingham, University Park, Nottingham. NG7 2RD. U.K
| | - Laura Purdie
- School of Pharmacy, University of Nottingham, University Park, Nottingham. NG7 2RD. U.K
| | - Cameron Alexander
- School of Pharmacy, University of Nottingham, University Park, Nottingham. NG7 2RD. U.K
| | - Giuseppe Mantovani
- School of Pharmacy, University of Nottingham, University Park, Nottingham. NG7 2RD. U.K
| | - Sebastian G. Spain
- School of Pharmacy, University of Nottingham, University Park, Nottingham. NG7 2RD. U.K
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37
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Frequency response analysis of potential-modulated orientation changes of a DNA self assembled layer using spatially resolved fluorescence measurements. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.09.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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38
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Stolar RB, Guerra E, Shepherd JL. The influence of thiolate readsorption on the quality of mixed monolayers formed through an electrochemcial method. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:2157-2166. [PMID: 25625688 DOI: 10.1021/la5046767] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Lateral Force Microscopy (LFM) was used to probe the quality of binary mixed monolayers formed on planar polycrystalline gold through an electrochemical method. In the approach, portions of a self-assembled monolayer (SAM) composed of 2-aminoethanethiol (AET) were removed from the Au(111) surface facets by selective reductive desorption which maintained undisrupted regions of AET elsewhere on the polycrystalline surface. Monolayer voids created by this method were backfilled with 11-mercaptoundecanoic acid (MUA) and the interface characterized with ex situ LFM. This produced images with domains of high and low friction corresponding to isolated zones of MUA and AET respectively. Reverse sequence mixed monolayers were also prepared with MUA as the starting layer and rendered LFM images that mirrored the AET based layers. This demonstrates flexibility of the electrochemical method to produce heterogeneous binary SAMs, and to further probe the quality of mixed monolayers, a number of experimental conditions including desorption time, electrode configuration, and initial incubation period were studied. AET/MUA layers that produced the most enhanced LFM images were formed on a planar electrode that was vertically submerged into the electrolyte while maintaining a selective desorption potential for 5 min before backfilling with MUA. This condition allowed for the effective diffusion of AET away from the interface and created well-defined monolayer voids for backfilling. At desorption times lower than 1 min, some of the AET molecules that remained near the interface would readsorb onto the surface and interfere with the backfilling process thereby creating lower contrast LFM images. Structural features of these layers were independent of initial incubation time (10 min and 16 h); however, the contrast between domains was improved when using AET layers formed over a longer incubation period. Interestingly, the contrast was significantly reduced when mixed layers were created on electrodes set in a hanging meniscus with the electrolyte. Here, electrochemical evidence pointed to prolonged readsorption of thiolates creating less well-defined voids for backfilling, and the event was most pronounced for MUA based layers.
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Affiliation(s)
- Rylan B Stolar
- Chemistry & Biochemistry Department, Laurentian University , Sudbury, ON, Canada , P3E 2C6
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39
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Alévêque O, Levillain E, Sanguinet L. Spectroelectrochemistry on electroactive self-assembled monolayers: Cyclic voltammetry coupled to spectrophotometry. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2014.12.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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40
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Meunier A, Triffaux E, Bizzotto D, Buess-Herman C, Doneux T. In Situ Fluorescence Microscopy Study of the Interfacial Inhomogeneity of DNA Mixed Self-Assembled Monolayers at Gold Electrodes. ChemElectroChem 2015. [DOI: 10.1002/celc.201402273] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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41
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Yu ZL, Casanova-Moreno J, Guryanov I, Maran F, Bizzotto D. Influence of Surface Structure on Single or Mixed Component Self-Assembled Monolayers via in Situ Spectroelectrochemical Fluorescence Imaging of the Complete Stereographic Triangle on a Single Crystal Au Bead Electrode. J Am Chem Soc 2014; 137:276-88. [DOI: 10.1021/ja5104475] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Ivan Guryanov
- Department
of Chemistry, University of Padova, 35122 Padova, Italy
| | - Flavio Maran
- Department
of Chemistry, University of Padova, 35122 Padova, Italy
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42
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2-Hydroxypropyl beta-cyclodextrin for the enhanced performance of dual function extraction and detection systems in complex oil environments. J INCL PHENOM MACRO 2014. [DOI: 10.1007/s10847-014-0460-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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43
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Gevrek TN, Bilgic T, Klok HA, Sanyal A. Maleimide-Functionalized Thiol Reactive Copolymer Brushes: Fabrication and Post-Polymerization Modification. Macromolecules 2014. [DOI: 10.1021/ma5015098] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Tugce Nihal Gevrek
- Department
of Chemistry, Bogazici University, Bebek, 34342, Istanbul, Turkey
| | - Tugba Bilgic
- Institut
des Matériaux and Institut des Sciences et Ingénierie
Chimiques, Laboratoire des Polymères, Ecole Polytechnique Fédérale de Lausanne (EPFL), Bâtiment MXD, Station 12, CH-1015 Lausanne, Switzerland
| | - Harm-Anton Klok
- Institut
des Matériaux and Institut des Sciences et Ingénierie
Chimiques, Laboratoire des Polymères, Ecole Polytechnique Fédérale de Lausanne (EPFL), Bâtiment MXD, Station 12, CH-1015 Lausanne, Switzerland
| | - Amitav Sanyal
- Department
of Chemistry, Bogazici University, Bebek, 34342, Istanbul, Turkey
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44
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Park EJ, Gevrek TN, Sanyal R, Sanyal A. Indispensable Platforms for Bioimmobilization: Maleimide-Based Thiol Reactive Hydrogels. Bioconjug Chem 2014; 25:2004-11. [DOI: 10.1021/bc500375r] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Eun Ju Park
- Department
of Chemistry and ‡Center for Life Sciences and Technologies, Bogazici University, Istanbul 34342, Turkey
| | - Tugce Nihal Gevrek
- Department
of Chemistry and ‡Center for Life Sciences and Technologies, Bogazici University, Istanbul 34342, Turkey
| | - Rana Sanyal
- Department
of Chemistry and ‡Center for Life Sciences and Technologies, Bogazici University, Istanbul 34342, Turkey
| | - Amitav Sanyal
- Department
of Chemistry and ‡Center for Life Sciences and Technologies, Bogazici University, Istanbul 34342, Turkey
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45
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Serio N, Prignano L, Peters S, Levine M. Detection of Medium-Sized Polycyclic Aromatic Hydrocarbons via Fluorescence Energy Transfer. Polycycl Aromat Compd 2014; 34:561-572. [PMID: 25821390 DOI: 10.1080/10406638.2014.918889] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Reported herein is the use of proximity-induced non-covalent energy transfer for the detection of medium-sized polycyclic aromatic hydrocarbons (PAHs). This energy transfer occurs within the cavity of γ-cyclodextrin in various aqueous environments, including human plasma and coconut water. Highly efficient energy transfer was observed, and the efficiency of the energy transfer is independent of the concentration of γ-cyclodextrin used, demonstrating the importance of hydrophobic binding in facilitating such energy transfer. Low limits of detection were also observed for many of the PAHs investigated, which is promising for the development of fluorescence-based detection schemes.
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Affiliation(s)
- Nicole Serio
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island, USA
| | - Lindsey Prignano
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island, USA
| | - Sean Peters
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island, USA
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island, USA
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46
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Arslan M, Gevrek TN, Lyskawa J, Szunerits S, Boukherroub R, Sanyal R, Woisel P, Sanyal A. Bioinspired Anchorable Thiol-Reactive Polymers: Synthesis and Applications Toward Surface Functionalization of Magnetic Nanoparticles. Macromolecules 2014. [DOI: 10.1021/ma500693f] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Mehmet Arslan
- Department
of Chemistry, Bogazici University, Bebek, 34342, Istanbul, Turkey
| | - Tugce Nihal Gevrek
- Department
of Chemistry, Bogazici University, Bebek, 34342, Istanbul, Turkey
| | - Joel Lyskawa
- Université Lille Nord de France, F-59000 Lille, France
- Unité
des Matériaux Et Transformations (UMET, UMR 8207), Equipe Ingénierie
des Systèmes polymères (ISP), Université Lille 1, F-59655, Villeneuve d’Ascq Cedex, France
| | - Sabine Szunerits
- Institut
de Recherche Interdisciplinaire-IRI, Parc de la Haute Borne, 50
avenue de Halley, BP70478, 59658 Villeneuve d’Ascq Cedex, France
| | - Rabah Boukherroub
- Institut
de Recherche Interdisciplinaire-IRI, Parc de la Haute Borne, 50
avenue de Halley, BP70478, 59658 Villeneuve d’Ascq Cedex, France
| | - Rana Sanyal
- Department
of Chemistry, Bogazici University, Bebek, 34342, Istanbul, Turkey
- Center
for Life Sciences and Technologies, Bogazici University, Istanbul, Turkey
| | - Patrice Woisel
- Université Lille Nord de France, F-59000 Lille, France
- Unité
des Matériaux Et Transformations (UMET, UMR 8207), Equipe Ingénierie
des Systèmes polymères (ISP), Université Lille 1, F-59655, Villeneuve d’Ascq Cedex, France
- ENSCL, F-59655 Villeneuve
d’Ascq, France
| | - Amitav Sanyal
- Department
of Chemistry, Bogazici University, Bebek, 34342, Istanbul, Turkey
- Center
for Life Sciences and Technologies, Bogazici University, Istanbul, Turkey
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47
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Berkes BB, Huang M, Henry JB, Kokoschka M, Bandarenka AS. Characterisation of Complex Electrode Processes using Simultaneous Impedance Spectroscopy and Electrochemical Nanogravimetric Measurements. Chempluschem 2014; 79:348-358. [PMID: 31986607 DOI: 10.1002/cplu.201300423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Revised: 01/23/2014] [Indexed: 11/08/2022]
Abstract
The methodology and illustrative examples of application are presented for a technique that simultaneously combines electrochemical impedance spectroscopy (EIS) and nanogravimetric measurements; the latter are implemented using a so-called electrochemical quartz crystal nanobalance (EQCN). The combination of EIS and EQCN provides a powerful method for the characterisation of many complex processes at electrochemical interfaces. This method gives in one relatively simple experiment more detailed information than is available from conventional electrochemical techniques. The combined measurements can be performed either as a function of time, at a constant electrode potential, or under potentiodynamic conditions, as a function of the electrode potential. Herein, we show how this can be applied to enable more accurate investigation of processes that occur at boundaries between electrodes and electrolytes. The application examples range from eletrocatalysis, in which evaluation of a catalyst is performed simultaneously with its formation, and the intercalation and electrodeposition of thin metal films to in situ characterisation of non-electroactive self-assembled monolayers during their formation.
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Affiliation(s)
- Balázs B Berkes
- Center for Electrochemical Sciences-CES, Ruhr-Universität Bochum, Universitätsstrasse 150, 44780 Bochum (Germany).,Current address: Battery and Electrochemistry Laboratory, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany)
| | - Minghua Huang
- Center for Electrochemical Sciences-CES, Ruhr-Universität Bochum, Universitätsstrasse 150, 44780 Bochum (Germany).,Institute of Materials Science and Engineering, Ocean University of China, Qingdao 266100 (P. R. China)
| | - John B Henry
- Center for Electrochemical Sciences-CES, Ruhr-Universität Bochum, Universitätsstrasse 150, 44780 Bochum (Germany).,School of Chemistry, The University of Edinburgh, King's Buildings, West Mains Road, Edinburgh, EH9 3JJ (UK)
| | - Malte Kokoschka
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague (Czech Republic)
| | - Aliaksandr S Bandarenka
- Center for Electrochemical Sciences-CES, Ruhr-Universität Bochum, Universitätsstrasse 150, 44780 Bochum (Germany)
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48
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In situ sum-frequency vibrational spectroscopy of electrochemical interfaces with surface plasmon resonance. Proc Natl Acad Sci U S A 2014; 111:1293-7. [PMID: 24474751 DOI: 10.1073/pnas.1317290111] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Electrochemical (EC) reactions are crucial in many applications, yet most EC analytical tools lack the sensitivity to access molecular-level information of reactants and products. By combining sum-frequency vibrational spectroscopy and surface plasmon resonance at EC interfaces, we demonstrate the feasibility of measuring in situ and real-time vibrational spectra during EC reactions at noble metal electrodes. Application of the technique to EC reactions at a gold surface helps in understanding how the surface in a basic solution is oxidized and reduced during a cyclic voltammetry cycle. Study of desorption of a thiol self-assembled monolayer from gold through EC reactions in a basic solution shows that the desorbed thiols by reductive reaction remain as an ordered layer near the gold interface, but do diffuse away if they are desorbed oxidatively from gold.
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49
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Serio N, Chanthalyma C, Prignano L, Levine M. Cyclodextrin-promoted energy transfer for broadly applicable small-molecule detection. Supramol Chem 2014; 26:714-721. [PMID: 25937786 DOI: 10.1080/10610278.2013.860226] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Reported herein is the development of non-covalent, proximity-induced energy transfer from small-molecule toxicants to organic fluorophores bound in the cavity of γ-cyclodextrin. This energy transfer occurs with exceptional efficiency for a broad range of toxicants in complex biological media, and is largely independent of the spectral overlap between the donor and acceptor. This generally applicable phenomenon has significant potential in the development of new turn-on detection schemes.
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Affiliation(s)
- Nicole Serio
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, USA
| | - Chitapom Chanthalyma
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, USA
| | - Lindsey Prignano
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, USA
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, 51 Lower College Road, Kingston, RI 02881, USA
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50
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Beria L, Gevrek TN, Erdog A, Sanyal R, Pasini D, Sanyal A. ‘Clickable’ hydrogels for all: facile fabrication and functionalization. Biomater Sci 2014; 2:67-75. [DOI: 10.1039/c3bm60171d] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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