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Li X, Zhang X, Kalai Selvan G, Arumugam S, Huang F, Wu Y, Yao J. Crystal Growth, Structure, Resistivity, Magnetic, and Photoelectric Properties of One-Dimensional Selenometallate Ba 2 BiFeSe 5. Chem Asian J 2016; 11:3436-3442. [PMID: 27653016 DOI: 10.1002/asia.201601230] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Indexed: 11/12/2022]
Abstract
Low-dimensional materials have attracted extensive research interest in recent years owing to their interesting structural chemistry and physical properties, which will greatly deepen our knowledge of these materials and could lead to additional breakthroughs in the future. Herein we have synthesized and characterized Ba2 BiFeSe5 , which adopts a quasi-one-dimensional structure and possesses some fascinating physical properties. The sharp divergences between the field-cooled (FC) and the zero-field-cooled (ZFC) data and the rather small magnetic moment per Fe3+ (0.07 μB ) strongly suggest that the title compound is weakly ferromagnetic with a high magnetic transition temperature above room temperature, which is controlled by competing super-exchange interactions within and between [FeBiSe5 ]∞ anionic ladders. Moreover, with its narrow bandgap of 0.95 eV, Ba2 BiFeSe5 shows photoelectric properties with a photocurrent density of approximately 30 mA cm2 at 5 V. Our study demonstrates that Ba2 FeBiSe5 might be a new type of multifunctional material that deserves further investigation.
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Affiliation(s)
- Xiaoshuang Li
- Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xian Zhang
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - G Kalai Selvan
- Centre for High Pressure Research, School of Physics Bharathidasan University, Tiruchirapalli, 620024, India
| | - S Arumugam
- Centre for High Pressure Research, School of Physics Bharathidasan University, Tiruchirapalli, 620024, India
| | - Fuqiang Huang
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Yicheng Wu
- Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Jiyong Yao
- Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
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Tahara K, Kaneko K, Katayama K, Itano S, Nguyen CH, Amorim DDD, De Feyter S, Tobe Y. Formation of Multicomponent Star Structures at the Liquid/Solid Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:7032-7040. [PMID: 26061362 DOI: 10.1021/acs.langmuir.5b01507] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
To demonstrate key roles of multiple interactions between multiple components and multiple phases in the formation of an uncommon self-assembling pattern, we present here the construction of a porous hexagonal star (h-star) structure using a trigonal molecular building block at the liquid/solid interface. For this purpose, self-assembly of hexaalkoxy-substituted dehydrobenzo[12]annulene derivatives DBA-OCns was investigated at the tetradecane/graphite interface by means of scanning tunneling microscopy (STM). Monolayer structures were significantly influenced by coadsorbed tetradecane molecules depending on the alkyl chains length (C13-C16) of DBA-OCn. However, none of DBA-OCn molecules formed the expected trigonal complexes, indicating that an additional driving force is necessary for the formation of the trigonal complex and its assembly into the h-star structure. As a first approach, we employed the "guest induced structural change" for the formation of the h-star structure. In the presence of two guest molecules, nonsubstituted DBA and hexakis(phenylethynyl)benzene which fit the respective pores, an h-star structure was formed by DBA-OC15 at the tetradecane/graphite interface. Moreover, a tetradecane molecule was coadsorbed between a pair of alkyl chains of DBA-OC15, thereby blocking the interdigitation of the alkyl chain pairs. Therefore, the h-star structure results from the self-assembly of the four molecular components including the solvent molecule. The second approach is based on aggregation of perfluoroalkyl chains via fluorophilicity of DBA-F, in which the perfluoroalkyl groups are substituted at the end of three alkyl chains of DBA-OCn via p-phenylene linkers. A trigonal complex consisting of DBA-F and three tetradecane molecules formed an h-star structure, in which the perfluoroalkyl groups that orient into the alkane solution phase aggregated at the hexagonal pore via fluorophilicity. The present result provides useful insight into the design and control of complex molecular self-assembly at the liquid/solid interface.
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Affiliation(s)
- Kazukuni Tahara
- †Division of Frontier Materials Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kyohei Kaneko
- †Division of Frontier Materials Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Keisuke Katayama
- †Division of Frontier Materials Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Shintaro Itano
- †Division of Frontier Materials Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Chi Huan Nguyen
- †Division of Frontier Materials Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Deborah D D Amorim
- †Division of Frontier Materials Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Steven De Feyter
- ‡Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200 F, 3001 Leuven, Belgium
| | - Yoshito Tobe
- †Division of Frontier Materials Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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Kim MK, Xue Y, Pašková T, Zimmt MB. Monolayer patterning using ketone dipoles. Phys Chem Chem Phys 2014; 15:12466-74. [PMID: 23632754 DOI: 10.1039/c3cp50808k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The self-assembly of multi-component monolayers with designed patterns requires molecular recognition among components. Dipolar interactions have been found to influence morphologies of self-assembled monolayers and can affect molecular recognition functions. Ketone groups have large dipole moments (2.6 D) and are easily incorporated into molecules. The potential of ketone groups for dipolar patterning has been evaluated through synthesis of two 1,5-disubstituted anthracenes bearing mono-ketone side chains, STM characterization of monolayers self-assembled from their single and two component solutions and molecular mechanics simulations to determine their self-assembly energetics. The results reveal that (i) anthracenes bearing self-repulsive mono-ketone side chains assemble in an atypical monolayer morphology that establishes dipolar attraction, instead of repulsion, between ketones in adjacent side chains; (ii) pairs of anthracene molecules whose self-repulsive ketone side chains are dipolar complementary spontaneously assemble compositionally patterned monolayers, in which the two components segregate into neighboring, single component columns, driven by side chain dipolar interactions; (iii) compositionally patterned monolayers also assemble from dipolar complementary anthracene pairs that employ different dipolar groups (ketones or CF2 groups) in their side chains; (iv) the ketone group, with its larger dipole moment and size, provides comparable driving force for patterned monolayer formation to that of the smaller dipole, and smaller size, CF2 group.
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Affiliation(s)
- Min Kyoung Kim
- Department of Chemistry, Brown University, Providence, RI, USA
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Yan HJ, Liu J, Wang D, Wan LJ. Two-dimensional self-assemblies of telechelic organic compounds: structure and surface host-guest chemistry. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2013; 371:20120302. [PMID: 24000354 DOI: 10.1098/rsta.2012.0302] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Guiding the self-assembly of different types of functional molecules into well-defined structures on surfaces is beneficial for both fundamental surface and interface study and emerging application fields, especially molecular and organic electronics. This review focuses on understanding the two-dimensional self-assembly process of telechelic organics, which feature alkoxylene chains terminated with carboxyl groups. With the combined flexibility of alkyl chains and directionality of carboxyl groups, telechelic organics show unique assembly behaviour on two-dimensional surfaces. By increasing the length of the alkoxylene chains, the cavities in the nanoporous networks of telechelic trimesic acid (1,3,5-benzene tricarboxylic acid) derivatives change from hexagonal cavities to irregular cavities on a highly oriented pyrolytic graphite surface. The nanoporous networks provide a flexible host template for host-guest supramolecular chemistry because the cavities framed by the flexible alkoxylene chains can be changed in accordance with the sizes/shapes of the guest molecules. Furthermore, the terminal carboxylic group can form a hydrogen bond with another hydrogen bond partner, leading to multi-component structural motifs and hierarchical assemblies. The unique assembly behaviour of telechelic organics makes them promising structures as important building blocks for the design and construction of complex self-assembled nanoarchitectures.
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Affiliation(s)
- Hui-Juan Yan
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, and Beijing National Laboratory for Molecular Sciences, Beijing 100190, People's Republic of China
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Yang ZY, Tao Y, Chen T, Yan HJ, Wang ZX. Hydrogen bonding network of truxenone on a graphite surface studied with scanning tunneling microscopy and theoretical computation. Phys Chem Chem Phys 2013; 15:2105-8. [DOI: 10.1039/c2cp42828h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Liu J, Chen T, Deng X, Wang D, Pei J, Wan LJ. Chiral Hierarchical Molecular Nanostructures on Two-Dimensional Surface by Controllable Trinary Self-Assembly. J Am Chem Soc 2011; 133:21010-5. [DOI: 10.1021/ja209469d] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jia Liu
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China,
and Beijing National Laboratory for Molecular Sciences, Beijing 100190,
China
| | - Ting Chen
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China,
and Beijing National Laboratory for Molecular Sciences, Beijing 100190,
China
| | - Xin Deng
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China,
and Beijing National Laboratory for Molecular Sciences, Beijing 100190,
China
| | - Dong Wang
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China,
and Beijing National Laboratory for Molecular Sciences, Beijing 100190,
China
| | - Jian Pei
- College of Chemistry
and Molecular
Engineering, Peking University, and Beijing
National Laboratory for Molecular Sciences, Beijing 100190, China
| | - Li-Jun Wan
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China,
and Beijing National Laboratory for Molecular Sciences, Beijing 100190,
China
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