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Merir R, Baitiche M, Elbahri Z, Bourzami R, Djerboua F, Boutahala M. Conception of Cellulose/Alginate/Mesalazine microspheres by solvent evaporation technique for drug release: Experimental and theoretical investigations. Int J Biol Macromol 2023:124894. [PMID: 37196720 DOI: 10.1016/j.ijbiomac.2023.124894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 04/24/2023] [Accepted: 05/12/2023] [Indexed: 05/19/2023]
Abstract
Preparation of microspheres containing Mesalazine referred to as 5-aminosalicylic acid (5-ASA) for colon targeting drug was carried out using the emulsion solvent evaporation technique. The formulation was based on 5-ASA as the active agent, sodium Alginate (SA) andEthylcellulose (EC) as encapsulating agents, with polyvinyl alcohol (PVA) as emulsifier. The effects ofthe following processing parameters, 5-ASA %, EC:SA ratio and stirring rate on the properties of the resulting products in the form microspheres were considered. The samples were characterized using Optical microscopy, SEM, PXRD, FTIR, TGA, and DTG. In vitro release of 5-ASA from the different batches of microspheres was tested in biologically simulated fluids, (gastric; SGF, pH 1.2 for 2 h), then (intestinal fluid SIF, pH 7.4for 12 h) at 37 °C. The release kinetic results have been treated mathematically relaying on Higuchi's and Korsmeyer-Peppas' models for drug liberation. DOE study was performed to evaluate the interactive effects of variables on the drug entrapment and microparticle sizes. Molecular chemical interactions in structures were optimized using DFT analysis.
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Affiliation(s)
- Roufaida Merir
- Laboratory of Multiphasic Polymeric Materials, Department of Process Engineering, Faculty of Technology, Ferhat Abbas Sétif 1University, 19000 Sétif, Algeria; Laboratory of Chemical Process Engineering, Department of Process Engineering, Faculty of Technology, Ferhat Abbas Sétif1University, 19000 Sétif, Algeria
| | - Milad Baitiche
- Laboratory of Multiphasic Polymeric Materials, Department of Process Engineering, Faculty of Technology, Ferhat Abbas Sétif 1University, 19000 Sétif, Algeria
| | - Zineb Elbahri
- Laboratory of Materials and Catalysis, Faculty of Exact Sciences, Djillali Liabes University, Sidi Bel Abbes 22000, Algeria
| | - Riadh Bourzami
- Research Unit on Emergent Materials, Ferhat Abbas Sétif1University, 19000 Sétif, Algeria
| | - Ferhat Djerboua
- Laboratory of Multiphasic Polymeric Materials, Department of Process Engineering, Faculty of Technology, Ferhat Abbas Sétif 1University, 19000 Sétif, Algeria
| | - Mokhtar Boutahala
- Laboratory of Chemical Process Engineering, Department of Process Engineering, Faculty of Technology, Ferhat Abbas Sétif1University, 19000 Sétif, Algeria.
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2
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Chakraborty G, Bondarde MP, Ray AK, Some S. Photophysical Modulation of Rhodamine‐B via π‐π stacking with GQD and Its Further Tuning by Cucurbit[7]uril**. ChemistrySelect 2023. [DOI: 10.1002/slct.202203689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Goutam Chakraborty
- Laser and Plasma Technology Division, Bhabha Atomic Research Centre Mumbai 400085 India
| | - Mahesh P. Bondarde
- Department of Speciality Chemicals Technology Institute of Chemical Technology, Matunga Mumbai 400019 India
| | - Alok K. Ray
- Laser and Plasma Technology Division, Bhabha Atomic Research Centre Mumbai 400085 India
- Homi Bhabha National Institute Mumbai 400094 India
| | - Surajit Some
- Department of Speciality Chemicals Technology Institute of Chemical Technology, Matunga Mumbai 400019 India
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3
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Almeida NBF, Sousa TASL, Santos VCF, Lacerda CMS, Silva TG, Grenfell RFQ, Plentz F, Andrade ASR. DNA aptamer selection and construction of an aptasensor based on graphene FETs for Zika virus NS1 protein detection. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2022; 13:873-881. [PMID: 36105684 PMCID: PMC9443353 DOI: 10.3762/bjnano.13.78] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 08/25/2022] [Indexed: 06/15/2023]
Abstract
Zika virus (ZIKV) is a mosquito-borne virus that is phylogenetically close to other medically important flaviviruses with high global public health significance, such as dengue (DENV) and yellow fever (YFV) viruses. Correct diagnosis of a flavivirus infection can be challenging, particularly in world regions where more than one flavivirus co-circulates and YFV vaccination is mandatory. Acid nucleic aptamers are oligonucleotides that bind to a specific target molecule with high affinity and specificity. Because of their unique characteristics, aptamers are promising tools for biosensor development. Aptamers are usually obtained through a procedure called "systematic evolution of ligands by exponential enrichment" (SELEX). In this study, we select an aptamer (termed ZIKV60) by capillary electrophoresis SELEX (CE-SELEX) to the Zika virus non-structural protein 1 (NS1) and counterselection against the NS1 proteins of DENV (serotypes 1, 2, 3, and 4) and YFV. The ZIKV60 dissociation constant (K d) is determined by enzyme-linked oligonucleotide assay (ELONA) and the aptamer specificity is evaluated by quantitative real-time polymerase chain reaction. ZIKV60 shows a high binding affinity to the ZIKV NS1 protein with a K d value of 2.28 ± 0.28 nM. The aptamer presents high specificity for ZIKV NS1 compared to NS1 of DENV and YFV. Furthermore, graphene field-effect transistor devices functionalized with ZIKV60 exhibit an evident identification of NS1 protein diluted in human serum. These results point to the applicability of biosensors based on the ZIKV60 aptamer for the differential diagnosis of the Zika virus.
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Affiliation(s)
- Nathalie B F Almeida
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Rua Professor José Vieira de Mendonça 770, Belo Horizonte, CEP 31310-260, Brazil
| | - Thiago A S L Sousa
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Rua Professor José Vieira de Mendonça 770, Belo Horizonte, CEP 31310-260, Brazil
- Current address: DTU Physics, Technical University of Denmark, Kongens Lyngby, 2800, Denmark
| | - Viviane C F Santos
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Rua Professor José Vieira de Mendonça 770, Belo Horizonte, CEP 31310-260, Brazil
| | - Camila M S Lacerda
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Rua Professor José Vieira de Mendonça 770, Belo Horizonte, CEP 31310-260, Brazil
| | - Thais G Silva
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Rua Professor José Vieira de Mendonça 770, Belo Horizonte, CEP 31310-260, Brazil
| | - Rafaella F Q Grenfell
- Instituto René Rachou - Fundação Oswaldo Cruz, Avenida Augusto de Lima 1715, Belo Horizonte, Minas Gerais, 30190-002, Brazil
| | - Flavio Plentz
- Departamento de Física, ICEx, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
- MedicOnChip, Parque Tecnológico de Belo Horizonte-BH-TEC, Rua Professor José Vieira de Mendonça 770, Belo Horizonte, CEP 31310-260, Brazil
| | - Antero S R Andrade
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Avenida Presidente Antônio Carlos 6627, Belo Horizonte, CEP 31270-901, Brazil
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4
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Karton A. π–π interactions between benzene and graphene by means of large-scale DFT-D4 calculations. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Yan H, Li P, Jiang X, Wang X, Hu Y, Zhang Y, Su R, Su W. Preparation of graphene oxide/polydopamine-curcumin composite nanomaterials and its antibacterial effect against Staphylococcus aureus induced by white light. BIOMATERIALS ADVANCES 2022; 139:213040. [PMID: 35914429 DOI: 10.1016/j.bioadv.2022.213040] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 07/05/2022] [Accepted: 07/17/2022] [Indexed: 06/15/2023]
Abstract
Curcumin (Cur) plays a key role in photodynamic antibacterial activity as a photosensitizer. On the other hand, the antimicrobial potential of graphene oxide (GO) has been reported controversially, and how to improve its antimicrobial ability has become an meaningful study. In this study, we prepared polydopamine-curcumin (PDA-Cur) by pi-pi stacking and loaded it onto the GO surface to obtain GO/PDA-Cur composite nanomaterials. GO/PDA-Cur was characterized by physical and optical means, and GO/PDA-Cur possessed good dispersion and stability in water. In vitro antibacterial results showed that GO/PDA-Cur mediated photodynamic therapy significantly reduced Gram-positive Staphylococcus aureus (S. aureus) by 4 orders of magnitude with a bactericidal rate of 99.99 %. The antibacterial mechanism stems from the fact that GO/PDA-Cur can generate reactive oxygen species (ROS) under white light irradiation (405-780 nm), which causes bacterial outer membrane breakage and cellular deformation. In addition, GO/PDA-Cur has good biocompatibility. The antibacterial ability of graphene oxide was significantly improved by combining it with PDA-Cur, which allows it to be used as a photodynamic antibacterial material.
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Affiliation(s)
- Hongjun Yan
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China
| | - Peiyuan Li
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China.
| | - Xiantao Jiang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, China
| | - Xiaoxun Wang
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China
| | - Yuting Hu
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China
| | - Ying Zhang
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China
| | - Rixiang Su
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China
| | - Wei Su
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, China.
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6
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Bae Y, Ha MY, Bang KT, Yang S, Kang SY, Kim J, Sung J, Kang S, Kang D, Lee WB, Choi TL, Park J. Conformation Dynamics of Single Polymer Strands in Solution. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2202353. [PMID: 35725274 DOI: 10.1002/adma.202202353] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 06/16/2022] [Indexed: 06/15/2023]
Abstract
Conformational changes in macromolecules significantly affect their functions and assembly into high-level structures. Despite advances in theoretical and experimental studies, investigations into the intrinsic conformational variations and dynamic motions of single macromolecules remain challenging. Here, liquid-phase transmission electron microscopy enables the real-time tracking of single-chain polymers. Imaging linear polymers, synthetically dendronized with conjugated aromatic groups, in organic solvent confined within graphene liquid cells, directly exhibits chain-resolved conformational dynamics of individual semiflexible polymers. These experimental and theoretical analyses reveal that the dynamic conformational transitions of the single-chain polymer originate from the degree of intrachain interactions. In situ observations also show that such dynamics of the single-chain polymer are significantly affected by environmental factors, including surfaces and interfaces.
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Affiliation(s)
- Yuna Bae
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
- Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
| | - Min Young Ha
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ki-Taek Bang
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sanghee Yang
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sung Yun Kang
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Joodeok Kim
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
- Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
| | - Jongbaek Sung
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
- Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
| | - Sungsu Kang
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
- Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
| | - Dohun Kang
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Won Bo Lee
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Tae-Lim Choi
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jungwon Park
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
- Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea
- Institute of Engineering Research, Seoul National University, Seoul, 08826, Republic of Korea
- Advanced Institutes of Convergence Technology, Seoul National University, Suwon, Gyeonggi, 16229, Republic of Korea
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7
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Cojal González JD, Iyoda M, Rabe JP. Resonant Electron Tunneling Induces Isomerization of π-Expanded Oligothiophene Macrocycles in a 2D Crystal. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200557. [PMID: 35355440 PMCID: PMC9259718 DOI: 10.1002/advs.202200557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 02/24/2022] [Indexed: 06/14/2023]
Abstract
Macrocyclic oligothiophenes and their π-expanded derivatives constitute versatile building blocks for the design of (supra)molecularly engineered active interfaces, owing to their structural, chemical, and optoelectronic properties. Here, it is demonstrated how resonant tunneling effect induces single molecular isomerization in a 2D crystal, self-assembled at solid-liquid interfaces under ambient conditions. Monolayers of a series of four π-expanded oligothiophene macrocycles are investigated by means of scanning tunneling microscopy and scanning tunneling spectroscopy (STS) at the interface between their octanoic acid solutions and the basal plane of highly oriented pyrolytic graphite. Current-voltage characteristics confirm the donor-type character of the macrocycles, with the highest occupied molecular orbital and the lowest unoccupied molecular orbital (LUMO) positions consistent with time-dependent density functional theory calculations. Cyclic STS measurements show the redox isomerization from Z,Z-8T6A to its isomer E,E-8T6A occurring in the 2D crystal, due to the formation of a negatively charged species when the tunneling current is in resonance with the LUMO of the macrocycle.
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Affiliation(s)
- José D. Cojal González
- Department of Physics and IRIS AdlershofHumboldt‐Universität zu BerlinNewtonstr. 15BerlinD‐12489Germany
| | - Masahiko Iyoda
- Department of ChemistryGraduate School of ScienceTokyo Metropolitan UniversityHachiojiTokyo192‐0397Japan
| | - Jürgen P. Rabe
- Department of Physics and IRIS AdlershofHumboldt‐Universität zu BerlinNewtonstr. 15BerlinD‐12489Germany
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8
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Kuznetsov AE. Review of research of nanocomposites based on graphene quantum dots. PHYSICAL SCIENCES REVIEWS 2022. [DOI: 10.1515/psr-2019-0135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Graphene quantum dots (GQDs) belong to the vast and versatile family of carbon nanomaterials. Their unique position amongst versatile carbon nanoparticles (NPs) originates from the properties of quantum confinement and edge effects. GQDs are similar to conventional semiconductor QDs due to their tunable band gaps and high photoluminescence activity. However, GQDs have superior characteristics due to their excellent biocompatibility, low toxicity, good water dispersibility, large optical absorptivity, high fluorescence activity and photostability. These properties have generated significant interest in GQDs applications in various fields: nanosensor fabrication, drug delivery, photocatalysis, photovoltaics, and photodynamic therapy. Numerous GQD-based nanocomposites/nanohybrides have been synthesized and/or studied computationally. This review focuses on recent computational studies of various GQD-based nanocomposites/nanohybrides and systems which can be related to them.
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Affiliation(s)
- Aleksey E. Kuznetsov
- Department of Chemistry , Universidad Tecnica Federico Santa Maria , Santiago , Chile
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9
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Alić J, Biljan I, Štefanić Z, Šekutor M. Preparation and characterization of non-aromatic ether self-assemblies on a HOPG surface. NANOTECHNOLOGY 2022; 33:355603. [PMID: 35545006 DOI: 10.1088/1361-6528/ac6e72] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/11/2022] [Indexed: 06/15/2023]
Abstract
On-surface self-assemblies of aromatic organic molecules have been widely investigated, but the characterization of analogous self-assemblies consisting of fully sp3-hybridized molecules remains challenging. The possible on-surface orientations of alkyl molecules not exclusively comprised of long alkyl chains are difficult to distinguish because of their inherently low symmetry and non-planar nature. Here, we present a detailed study of diamondoid ethers, structurally rigid and fully saturated molecules, which form uniform 2D monolayers on a highly oriented pyrolytic graphite (HOPG) surface. Using scanning tunneling microscopy, various computational tools, and x-ray structural analysis, we identified the most favorable on-surface orientations of these rigid ethers and accounted for the forces driving the self-organization process. The influence of the oxygen atom and London dispersion interactions were found to be responsible for the formation of the observed highly ordered 2D ether assemblies. Our findings provide insight into the on-surface properties and behavior of non-aromatic organic compounds and broaden our understanding of the phenomena characteristic of monolayers consisting of non-planar molecules.
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Affiliation(s)
- Jasna Alić
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
| | - Ivana Biljan
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10 000 Zagreb, Croatia
| | - Zoran Štefanić
- Department of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
| | - Marina Šekutor
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
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10
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Deshmukh S, Macko T, Arndt JH, Barton B, Bernardo R, van Doremaele G, Brüll R. Solvent Selection for Liquid Adsorption Chromatography of Ethylene–Propylene–Diene Terpolymers by Combining Structure–Retention Relationships and Hansen Solubility Parameters. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Subrajeet Deshmukh
- Fraunhofer Institute for Structural Durability and System Reliability, Division Plastics, Group Material Analysis, Schlossgartenstrasse 6, 64289 Darmstadt, Germany
| | - Tibor Macko
- Fraunhofer Institute for Structural Durability and System Reliability, Division Plastics, Group Material Analysis, Schlossgartenstrasse 6, 64289 Darmstadt, Germany
| | - Jan-Hendrik Arndt
- Fraunhofer Institute for Structural Durability and System Reliability, Division Plastics, Group Material Analysis, Schlossgartenstrasse 6, 64289 Darmstadt, Germany
| | - Bastian Barton
- Fraunhofer Institute for Structural Durability and System Reliability, Division Plastics, Group Material Analysis, Schlossgartenstrasse 6, 64289 Darmstadt, Germany
| | - Raffaele Bernardo
- ARLANXEO Netherlands B.V., Urmonderbaan 22, 6167 RD Geleen, The Netherlands
| | | | - Robert Brüll
- Fraunhofer Institute for Structural Durability and System Reliability, Division Plastics, Group Material Analysis, Schlossgartenstrasse 6, 64289 Darmstadt, Germany
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11
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Phenol functionalized high‐density polyethylene as compatibilizer of high‐density polyethylene/graphene nanocomposites toward enhanced mechanical and interfacial adhesion. J Appl Polym Sci 2022. [DOI: 10.1002/app.51611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Abbasian H, Rochefort A. Electrostatic patterning on graphene with dipolar self-assembly. Phys Chem Chem Phys 2021; 23:22014-22021. [PMID: 34570130 DOI: 10.1039/d1cp02272e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We have investigated the influence of electric dipole moment in different periodic two-dimensional network on the electronic structure properties of graphene. Although the control of doping level in graphene within a van der Waals heterostructure constitutes a difficult task, the dipolar nature of the different molecular stacks can be used to control its electrostatic properties. First, we demonstrate that the orientation and magnitude of the adsorbed molecular dipole moments allow to control the electrical behaviour of graphene, and acts as an electrostatic gate that shifts neutrality point of graphene to behave as n- or p-doped materials. Then, we show that the presence of local dipole moment in SAN induces an electrostatic potential in graphene that creates well-defined patterned regions with different electronic characteristics that would influence the confinement of molecular species.
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Affiliation(s)
- Hamed Abbasian
- Engineering Physics Department, Polytechnique Montréal, Canada.
| | - Alain Rochefort
- Engineering Physics Department, Polytechnique Montréal, Canada.
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Baran Ł. Coarse-Grained Modeling of On-Surface Self-Assembly of Mixtures Comprising Di-Substituted Polyphenyl-Like Compounds and Metal Atoms of Different Sizes. ACS OMEGA 2021; 6:25193-25200. [PMID: 34632178 PMCID: PMC8495698 DOI: 10.1021/acsomega.1c02857] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 09/08/2021] [Indexed: 06/01/2023]
Abstract
We use coarse-grained molecular dynamics simulations to investigate the phase behavior of binary mixtures of di-substituted polyphenyl-like compounds and metal atoms of different sizes. We have estimated the possible on-surface behavior that could be useful for the target design of particular ordered networks. We have found that due to the variation of system conditions, we can observe the formation of the parallel, square, and triangular networks, Archimedean tessellation, and "spaghetti wires." All of these structures have been characterized by various order parameters.
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14
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da Silva JL, Delfino JR, Stradiotto NR. Underivatized amino acids detection by anion-exchange chromatography coupled to a nanostructured detector. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1174:122733. [PMID: 33991824 DOI: 10.1016/j.jchromb.2021.122733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 04/13/2021] [Accepted: 04/21/2021] [Indexed: 10/21/2022]
Abstract
This work reports the development of a fast and reliable amperometric sensor for the detection of amino acids. The detector was constructed using copper nanoparticles (CuNPs) supported on reduced graphene oxide (RGO) modified glassy carbon electrode (CuNPs-RGO/GCE) and based on the application of high performance anion-exchange chromatography with pulsed amperometric detection (HPAEC-PAD). Under optimized isocratic HPAEC-PAD conditions (using 40 mmol L-1 NaOH as mobile phase, flow rate of 0.30 mL min-1 and detection potential of 0.45 V vs. Pd/PdO), the linear dynamic ranges of the concentration of amino acids obtained were 0.50-50 µmol L-1 for lysine, 1.0-100 µmol L-1 for alanine, glycine and serine, and 5.0-100 µmol L-1 for leucine. The limits of detection (S/N = 3) obtained ranged from 0.10 (for lysine and leucine) to 0.50 µmol L-1 (for alanine, glycine and serine) and sensitivity varied from 6.1 (for leucine) to 21.5 nA µmol-1 L (for serine). The average recovery percentages ranged from 97% (for glycine) to 102% (for leucine and serine). The results obtained showed that the CuNPs-RGO/GCE has good long-term stability, repeatability and reproducibility; this makes the device suitable for application as an electrochemical detector. The successful application of the proposed method for the analysis of sugarcane vinasse demonstrates its suitability for separation and determination of amino acids in complex matrices.
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Affiliation(s)
- José Luiz da Silva
- Analytical Chemistry Department, Institute of Chemistry, São Paulo State University (UNESP), Araraquara 14800-060, São Paulo State, Brazil; Bioenergy Research Institute, São Paulo State University (UNESP), Araraquara 14800-060, São Paulo State, Brazil.
| | - José Rodrigues Delfino
- Analytical Chemistry Department, Institute of Chemistry, São Paulo State University (UNESP), Araraquara 14800-060, São Paulo State, Brazil; Bioenergy Research Institute, São Paulo State University (UNESP), Araraquara 14800-060, São Paulo State, Brazil
| | - Nelson Ramos Stradiotto
- Analytical Chemistry Department, Institute of Chemistry, São Paulo State University (UNESP), Araraquara 14800-060, São Paulo State, Brazil; Bioenergy Research Institute, São Paulo State University (UNESP), Araraquara 14800-060, São Paulo State, Brazil
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15
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Zhou J, Xing C, Zhai Y, Xu W, Zhao Y, Geng K, Hou H. Influence of a Substituted Methyl on the Photoresponsive Third-Order Nonlinear-Optical Properties Based on Azobenzene Metal Complexes. Inorg Chem 2021; 60:7240-7249. [PMID: 33899484 DOI: 10.1021/acs.inorgchem.1c00331] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
For studying the effect of a substituted group on the photoresponsive third-order nonlinear-optical (NLO) properties, photosensitive azobenzene derivative H2L1 was first selected to construct metal complexes {[Zn2(L1)2(H2O)3]·2DMA)}n (1) and {[Cd(L1)(4,4'-bpy)H2O]·H2O}n (2). Then H2L2 with a substituted methyl on the azobenzene ring was used to construct complexes {[Zn(L2)(4,4'-bpy)(H2O)]}n (3) and {[Cd(L2)(4,4'-bpy)(H2O)]}n (4). When the azobenzene moiety of the complexes is trans, the NLO behaviors of the complexes are the same. However, after the azobenzene moiety is excited by ultraviolet (UV) light to change from trans to cis, the substituted methyl increases the repulsion between two azobenzene rings in 3 and 4, thereby affecting their NLO behaviors. Therefore, the nonlinearity of the two types of complexes is different after UV irradiation. Density functional theory calculations support this result. The substituted methyl has a significant influence on the nonlinear absorption behaviors of 3 and 4. This work not only reports the examples of photoresponsive NLO materials based on metal complexes but also provides a new idea to deeply explore NLO properties.
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Affiliation(s)
- Jiachao Zhou
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Chang Xing
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Yali Zhai
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Wenjuan Xu
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Yujie Zhao
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Kangshuai Geng
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Hongwei Hou
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
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16
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Cao P, Wu J. Self-Assembly of MoS 2 Monolayer Sheets by Desulfurization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:4971-4983. [PMID: 33858139 DOI: 10.1021/acs.langmuir.1c00369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Self-assembled structures of two-dimensional (2D) materials exhibit novel physical properties distinct from those of their parent materials. Herein, the critical role of desulfurization on the self-assembled structural morphologies of molybdenum disulfide (MoS2) monolayer sheets is explored using molecular dynamics (MD) simulations. MD results show that there are differences in the atomic energetics of MoS2 monolayer sheets with different desulfurization contents. Both free-standing and substrate-hosted MoS2 monolayer sheets show diversity in structural morphologies, for example, flat plane structures, wrinkles, nanotubes, and folds, depending on the desulfurization contents, planar dimensions, and ratios of length to width of MoS2 sheets. Particularly, at the critical desulfurization content, they can roll up into nanotubes, which is in good agreement with previous experimental observations. Importantly, these observed differences in the molecular structural morphologies between free-standing and substrate-hosted MoS2 monolayer sheets can be attributed to interatomic interactions and interlayer van der Waals interactions. Furthermore, MD results have demonstrated that the surface-driven stability of MoS2 structures can be indicated by the desulfurization contents on one surface of MoS2 monolayer sheets, and the self-assembly of MoS2 monolayer sheets by desulfurization can emerge to adjust their surface-driven stability. The study provides important atomic insights into tuning the self-assembling structural morphologies of 2D materials through defect engineering in the future science and engineering applications.
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Affiliation(s)
- Pinqiang Cao
- School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, P. R. China
- Department of Physics, Research Institute for Biomimetics and Soft Matter, Jiujiang Research Institute, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Xiamen University, Xiamen 361005, P. R. China
| | - Jianyang Wu
- Department of Physics, Research Institute for Biomimetics and Soft Matter, Jiujiang Research Institute, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Xiamen University, Xiamen 361005, P. R. China
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Shariare MH, Masum AA, Alshehri S, Alanazi FK, Uddin J, Kazi M. Preparation and Optimization of PEGylated Nano Graphene Oxide-Based Delivery System for Drugs with Different Molecular Structures Using Design of Experiment (DoE). Molecules 2021; 26:1457. [PMID: 33800115 PMCID: PMC7962195 DOI: 10.3390/molecules26051457] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 02/23/2021] [Accepted: 02/26/2021] [Indexed: 12/03/2022] Open
Abstract
Graphene oxide (GO), due to its 2D planar structure and favorable physical and chemical properties, has been used in different fields including drug delivery. This study aimed to investigate the impact of different process parameters on the average size of drug-loaded PEGylated nano graphene oxide (NGO-PEG) particles using design of experiment (DoE) and the loading of drugs with different molecular structures on an NGO-PEG-based delivery system. GO was prepared from graphite, processed using a sonication method, and functionalized using PEG 6000. Acetaminophen (AMP), diclofenac (DIC), and methotrexate (MTX) were loaded onto NGO-PEG particles. Drug-loaded NGO-PEG was then characterized using dynamic light scattering (DLS), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), XRD. The DLS data showed that the drug-loaded NGO-PEG suspensions were in the size range of 200 nm-1.3 µm. The sonication time and the stirring rate were found to be the major process parameters which affected the average size of the drug-loaded NGO-PEG. FTIR, DSC, XRD, and SEM demonstrated that the functionalization or coating of the NGO occurred through physical interaction using PEG 6000. Methotrexate (MTX), with the highest number of aromatic rings, showed the highest loading efficiency of 95.6% compared to drugs with fewer aromatic rings (diclofenac (DIC) 70.5% and acetaminophen (AMP) 65.5%). This study suggests that GO-based nano delivery systems can be used to deliver drugs with multiple aromatic rings with a low water solubility and targeted delivery (e.g., cancer).
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Affiliation(s)
- Mohammad Hossain Shariare
- Department of Pharmaceutical Sciences, North South University, Dhaka 1229, Bangladesh; (M.H.S.); (A.-A.M.)
| | - Abdullah-Al Masum
- Department of Pharmaceutical Sciences, North South University, Dhaka 1229, Bangladesh; (M.H.S.); (A.-A.M.)
| | - Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (S.A.); (F.K.A.)
| | - Fars K. Alanazi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (S.A.); (F.K.A.)
| | - Jamal Uddin
- Center for Nanotechnology, Department of Natural Sciences, Coppin State University, Baltimore, MD 21216, USA;
| | - Mohsin Kazi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (S.A.); (F.K.A.)
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18
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Sarmiento V, Lockett M, Sumbarda-Ramos EG, Vázquez-Mena O. High performance Pb+2 detection using CVD-produced high quality multilayer reduced graphene oxide. NANO EXPRESS 2021. [DOI: 10.1088/2632-959x/abe057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Detection of heavy metals such as Pb+2 is critical due to their high toxicity as even trace amounts of them pose a serious detrimental risk to human health. Pb2+ is one of the major toxic and persistent pollutants generated from industry and commonly found in soil, drinking water, and aquatic environments. Due to its high-mobility and one-atom thickness, graphene (Gr) based materials have shown great potential for chemical sensors of heavy metals. Recently, a novel conductive reduced-GO obtained by chemical vapor deposition (CVD-rMGO) showed improved layering structure and conductivity over conventional rGO based on chemically exfoliated flakes. Herein, utilizing this novel rGO obtained from chemical vapor deposition, we showed improved Pb2+ detection using both electrochemical and conductivity sensing. For electrochemical sensing, a CVD-rMGO film is used as working electrode and cyclic voltammetry is used to detect Pb+2 ions accumulated on the CVD-rMGO, obtaining a sensitivity of 4.6 nA nM−1cm−2 and a calculated limit of detection of 0.21 nM. For electrical sensing, the drain current through a CVD-rMGO was monitored as the film as exposed to different concentrations of Pb+2, reaching an estimated limit of detection of 0.101 nM. This work shows that high-quality reduced graphene oxide produced by chemical vapor deposition can serve as a basis enable high-sensitivity detectors of Pb2+.
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Souleymanou MY, El‐Ouahabi F, Masdeu‐Bultó AM, Godard C. Cooperative NHC‐based Catalytic System Immobilised onto Carbon Materials for the Cycloaddition of CO
2
to Epoxides. ChemCatChem 2021. [DOI: 10.1002/cctc.202001816] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Myriam Y. Souleymanou
- Department de Química Física i Inorgànica Universitat Rovira I Virgili C/ Marcel.lí Domingo s/n 43007 Tarragona Spain
| | - Fatima El‐Ouahabi
- Department de Química Física i Inorgànica Universitat Rovira I Virgili C/ Marcel.lí Domingo s/n 43007 Tarragona Spain
| | - Anna M. Masdeu‐Bultó
- Department de Química Física i Inorgànica Universitat Rovira I Virgili C/ Marcel.lí Domingo s/n 43007 Tarragona Spain
| | - Cyril Godard
- Department de Química Física i Inorgànica Universitat Rovira I Virgili C/ Marcel.lí Domingo s/n 43007 Tarragona Spain
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20
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Sun L, Chai K, Zhou L, Liao D, Ji H. One-pot fabrication of lignin-based aromatic porous polymers for efficient removal of bisphenol AF from water. Int J Biol Macromol 2021; 175:396-405. [PMID: 33545182 DOI: 10.1016/j.ijbiomac.2021.01.215] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 01/29/2021] [Accepted: 01/30/2021] [Indexed: 02/06/2023]
Abstract
To remove the bisphenol AF (BPAF) from aqueous solution, two different types of lignin-based aromatic porous polymers (LAPP-1 and LAPP-2) were fabricated via one-pot crosslinking of lignin with 1,4-dichloroxylene and 4,4'-bis(chloromethyl)-1,1'-biphenyl, respectively. The successful synthesis of LAPPs was confirmed by FTIR and XPS, SEM, TEM and N2 adsorption-desorption analysis. Then, batch adsorption experiments were conducted to investigate adsorption properties toward BPAF. Based on the results, the adsorption processes were in accordance with the pseudo-second-order kinetic model and the Freundlich isotherm model, and the thermodynamic studies showed that the adsorption was a spontaneous and exothermic process. It is remarkable that LAPPs exhibited good adsorption performance in wide ranges of pH and ionic strength as well as in recycling process. Notably, compared to LAPP-1, LAPP-2 exhibited higher adsorption capacity for BPAF, which can be ascribed to its higher porosity and content of aromatic ring. Moreover, the comprehensive analysis of experimental and theoretical results indicated that the π-π interactions and pore adsorption may jointly drive the uptake process of BPAF. Considering the simple fabrication method employed and excellent BPAF adsorption performance, LAPPs provided new insights into the development of advanced lignin-based adsorbents for removal of BPAF from water.
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Affiliation(s)
- Luyan Sun
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China
| | - Kungang Chai
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China
| | - Liqin Zhou
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China
| | - Dankui Liao
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China.
| | - Hongbing Ji
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China; Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, PR China; School of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, PR China.
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21
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da Silva Alves DC, Healy B, Pinto LADA, Cadaval TRS, Breslin CB. Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments. Molecules 2021; 26:594. [PMID: 33498661 PMCID: PMC7866017 DOI: 10.3390/molecules26030594] [Citation(s) in RCA: 87] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/18/2021] [Accepted: 01/21/2021] [Indexed: 12/18/2022] Open
Abstract
The quality of water is continuously under threat as increasing concentrations of pollutants escape into the aquatic environment. However, these issues can be alleviated by adsorbing pollutants onto adsorbents. Chitosan and its composites are attracting considerable interest as environmentally acceptable adsorbents and have the potential to remove many of these contaminants. In this review the development of chitosan-based adsorbents is described and discussed. Following a short introduction to the extraction of chitin from seafood wastes, followed by its conversion to chitosan, the properties of chitosan are described. Then, the emerging chitosan/carbon-based materials, including magnetic chitosan and chitosan combined with graphene oxide, carbon nanotubes, biochar, and activated carbon and also chitosan-silica composites are introduced. The applications of these materials in the removal of various heavy metal ions, including Cr(VI), Pb(II), Cd(II), Cu(II), and different cationic and anionic dyes, phenol and other organic molecules, such as antibiotics, are reviewed, compared and discussed. Adsorption isotherms and adsorption kinetics are then highlighted and followed by details on the mechanisms of adsorption and the role of the chitosan and the carbon or silica supports. Based on the reviewed papers, it is clear, that while some challenges remain, chitosan-based materials are emerging as promising adsorbents.
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Affiliation(s)
- Daniele C. da Silva Alves
- Department of Chemistry, Maynooth University, W23 F2H6 Maynooth, Co. Kildare, Ireland; (D.C.d.S.A.); (B.H.)
- School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, RS 96203-900, Brazil; (L.A.d.A.P.); (T.R.S.C.J.)
| | - Bronach Healy
- Department of Chemistry, Maynooth University, W23 F2H6 Maynooth, Co. Kildare, Ireland; (D.C.d.S.A.); (B.H.)
| | - Luiz A. de Almeida Pinto
- School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, RS 96203-900, Brazil; (L.A.d.A.P.); (T.R.S.C.J.)
| | - Tito R. Sant’Anna Cadaval
- School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, RS 96203-900, Brazil; (L.A.d.A.P.); (T.R.S.C.J.)
| | - Carmel B. Breslin
- Department of Chemistry, Maynooth University, W23 F2H6 Maynooth, Co. Kildare, Ireland; (D.C.d.S.A.); (B.H.)
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22
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Jain VP, Chaudhary S, Sharma D, Dabas N, Lalji RSK, Singh BK, Jaiswar G. Advanced functionalized nanographene oxide as a biomedical agent for drug delivery and anti-cancerous therapy: A review. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2020.110124] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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23
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Graphene-laden hydrogels: A strategy for thermally triggered drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 118:111353. [PMID: 33254973 DOI: 10.1016/j.msec.2020.111353] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/08/2020] [Accepted: 07/30/2020] [Indexed: 12/23/2022]
Abstract
The synthesis of graphene-based materials has attracted considerable attention in drug delivery strategies. Indeed, the conductivity and mechanical stability of graphene have been investigated for controlled and tunable drug release via electric or mechanical stimuli. However, the design of a thermo-sensitive scaffold using pristine graphene (without distortions related to the oxidation processes) has not been deeply investigated yet, although it may represent a promising approach for several therapeutic treatments. Here, few-layer graphene was used as a nanofiller in a hydrogel system with a thermally tunable drug release profile. In particular, varying the temperature (25 °C, 37 °C and 44 °C), responsive drug releases were noticed and hypothesized depending on the formation and perturbation of π-π interactions involving graphene, the polymeric matrix and the model drug (diclofenac). As a result, these hybrid hydrogels show a potential application as thermally triggered drug release systems in several healthcare scenarios.
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24
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Gao Y, Qin Y, Xiong F, Zhao L. Determination of trace polycyclic aromatic hydrocarbons in water and milk using solid‐phase extraction packed with graphene/chitosan composite aerogel prior to gas chromatography–mass spectrometry. J Sep Sci 2020; 43:3940-3948. [DOI: 10.1002/jssc.202000448] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 08/07/2020] [Accepted: 08/11/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Yuanji Gao
- College of Chemistry and Materials Science Sichuan Normal University Chengdu P. R. China
- Department of Chemistry Zhejiang University Hangzhou P. R. China
| | - Yunan Qin
- College of Chemistry and Materials Science Sichuan Normal University Chengdu P. R. China
| | - Feng Xiong
- Shenzhen Jinyu Biotechnology Co., Ltd. Shenzhen P. R. China
| | - Lijuan Zhao
- College of Chemistry and Materials Science Sichuan Normal University Chengdu P. R. China
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25
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Wang K, Paulus B. Tuning the binding energy of excitons in the MoS 2 monolayer by molecular functionalization and defective engineering. Phys Chem Chem Phys 2020; 22:11936-11942. [PMID: 32409806 DOI: 10.1039/d0cp01239d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
First-principle calculations within many-body perturbation theory are carried out to investigate the influence of the adsorbed molecules and sulfur (S) defects on the electronic and optical properties of the MoS2 monolayer. The exciton binding energy in the range of 0.05 eV to 1.14 eV is observed as a function of molecular coverage, when NO and 1,3,5-triazin (C3H3N3) are adsorbed on the pristine surface. These results can be explained by the interaction between the exciton and the adsorbed molecule. Furthermore, the combined effect of molecular functionalization and defective doping is studied. Our results show that both the electronic and optical band gaps of the MoS2 monolayer strongly depend on the molecular species and the defective coverage, and can be tuned up to ∼2 eV. This work demonstrates the great potential of controlling the MoS2 monolayer's excitonic properties by molecular functionalization and defective engineering.
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Affiliation(s)
- Kangli Wang
- Institut für Chemie und Biochemie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany.
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26
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Paredes-Doig AL, Pinedo-Flores A, Aylas-Orejón J, Obregón-Valencia D, Sun Kou MR. The interaction of metallic ions onto activated carbon surface using computational chemistry software. ADSORPT SCI TECHNOL 2020. [DOI: 10.1177/0263617420919234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Activated carbon was prepared from the seeds of aguaje palm ( Mauritia flexuosa L.f.) by a chemical activation with phosphoric acid. This activated carbon was used for adsorbing metal ions: Pb(II), Cd(II), and Cr(III). To understand the mechanism of adsorption of these heavy metals (Cr, Cd, and Pb), the activated carbon surface was oxidized with nitric acid (1 M) increasing the oxygenated surface groups showing an increasing in their adsorption capacities of these metals. The oxidized activated carbon slightly increased the maximum adsorption capacity to 5–7%. The order of adsorption for unoxidized and oxidized activated carbons was Pb> Cd> Cr. This experimental information was corroborated by molecular modeling program Hyperchem 8 based adsorption mainly on two factors: the electron density and orbitals—highest occupied molecular orbital and lowest unoccupied molecular orbital.Activated carbons were characterized by adsorption/desorption of N2, obtaining an increase of microporous surface area for oxidized activated carbon. An increase of surface acidity and a reduction of isoelectric points were observed in oxidized activated carbon. According to these results, the adsorption of metal ions is favored in contact with an oxidized activated carbon, which has more amount of phenolic and carboxylic functional groups. Similarly, decreasing the isoelectric point indicates that the surface has a higher negative charge. The surface information was corroborated by Hyperchem, which indicates that the surface of the oxidized activated carbon has a higher electron density, indicating a larger amount of electrons on its surface, which means the surface of oxidized activated carbon charges negatively and thereby attracts metal ions.
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Affiliation(s)
| | | | | | | | - MR Sun Kou
- Pontifical Catholic University of Peru, Peru
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27
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Ma C, Malessa A, Boersma AJ, Liu K, Herrmann A. Supercharged Proteins and Polypeptides. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1905309. [PMID: 31943419 DOI: 10.1002/adma.201905309] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 10/10/2019] [Indexed: 06/10/2023]
Abstract
Electrostatic interactions play a vital role in nature. Biomacromolecules such as proteins are orchestrated by electrostatics, among other intermolecular forces, to assemble and organize biochemistry. Natural proteins with a high net charge exist in a folded state or are unstructured and can be an inspiration for scientists to artificially supercharge other protein entities. Recent findings show that supercharging proteins allows for control of their properties such as temperature resistance and catalytic activity. One elegant method to transfer the favorable properties of supercharged proteins to other proteins is the fabrication of fusions. Genetically engineered, supercharged unstructured polypeptides (SUPs) are just one promising fusion tool. SUPs can also be complexed with artificial entities to yield thermotropic and lyotropic liquid crystals and liquids. These architectures represent novel bulk materials that are sensitive to external stimuli. Interestingly, SUPs undergo fluid-fluid phase separation to form coacervates. These coacervates can even be directly generated in living cells or can be combined with dissipative fiber assemblies that induce life-like features. Supercharged proteins and SUPs are developed into exciting classes of materials. Their synthesis, structures, and properties are summarized. Moreover, potential applications are highlighted and challenges are discussed.
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Affiliation(s)
- Chao Ma
- Zernike Institute for Advanced Materials, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Anke Malessa
- Zernike Institute for Advanced Materials, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Arnold J Boersma
- DWI - Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, 52056, Aachen, Germany
| | - Kai Liu
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022, Changchun, China
| | - Andreas Herrmann
- Zernike Institute for Advanced Materials, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
- DWI - Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, 52056, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 2, 52074, Aachen, Germany
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28
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Yu X, Hayden EY, Wang P, Xia M, Liang O, Bai Y, Teplow DB, Xie YH. Ultrasensitive amyloid β-protein quantification with high dynamic range using a hybrid graphene-gold surface-enhanced Raman spectroscopy platform. JOURNAL OF RAMAN SPECTROSCOPY : JRS 2020; 51:432-441. [PMID: 33688113 PMCID: PMC7938713 DOI: 10.1002/jrs.5785] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 10/13/2019] [Indexed: 05/30/2023]
Abstract
Surface enhanced Raman spectroscopy (SERS) holds great promise in biosensing because of its single-molecule, label-free sensitivity. We describe here the use of a graphene-gold hybrid plasmonic platform that enables quantitative SERS measurement. Quantification is enabled by normalizing analyte peak intensities to that of the graphene G peak. We show that two complementary quantification modes are intrinsic features of the platform, and that through their combined use, the platform enables accurate determination of analyte concentration over a concentration range spanning seven orders of magnitude. We demonstrate, using a biologically relevant test analyte, the amyloid β-protein (Aβ), a seminal pathologic agent of Alzheimer's disease (AD), that linear relationships exist between (a) peak intensity and concentration at a single plasmonic hot spot smaller than 100 nm, and (b) frequency of hot spots with observable protein signals, i.e. the co-location of an Aβ protein and a hot spot. We demonstrate the detection of Aβ at a concentration as low as 10-18 M after a single 20 μl aliquot of the analyte onto the hybrid platform. This detection sensitivity can be improved further through multiple applications of analyte to the platform and by rastering the laser beam with smaller step sizes.
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Affiliation(s)
- Xinke Yu
- Department of Materials Science and Engineering, University of California, Los Angeles California, 90095, United States
| | - Eric Y. Hayden
- Department of Neurology, David Geffen School of Medicine at UCLA, University of California, Los Angeles, California, 90095, United States
| | - Pu Wang
- Department of Materials Science and Engineering, University of California, Los Angeles California, 90095, United States
| | - Ming Xia
- Department of Materials Science and Engineering, University of California, Los Angeles California, 90095, United States
| | - Owen Liang
- Department of Materials Science and Engineering, University of California, Los Angeles California, 90095, United States
| | - Yu Bai
- School of Nano-Science and Nano-Engineering, Suzhou & Collaborative Innovation Center of Suzhou Nano Science and Technology, Xi’an Jiaotong University, Xi’an 710049, PR China
| | - David B. Teplow
- Department of Neurology, David Geffen School of Medicine at UCLA, University of California, Los Angeles, California, 90095, United States
| | - Ya-Hong Xie
- Department of Materials Science and Engineering, University of California, Los Angeles California, 90095, United States
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles, California, 90095, United States
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29
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Nisha S, Lakshminarayanan V, Senthil Kumar A. Electrochemical Reaction Assisted 2D π-Stacking of Benzene on a MWCNT Surface and its Unique Redox and Electrocatalytic Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9-19. [PMID: 31825230 DOI: 10.1021/acs.langmuir.9b01970] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Turning the π-structure and electronic properties of carbon nanotubes (CNTs) is a cutting-edge research topic in interdisciplinary areas of material chemistry. In general, chemical functionalization of CNT has been adopted for this purpose, which has resulted in a few monolayer thickness increment of CNT diameter size. Herein, we report an interesting observation of >10-fold increment in the apparent diameter of multiwalled carbon nanotubes (MWCNTs) brought about by a process of self-assembly of the BZ moiety on MWCNT, which is formed by electrochemical oxidation of a surface-adsorbed benzene-water cluster, {BZ-nH2O}. From physicochemical characterizations by transmission electron microscopy (TEM) and Raman and IR spectroscopic techniques and electrochemical characterizations by several radical scavenger species, it has been revealed that benzene radical moieties as a series of π-stacked layers ([BZ]-π-stack) were self-assembled on the MWCNT surface. A possible mechanism for their formation was proposed to be electrochemical oxidation of H2O from the MWCNT@{BZ-nH2O}ads layer to oxygen gas via hydroxyl radical formation and benzene cationic radical species at 1.2 V vs Ag/AgCl followed by its self-assembly into a unique MWCNT@[BZ]-π-stack network. The scanning electrochemical microscopic (SECM) technique was used to identify the in situ •OH radical formation. The electrochemical studies of a glassy-carbon-modified MWCNT@[BZ]-π-stack system showed a well-defined and highly symmetrical redox peak at an equilibrium potential E1/2 = 0.2 V vs Ag/AgCl (pH 2 HCl/KCl), with a peak-to-peak potential separation of 0 V, highlighting the ideal-surface-confined electron-transfer nature of the redox couple. Furthermore, enhanced electrical conductivity over the unmodified MWCNT was observed when testing the surface-sensitive redox couple Fe3+/Fe2+ with the modified electrode. This new redox material showed a specific electrocatalytic reduction of hydrogen peroxide at neutral pH (pH 7 phosphate buffer solution) unlike the quinone and other organic redox mediators, which show the reduction signal only in the presence of horseradish peroxidase enzyme.
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Affiliation(s)
| | - V Lakshminarayanan
- Soft and Condensed Matter , Raman Research Institute , C. V. Raman Avenue, Sadashivanagar , Bengaluru 560 080 , India
| | - Annamalai Senthil Kumar
- Soft and Condensed Matter , Raman Research Institute , C. V. Raman Avenue, Sadashivanagar , Bengaluru 560 080 , India
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Hadi R, Abbasi H, Payami E, Ahadzadeh I, Teimuri‐Mofrad R. Synthesis, Characterization and Electrochemical Properties of 4‐Azidobutylferrocene‐Grafted Reduced Graphene Oxide‐Polyaniline Nanocomposite for Supercapacitor Applications. ChemistrySelect 2020. [DOI: 10.1002/slct.201903726] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Raha Hadi
- Department of Organic and Biochemistry, Faculty of Chemistry University of Tabriz 29 Bahman Blvd., Tabriz Iran
| | - Hassan Abbasi
- Department of Organic and Biochemistry, Faculty of Chemistry University of Tabriz 29 Bahman Blvd., Tabriz Iran
| | - Elmira Payami
- Department of Organic and Biochemistry, Faculty of Chemistry University of Tabriz 29 Bahman Blvd., Tabriz Iran
| | - Iraj Ahadzadeh
- Department of Physical Chemistry Faculty of Chemistry University of Tabriz 29 Bahman Blvd., Tabriz Iran
| | - Reza Teimuri‐Mofrad
- Department of Organic and Biochemistry, Faculty of Chemistry University of Tabriz 29 Bahman Blvd., Tabriz Iran
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31
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Facile fabrication of biosensors based on Cu nanoparticles modified as-grown CVD graphene for non-enzymatic glucose sensing. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.113527] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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32
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Martín-de-Lucía I, Gonçalves SF, Leganés F, Fernández-Piñas F, Rosal R, Loureiro S. Combined toxicity of graphite-diamond nanoparticles and thiabendazole to Daphnia magna. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 688:1145-1154. [PMID: 31726545 DOI: 10.1016/j.scitotenv.2019.06.316] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/21/2019] [Accepted: 06/20/2019] [Indexed: 06/10/2023]
Abstract
Carbon-based nanomaterials exhibit unique properties that make them suitable for a wide variety of industrial and biomedical applications. In this work, we studied the acute toxicity of graphite-diamond nanoparticles (GDN) combined with the fungicide thiabendazole (TBZ) to the immobilization of the cladoceran Daphnia magna in the presence and absence of the micro green algae Raphidocelis subcapitata, supplied as food source. The toxicity of GDN to D. magna decreased in the presence of R. subcapitata, while that of TBZ increased, the latter suggesting a carrier effect to TBZ. GDN-TBZ mixtures were fitted to the most common conceptual models applied to mixture toxicity: Concentration Addition (CA), Independent Action (IA) and Combination Index (CI). For GDN-TBZ mixtures in the absence of food the best fit was obtained with dose ratio deviation from CA model, while in the presence of food, dose level deviation from CA gave a better fit. The binary mixtures of GDN and TBZ showed synergistic toxic interactions at low concentrations, which could be attributed to the increased bioavailability of TBZ adsorbed on GDN. For higher concentrations of GDN, the binary mixtures turned antagonistic due to particle agglomeration. Our study provides evidence that deviations from additivity are dose dependent and relevant for the risk assessment of mixtures of nanoparticles with other chemical pollutants.
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Affiliation(s)
- Idoia Martín-de-Lucía
- Department of Chemical Engineering, University of Alcalá, E-28871 Alcalá de Henares, Madrid, Spain
| | - Sandra F Gonçalves
- Department of Biology & CESAM, University of Aveiro, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal
| | - Francisco Leganés
- Department of Biology, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
| | | | - Roberto Rosal
- Department of Chemical Engineering, University of Alcalá, E-28871 Alcalá de Henares, Madrid, Spain.
| | - Susana Loureiro
- Department of Biology & CESAM, University of Aveiro, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal.
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Guo F, Wang Z, Zhao L, Liu W. A proposed method of enantioselectivity analysis for residual chiral PCBs in gas chromatography. CHEMOSPHERE 2019; 229:401-408. [PMID: 31082707 DOI: 10.1016/j.chemosphere.2019.04.162] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 03/26/2019] [Accepted: 04/21/2019] [Indexed: 06/09/2023]
Abstract
Polychlorinated biphenyls (PCBs) are harmful and persistent organic pollutants. The influence of chiral PCBs acts mainly on the different enantiomer fraction, bioaccumulation and even degradation in environmental media. Solvents and temperatures existed almost everywhere during the analysis of extraction, purification, concentration and detection, which was often underestimated in previous studies. In our study, the configuration stability of the chiral PCBs was examined from solvent and temperature aspects. Transformation phenomena for the analytic stereoisomer monomers of PCB45, PCB95, and PCB149 affected by temperature were observed. We demonstrated that higher inlet temperatures could increase the sensibility for the low-concentration environmental samples, resulting in isomerization of chiral PCBs. Real rice samples were used to verify our analysis method. Combined with density functional theory, we verified the mechanism of isomer conversion with various numbers and sites of the -Cl substituent. PCBs with tetra-ortho substituents (2, 2', 6, 6') were relatively stable and showed the highest rotational barriers (Ea) at approximate 240 kJ mol-1. Others with trio-ortho substituents (2, 2', 6/6') showed Ea from 170 to 190 kJ mol-1, whose enantiomeric fractions would be affected by temperature during the analysis process for environmental detection. The method we developed was a promising means to understand the mechanism of isomerization and to predict stabilities of chiral PCBs.
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Affiliation(s)
- Fangjie Guo
- MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Zhongyu Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Lu Zhao
- MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Weiping Liu
- MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
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Arroyo N, Herlem G, Picaud F. Ligand nanovectorization using graphene to target cellular death receptors of cancer cell. Proteins 2019; 88:94-105. [DOI: 10.1002/prot.25772] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 06/11/2019] [Accepted: 07/06/2019] [Indexed: 02/04/2023]
Affiliation(s)
- Nicolas Arroyo
- Laboratoire de Nanomédecine, Imagerie et Thérapeutique, EA4662, Université Bourgogne‐Franche‐Comté (UFR Sciences et Techniques, UFR Sciences Médicales et Pharmaceutiques), Centre Hospitalier Universitaire de Besançon Besançon France
| | - Guillaume Herlem
- Laboratoire de Nanomédecine, Imagerie et Thérapeutique, EA4662, Université Bourgogne‐Franche‐Comté (UFR Sciences et Techniques, UFR Sciences Médicales et Pharmaceutiques), Centre Hospitalier Universitaire de Besançon Besançon France
| | - Fabien Picaud
- Laboratoire de Nanomédecine, Imagerie et Thérapeutique, EA4662, Université Bourgogne‐Franche‐Comté (UFR Sciences et Techniques, UFR Sciences Médicales et Pharmaceutiques), Centre Hospitalier Universitaire de Besançon Besançon France
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35
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36
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Wang Z, Gao Z, Feng S, Wang J, Guo X. Experimental and Computational Study on the Adsorption Mechanism of 2-Arylpropionic Acids on Graphene: Solvent Effects and Aromatic Features Affecting the Adsorption Performance. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00542] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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37
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Niedziałkowski P, Cebula Z, Malinowska N, Białobrzeska W, Sobaszek M, Ficek M, Bogdanowicz R, Anand JS, Ossowski T. Comparison of the paracetamol electrochemical determination using boron-doped diamond electrode and boron-doped carbon nanowalls. Biosens Bioelectron 2019; 126:308-314. [DOI: 10.1016/j.bios.2018.10.063] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 10/21/2018] [Accepted: 10/30/2018] [Indexed: 11/16/2022]
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38
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Synthesis and characterization of ferrocene-functionalized reduced graphene oxide nanocomposite as a supercapacitor electrode material. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2018.11.033] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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39
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Heard KW, Bartlam C, Williams CD, Zhang J, Alwattar AA, Little MS, Parry AVS, Porter FM, Vincent MA, Hillier IH, Siperstein FR, Vijayaraghavan A, Yeates SG, Quayle P. Initial Studies Directed toward the Rational Design of Aqueous Graphene Dispersants. ACS OMEGA 2019; 4:1969-1981. [PMID: 31459448 PMCID: PMC6648898 DOI: 10.1021/acsomega.8b03147] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 12/14/2018] [Indexed: 05/31/2023]
Abstract
This study presents preliminary experimental data suggesting that sodium 4-(pyrene-1-yl)butane-1-sulfonate (PBSA), 5, an analogue of sodium pyrene-1-sulfonate (PSA), 1, enhances the stability of aqueous reduced graphene oxide (RGO) graphene dispersions. We find that RGO and exfoliated graphene dispersions prepared in the presence of 5 are approximately double the concentration of those made with commercially available PSA, 1. Quantum mechanical and molecular dynamics simulations provide key insights into the behavior of these molecules on the graphene surface. The seemingly obvious introduction of a polar sulfonate head group linked via an appropriate alkyl spacer to the aromatic core results in both more efficient binding of 5 to the graphene surface and more efficient solvation of the polar head group by bulk solvent (water). Overall, this improves the stabilization of the graphene flakes by disfavoring dissociation of the stabilizer from the graphene surface and inhibiting reaggregation by electrostatic and steric repulsion. These insights are currently the subject of further investigations in an attempt to develop a rational approach to the design of more effective dispersing agents for rGO and graphene in aqueous solution.
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Affiliation(s)
- Kane W.
J. Heard
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Cian Bartlam
- School
of Materials and National Graphene Institute, The University of Manchester, Manchester M13 9PL, U.K.
| | - Christopher D. Williams
- School
of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Junru Zhang
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Aula A. Alwattar
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- College
of Science, University of Basrah, Garmat Ali, 61004 Basrah, Iraq
| | - Mark S. Little
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Adam V. S. Parry
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Fiona M. Porter
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Mark A. Vincent
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Ian H. Hillier
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Flor R. Siperstein
- School
of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Aravind Vijayaraghavan
- School
of Materials and National Graphene Institute, The University of Manchester, Manchester M13 9PL, U.K.
| | - Stephen G. Yeates
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Peter Quayle
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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40
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Rodríguez SJ, Albanesi EA. Electronic transport in a graphene single layer: application in amino acid sensing. Phys Chem Chem Phys 2019; 21:597-606. [PMID: 30543232 DOI: 10.1039/c8cp05093g] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We modeled a type of field-effect transistor device based on graphene for the recognition of amino acids with a potential application in the building of a protein sequencer. The theoretical model used was a combination of density functional theory (DFT) with the non-equilibrium Green's function (NEGF) in order to describe the coherent transport in molecular devices. First, we studied the physisorption of each amino acid on a graphene sheet and we reported the adsorption energy, the adsorption distances, the equilibrium configuration and the charge transfer of ten amino acids that can be considered as representative of all of the amino acids: histidine (His), alanine (Ala), aspartic acid (Asp), tyrosine (Tyr), arginine (Arg), glutamic acid (Glu), glycine (Gly), phenylalanine (Phe), proline (Pro) and lysine (Lys). As a result, significant differences were found in the density of states (DOS) after adsorption and there was a change in the semi-metallic character of the graphene due to the lysine and arginine interactions. Furthermore, we noticed changes in the electrical characteristics of the devices, as the amino acids adsorbed onto the surface of the graphene. The curves of current vs. bias voltage (I-Vb) display a distinct response for each amino acid, i.e. the I-Vb curves produce a characteristic footprint for each amino acid. We identified a possible rectification mechanism related to the voltage profile asymmetry, where the amino acids can control the transport characteristics in the device, i.e. Lys and Phe amino acids physisorbed on graphene act as a molecular diode, where electrons can easily flow in one direction and decrease in the other. This may be promising for the prospect of biosensors: graphene could be used as an amino acid detector.
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Affiliation(s)
- Sindy J Rodríguez
- Instituto de Física del Litoral (CONICET-UNL), Güemes 3450, Santa Fe, Argentina.
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41
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Surface functionalization of coal and quartz with aniline: A study on work function and frictional charge. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2018.07.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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42
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Sun XD, Shi CL, Li SH, Wang YZ, Qi DW, Wang WM, Yao HM, Wang Y, Zhu JH. New shape-selectivity discovered on graphene-based materials in catching tobacco specific nitrosamines. JOURNAL OF HAZARDOUS MATERIALS 2018; 358:234-242. [PMID: 29990811 DOI: 10.1016/j.jhazmat.2018.06.063] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 06/25/2018] [Accepted: 06/29/2018] [Indexed: 06/08/2023]
Abstract
New shape-selectivity of graphene-based materials was discovered on this article. To explore the new selectivity, the structure and surface state of graphene and carbon nanotube were examined firstly, and their specific selectivity was verified and was compared with that of ZSM-5 zeolite in aqueous solutions of tobacco specific nitrosamines (TSNA) along with dyes. These two adsorbents trapped about 55% and 70% of 4-methylnitrosamino-1-3-pyridyl-1-butanone (NNK) but only 3% of N'-nitrosonornicotine (NNN) in solution, having an obvious selectivity for the former, due to its stronger interaction with graphene. NNK on graphene sheet obtained more electrons (0.015 e) and owned larger adsorption energy (15.63 kcal mol-1) than that of NNN (0.003 e, 9.19 kcal mol-1), according to theoretical calculation and FTIR results. More 95 or 136 mg g -1 acid red 88 than methyl orange was captured by graphene or carbon nanotube, demonstrating this special and abnormal selectivity again. With new selectivity, graphene showed a higher capacity (6.9%) and shorter adorption equilibrium time (5 min) for TSNA than the typical selecive sorbent ZSM-5 zeolite (1.7% and 20 min) in tobacco solution but kept the similar selctivity to NNK, paving a new way to control the carcinogens like TSNA in environment.
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Affiliation(s)
- Xiao Dan Sun
- Key Laboratory of Mesoscopic Chemistry of MOE, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Chun Ling Shi
- Key Laboratory of Mesoscopic Chemistry of MOE, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Shuo Hao Li
- Key Laboratory of Mesoscopic Chemistry of MOE, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yang-Zhong Wang
- Technology Centre of Shanghai Tobacco (Group) Company, Shanghai 200082, China
| | - Da-Wei Qi
- Technology Centre of Shanghai Tobacco (Group) Company, Shanghai 200082, China
| | - Wei-Miao Wang
- Technology Centre of Shanghai Tobacco (Group) Company, Shanghai 200082, China
| | - He-Ming Yao
- Technology Centre of Shanghai Tobacco (Group) Company, Shanghai 200082, China
| | - Ying Wang
- Key Laboratory of Mesoscopic Chemistry of MOE, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Jian Hua Zhu
- Key Laboratory of Mesoscopic Chemistry of MOE, College of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
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Rodd AL, Castilho CJ, Chaparro CEF, Rangel-Mendez JR, Hurt RH, Kane AB. Impact of emerging, high-production-volume graphene-based materials on the bioavailability of benzo(a)pyrene to brine shrimp and fish liver cells. ENVIRONMENTAL SCIENCE. NANO 2018; 5:2144-2161. [PMID: 31565225 PMCID: PMC6764784 DOI: 10.1039/c8en00352a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
With increasing commercialization of high volume, two-dimensional carbon nanomaterials comes a greater likelihood of environmental release. In aquatic environments, black carbon binds contaminants like aromatic hydrocarbons, leading to changes in their uptake, bioavailability, and toxicity. Engineered carbon nanomaterials can also adsorb pollutants onto their carbon surfaces, and nanomaterial physicochemical properties can influence this contaminant interaction. We used 2D graphene nanoplatelets and isometric carbon black nanoparticles to evaluate the influence of particle morphology and surface properties on adsorption and bioavailability of benzo(a)pyrene, a model aromatic hydrocarbon, to brine shrimp (Artemia franciscana) and a fish liver cell line (PLHC-1). Acellular adsorption studies show that while high surface area carbon black (P90) was most effective at a given concentration, 2D graphene nanoplatelets (G550) adsorbed more benzo(a)pyrene than carbon black with comparable surface area (M120). In both biological models, co-exposure to nanomaterials lead to reduced bioavailability, with G550 graphene nanoplatelets cause a greater reduction in bioavailability or response than the M120 carbon black nanoparticles. However, on a mass basis the high surface area P90 carbon black was most effective. The trends in bioavailability and adsorption were consistent across all biological and acellular studies, demonstrating the biological relevance of these results in different models of aquatic organisms. While adsorption is limited by surface area, 2D graphene nanoplatelets adsorb more benzo(a)pyrene than carbon black nanoparticles of similar surface area and charge, demonstrating that both surface area and shape play important roles in the adsorption and bioavailability of benzo(a)pyrene to carbon nanomaterials.
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Affiliation(s)
- April L Rodd
- Department of Pathology & Laboratory Medicine, Brown University, Providence, RI, 02912
| | | | - Carlos EF Chaparro
- Division of Environmental Science, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí, 78216, Mexico
| | - J Rene Rangel-Mendez
- Division of Environmental Science, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí, 78216, Mexico
| | - Robert H Hurt
- School of Engineering, Brown University, Providence, RI, 02912
| | - Agnes B Kane
- Department of Pathology & Laboratory Medicine, Brown University, Providence, RI, 02912
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Kalashnyk N, Jaouen M, Fiorini-Debuisschert C, Douillard L, Attias AJ, Charra F. Electronic effects of the Bernal stacking of graphite on self-assembled aromatic adsorbates. Chem Commun (Camb) 2018; 54:9607-9610. [PMID: 30094435 DOI: 10.1039/c8cc05806g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
We compare by Scanning Tunneling Microscopy (STM) self-organized honeycomb monolayers of aromatic molecules formed either on graphite or on graphene. A differential contrast between the adsorption sites observed exclusively on graphite evidences the electronic effects of the symmetry breaking by the staggered atomic layers forming this substrate.
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Affiliation(s)
- Nataliya Kalashnyk
- SPEC, CEA, CNRS, UMR 3680, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France.
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45
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Wang L, Miao L, Yang H, Xu L, Peng C. Three-dimensional kenaf stem-derived macroporous carbon/reduced graphene oxide/polyaniline integrated electrode for supercapacitors. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.06.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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46
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Smith RS, Kay BD. Desorption of Benzene, 1,3,5-Trifluorobenzene, and Hexafluorobenzene from a Graphene Surface: The Effect of Lateral Interactions on the Desorption Kinetics. J Phys Chem Lett 2018; 9:2632-2638. [PMID: 29724099 DOI: 10.1021/acs.jpclett.8b00986] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The desorption of benzene, 1,3,5-trifluorobenzene (TFB), and hexafluorobenzene (HFB) from a graphene covered Pt(111) substrate was investigated using temperature-programmed desorption (TPD). All three species have well-resolved monolayer and second-layer desorption peaks. The desorption spectra for submonolayer coverages of benzene and HFB are consistent with first-order desorption kinetics. In contrast, the submonolayer TPD spectra for TFB align on a common leading-edge, which is indicative of zero-order desorption kinetics. The desorption behavior of the three molecules can be correlated with the strength of the quadrupole moments. Calculations (second-order Møller-Plesset perturbation and density functional theory) show that the potential minimum for coplanar TFB dimers is more than a factor of 2 greater than that for either benzene or HFB dimers. The calculations support the interpretation that benzene and HFB are less likely to form the two-dimensional islands that are needed for submonolayer zero-order desorption kinetics.
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Affiliation(s)
- R Scott Smith
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - Bruce D Kay
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
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47
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Kolanthai E, Sindu PA, Khajuria DK, Veerla SC, Kuppuswamy D, Catalani LH, Mahapatra DR. Graphene Oxide-A Tool for the Preparation of Chemically Crosslinking Free Alginate-Chitosan-Collagen Scaffolds for Bone Tissue Engineering. ACS APPLIED MATERIALS & INTERFACES 2018; 10:12441-12452. [PMID: 29589895 DOI: 10.1021/acsami.8b00699] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Developing a biodegradable scaffold remains a major challenge in bone tissue engineering. This study was aimed at developing novel alginate-chitosan-collagen (SA-CS-Col)-based composite scaffolds consisting of graphene oxide (GO) to enrich porous structures, elicited by the freeze-drying technique. To characterize porosity, water absorption, and compressive modulus, GO scaffolds (SA-CS-Col-GO) were prepared with and without Ca2+-mediated crosslinking (chemical crosslinking) and analyzed using Raman, Fourier transform infrared (FTIR), X-ray diffraction (XRD), and scanning electron microscopy techniques. The incorporation of GO into the SA-CS-Col matrix increased both crosslinking density as indicated by the reduction of crystalline peaks in the XRD patterns and polyelectrolyte ion complex as confirmed by FTIR. GO scaffolds showed increased mechanical properties which were further increased for chemically crosslinked scaffolds. All scaffolds exhibited interconnected pores of 10-250 μm range. By increasing the crosslinking density with Ca2+, a decrease in the porosity/swelling ratio was observed. Moreover, the SA-CS-Col-GO scaffold with or without chemical crosslinking was more stable as compared to SA-CS or SA-CS-Col scaffolds when placed in aqueous solution. To perform in vitro biochemical studies, mouse osteoblast cells were grown on various scaffolds and evaluated for cell proliferation by using MTT assay and mineralization and differentiation by alizarin red S staining. These measurements showed a significant increase for cells attached to the SA-CS-Col-GO scaffold compared to SA-CS or SA-CS-Col composites. However, chemical crosslinking of SA-CS-Col-GO showed no effect on the osteogenic ability of osteoblasts. These studies indicate the potential use of GO to prepare free SA-CS-Col scaffolds with preserved porous structure with elongated Col fibrils and that these composites, which are biocompatible and stable in a biological medium, could be used for application in engineering bone tissues.
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Affiliation(s)
- Elayaraja Kolanthai
- Laboratory for Integrative Multiscale Engineering Materials and Systems, Department of Aerospace Engineering , Indian Institute of Science , Bangalore 560012 , India
- Departamento de Química Fundamental, Instituto de Química , Universityof São Paulo , Av. Prof. LineuPrestes, 784 , 05508-000 São Paulo , Brazil
| | | | - Deepak Kumar Khajuria
- Laboratory for Integrative Multiscale Engineering Materials and Systems, Department of Aerospace Engineering , Indian Institute of Science , Bangalore 560012 , India
| | - Sarath Chandra Veerla
- Laboratory for Integrative Multiscale Engineering Materials and Systems, Department of Aerospace Engineering , Indian Institute of Science , Bangalore 560012 , India
| | - Dhandapani Kuppuswamy
- Cardiology Division, Department of Medicine, Gazes Cardiac Research Institute , Medical University of South Carolina , Charleston , South Carolina 29425-2221 , United States
| | - Luiz Henrique Catalani
- Departamento de Química Fundamental, Instituto de Química , Universityof São Paulo , Av. Prof. LineuPrestes, 784 , 05508-000 São Paulo , Brazil
| | - D Roy Mahapatra
- Laboratory for Integrative Multiscale Engineering Materials and Systems, Department of Aerospace Engineering , Indian Institute of Science , Bangalore 560012 , India
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48
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Kottrup KG, D’Agostini S, van Langevelde PH, Siegler MA, Hetterscheid DGH. Catalytic Activity of an Iron-Based Water Oxidation Catalyst: Substrate Effects of Graphitic Electrodes. ACS Catal 2018; 8:1052-1061. [PMID: 29430332 PMCID: PMC5805403 DOI: 10.1021/acscatal.7b03284] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/15/2017] [Indexed: 01/23/2023]
Abstract
![]()
The
synthesis, characterization, and electrochemical studies of
the dinuclear complex [(MeOH)Fe(Hbbpya)-μ-O-(Hbbpya)Fe(MeOH)](OTf)4 (1) (with Hbbpya = N,N-bis(2,2′-bipyrid-6-yl)amine)
are described. With the help of online electrochemical mass spectrometry,
the complex is demonstrated to be active as a water oxidation catalyst.
Comparing the results obtained for different electrode materials shows
a clear substrate influence of the electrode, as the complex shows
a significantly lower catalytic overpotential on graphitic working
electrodes in comparison to other electrode materials. Cyclic voltammetry
experiments provide evidence that the structure of complex 1 undergoes reversible changes under high-potential conditions, regenerating
the original structure of complex 1 upon returning to
lower potentials. Results from electrochemical quartz crystal microbalance
experiments rule out that catalysis proceeds via deposition of catalytically
active material on the electrode surface.
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Affiliation(s)
- Konstantin G. Kottrup
- Leiden
Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Silvia D’Agostini
- Leiden
Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Phebe H. van Langevelde
- Leiden
Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Maxime A. Siegler
- Department
of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
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49
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Colonna S, Pérez-Camargo RA, Chen H, Liu G, Wang D, Müller AJ, Saracco G, Fina A. Supernucleation and Orientation of Poly(butylene terephthalate) Crystals in Nanocomposites Containing Highly Reduced Graphene Oxide. Macromolecules 2017; 50:9380-9393. [PMID: 29296028 PMCID: PMC5747490 DOI: 10.1021/acs.macromol.7b01865] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 10/23/2017] [Indexed: 11/29/2022]
Abstract
![]()
The
ring-opening polymerization of cyclic butylene terephthalate into
poly(butylene terephthalate) (pCBT) in the presence of reduced graphene
oxide (RGO) is an effective method for the preparation of polymer
nanocomposites. The inclusion of RGO nanoflakes dramatically affects
the crystallization of pCBT, shifting crystallization peak temperature
to higher temperatures and, overall, increasing the crystallization
rate. This was due to a supernucleating effect caused by RGO, which
is maximized by highly reduced graphene oxide. Furthermore, combined
analyses by differential scanning calorimetry (DSC) experiments and
wide-angle X-ray diffraction (WAXS) showed the formation of a thick
α-crystalline
form pCBT lamellae with a melting point of ∼250 °C, close
to the equilibrium melting temperature of pCBT. WAXS also demonstrated
the pair orientation of pCBT crystals with RGO nanoflakes, indicating
a strong interfacial interaction between the aromatic rings of pCBT
and RGO planes, especially with highly reduced graphene oxide.
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Affiliation(s)
- Samuele Colonna
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Alessandria 15121, Italy
| | - Ricardo A Pérez-Camargo
- POLYMAT and Polymer Science and Technology Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, Donostia-San Sebastián 20018, Spain
| | - Haiming Chen
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Guoming Liu
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Dujin Wang
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Alejandro J Müller
- POLYMAT and Polymer Science and Technology Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, Donostia-San Sebastián 20018, Spain.,IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Guido Saracco
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Alessandria 15121, Italy
| | - Alberto Fina
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Alessandria 15121, Italy
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50
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Gao J, Fang J, Ju X, Zhu W, Lin X, Zhang S, Ma C, Song H. Hierarchical Self-Assembly of Cyclodextrin and Dimethylamino-Substituted Arylene-Ethynylene on N-doped Graphene for Synergistically Enhanced Electrochemical Sensing of Dihydroxybenzene Isomers. ACS APPLIED MATERIALS & INTERFACES 2017; 9:38802-38813. [PMID: 29035499 DOI: 10.1021/acsami.7b12463] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
An electrochemically active sensing nanomaterial (denoted as CD-MPEA-NG) has been successfully constructed by an hierarchical self-assembly of cyclodextrin (CD) and N,N-dimethyl-4-(phenylethynyl)aniline (MPEA) on N-doped graphene (NG) in a low-temperature hydrothermal process. The unique nanostructure of the high-performance CD-MPEA-NG was confirmed by utilizing Fourier transform infrared spectra, an X-ray diffractometer, and differential pulse voltammetry (DPV), etc. In particular, the method of density functional theory with dispersion energy (DFT-D) of wB97XD/LanL2DZ was employed to optimize and describe the face-to-face packing structure of heterodimers of NG and MPEA. The CD-MPEA-NG sensor exhibits highly sensitive performance toward dihydroxybenzene isomers, without relying on expensive noble metal or a complicated preparation process. The experimental results demonstrate that given the synergistic effect of NG and MPEA as a coupled sensing platform, CD as a supramolecular cavity can significantly enhance the electrochemical response. The detection limits (S/N = 3) for catechol (CT), resorcinol (RS), and hydroquinone (HQ) are 0.008, 0.018, and 0.011 μM by DPV, respectively. Besides, the CD-MPEA-NG sensor shows a superb anti-interference, reproducibility, and stability, and satisfactory recovery aimed at detecting isomers in Nanjing River water. The encouraging performance as well as simplified preparation approach strongly support the CD-MPEA-NG sensor is a fascinating electrode to develop as a seamless and sensitive electroanalytical technique.
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Affiliation(s)
- Juanjuan Gao
- School of Chemical Engineering, Nanjing University of Science and Technology , Nanjing 210094, People's Republic of China
| | - Jingkun Fang
- School of Chemical Engineering, Nanjing University of Science and Technology , Nanjing 210094, People's Republic of China
| | - Xuehai Ju
- School of Chemical Engineering, Nanjing University of Science and Technology , Nanjing 210094, People's Republic of China
| | - Weiqing Zhu
- School of Chemical Engineering, Nanjing University of Science and Technology , Nanjing 210094, People's Republic of China
| | - Xuezhen Lin
- School of Chemical Engineering, Nanjing University of Science and Technology , Nanjing 210094, People's Republic of China
| | - Shupeng Zhang
- School of Chemical Engineering, Nanjing University of Science and Technology , Nanjing 210094, People's Republic of China
- Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering , Yancheng 210009, People's Republic of China
| | - Chuang Ma
- School of Chemical Engineering, Nanjing University of Science and Technology , Nanjing 210094, People's Republic of China
| | - Haiou Song
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210023, People's Republic of China
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