1
|
Xu W, Lin K, Ye D, Jiang X, Liu J, Chen Y. Performance of Toluene Removal in a Nonthermal Plasma Catalysis System over Flake-Like HZSM-5 Zeolite with Tunable Pore Size and Evaluation of Its Byproducts. Nanomaterials (Basel) 2019; 9:E290. [PMID: 30791415 DOI: 10.3390/nano9020290] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 02/10/2019] [Accepted: 02/13/2019] [Indexed: 11/18/2022]
Abstract
In this study, a series of HZSM-5 catalysts were prepared by the chemical liquid-phase deposition method, and low concentration toluene degradation was carried out in an atmospheric pressure dielectric barrier discharge (DBD) reactor. The catalysts were characterized by X-ray powder diffraction (XRD), SEM, TEM, and N2 adsorption analysis techniques. In addition, several organic contaminants were used to evaluate the adsorption performance of the prepared catalysts, and the effect of pore size on the removal efficiency of toluene and byproduct formation was also investigated. The unmodified HZSM-5 zeolite (Z0) exhibited good performance in toluene removal and CO2 selectivity due to the diffusion resistance of ozone and the amounts of active species (OH• and O•). Meanwhile, the time of flight mass spectrometry (TOF-MS) result showed that there were more byproducts of the benzene ring in the gas phase under the action of small micropore size catalysts. Moreover, the surface byproducts were detected by gas chromatography–mass spectrometry (GC-MS).
Collapse
|
2
|
Macpherson H, Cornes S, Zhou S, Porfyrakis K. A porphyrin-centred fullerene tetramer containing an N@C 60 substituent. R Soc Open Sci 2018; 5:180338. [PMID: 30109089 PMCID: PMC6083688 DOI: 10.1098/rsos.180338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 06/21/2018] [Indexed: 06/08/2023]
Abstract
An N@C60-containing C60 tetramer was synthesized by quadruple 1,3-dipolar cycloaddition (Prato) reaction. This molecule demonstrates the N@C60 qubit's ability to form covalently linked arrays. Furthermore, it provides a promising scaffold with which to measure multiple qubit-qubit interactions; which must be well characterized for a functioning quantum information processing architecture.
Collapse
|
3
|
Abstract
The first water-soluble derivative of the paramagnetic endohedral fullerene N@C60 has been prepared through the covalent attachment of a single addend containing two permethylated β-cyclodextrin units to the surface of the carbon cage. The line width of the derivative's EPR signal is highly sensitive to both the nature of the solvent and the presence of Cu(ii) ions in solution.
Collapse
Affiliation(s)
- Stuart P Cornes
- Department of Materials, University of Oxford, 16 Parks Road, Oxford, OX1 3PH, UK.
| | | | | |
Collapse
|
4
|
Sun Y, Pitliya P, Liu C, Gong X, Raghavan D, Karim A. Block copolymer compatibilized polymer: fullerene blend morphology and properties. POLYMER 2017; 113:135-46. [DOI: 10.1016/j.polymer.2017.02.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
5
|
|
6
|
Zhou S, Yamamoto M, Briggs GAD, Imahori H, Porfyrakis K. Probing the Dipolar Coupling in a Heterospin Endohedral Fullerene-Phthalocyanine Dyad. J Am Chem Soc 2016; 138:1313-9. [PMID: 26745202 DOI: 10.1021/jacs.5b11641] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Paramagnetic endohedral fullerenes and phthalocyanine (Pc) complexes are promising building blocks for molecular quantum information processing, for which tunable dipolar coupling is required. We have linked these two spin qubit candidates together and characterized the resulting electron paramagnetic resonance properties, including the spin dipolar coupling between the fullerene spin and the copper spin. Having interpreted the distance-dependent coupling strength quantitatively and further discussed the antiferromagnetic aggregation effect of the CuPc moieties, we demonstrate two ways of tuning the dipolar coupling in such dyad systems: changing the spacer group and adjusting the solution concentration.
Collapse
Affiliation(s)
- Shen Zhou
- Department of Materials, University of Oxford , Oxford OX1 3PH, U.K
| | - Masanori Yamamoto
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University , Nishikyo-ku, Kyoto 615-8510, Japan
| | | | - Hiroshi Imahori
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University , Nishikyo-ku, Kyoto 615-8510, Japan.,Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University , Nishikyo-ku, Kyoto 615-8510, Japan
| | | |
Collapse
|
7
|
Zhou S, Rašović I, Briggs GAD, Porfyrakis K. Synthesis of the first completely spin-compatible N@C60 cyclopropane derivatives by carefully tuning the DBU base catalyst. Chem Commun (Camb) 2015; 51:7096-9. [PMID: 25811940 DOI: 10.1039/c5cc01459j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two cyclopropane derivatives of N@C60 were synthesised by well-controlled Bingel reactions, in which 94% of the spin centres were retained, as confirmed by a series of quantitative electron spin paramagnetic resonance (EPR) measurements. Further study on the influence of the DBU catalyst base revealed a spin loss mechanism through a fullerene-DBU diradical.
Collapse
Affiliation(s)
- Shen Zhou
- Department of Materials, Oxford University, Oxford OX1 3PH, UK.
| | | | | | | |
Collapse
|
8
|
Liu G, Gimenez-Lopez MDC, Jevric M, Khlobystov AN, Briggs GAD, Porfyrakis K. Alignment of N@C60 derivatives in a liquid crystal matrix. J Phys Chem B 2013; 117:5925-31. [PMID: 23586675 DOI: 10.1021/jp401582j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The orientation of different N-substituted [N@C60]fulleropyrrolidine derivatives hosted in a nematic liquid crystal matrix has been studied by electron spin resonance spectroscopy. In this study, variations on the zero field splitting parameter of the guest species are employed as a means of determining their degree of orientation. Fulleropyrrolidines with more rigid N-substituents are preferentially oriented in the liquid crystal matrix, whereas those with less rigid substituents are almost randomly distributed. Additionally, the orientation of a C60 fullerene cage bearing a nitroxide radical has also been investigated in comparison.
Collapse
Affiliation(s)
- Guoquan Liu
- Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom
| | | | | | | | | | | |
Collapse
|
9
|
Pitliya P, Singh G, Chapa J, Karim A, Raghavan D. Dispersion–orientation effects of fulleropyrrolidine in zone annealed block-copolymer films toward optimizing OPV interfaces. POLYMER 2013. [DOI: 10.1016/j.polymer.2012.12.068] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
10
|
Plant SR, Jevric M, Morton JJL, Ardavan A, Khlobystov AN, Briggs GAD, Porfyrakis K. A two-step approach to the synthesis of N@C60 fullerene dimers for molecular qubits. Chem Sci 2013. [DOI: 10.1039/c3sc50395j] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
11
|
Farrington BJ, Jevric M, Rance GA, Ardavan A, Khlobystov AN, Briggs GAD, Porfyrakis K. Chemistry at the Nanoscale: Synthesis of an N@C60-N@C60 Endohedral Fullerene Dimer. Angew Chem Int Ed Engl 2012; 51:3587-90. [PMID: 22383390 DOI: 10.1002/anie.201107490] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Indexed: 11/09/2022]
Affiliation(s)
- B J Farrington
- Department of Materials, University of Oxford, Oxford OX1 3PH, UK
| | | | | | | | | | | | | |
Collapse
|
12
|
Farrington BJ, Jevric M, Rance GA, Ardavan A, Khlobystov AN, Briggs GAD, Porfyrakis K. Chemistry at the Nanoscale: Synthesis of an N@C60-N@C60 Endohedral Fullerene Dimer. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201107490] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
13
|
Liu G, Khlobystov AN, Charalambidis G, Coutsolelos AG, Briggs GAD, Porfyrakis K. N@C60–Porphyrin: A Dyad of Two Radical Centers. J Am Chem Soc 2012; 134:1938-41. [PMID: 22239715 DOI: 10.1021/ja209763u] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guoquan Liu
- Department of Materials, Oxford University, Oxford OX1 3PH, United Kingdom
| | - Andrei N. Khlobystov
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United
Kingdom
| | | | | | | | | |
Collapse
|
14
|
Gimenez-Lopez MDC, Räisänen MT, Chamberlain TW, Weber U, Lebedeva M, Rance GA, Briggs GAD, Pettifor D, Burlakov V, Buck M, Khlobystov AN. Functionalized fullerenes in self-assembled monolayers. Langmuir 2011; 27:10977-10985. [PMID: 21744819 DOI: 10.1021/la200654n] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Anisotropy of intermolecular and molecule-substrate interactions holds the key to controlling the arrangement of fullerenes into 2D self-assembled monolayers (SAMs). The chemical reactivity of fullerenes allows functionalization of the carbon cages with sulfur-containing groups, thiols and thioethers, which facilitates the reliable adsorption of these molecules on gold substrates. A series of structurally related molecules, eight of which are new fullerene compounds, allows systematic investigation of the structural and functional parameters defining the geometry of fullerene SAMs. Scanning tunnelling microscopy (STM) measurements reveal that the chemical nature of the anchoring group appears to be crucial for the long-range order in fullerenes: the assembly of thiol-functionalized fullerenes is governed by strong molecule-surface interactions, which prohibit formation of ordered molecular arrays, while thioether-functionalized fullerenes, which have a weaker interaction with the surface than the thiols, form a variety of ordered 2D molecular arrays owing to noncovalent intermolecular interactions. A linear row of fullerene molecules is a recurring structural feature of the ordered SAMs, but the relative alignment and the spacing between the fullerene rows is strongly dependent on the size and shape of the spacer group linking the fullerene cage and the anchoring group. Careful control of the chemical functionality on the carbon cages enables positioning of fullerenes into at least four different packing arrangements, none of which have been observed before. Our new strategy for the controlled arrangement of fullerenes on surfaces at the molecular level will advance the development of practical applications for these nanomaterials.
Collapse
|
15
|
|
16
|
Hörmann F, Hirsch A, Porfyrakis K, Briggs GAD. Synthesis and Magnetic Properties of a Nitrogen-Containing Fullerene Dimer. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000867] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
17
|
Kobayashi H, Ueda T, Miyakubo K, Eguchi T, Tani A. ESR study of molecular dynamics and orientation of TEMPO included in organic 1-D nanochannel. Phys Chem Chem Phys 2008; 10:1263-9. [DOI: 10.1039/b710098a] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|