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Zubeltzu J, Matxain JM, Rezabal E. Computational approach to (ZnS)_{i} nanoclusters in ionic liquids. Phys Rev E 2021; 104:024604. [PMID: 34525555 DOI: 10.1103/physreve.104.024604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 07/20/2021] [Indexed: 11/07/2022]
Abstract
Unique and attractive properties have been predicted for II-VI-type semiconductor nanoclusters within the field of nanotechnology. However, the low reaction kinetics within the usual solvents gives only thermodynamic control during their production process, making the obtention of different metastable polymorphs extremely difficult. The use of ionic liquids as solvents has been proposed to overcome this problem. Identifying how these nanoclusters are solvated within ionic liquids is fundamental if this strategy is to be pursued. While computational chemistry tools are best suited for this task, the complexity and size of the system requires a careful design of the simulation protocol, which is put forward in this work. Taking as reference the (ZnS)_{12} nanocluster and the [EMIM][EtSO_{4}] ionic liquid, we characterize the interactions between the nanoparticle and first solvation shell by density functional theory calculations, considering most of the solvent implicitly. The DFT results are consistent through different theory levels showing a strong interaction between the Zn atoms of the nanocluster and the [EtSO_{4}^{-}] anion of the ionic liquid. A more realistic representation of the system is obtained by classical MD calculations, for which various classical force fields were considered and several atomic interactions parameterized. This new set of parameters correctly describes the interaction of different (ZnS) nanoclusters, supporting its transferability. The resulting MD simulation shows the formation of a structured ionic liquid solvation shell around the nanocluster with no exchange of ions for at least 5 ns, in agreement with the strong interactions observed in the density functional theory calculations.
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Affiliation(s)
- Jon Zubeltzu
- Donostia International Physics Center (DIPC), 20018 Donostia, Euskadi, Spain; Department of Applied Physics, Gipuzkoako Ingenieritza Eskola, Euskal Herriko Unibertsitatea (UPV/EHU), 20018 Donostia, Euskadi, Spain; and Polymers and Advanced Materials: Physics, Chemistry and Technology Department, Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), 20018 Donostia, Euskadi, Spain
| | - Jon M Matxain
- Donostia International Physics Center (DIPC), 20018 Donostia, Euskadi, Spain and Polymers and Advanced Materials: Physics, Chemistry and Technology Department, Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), 20018 Donostia, Euskadi, Spain
| | - Elixabete Rezabal
- Donostia International Physics Center (DIPC), 20018 Donostia, Euskadi, Spain and Polymers and Advanced Materials: Physics, Chemistry and Technology Department, Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), 20018 Donostia, Euskadi, Spain
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Li S, Shi L, Zhang L, Huang H, Xiao Y, Mao L, Tan R, Fu Z, Yu N, Yin D. Ionic liquid-mediated catalytic oxidation of β-caryophyllene by ultrathin 2D metal-organic framework nanosheets under 1 atm O2. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111196] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Synthesis and characterization of NaP zeolite nanocrystals using [C12mim][Cl] ionic liquid. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01064-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Patil V, Mahajan S, Kulkarni M, Patil K, Rode C, Coronas A, Yi GR. Synthesis of silver nanoparticles colloids in imidazolium halide ionic liquids and their antibacterial activities for gram-positive and gram-negative bacteria. CHEMOSPHERE 2020; 243:125302. [PMID: 31726264 DOI: 10.1016/j.chemosphere.2019.125302] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Revised: 10/15/2019] [Accepted: 11/02/2019] [Indexed: 06/10/2023]
Abstract
Four 1-butyl-3-methylimidazolium halide ionic liquids were synthesized via metathesis and anion exchange reactions. Silver nanoparticles (AgNPs) colloids were synthesized in four ionic liquids in the pressurized reactor by reduction of silver nitrate with hydrogen gas, without adding solvents or stabilizing agents. Antibacterial activities of base ionic liquids and AgNPs colloids in ionic liquids were reviewed by well-diffusion method for gram-positive Bacillus cereus (NCIM-2155) and gram-negative Escherichia coli (NCIM-2931) bacteria. Antibacterial activities of ionic liquids and AgNPs colloids in ionic liquids were observed to be controlled by ionic liquids anions and AgNPs particle size. The 1-butyl-3-methylimidazolium iodide ionic liquid exhibited higher antibacterial activities among the studied ionic liquids. Further, the presence of AgNPs in 1-butyl-3-methylimidazolium iodide, ionic liquid enhanced its antibacterial activity for Bacillus cereus and Escherichia coli bacteria.
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Affiliation(s)
- Virendra Patil
- School of Chemical Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
| | - Swapnil Mahajan
- Department of Chemistry, Savitribai Phule Pune University, Ganeshkhind Road, Pune, 411007, India
| | - Mohan Kulkarni
- Department of Chemistry, Savitribai Phule Pune University, Ganeshkhind Road, Pune, 411007, India
| | - Kashinath Patil
- Centre for Materials Characterization Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pashan, Pune, 411008, India
| | - Chandrashekhar Rode
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
| | - Alberto Coronas
- Rovira I Virgili University, Mechanical Engineering Dept., Av. Països Catalans, 26, 43007, Tarragona, Spain
| | - Gi-Ra Yi
- School of Chemical Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea
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Irfan M, Ahmad T, Moniruzzaman M, Bhattacharjee S, Abdullah B. Size and stability modulation of ionic liquid functionalized gold nanoparticles synthesized using Elaeis guineensis (oil palm) kernel extract. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2017.02.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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Sun C, Zhao W, Zhang H, Feng G. Molecular insight into structures of monocationic and dicationic ionic liquids in mica slits. Mol Phys 2019. [DOI: 10.1080/00268976.2019.1678773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Chen Sun
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Wei Zhao
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Huanhuan Zhang
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Guang Feng
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
- Nano Interface Centre for Energy, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, People’s Republic of China
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Synthesis and characterization of silver nanoparticles in aqueous solutions of surface active imidazolium-based ionic liquids and traditional surfactants SDS and DTAB. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.10.046] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Iranpour P, Ajamian M, Safavi A, Iranpoor N, Abbaspour A, Javanmardi S. Synthesis of highly stable and biocompatible gold nanoparticles for use as a new X-ray contrast agent. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2018; 29:48. [PMID: 29671071 DOI: 10.1007/s10856-018-6053-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Accepted: 03/28/2018] [Indexed: 06/08/2023]
Abstract
This work reports a novel reduction procedure for the synthesis of Gum Arabic (GA) capped-gold nanoparticles (AuNPs) in glucosammonium formate as a new ionic liquid. The GA coated AuNPs show good stability in physiological media. The synthesized AuNPs were characterized by UV-Vis spectroscopy, transmission electron microscopy, dynamic light scattering and X-ray diffraction analysis. These stable AuNPs are introduced as a new contrast agent for X-ray Computed Tomography (X-ray CT). These nanoparticles have higher contrasting properties than the commercial contrast agent, Visipaque. The precursors used (Gum Arabic and glucose based-ionic liquid) for synthesis of AuNPs are biocompatible and non-toxic.
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Affiliation(s)
- Pooya Iranpour
- Medical Imaging Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Maral Ajamian
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 7194684795, Iran
| | - Afsaneh Safavi
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 7194684795, Iran.
| | - Nasser Iranpoor
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 7194684795, Iran
| | - Abdolkarim Abbaspour
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 7194684795, Iran
| | - Sanaz Javanmardi
- Department of Biology, Faculty of Science, University of Guilan, Rasht, Iran
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Influence of the anion nature and alkyl substituents in the behavior of ionic liquids derived from phenylpyridines. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.10.062] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Okazoe S, Yasaka Y, Ueno M, Kimura Y. Formate Ionic Liquids Playing the Roles of Reducer and Stabilizer for the Synthesis of Noble Metal Nanoparticles. CHEM LETT 2017. [DOI: 10.1246/cl.170501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Shinya Okazoe
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
| | - Yoshiro Yasaka
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
| | - Masakatsu Ueno
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
| | - Yoshifumi Kimura
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321
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Albizia amara Roxb. Mediated Gold Nanoparticles and Evaluation of Their Antioxidant, Antibacterial and Cytotoxic Properties. J CLUST SCI 2016. [DOI: 10.1007/s10876-016-1085-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Dorosti N, Jamshidi F. Plant-mediated gold nanoparticles by Dracocephalum kotschyi as anticholinesterase agent: Synthesis, characterization, and evaluation of anticancer and antibacterial activity. J Appl Biomed 2016. [DOI: 10.1016/j.jab.2016.03.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Wu L, Zhou J, Xu H. Room temperature ionic liquid assisted synthesis of ultra-stable Au nanoparticles via a modified Brust–Schiffrin method. RSC Adv 2016. [DOI: 10.1039/c6ra17663a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Absalan G, Akhond M, Ershadifar H, Rezaei MA. Two-approach study for preparing stable colloidal gold nanoparticles in organic solvents by using 1-dodecyl-3-methylimidazolium bromide as an efficient capping and phase transfer agent. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.09.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Akhond M, Absalan G, Ershadifar H. Highly sensitive colorimetric determination of amoxicillin in pharmaceutical formulations based on induced aggregation of gold nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 143:223-229. [PMID: 25733249 DOI: 10.1016/j.saa.2015.01.071] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 01/19/2015] [Accepted: 01/28/2015] [Indexed: 06/04/2023]
Abstract
A novel, simple and highly sensitive colorimetric method is developed for determination of Amoxicillin (AMX). The system is based on aggregation of citrate-capped gold nanoparticles (AuNP) in acetate buffer (pH=4.5) in the presence of the degradation product of Amoxicillin (DPAMX). It was found that the color of gold nanoparticles changed from red to purple and the intensity of surface plasmon resonance (SPR) peak of AuNPs decreased. A new absorption band was appeared in the wavelength range of 600-700nm upon addition of DPAMX. The absorbance ratio at the wavelength of 660 and 525nm (A660/A525) was chosen as the analytical signal indirectly related to AMX concentration. The linearity of the calibration graph was found over the concentration range of 0.3-4.5μM AMX with a correlation coefficient of 0.9967. Under the optimum experimental conditions, the detection limit was found to be 0.15μM. The applicability of the method was successfully demonstrated by analysis of AMX in pharmaceutical formulations including capsules and oral suspensions.
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Affiliation(s)
- Morteza Akhond
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Ghodratollah Absalan
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran.
| | - Hamid Ershadifar
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
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Chabba S, Kumar S, Aswal VK, Kang TS, Mahajan RK. Interfacial and aggregation behavior of aqueous mixtures of imidazolium based surface active ionic liquids and anionic surfactant sodium dodecylbenzenesulfonate. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.02.032] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Dhas TS, Kumar VG, Karthick V, Govindaraju K, Shankara Narayana T. Biosynthesis of gold nanoparticles using Sargassum swartzii and its cytotoxicity effect on HeLa cells. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 133:102-6. [PMID: 24934968 DOI: 10.1016/j.saa.2014.05.042] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/03/2014] [Accepted: 05/09/2014] [Indexed: 05/12/2023]
Abstract
In this investigation, biological synthesis of gold nanoparticles (AuNPs) using Sargassum swartzii and its cytotoxicity against human cervical carcinoma (HeLa) cells is reported. The biological synthesis involved the reduction of chloroauric acid led to the formation of AuNPs within 5min at 60°C and the formation of AuNPs was confirmed using UV-vis spectrophotometer. The AuNPs were stable; spherical in shape with well-defined dimensions, and the average size of the particle is 35nm. A zeta potential value of -27.6mV revealed synthesized AuNPs were highly stable. The synthesized AuNPs exhibited a dose-dependent cytotoxicity against human cervical carcinoma (HeLa) cells. Furthermore, induction of apoptosis was measured by DAPI (4',6-Diamidino-2-phenylindole dihydrochloride) staining.
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Affiliation(s)
- T Stalin Dhas
- Nanoscience Division, Centre for Ocean Research, Sathyabama University, Chennai 600 119, India
| | - V Ganesh Kumar
- Nanoscience Division, Centre for Ocean Research, Sathyabama University, Chennai 600 119, India.
| | - V Karthick
- Nanoscience Division, Centre for Ocean Research, Sathyabama University, Chennai 600 119, India
| | - K Govindaraju
- Nanoscience Division, Centre for Ocean Research, Sathyabama University, Chennai 600 119, India
| | - T Shankara Narayana
- Agricultural Research Station, Acharya N.G. Ranga Agricultural University, Kadiri 515 591, Andhra Pradesh, India
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Dai J, He R, Yuan Y, Wang W, Fanga D. TiO2 nanoparticles: low-temperature hydrothermal synthesis in ionic liquids/water and the photocatalytic degradation for o-nitrophenol. ENVIRONMENTAL TECHNOLOGY 2014; 35:203-208. [PMID: 24600858 DOI: 10.1080/09593330.2013.822522] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The well-crystallized anatase TiO2-IL nanoparticles were synthesized by one-step routes under low-temperature using room temperature ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate as an additional solvent with water. The photocatalytic properties of TiO2 nanoparticles were evaluated by photocatalytic degradation experiments of o-nitrophenol. The TiO2 nanoparticles show a higher photocatalytic activity than the TiO2 with pure water and commercial TiO2 (P25), which may be related to the high crystallinity. The TiO2-IL nanoparticles still hold a high photocatalytic activity after the catalyst was recycled nine times. Chemical oxygen demand removal was achieved under optimum experimental conditions.
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Affiliation(s)
- Jingtao Dai
- Jiangsu Provincial Key Laboratory of Coastal wetland Bioresources and Environmental Protection, Yancheng Teachers University, Yancheng 224002, People's Republic of China
| | - Ruiyu He
- College of Chemistry and Chemical Engineering, Yancheng Teachers University, Yancheng 224002, People's Republic of China
| | - Yuan Yuan
- College of Chemistry and Chemical Engineering, Yancheng Teachers University, Yancheng 224002, People's Republic of China
| | - Wei Wang
- College of Chemistry and Chemical Engineering, Yancheng Teachers University, Yancheng 224002, People's Republic of China
| | - Dong Fanga
- Jiangsu Provincial Key Laboratory of Coastal wetland Bioresources and Environmental Protection, Yancheng Teachers University, Yancheng 224002, People's Republic of China
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Hemmateenejad B, Dorostkar S, Shakerizadeh-Shirazi F, Shamsipur M. pH-independent optical sensing of heparin based on ionic liquid-capped gold nanoparticles. Analyst 2013; 138:4830-7. [PMID: 23826612 DOI: 10.1039/c3an36895e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A simple pH-independent optical method for the sensing of heparin, as a biomedically important polyionic drug, based on aggregation of gold nanoparticles (AuNPs) is described. The polyanionic heparin induces the aggregation of positively charged ionic liquid stabilized AuNPs, which results in a shift in the surface plasmon band and a consequent color change of the AuNPs from red to blue. The color change was monitored using UV-vis spectrophotometry and image analysis methods. The aggregation was confirmed by transmission electron microscopic measurements. The degree of aggregation was found to be proportional to the concentration of the added heparin, allowing its quantitative detection. The change in the absorbance and color-value has been used to monitor the concentration of heparin. This optical method can quantify heparin as low as 0.010 μg mL(-1) and the calibration is linear for a wide range of concentration.
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Dipyrromethane as a new organic reagent for the synthesis of gold nanoparticles: preparation and application. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2013. [DOI: 10.1007/s13738-013-0253-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Soni SS, Vekariya RL, Aswal VK. Ionic liquid induced sphere-to-ribbon transition in the block copolymer mediated synthesis of silver nanoparticles. RSC Adv 2013. [DOI: 10.1039/c3ra41138a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Lee YE, Lee SY, You SS. Synthesis of Dodecanethiol-Capped Nanoparticles Using Ionic Liquids. KOREAN CHEMICAL ENGINEERING RESEARCH 2012. [DOI: 10.9713/kcer.2012.50.5.795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Banerjee A, Theron R, Scott RWJ. Highly stable noble-metal nanoparticles in tetraalkylphosphonium ionic liquids for in situ catalysis. CHEMSUSCHEM 2012; 5:109-116. [PMID: 22174187 DOI: 10.1002/cssc.201100413] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Indexed: 05/31/2023]
Abstract
Gold and palladium nanoparticles were prepared by lithium borohydride reduction of the metal salt precursors in tetraalkylphosphonium halide ionic liquids in the absence of any organic solvents or external nanoparticle stabilizers. These colloidal suspensions remained stable and showed no nanoparticle agglomeration over many months. A combination of electrostatic interactions between the coordinatively unsaturated metal nanoparticle surface and the ionic-liquid anions, bolstered by steric protection offered by the bulky alkylated phosphonium cations, is likely to be the reason behind such stabilization. The halide anion strongly absorbs to the nanoparticle surface, leading to exceptional nanoparticle stability in halide ionic liquids; other tetraalkylphosphonium ionic liquids with non-coordinating anions, such as tosylate and hexafluorophosphate, show considerably lower affinities towards the stabilization of nanoparticles. Palladium nanoparticles stabilized in the tetraalkylphosphonium halide ionic liquid were stable, efficient, and recyclable catalysts for a variety of hydrogenation reactions at ambient pressures with sustained activity. Aerial oxidation of the metal nanoparticles occurred over time and was readily reversed by re-reduction of oxidized metal salts.
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Safavi A, Sedaghati F, Shahbaazi H, Farjami E. Facile approach to the synthesis of carbon nanodots and their peroxidase mimetic function in azo dyes degradation. RSC Adv 2012. [DOI: 10.1039/c2ra20355c] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Safavi A, Zeinali S, Yazdani M. Synthesis of biologically stable gold nanoparticles using imidazolium-based amino acid ionic liquids. Amino Acids 2011; 43:1323-30. [DOI: 10.1007/s00726-011-1205-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2011] [Accepted: 12/12/2011] [Indexed: 10/14/2022]
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Xia J, Yin S, Li H, Xu H, Xu L, Zhang Q. Enhanced photocatalytic activity of bismuth oxyiodine (BiOI) porous microspheres synthesized via reactable ionic liquid-assisted solvothermal method. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.07.023] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Electrochemical Preparation of Nickel and Iron Nanoparticles in a Hydrophobic Ionic Liquid. ACTA ACUST UNITED AC 2011. [DOI: 10.1149/2.010112esl] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Stamatoiu O, Mirzaei J, Feng X, Hegmann T. Nanoparticles in liquid crystals and liquid crystalline nanoparticles. Top Curr Chem (Cham) 2011; 318:331-93. [PMID: 21928012 DOI: 10.1007/128_2011_233] [Citation(s) in RCA: 138] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Combinations of liquid crystals and materials with unique features as well as properties at the nanoscale are reviewed. Particular attention is paid to recent developments, i.e., since 2007, in areas ranging from liquid crystal-nanoparticle dispersions to nanomaterials forming liquid crystalline phases after surface modification with mesogenic or promesogenic moieties. Experimental and synthetic approaches are summarized, design strategies compared, and potential as well as existing applications discussed. Finally, a critical outlook into the future of this fascinating field of liquid crystal research is provided.
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Affiliation(s)
- Oana Stamatoiu
- Department of Chemistry, University of Manitoba, Winnipeg, MB, Canada, R3T 2N2
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