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Zhou Z, Springer MA, Geng W, Zhu X, Li T, Li M, Jing Y, Heine T. Rational Design of Two-Dimensional Binary Polymers from Heterotriangulenes for Photocatalytic Water Splitting. J Phys Chem Lett 2021; 12:8134-8140. [PMID: 34410139 DOI: 10.1021/acs.jpclett.1c02109] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
On the basis of first-principles calculations, we report the design of three two-dimensional (2D) binary honeycomb-kagome polymers composed of B- and N-centered heterotriangulenes with a periodically alternate arrangement as in hexagonal boron nitride. The 2D binary polymers with donor-acceptor characteristics are semiconductors with a direct band gap of 1.98-2.28 eV. The enhanced in-plane electron conjugation contributes to high charge carrier mobilities for both electrons and holes, about 6.70 and 0.24 × 103 cm2 V-1 s-1, respectively, for the 2D binary polymer with carbonyl bridges (2D CTPAB). With appropriate band edge alignment to match the water redox potentials and pronounced light adsorption for the ultraviolet and visible range of spectra, 2D CTPAB is predicted to be an effective photocatalyst/photoelectrocatalyst to promote overall water splitting.
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Affiliation(s)
- Zhenpei Zhou
- Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Maximilian A Springer
- Fakultät Chemie und Lebensmittelchemie, TU Dresden, Bergstraße 66c, 01062 Dresden, Germany
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Permoserstraße 15, 04318 Leipzig, Germany
| | - Weixiang Geng
- Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Xinyue Zhu
- Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Tianchun Li
- Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Manman Li
- Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Yu Jing
- Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Thomas Heine
- Fakultät Chemie und Lebensmittelchemie, TU Dresden, Bergstraße 66c, 01062 Dresden, Germany
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Permoserstraße 15, 04318 Leipzig, Germany
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Mini P, Springer MA, Grace MR, Dennison GH, Tuck KL. A highly efficient red-emitting luminescent paper-based chemosensor for hydrogen sulfide. Chem Commun (Camb) 2020; 56:5605-5608. [PMID: 32342971 DOI: 10.1039/d0cc00745e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The first discrete bimetallic europium(iii)/copper(ii) complex for the fast, sensitive and selective luminescent detection of both aqueous and gaseous hydrogen sulfide has been developed. The chemosensor displayed an impressive response time of 30 seconds and a low theoretical limit of detection (100 ppb) for gaseous hydrogen sulfide.
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Affiliation(s)
- Parvathy Mini
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia.
| | | | - Michael R Grace
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia.
| | - Genevieve H Dennison
- Land Division, Defence Science and Technology Group, Fishermans Bend, Melbourne, Australia.
| | - Kellie L Tuck
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia.
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Ghosh S, Nakada A, Springer MA, Kawaguchi T, Suzuki K, Kaji H, Baburin I, Kuc A, Heine T, Suzuki H, Abe R, Seki S. Identification of Prime Factors to Maximize the Photocatalytic Hydrogen Evolution of Covalent Organic Frameworks. J Am Chem Soc 2020; 142:9752-9762. [DOI: 10.1021/jacs.0c02633] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Samrat Ghosh
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Akinobu Nakada
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Maximilian A. Springer
- Theoretical Chemistry, Technische Universität Dresden, Bergstrasse 66c, Dresden 01062, Germany
- Helmholtz-Zentrum Dresden-Rossendorf, Institut für Ressourcenökologie, Forschungsstelle Leipzig, Permoserstrasse 15, Leipzig 04318, Germany
| | - Takahiro Kawaguchi
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Katsuaki Suzuki
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Hironori Kaji
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Igor Baburin
- Theoretical Chemistry, Technische Universität Dresden, Bergstrasse 66c, Dresden 01062, Germany
| | - Agnieszka Kuc
- Helmholtz-Zentrum Dresden-Rossendorf, Institut für Ressourcenökologie, Forschungsstelle Leipzig, Permoserstrasse 15, Leipzig 04318, Germany
| | - Thomas Heine
- Theoretical Chemistry, Technische Universität Dresden, Bergstrasse 66c, Dresden 01062, Germany
- Helmholtz-Zentrum Dresden-Rossendorf, Institut für Ressourcenökologie, Forschungsstelle Leipzig, Permoserstrasse 15, Leipzig 04318, Germany
| | - Hajime Suzuki
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Ryu Abe
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shu Seki
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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Abstract
There are more than 200 two-dimensional (2D) networks with different topologies. The structural topology of a 2D network defines its electronic structure. Including the electronic topological properties, it gives rise to Dirac cones, topological flat bands and topological insulators. In this Tutorial Review, we show how electronic properties of 2D networks can be calculated by means of a tight-binding approach, and how these properties change when 2nd-neighbour interactions and spin-orbit coupling are included. We explain how to determine whether or not the resulting electronic features have topological signatures by calculation of Chern numbers, Z2 invariants, and by the nanoribbon approach. This tutorial gives suggestions how such topological properties could be realized in explicit atomistic chemical 2D systems made of molecular frameworks, in particular in 2D polymers, where the edges and vertices of a given 2D net are substituted by properly selected molecular building blocks and stitched together in such a way that long-range π-conjugation is retained.
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Affiliation(s)
- Maximilian A Springer
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Permoserstrasse 15, 04318 Leipzig, Germany. and Faculty for Chemistry and Food Chemistry, TU Dresden, Bergstrasse 66c, 01069 Dresden, Germany
| | - Tsai-Jung Liu
- Faculty for Chemistry and Food Chemistry, TU Dresden, Bergstrasse 66c, 01069 Dresden, Germany
| | - Agnieszka Kuc
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Permoserstrasse 15, 04318 Leipzig, Germany.
| | - Thomas Heine
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Permoserstrasse 15, 04318 Leipzig, Germany. and Faculty for Chemistry and Food Chemistry, TU Dresden, Bergstrasse 66c, 01069 Dresden, Germany and Department of Chemistry, Yonsei University, Seodaemun-gu, Seoul 120-749, Republic of Korea
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Wilson JT, Kearns G, Springer MA. Role of the research-subject locator (RSL) in the performance of a pediatric drug trial. J Clin Pharmacol 2003; 43:1196-202. [PMID: 14551173 DOI: 10.1177/0091270003258191] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This article examines the feasibility, effectiveness, and ethical constraints relevant to appropriate financial compensation of the pediatric house officer who functions as a research-subject locator (RSL). When carefully trained and supervised, the RSL can facilitate timely enrollment of research subjects in pediatric drug trials, augment the house officer training experience, and advocate for children to increase therapeutic options available for pediatric care. When monitored within the clinical trial schema, the RSL has no direct link to the study outcome and thus performs within ethical standards for subject enrollment and study participation.
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Affiliation(s)
- J T Wilson
- Department of Pediatrics, LSU Health Sciences Center, Shreveport, LA, USA
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Springer MA, van Binsbergen EA, Patka P, Bakker FC, Haarman HJ. [Resorbable rods and screws for fixation of ankle fractures. A randomized clinical prospective study]. Unfallchirurg 1998; 101:377-81. [PMID: 9629050 DOI: 10.1007/s001130050283] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A prospective randomized clinical trial was performed to evaluate the use of self-reinforced absorbable composites (Biofix) in the fixation of ankle fractures. The aim of this study was to demonstrate that fixation with Biofix rods and screws is as good as the standard A.O. fixation. The benefits of Biofix rods and screws are: a reduction in costs since no secondary operation is needed, prevention of stress-shielding and thereby diminishing the risk of bone porosity. Patients aged between 16 and 75 years old with closed, non-comminuted fractures of the lateral and/or medial malleolus and dislocation of the fracture fragments greater than 2 mm were included in the study. 22 patients were treated with Biofix rods and screws and the control group of 19 patients with a standard technique. After 3, 6 and 12 months, rontgenograms were taken. At the same time functional results were evaluated following the criteria of Olerud and Molander. Two patients were withdrawn from the trial for non-medical reasons. 22 patients (12 from the Biofix group, 10 from the AO group) operated two or more years ago were contacted to see if any complications had occurred since they were last seen. In 4 cases a Biofix screw broke down just beneath the head during insertion. This did not result in an insufficient fixation of the fracture. There were no early post-operative complications. The functional and rontgenological results in both groups were equal. In three cases a sterile sinus developed at the site of screw insertion. Biofix rods and screws, made of polylactic acid, are a good alternative for the fixation of fractures of the ankle. The use of resorbable fracture fixation material has the advantage that a second operation to remove osteosynthesis material is not necessary. The long term results are good. There is, however, a possibility of development of tissue reaction to the resorbable material.
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Affiliation(s)
- M A Springer
- Abteilung für Chirurgie/Traumatologie, Universitätsklinik, Vrije Universiteit, Amsterdam
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Springer MA, Bock HG, Philen RM, Hill RH, Crawford LV. Eosinophilia-myalgia syndrome in a child with phenylketonuria. Pediatrics 1992; 90:630-3. [PMID: 1408523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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Litov RE, Sickles VS, Chan GM, Springer MA, Cordano A. Plasma aluminum measurements in term infants fed human milk or a soy-based infant formula. Pediatrics 1989; 84:1105-7. [PMID: 2587141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- R E Litov
- Bristol-Myers United States Pharmaceutical and Nutritional Group, Evansville, IN 47721-0001
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