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Arimura S, Matsumoto I, Sekiya R, Haino T. Intermediate Color Emission via Nanographenes with Organic Fluorophores. Angew Chem Int Ed Engl 2024; 63:e202315508. [PMID: 38191241 DOI: 10.1002/anie.202315508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 12/19/2023] [Accepted: 01/05/2024] [Indexed: 01/10/2024]
Abstract
Photoluminescence (PL) color can be tuned by mixing fluorophores emitting the three primary colors in an appropriate ratio. When color tuning is achieved on a single substrate, we can simplify device structures. We demonstrated that nanographenes (NGs), which are graphene fragments with a size of tens of nanometers, could be utilized as carriers of fluorophores. The addition of red- and blue-light-emitting fluorophores on the edge successfully reproduced the purple light. The relative PL intensities of the fluorophores could be regulated by the excitation wavelength, enabling multicolor emission between blue and red light. Owing to the triphenylamine units of the fluorophores, the NGs showed PL enhancement due to aggregation. This characteristic was valuable for the fabrication of solid polymer materials. Specifically, the functionalized NGs can be dispersed into polyvinylidene difluoride. The resultant polymer films emitted red, blue, and purple color. Our study demonstrated the potential applicability of NGs for fluorophore carriers capable of reproducing intermediate colors of light.
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Affiliation(s)
- Saki Arimura
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Ikuya Matsumoto
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Ryo Sekiya
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
- International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM2), Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
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2
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Sekiya R, Haino T. Application of Exciton Coupling for Characterization of Nanographene Edge. Chemphyschem 2024; 25:e202300740. [PMID: 38226791 DOI: 10.1002/cphc.202300740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 12/18/2023] [Accepted: 01/15/2024] [Indexed: 01/17/2024]
Abstract
The structural characterization of nonstoichiometric nanographene (NG)-organic hybrid materials is usually difficult. The number of substituents on the edge and their arrangements are frequently questioned but are difficult to answer. Since the number of functional groups is closely related to the distance between the nearest neighbors (dISD ), the extraction of dISD from spectroscopic data could provide important information on their structural characterization. We show that exciton coupling, which is a theoretical prediction of the absolute structures of discrete molecules, is a possible candidate to address this issue. The comparison of the calculated CD spectra of the chiral chromophores extracted from the model NG edge with the observed edge spectra indicated a dISD of ca. 8 Å; this corresponded to substitution on every other armchair edge. Furthermore, an up-up-down-down alternate orientation was found to be a possible edge structure. Although the procedure was limited to NGs carrying chiral substituents, our method could facilitate the detailed structural characterization of NG-organic hybrid materials.
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Affiliation(s)
- Ryo Sekiya
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
- International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM2), Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
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Yuan X, Yu Z, Hu J, Xiao B, Zhang T, Li K, Chen C, Tao Z, Xiao X. A cucurbit[6]uril-based carbon dot for recognizing metal ions and anions in solutions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 307:123632. [PMID: 37952426 DOI: 10.1016/j.saa.2023.123632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 11/01/2023] [Accepted: 11/07/2023] [Indexed: 11/14/2023]
Abstract
In this paper, fluorescent nitrogen doped carbon quantum dots (CQDs) were synthesized by a hydrothermal method using cucurbit[6]uril (Q[6]) and mandelic acid (MA). Compared with other carbon quantum dots, cucurbit[6]uril has the advantage that its original rigid macrocyclic skeleton was completely retained during the synthesis process. In addition, the performance of the Q[6]-CQDs were characterized by fluorescence and NMR spectroscopies, then the crystal structure of Q[6]-MA-[CdCl4]2- was determined by the single crystal X-ray crystallography. The Q[6]-CQDs showed good water solubility and stable optical property. Subsequently, using the obtained Q[6]-CQDs, a universal fluorescent probe for detecting and recognizing Fe3+, Ba2+, Al3+, I- and ClO- has been developed based on macrocyclic chemistry. Under ideal conditions, the detection limits were calculated to be 3.89 × 10-6 M, 2.58 × 10-5 M, 1.42 × 10-5 M, 6.84 × 10-6 M and 1.50 × 10-5 M.
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Affiliation(s)
- XingYue Yuan
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - ZhiChao Yu
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - JianHang Hu
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Bo Xiao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China; Engineering Research Center for Molecular Medicine, School of Basic Medical Science, Guizhou Medical University, Guiyang 550025, China
| | - TingTing Zhang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Kui Li
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Chang Chen
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Zhu Tao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Xin Xiao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China.
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Guo Y, Liu Y, Zhao X, Zhao J, Wang Y, Zhang X, Guo Z, Yan X. Synergistic Covalent-and-Supramolecular Polymers with an Interwoven Topology. ACS APPLIED MATERIALS & INTERFACES 2023; 15:25161-25172. [PMID: 35894294 DOI: 10.1021/acsami.2c10404] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Network topologies, especially some high-order topologies, are able to furnish cross-linked polymer materials with enhanced properties without altering their chemical composition. However, the fabrication of such topologically intriguing architectures at the macromolecular level and in-depth insights into their structure-property relationship remain a significant challenge. Herein, we relied on synergistic covalent-and-supramolecular polymers (CSPs) as a platform to prepare a range of polymer networks with an interwoven topology. Specifically, through the sequential supramolecular self-assemblies, the covalent polymers (CPs) and metallosupramolecular polymers (MSPs) could be interwoven in our CSPs by [2]pseudorotaxane cross-links. As a result, the obtained CSPs possessed a topological network that could not only promote the synergistic effect between CPs and MSPs to afford mechanically robust yet dynamic materials but also vest polymers with some functions, as manifested by force-induced hierarchical dissociations of supramolecular interactions and superior thermomechanical stability compared to our previously reported CSP systems. Furthermore, our CSPs exhibited tunable mechanical performance toward multiple stimuli including K+ and PPh3, demonstrating abundant stimuli-responsive properties. We hope that these findings could provide novel opportunities toward achieving topological structures at the macromolecular level and also motivate further explorations of polymeric materials via the way of controlling their topological structures.
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Affiliation(s)
- Yuchen Guo
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Yuhang Liu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Xinyang Zhao
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Jun Zhao
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Yongming Wang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Xinhai Zhang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Zhewen Guo
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Xuzhou Yan
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
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Chang YH, Chiang WH, Ilhami FB, Tsai CY, Huang SY, Cheng CC. Water-soluble graphene quantum dot-based polymer nanoparticles with internal donor/acceptor heterojunctions for efficient and selective detection of cancer cells. J Colloid Interface Sci 2023; 637:389-398. [PMID: 36716663 DOI: 10.1016/j.jcis.2023.01.104] [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: 12/11/2022] [Revised: 01/08/2023] [Accepted: 01/21/2023] [Indexed: 01/26/2023]
Abstract
We present a new, insightful donor-acceptor (D-A) energy transfer-based strategy for the preparation and development of water-soluble multifunctional pH-responsive heterojunction nanoparticles. Hydrophilic tertiary amine-grafted polythiophene (WPT) as a donor and blue fluorescent graphene quantum dots (GQD) as an acceptor spontaneously form co-assembled nanoparticles that function as a highly pH-sensitive and efficient biosensor appropriate for the detection of cancer cells. These WPT/GQD nanoparticles exhibit a number of unique physical characteristics-such as broad-range, tunable GQD-loading contents and particle sizes, extremely low cytotoxicity in normal and cancer cells, and highly sensitive pH-responsiveness and rapid acid-triggered fluorescent behavior under aqueous acidic conditions. We show these features are conferred by self-aggregation of the GQD within the nanoparticles and subsequent aggregation-induced fluorescence of GQD after disassembly of the nanoparticles and dissociation of the D-A interactions under acidic conditions. Importantly, in vitro fluorescence imaging experiments clearly demonstrated the WPT/GQD nanoparticles were gradually taken up into normal and cancer cells in vitro. Selective formation of GQD aggregates subsequently occurred in the acidic microenvironment of the cancer cells and the interior of the cancer cells exhibited strong blue fluorescence; these phenomena did not occur in normal cells. In contrast, pristine WPT and GQD did not exhibit cellular microenvironment-triggered fluorescence transitions in cancer or normal cell lines. Therefore, this newly discovered water-soluble heterojunction system may represent a strongly fluorescent highly pH-sensitive bioprobe for rapid detection of cancer cells.
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Affiliation(s)
- Yi-Hsuan Chang
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Wei-Hung Chiang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Fasih Bintang Ilhami
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; Department of Natural Science, Faculty of Mathematics and Natural Science, Universitas Negeri Surabaya, Surabaya 60231, Indonesia
| | - Cheng-Yu Tsai
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Sin-Yu Huang
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Chih-Chia Cheng
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; Advanced Membrane Materials Research Center, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
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6
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Moriguchi H, Sekiya R, Haino T. Substituent-Induced Supramolecular Aggregates of Edge Functionalized Nanographenes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2207475. [PMID: 36929334 DOI: 10.1002/smll.202207475] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/01/2023] [Indexed: 06/18/2023]
Abstract
Precisely controlled molecular assemblies often display intriguing morphologies and/or functions arising from their structures. The application of the concept of the self-assembly for controlling the aggregation of nanographenes (NGs) is challenging. The title NGs are those carrying both long alkyl chains and tris(phenylisoxazolyl)benzene (TPIB) on the edge. The former group secures the affinity of NGs for organic solvents, and the latter group drives the 1D arrangement of NGs through the interactions between the TPIB units. The concentration-dependent and temperature variable 1 H NMR, UV-vis, and PL spectra demonstrate the aggregation of NGs in 1,2-dichloroethane, and the aggregation is controllable by the regulation of the solvent polarity. AFM images give the stacked structures of the NGs, and these aggregates turn out to be network polymeric structures at a high concentration. These observations demonstrate that the synergy of the face-to-face interactions between the surfaces and the interactions between the TPIB units are effective for controlling the self-assembly of the NGs.
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Affiliation(s)
- Haruka Moriguchi
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Ryo Sekiya
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
- International Institute for Sustainability with Knotted Chiral Meta Matter (SKCM 2), Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
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7
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Takahashi S, Sekiya R, Haino T. Computational Studies on the Structures of Nanographenes with Various Edge Functionalities. Chemphyschem 2023; 24:e202200465. [PMID: 36377417 DOI: 10.1002/cphc.202200465] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 11/12/2022] [Indexed: 11/16/2022]
Abstract
Computational studies have often been carried out on hydrogen-terminated nanographenes (NGs). These structures are, however, far from those deduced from experimental observations, which have suggested armchair edges with two carboxy groups on the edges as dominant. We conducted computational studies on NGs consisting of C42 , C60 , C78 , C96 , C142 , and C174 carbon atoms with hydrogen, carboxy, and N-methyl imide-terminated armchair edges. DFT calculations inform distorted basal planes and similar HOMO-LUMO gaps, indicating that the edge oxidation and functionalization do not very influence the electronic structure. Comparison of observed UV-vis spectra of carboxy- and N-octadecyl chain terminated NGs with calculated spectra of model NGs informs the contribution of π-π* transitions on the basal plane to the absorptions in the visible region. A dimeric structure of NG and octadecyl-installed NG demonstrate that both the distorted basal planes and the steric contacts among the functional groups widen the surface-to-surface distance thereby allowing the invasion of solvent molecules between the surfaces. This picture is consistent with the improved solubility of edge-modified NGs.
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Affiliation(s)
- Shusaku Takahashi
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Ryo Sekiya
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan.,International Institute for Sustainability with Knotted Chiral Meta Matter (SKCM2), Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
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8
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Supramolecular Polymers: Recent Advances Based on the Types of Underlying Interactions. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Vázquez‐Nakagawa M, Rodríguez‐Pérez L, Martín N, Herranz MÁ. Supramolecular Assembly of Edge Functionalized Top-Down Chiral Graphene Quantum Dots. Angew Chem Int Ed Engl 2022; 61:e202211365. [PMID: 36044587 PMCID: PMC9828669 DOI: 10.1002/anie.202211365] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Indexed: 01/12/2023]
Abstract
The construction of supramolecular assemblies of heterogeneous materials at the nanoscale is an open challenge in science. Herein, new chiral graphene quantum dots (GQDs) prepared by amidation reaction introducing chiral amide groups and pyrene moieties into the periphery of GQDs are described. The analytical and spectroscopic data show an efficient chemical functionalization and the morphological study of the supramolecular ensembles using SEM and AFM microscopies reveals the presence of highly ordered fibers of several micrometers length. Fluorescence studies, using emission spectroscopy and confocal microscopy, reveal that the fibers stem from the π-π stacking of both pyrenes and GQDs, together with the hydrogen bonding interactions of the amide groups. Circular dichroism analysis supports the chiral nature of the supramolecular aggregates.
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Affiliation(s)
- Mikiko Vázquez‐Nakagawa
- Department of Organic ChemistryFaculty of ChemistryUniversidad Complutense de Madrid28040MadridSpain
| | - Laura Rodríguez‐Pérez
- Department of Organic ChemistryFaculty of ChemistryUniversidad Complutense de Madrid28040MadridSpain
| | - Nazario Martín
- Department of Organic ChemistryFaculty of ChemistryUniversidad Complutense de Madrid28040MadridSpain,IMDEA-Nanocienciac/Faraday 9, Campus Cantoblanco28049MadridSpain
| | - M. Ángeles Herranz
- Department of Organic ChemistryFaculty of ChemistryUniversidad Complutense de Madrid28040MadridSpain
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Vázquez-Nakagawa M, Rodríguez-Pérez L, Martin N, Herranz MÁ. Supramolecular Assembly of Edge Functionalized Top‐down Chiral Graphene Quantum Dots. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202211365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | - Nazario Martin
- University Complutense Faculty of Chemistry 28040 Madrid SPAIN
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11
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Sekiya R, Haino T. Integration of Nanographenes and Organic Chemistry - Toward Nanographene-based Two-Dimensional Materials. Chemphyschem 2022; 23:e202200311. [PMID: 35650010 DOI: 10.1002/cphc.202200311] [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: 05/07/2022] [Indexed: 11/06/2022]
Abstract
Graphene and its relatives have received considerable attention from the fields of physics and chemistry since the isolation of pristine graphene sheets. Nanographenes (NGs) are graphene fragments that are a few to tens of nanometers in diameter. Compared to graphene and its relatives, such as graphene oxides, NGs can be handled more easily, and their large π surface and oxygen functional groups on the edge allow postsynthetic modifications. The study of NGs is gradually shifting from the development of synthetic procedures to postsynthetic modification. From the structural point of view, NGs can be regarded as two-dimensional carbon polymers. Their unique structures and affinity for organic molecules make NGs excellent scaffolds for two-dimensional materials, which are now an important topic in organic and polymer chemistry. In this conceptual article, we introduce the position of NGs from the perspective of two-dimensional substances and briefly summarize both the structural features of NGs and the effects of functionalization on their physical properties. These are valuable when producing reasonable strategies for their postsynthetic modifications.
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Affiliation(s)
- Ryo Sekiya
- Hiroshima Daigaku - Higashihiroshima Campus: Hiroshima Daigaku, chemistry, JAPAN
| | - Takeharu Haino
- Hiroshima Daigaku - Higashihiroshima Campus: Hiroshima Daigaku, Department of Chemistry, 1-3-1 Kagamiyama, 739-8526, Higashi-Hiroshima, JAPAN
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12
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Matsumoto I, Sekiya R, Fukui H, Sun R, Haino T. Electrochromism of Nanographenes in the Near‐Infrared Region. Angew Chem Int Ed Engl 2022; 61:e202200291. [DOI: 10.1002/anie.202200291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Ikuya Matsumoto
- Department of Chemistry Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima, Hiroshima 739-8526 Japan
| | - Ryo Sekiya
- Department of Chemistry Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima, Hiroshima 739-8526 Japan
| | - Hiroji Fukui
- Advanced Technology Institute Corporate R&D Center Sekisui Chemical Co., Ltd. 2-1 Hyakuyama Shimamoto-cho, Mishima-gun, Osaka 618-0021 Japan
| | - Ren‐De Sun
- Advanced Technology Institute Corporate R&D Center Sekisui Chemical Co., Ltd. 2-1 Hyakuyama Shimamoto-cho, Mishima-gun, Osaka 618-0021 Japan
| | - Takeharu Haino
- Department of Chemistry Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima, Hiroshima 739-8526 Japan
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Miardan LN, Rezaii E, Mahkam M. 500 Methylene blue removal with carbon-cage adsorbent produced by hydrazinium azide and comparison of its performance with graphene quantum dot composite. MAIN GROUP CHEMISTRY 2022. [DOI: 10.3233/mgc-210165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Water pollution, which is an increasing global concern, is one of the significant environmental problems which damage economic growth and the health of billions of people. Therefore, many companies and investigators make an effort to prepare a reusable and cost-effective filter to overcome the problem of water shortages. In this study, we have investigated two adsorbents with high adsorption capacity: a graphene quantum dot-based composite and a carbon-cage adsorbent prepared only with graphite and hydrazinium azide that are expanded through an electrical heater. Both adsorbents were able to remove almost 100% of the methylene blue dye, which is widely used in the textile industry. Adsorption rates and morphology of adsorbents were analyzed with XRD, SEM, EDS, TGA and UV spectrometry measurements.
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Affiliation(s)
- Leila Nazmi Miardan
- Department of Chemistry, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Ebrahim Rezaii
- Department of Chemistry, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Mehrdad Mahkam
- Department of Chemistry, Faculty of Science, Azarbaijan Shahid Madani University, Tabriz, Iran
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Cai KB, Huang HY, Hsieh ML, Chen PW, Chiang SE, Chang SH, Shen JL, Liu WR, Yuan CT. Two-Dimensional Self-Assembly of Boric Acid-Functionalized Graphene Quantum Dots: Tunable and Superior Optical Properties for Efficient Eco-Friendly Luminescent Solar Concentrators. ACS NANO 2022; 16:3994-4003. [PMID: 35234037 DOI: 10.1021/acsnano.1c09582] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Carbon-based nanomaterials hold promise for eco-friendly alternatives to heavy-metal-containing quantum dots (QDs) in optoelectronic applications. Here, boric acid-functionalized graphene quantum dots (B-GQDs) were prepared using bottom-up molecular fusion based on nitrated pyrenes and boric acid. Such B-GQDs with crystalline graphitic structures and hydrogen-bonding functionalities would be suitable model systems for unraveling the photoluminescence (PL) mechanism, while serving as versatile building blocks for supramolecular self-assembly. Unlike conventional GQDs with multiple emissive states, the B-GQDs exhibited excitation-wavelength-independent, vibronic-coupled excitonic emission. Interestingly, their PL spectra can be tuned without largely sacrificing the quantum yield (QY) due to two-dimensional self-assembly. In addition, such B-GQDs in a polystyrene matrix possessed an ultrahigh QY (∼90%) and large exciton binding energy (∼300 meV). Benefiting from broadband absorption, ultrahigh QY, and long-wavelength emission, efficient laminated luminescent solar concentrators (100 × 100 × 6.3 mm3) were fabricated, yielding a high power conversion efficiency (1.4%).
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Affiliation(s)
- Kun-Bin Cai
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan
| | - Hsiu-Ying Huang
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan
| | - Meng-Lin Hsieh
- Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan 320314, Taiwan
| | - Po-Wen Chen
- Physics Division, Institute of Nuclear Energy Research, Taoyuan 325207, Taiwan
| | - Shou-En Chiang
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan
| | - Sheng Hsiung Chang
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan
| | - Ji-Lin Shen
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan
| | - Wei-Ren Liu
- Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan 320314, Taiwan
- R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 320314, Taiwan
| | - Chi-Tsu Yuan
- Department of Physics, Chung Yuan Christian University, Taoyuan 320314, Taiwan
- R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 320314, Taiwan
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15
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Matsumoto I, Sekiya R, Fukui H, Sun RD, Haino T. Electrochromism of Nanographenes in the Near‐Infrared Region. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ikuya Matsumoto
- Hiroshima Daigaku - Higashihiroshima Campus: Hiroshima Daigaku chemistry JAPAN
| | - Ryo Sekiya
- Hiroshima Daigaku - Higashihiroshima Campus: Hiroshima Daigaku chemistry JAPAN
| | - Hiroji Fukui
- Sekisui Chemical Co, Ltd Advanced Technology Institute, Corporate R&D Center 2-1 Hyakuyama, Shimamoto-cho, Mishima-gun, Osaka JAPAN
| | - Ren-De Sun
- Sekisui Chemical Co., Ltd. Advanced Technology Institute, Corporate R&D Center 2-1 Hyakuyama, Shimamoto-cho, Mishima-gun Osaka JAPAN
| | - Takeharu Haino
- Graduate School of Science, Hiroshima University Department of Chemistry 1-3-1 Kagamiyama 739-8526 Higashi-Hiroshima JAPAN
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16
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Xue Y, Jiang S, Zhong H, Chen Z, Wang F. Photo‐Induced Polymer Cyclization via Supramolecular Confinement of Cyanostilbenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202110766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yuncong Xue
- CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering Hefei National Laboratory for Physical Science at the Microscale University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Sixun Jiang
- CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering Hefei National Laboratory for Physical Science at the Microscale University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Hua Zhong
- CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering Hefei National Laboratory for Physical Science at the Microscale University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Ze Chen
- CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering Hefei National Laboratory for Physical Science at the Microscale University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Feng Wang
- CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering Hefei National Laboratory for Physical Science at the Microscale University of Science and Technology of China Hefei Anhui 230026 P. R. China
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17
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Ghaffarkhah A, Hosseini E, Kamkar M, Sehat AA, Dordanihaghighi S, Allahbakhsh A, van der Kuur C, Arjmand M. Synthesis, Applications, and Prospects of Graphene Quantum Dots: A Comprehensive Review. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2102683. [PMID: 34549513 DOI: 10.1002/smll.202102683] [Citation(s) in RCA: 82] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 08/12/2021] [Indexed: 05/24/2023]
Abstract
Graphene quantum dot (GQD) is one of the youngest superstars of the carbon family. Since its emergence in 2008, GQD has attracted a great deal of attention due to its unique optoelectrical properties. Non-zero bandgap, the ability to accommodate functional groups and dopants, excellent dispersibility, highly tunable properties, and biocompatibility are among the most important characteristics of GQDs. To date, GQDs have displayed significant momentum in numerous fields such as energy devices, catalysis, sensing, photodynamic and photothermal therapy, drug delivery, and bioimaging. As this field is rapidly evolving, there is a strong need to identify the emerging challenges of GQDs in recent advances, mainly because some novel applications and numerous innovations on the ease of synthesis of GQDs are not systematically reviewed in earlier studies. This feature article provides a comparative and balanced discussion of recent advances in synthesis, properties, and applications of GQDs. Besides, current challenges and future prospects of these emerging carbon-based nanomaterials are also highlighted. The outlook provided in this review points out that the future of GQD research is boundless, particularly if upcoming studies focus on the ease of purification and eco-friendly synthesis along with improving the photoluminescence quantum yield and production yield of GQDs.
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Affiliation(s)
- Ahmadreza Ghaffarkhah
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Ehsan Hosseini
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Milad Kamkar
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Ali Akbari Sehat
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Sara Dordanihaghighi
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Ahmad Allahbakhsh
- Department of Materials and Polymer Engineering, Faculty of Engineering, Hakim Sabzevari University, Sabzevar, Iran
| | - Colin van der Kuur
- ZEN Graphene Solutions, 210-1205 Amber Dr., Thunder Bay, ON, P7B 6M4, Canada
| | - Mohammad Arjmand
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
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18
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Sekiya R, Haino T. Nanographene - A Scaffold of Two-Dimensional Materials. CHEM REC 2021; 22:e202100257. [PMID: 34962042 DOI: 10.1002/tcr.202100257] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 12/03/2021] [Indexed: 11/07/2022]
Abstract
Substances can be divided into 0D to 3D species based on the number of repeating units (atom, ion, and molecule) and their arrangements in space (point, linear, layer, and solid). Discrete substances belong to 0D species, polymers are examples of 1D species, and molecular crystals are 3D species. Most of the substances belong to one of these species. On the other hand, those categorized into 2D species wherein the repeating units organize a layer are less explored. 2D species have a surface and edges. The incorporation of these structural features into a molecular design can realize multifunctionalized systems that are difficult to achieve by conventional organic synthesis. The development of 2D species is, therefore, the frontier of organic, inorganic, and polymer chemistry. Nanographenes (NGs) are suitable scaffolds for realizing 2D species due to several factors, such as chemical stability and oxygen-containing functional groups on the surface and on the edge, allowing postsynthetic modifications. Our group has utilized NGs with tens of nanometers in diameters for developing 2D species. Carboxy groups on the edge enable us to install various substituents into NGs, offering NG-based functional materials. These studies demonstrate that the integration of NGs with organic chemistry can widen the scope of their applications other than optical materials that are a main application of NGs. We introduce our recent studies on the development of NG-based functional materials realized by postsynthetic modifications. We hope that this account will contribute to the development of the chemistry of 2D species.
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Affiliation(s)
- Ryo Sekiya
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
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19
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Xue Y, Jiang S, Zhong H, Chen Z, Wang F. Photo-Induced Polymer Cyclization via Supramolecular Confinement of Cyanostilbenes. Angew Chem Int Ed Engl 2021; 61:e202110766. [PMID: 34714571 DOI: 10.1002/anie.202110766] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/13/2021] [Indexed: 12/25/2022]
Abstract
Efficient synthesis of cyclic polymers has received much attention in polymer chemistry field. Although photochemical cycloaddition of terminal π-bonded units provides a plausible way toward cyclic polymerization, it remains challenging to avoid side reactions by manipulating the reaction selectivity. Herein supramolecular confinement has been developed as a promising strategy to address this issue, by introducing highly directional hydrogen bonds to the photo-reactive cyanostilbenes. The cyanostilbenes units on both ends of a telechelic macromonomer are orientationally aligned with high local concentrations, yielding [2+2] photo-cycloaddition products upon 430 nm light irradiation. It leads to the formation of cyclic polymers in the self-assembled state, in stark contrast to Z-E isomerization of cyanostilbenes in the monomeric state. Overall, supramolecular confinement effect exemplified in the current study provides new avenues toward cyclic topological polymers with high synthetic efficiency.
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Affiliation(s)
- Yuncong Xue
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Sixun Jiang
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Hua Zhong
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Ze Chen
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Feng Wang
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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20
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Chen W, Shen J, Wang Z, Liu X, Xu Y, Zhao H, Astruc D. Turning waste into wealth: facile and green synthesis of carbon nanodots from pollutants and applications to bioimaging. Chem Sci 2021; 12:11722-11729. [PMID: 34659707 PMCID: PMC8442693 DOI: 10.1039/d1sc02837e] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 08/01/2021] [Indexed: 11/25/2022] Open
Abstract
In an effort to turn waste into wealth, Reactive Red 2 (RR2), a common and refractory organic pollutant in industrial wastewater, has been employed for the first time as a precursor to synthesize carbon nanodots (CNDs) by a facile, green and low-cost route, without utilization of any strong acids or other oxidizers. The detailed characterizations have confirmed that the synthesized CNDs exhibit good water dispersibility, with a mean particle size of 2.43 nm and thickness of 1-3 layers. Importantly, the excellent fluorescence properties and much reduced biotoxicity of the CNDs confer its potential applications in further biological imaging, which has been successfully verified in both in vitro (cell culture) and in vivo (zebrafish) model systems. Thus, it is demonstrated that the synthesized CNDs exhibit nice biocompatibility and fluorescence properties for bioimaging. This work not only provides a novel economical and environmentally friendly approach in recycling a chemical pollutant, but also greatly promotes the potential application of CNDs in biological imaging.
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Affiliation(s)
- Weifeng Chen
- College of Materials and Chemical Engineering, Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University Yichang Hubei 443002 P. R. China
| | - Jialu Shen
- College of Materials and Chemical Engineering, Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University Yichang Hubei 443002 P. R. China
| | - Zuo Wang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University Lanzhou Gansu 730000 P. R. China
| | - Xiang Liu
- College of Materials and Chemical Engineering, Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University Yichang Hubei 443002 P. R. China
| | - Yanyi Xu
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University Lanzhou Gansu 730000 P. R. China
| | - Haiyu Zhao
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University Lanzhou Gansu 730000 P. R. China
| | - Didier Astruc
- ISM, UMR CNRS No. 5255, Univ. Bordeaux 351 Cours de la Libération 33405 Talence Cedex France
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21
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Sekiya R, Haino T. Chemical Modification of Nanographenes and Their Functions. J SYN ORG CHEM JPN 2021. [DOI: 10.5059/yukigoseikyokaishi.79.743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ryo Sekiya
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University
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22
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Affiliation(s)
- Ikuya Matsumoto
- Department of Chemistry Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima 739-8526 Japan
| | - Ryo Sekiya
- Department of Chemistry Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima 739-8526 Japan
| | - Takeharu Haino
- Department of Chemistry Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima 739-8526 Japan
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23
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Matsumoto I, Sekiya R, Haino T. Self-Assembly of Nanographenes. Angew Chem Int Ed Engl 2021; 60:12706-12711. [PMID: 33689195 DOI: 10.1002/anie.202101992] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Indexed: 12/14/2022]
Abstract
Suitably decorated small aromatic systems can organize stacked structures that display interesting properties arising from their unique morphologies. Although nanographenes produced by top-down methods have graphitic domains and can in principle be applied for such supramolecular systems, to our knowledge, no such example has been reported thus far. This is partly because of their limited solubility in organic solvents and partly because of their wide lateral size distribution. To realize nanographene-based supramolecular aggregates, nanographenes carrying alkyl chains with narrow lateral size distributions are employed. We find that the nanographenes undergo self-assembly and that self-assembly is regulated by concentration, solvent polarity, temperature, and sonication. Optical measurements and AFM images indicate that stacked structures are possible candidates for aggregates. A molecular mechanics calculation models the interactions in the aggregates. The nanographenes showed concentration-dependent morphologies on mica, stacked structures at low concentrations and polymer-like network structures on mica at higher concentrations.
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Affiliation(s)
- Ikuya Matsumoto
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Ryo Sekiya
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
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24
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Matsumoto I, Sekiya R, Haino T. Nanographenes from Distinct Carbon Sources. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200381] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ikuya Matsumoto
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Ryo Sekiya
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
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25
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Nishitani S, Sekiya R, Matsumoto I, Haino T. Blueish-white-light-emitting Nanographenes Developed by Pd-catalyzed Suzuki-Miyaura Cross Coupling Reactions. CHEM LETT 2021. [DOI: 10.1246/cl.200844] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Shohei Nishitani
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Ryo Sekiya
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Ikuya Matsumoto
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
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26
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Abstract
Nanographenes (NGs) have recently emerged as new carbon materials. Their nanoscale size results in a size-dependent quantum confinement effect, opening the band gap by a few eV. This energy gap allows NGs to be applied as optical materials. This property has attracted researchers across multiple scientific fields. The photophysical properties of NGs can be manipulated by introducing organic groups onto their basal planes and/or into their edges. In addition, the integration of organic functional groups into NGs results in NG-based hybrid materials. These features make the post-synthetic modification of NGs an active research area. As obtainable information on chemically functionalized NGs is limited owing to their nonstoichiometry and structural uncertainty, their structural characterization requires a combination of multiple spectroscopic methods. Therefore, information on the characterization procedures of recently published chemically functionalized NGs is of value for advancing the field of NG-based hybrid materials. The present review focuses on the structural characterization of chemically functionalized NGs. It is hoped that this review will help to advance this field.
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Affiliation(s)
- Ryo Sekiya
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
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27
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Sekiya R, Haino T. Chemically Functionalized Two-Dimensional Carbon Materials. Chem Asian J 2020; 15:2316-2328. [PMID: 32128984 DOI: 10.1002/asia.202000196] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Indexed: 12/13/2022]
Abstract
Nanographenes (NGs), also known as graphene quantum dots, have recently been developed as nanoscale graphene fragments. These nanocarbon species can be excited with UV light and emit light from the UV-to-visible region. This photoemission has received great attraction across multiple scientific fields. NGs can be produced by cutting off carbon sources or fusing small organic molecules to grow graphitic structures. Furthermore, the organic synthesis of NGs has been intensely studied. Recently, the number of research papers on postsynthetic modification of NGs has gradually increased. Installed organic groups can tune the properties of NGs and provide new functionalities, opening the door for the development of sophisticated carbon-based functional materials. This review sheds light on recent progress in the postsynthetic modification of NGs and provides a brief summary of their production methods.
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Affiliation(s)
- Ryo Sekiya
- Department of Chemistry Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1, Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1, Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
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28
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Nishitani S, Sekiya R, Haino T. Chirality-Embedded Nanographenes. Angew Chem Int Ed Engl 2020; 59:669-673. [PMID: 31670446 DOI: 10.1002/anie.201910040] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 10/27/2019] [Indexed: 12/18/2022]
Abstract
The development of chiral nanographenes has mostly been carried out by bottom-up methods and examples of species developed by the post-modification of nanographenes prepared by top-down methods remain limited. We show that the attachment of chiral functional groups onto the edge of nanographenes generates chirality on the surface. X-ray diffraction analysis and DFT calculations indicate that the chirality of the functional groups is transferred to the surface via steric interactions from the chiral center through the five-membered cyclic imide to the nanographene edge. The exciton coupling between the p-bromophenyl groups confirms that the functional groups are arranged on the armchair edges at distances that permit exciton coupling, which provides information about their relative orientation. These pieces of information help to elucidate the edge structure of nanographenes prepared by top-down methods.
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Affiliation(s)
- Shohei Nishitani
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
| | - Ryo Sekiya
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
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29
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Affiliation(s)
- Shohei Nishitani
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima 739-8526 Japan
| | - Ryo Sekiya
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima 739-8526 Japan
| | - Takeharu Haino
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima 739-8526 Japan
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30
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Yamato K, Sekiya R, Nishitani S, Haino T. Intrinsic Emission from Nanographenes. Chem Asian J 2019; 14:3213-3220. [DOI: 10.1002/asia.201900906] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/05/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Kairi Yamato
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1 Kagamiyama Hiroshima 739-8526 Japan
| | - Ryo Sekiya
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1 Kagamiyama Hiroshima 739-8526 Japan
| | - Shohei Nishitani
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1 Kagamiyama Hiroshima 739-8526 Japan
| | - Takeharu Haino
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1 Kagamiyama Hiroshima 739-8526 Japan
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31
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Hirao T, Hisano N, Akine S, Kihara SI, Haino T. Ring–Chain Competition in Supramolecular Polymerization Directed by Molecular Recognition of the Bisporphyrin Cleft. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01012] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Takehiro Hirao
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Naoyuki Hisano
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Shigehisa Akine
- Graduate School of Natural Science and Technology and WPI Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Shin-ichi Kihara
- Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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32
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Yamato K, Sekiya R, Suzuki K, Haino T. Near-Infrared-Emitting Nitrogen-Doped Nanographenes. Angew Chem Int Ed Engl 2019; 58:9022-9026. [PMID: 31041841 DOI: 10.1002/anie.201901510] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 04/02/2019] [Indexed: 01/08/2023]
Abstract
The quantum-size effect, which enables nanographenes to emit photoluminescence (PL) in the UV to visible region, has inspired intense research. However, the control of the PL properties of nanographenes through manipulation of their π-system by post-modifications is not well developed. By utilizing a ring-closure reaction between an aromatic 1,2-dicarboxylic acid and a 1,8-naphthalenediamine derivative, which produces a perimidine framework, nitrogen-doped nanographenes were realized. Two nanographenes produced by a one-pot reaction of edge-oxidized nanographene (GQD-2) with 1,8-naphthalenediamine derivatives (GQD-1 a and GQD-1 b) displayed an absorption band extending to >1000 nm; furthermore, the PL wavelength of GQD-1 a was significantly red-shifted into the near-infrared (NIR) region in which it can be used for bioimaging. Time-dependent DFT calculations of model nanographenes showed that the functional groups narrow the HOMO-LUMO gap, realizing the NIR-emitting nanographenes.
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Affiliation(s)
- Kairi Yamato
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1, Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
| | - Ryo Sekiya
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1, Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
| | - Kaho Suzuki
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1, Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1, Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
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Yamato K, Sekiya R, Suzuki K, Haino T. Near‐Infrared‐Emitting Nitrogen‐Doped Nanographenes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901510] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Kairi Yamato
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1, Kagamiyama Higashi-Hiroshima 739-8526 Japan
| | - Ryo Sekiya
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1, Kagamiyama Higashi-Hiroshima 739-8526 Japan
| | - Kaho Suzuki
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1, Kagamiyama Higashi-Hiroshima 739-8526 Japan
| | - Takeharu Haino
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1, Kagamiyama Higashi-Hiroshima 739-8526 Japan
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Yamato K, Sekiya R, Abe M, Haino T. Separation of Spectroscopically Uniform Nanographenes. Chem Asian J 2019; 14:1786-1791. [PMID: 30507036 DOI: 10.1002/asia.201801632] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Indexed: 11/11/2022]
Abstract
Excitation-dependent photoluminescence (PL) is a well-known property of graphene quantum dots (GQDs). For the development of carbon-based photofunctional materials, GQDs possessing uniform PL properties are in high demand. A protocol has been established to separate spectroscopically uniform lipophilic GQD-1 a from a mixture of GQD-1 mainly composed of GQD-1 a and GQD-1 b. The mixture of GQD-1 was synthesized through the reaction of p-methoxybenzylamine with GQD-2 prepared from graphite by common oxidative exfoliation. Size-exclusion chromatography gave rise to GQD-1 a and GQD-1 b, with diameters of 19.8 and 4.9 nm, respectively. Large GQD-1 a showed that the PL was fairly independent of the excitation wavelengths, whereas the PL of small GQD-1 b was dependent on excitation. The excitation-dependent nature is most likely to be associated with the structures of sp2 domains on the graphene surfaces. The large sp2 -conjugated surface of GQD-1 a is likely to possess well-developed and large sp2 domains, the band gaps of which do not significantly vary. The small sp2 -conjugated surface of GQD-1 b produces small sp2 -conjugated domains that generate band gaps differing with domain sizes.
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Affiliation(s)
- Kairi Yamato
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Ryo Sekiya
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Manabu Abe
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Takeharu Haino
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
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Scharl T, Ferrer-Ruiz A, Saura-Sanmartín A, Rodríguez-Pérez L, Herranz MÁ, Martín N, Guldi DM. Charge transfer in graphene quantum dots coupled with tetrathiafulvalenes. Chem Commun (Camb) 2019; 55:3223-3226. [PMID: 30806381 DOI: 10.1039/c8cc09990a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Water-soluble fluorescent graphene quantum dots have been successfully prepared through a top-down approach, that is, starting with graphite, and covalently functionalizing it with π-extended tetrathiafulvalene. Charge transfer investigations reveal noticeably slower charge recombination when compared with exTTF nanoconjugates featuring carbon nanodots, for which a larger presence of trap states is observed.
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Affiliation(s)
- Tobias Scharl
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander Universität Erlangen-Nürberg, Egerlandstr. 3, 91058 Erlangen, Germany.
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Xiao T, Zhong W, Qi L, Gu J, Feng X, Yin Y, Li ZY, Sun XQ, Cheng M, Wang L. Ring-opening supramolecular polymerization controlled by orthogonal non-covalent interactions. Polym Chem 2019. [DOI: 10.1039/c9py00312f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The π–π interaction has been successfully utilized to orthogonally regulate the supramolecular polymerization driven by quadruple hydrogen bonding.
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Matsumoto I, Sekiya R, Haino T. A protocol for size separation of nanographenes. RSC Adv 2019; 9:33843-33846. [PMID: 35528926 PMCID: PMC9073626 DOI: 10.1039/c9ra07528c] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 10/15/2019] [Indexed: 11/21/2022] Open
Abstract
Top-down methods are convenient preparative methods for nanographenes, although the products consist of graphene fragments with a broad size distribution. We show that a combination of dialysis membranes (50, 25, 15, 8, and 2 kD) can conveniently separate nanographenes into five size distributions. The separated nanographenes can be employed as starting materials for carbon-based functional materials. Top-down methods are convenient preparative methods for nanographenes, although the products consist of graphene fragments with a broad size distribution. We developed a simple protocol for size separation of nanographenes.![]()
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Affiliation(s)
- Ikuya Matsumoto
- Department of Chemistry
- Graduate School of Science
- Hiroshima University
- Hiroshima 739-8526
- Japan
| | - Ryo Sekiya
- Department of Chemistry
- Graduate School of Science
- Hiroshima University
- Hiroshima 739-8526
- Japan
| | - Takeharu Haino
- Department of Chemistry
- Graduate School of Science
- Hiroshima University
- Hiroshima 739-8526
- Japan
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Lu L, Zhou L, Chen J, Yan F, Liu J, Dong X, Xi F, Chen P. Nanochannel-Confined Graphene Quantum Dots for Ultrasensitive Electrochemical Analysis of Complex Samples. ACS NANO 2018; 12:12673-12681. [PMID: 30485066 DOI: 10.1021/acsnano.8b07564] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Herein, we present an electrochemical sensing platform based on nanochannel-confined graphene quantum dots (GQDs) that is able to detect a spectrum of small analytes in complex samples with high sensitivity. Vertically ordered mesoporous silica-nanochannel film (VMSF) is decorated on the supporting electrode, conferring the electrode with excellent antifouling and anti-interference properties through steric exclusion and electrostatic repulsion. The synthesized GQDs with different functionalities are confined in the nanochannels of VMSF through electrophoresis, serving as the recognition element and signal amplifier. Without the usual need of tedious pretreatment, ultrasensitive and fast detection of Hg2+, Cu2+, and Cd2+ (with limits of detection (LOD) of 9.8 pM, 8.3 pM, and 4.3 nM, respectively) and dopamine (LOD of 120 nM) in complex food (Hg2+-contaminated seafood), environmental (soil-leaching solution), and biological (serum) samples are realized as proof-of-concept demonstrations.
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Affiliation(s)
- Lili Lu
- Department of Chemistry , Zhejiang Sci-Tech University , 928 Second Avenue, Xiasha Higher Education Zone , Hangzhou 310018 , PR China
| | - Lin Zhou
- Department of Chemistry , Zhejiang Sci-Tech University , 928 Second Avenue, Xiasha Higher Education Zone , Hangzhou 310018 , PR China
| | - Jie Chen
- School of Chemical & Biomedical Engineering , Nanyang Technological University , 70 Nanyang Drive , Singapore 637457
| | - Fei Yan
- Department of Chemistry , Zhejiang Sci-Tech University , 928 Second Avenue, Xiasha Higher Education Zone , Hangzhou 310018 , PR China
| | - Jiyang Liu
- Department of Chemistry , Zhejiang Sci-Tech University , 928 Second Avenue, Xiasha Higher Education Zone , Hangzhou 310018 , PR China
| | - Xiaoping Dong
- Department of Chemistry , Zhejiang Sci-Tech University , 928 Second Avenue, Xiasha Higher Education Zone , Hangzhou 310018 , PR China
| | - Fengna Xi
- Department of Chemistry , Zhejiang Sci-Tech University , 928 Second Avenue, Xiasha Higher Education Zone , Hangzhou 310018 , PR China
| | - Peng Chen
- School of Chemical & Biomedical Engineering , Nanyang Technological University , 70 Nanyang Drive , Singapore 637457
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