1
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Order from disorder: Directed assembly of alkyl-π functional molecular liquids. Curr Opin Colloid Interface Sci 2022. [DOI: 10.1016/j.cocis.2022.101641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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2
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Dhingra S, Siddiqui I, Gupta SP, Jayakumar J, Jou JH, Pal SK. Solution-processable organic light-emitting diodes utilizing electroluminescent perylene tetraester-based columnar liquid crystals. SOFT MATTER 2022; 18:8850-8855. [PMID: 36374203 DOI: 10.1039/d2sm01235a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Herein, we reveal a homologous series of liquid crystals involving perylene tetraesters as the core connected to the four trialkoxyphenyl units at the periphery using the triazole moiety as the linker. A thorough analysis using differential scanning calorimetry, polarized optical microscopy, and small- and wide-angle X-ray scattering studies confirm that all the mesogens 1a-c hold a stable enantiotropic columnar mesophase. Suitable molecular orbital levels and excellent material photophysical and thermal properties encouraged the study of their electroluminescent properties. Due to this, a well designed solution-processable organic light emitting diode device structure is configured as ITO (125 nm)/poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) (35 nm)/host: x wt% emitter (x = 0.5, 1.0, 3.0, 5.0) (20 nm)/2,2'2''-(1,3,5-benzinetriyl)tris(1-phenyl-1-H-benzimidazole) (TPBi) (40 nm)/lithium fluoride (LiF) (1 nm)/aluminium (Al) (200 nm) using compounds 1a-c as emitters. 4,4',4''-Tris[phenyl(m-tolyl)amino]triphenylamine (m-MTDATA) and 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP) were chosen as two different host materials. The current density-voltage-luminance and current efficacy-luminance-power efficacy plots suggest that m-MTDATA is a better host than CBP. Amongst, device based on 1 wt% emitter 1c doped in the m-MTDATA host matrix displayed the best performance, with a maximum power efficacy of 17.2 lm W-1, current efficacy of 18.5 cd A-1, and external quantum efficiency of 6.3%.
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Affiliation(s)
- Shallu Dhingra
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, SAS Nagar, Knowledge City, Manauli, 140306, India.
| | - Iram Siddiqui
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan.
| | | | - Jayachandran Jayakumar
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan.
| | - Jwo-Huei Jou
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan.
| | - Santanu Kumar Pal
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, SAS Nagar, Knowledge City, Manauli, 140306, India.
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3
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Bai X, Sun Y, Jiang Y, Zhao G, Jiang J, Yuan C, Liu M. Circularly Polarized Luminescence from Solvent-Free Chiral Organic π-Liquids. Angew Chem Int Ed Engl 2021; 60:3745-3751. [PMID: 33170551 DOI: 10.1002/anie.202013550] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/04/2020] [Indexed: 12/30/2022]
Abstract
The solvent-free organic π-liquids have been attracting increasing attentions owing to the inherent optoelectronic properties accompanied by the advantages of non-volatility and high processability. Herein, we reported a series of naphthalene derivatives substituted with chiral branched alkyl chains, which are present as liquids (Nap1-3) or solid (Nap4) at room temperature, depending on the substitution positions. Circular dichroism (CD) and circularly polarized luminescence (CPL) were only observed for enantiomeric Nap2 (2,3-substituted) liquid. It is suggested that the chiral aggregation in the π-liquid leads to the CD signal and the chiral excimer resulting in the CPL performance. When achiral anthracene or pyrene was dissolved in Nap2, the π-liquid could serve as chirality and energy transfer media in which both CD and CPL emerged from the achiral anthracene. A CPL dissymmetry factor (|glum |) of anthracene reached to 5.2×10-2 when dissolved in chiral Nap2 liquid, which is nearly two orders of magnitude higher than that of the pure Nap2 π-liquid.
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Affiliation(s)
- Xue Bai
- Key laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China.,Department of Chemistry, School of Science, Tianjin University, Tianjin, 300354, China
| | - Yimeng Sun
- Key laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Yuqian Jiang
- Key laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Guangjiu Zhao
- Department of Chemistry, School of Science, Tianjin University, Tianjin, 300354, China
| | - Jian Jiang
- Key laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Chenhuan Yuan
- National Laboratory for Molecular Science (BNLMS), CAS Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Science, Beijing, 100190, China
| | - Minghua Liu
- Key laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China.,National Laboratory for Molecular Science (BNLMS), CAS Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Science, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100190, China
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4
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Bai X, Sun Y, Jiang Y, Zhao G, Jiang J, Yuan C, Liu M. Circularly Polarized Luminescence from Solvent‐Free Chiral Organic π‐Liquids. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202013550] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Xue Bai
- Key laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China
- Department of Chemistry School of Science Tianjin University Tianjin 300354 China
| | - Yimeng Sun
- Key laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China
| | - Yuqian Jiang
- Key laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China
| | - Guangjiu Zhao
- Department of Chemistry School of Science Tianjin University Tianjin 300354 China
| | - Jian Jiang
- Key laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China
| | - Chenhuan Yuan
- National Laboratory for Molecular Science (BNLMS) CAS Laboratory of Colloid, Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Science Beijing 100190 China
| | - Minghua Liu
- Key laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China
- National Laboratory for Molecular Science (BNLMS) CAS Laboratory of Colloid, Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Science Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100190 China
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5
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Zhang G, Zhu H, Chen J, Chen M, Kalwarczyk T, Hołyst R, Li H, Hao J. Self-Stabilized Giant Aggregates in Water from Room-Temperature Ionic Liquids with an Asymmetric Polar-Apolar-Polar Architecture. J Phys Chem B 2020; 124:4651-4660. [PMID: 32383605 DOI: 10.1021/acs.jpcb.0c02283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the assembly of four imidazolium bromides, each of which bears a naphthyl on one side of the imidazolium cation and a branched alkyl chain on the other. This design creates a new type of amphiphilic ionic liquid with an apolar-polar-apolar structure and a low melting point (mp, <-20 °C), which has not been achieved by reported counterparts bearing linear alkyl chains. In solvent-free states, microphase segregation occurs where polar and apolar domains arrange bicontinuously as proved by molecular dynamics (MD) simulations. When dispersed in water, self-stabilized giant aggregates formed with ultrahigh colloidal stability (up to years). MD simulations provide clues of discrete bicontinuous phases within the giant aggregates. These newly discovered self-assemblies provide a heterogeneous reservoir that can accommodate guest molecules including the highly apolar fullerene C60, paving the way for a wide range of potential applications.
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Affiliation(s)
- Geping Zhang
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, China
| | - Hongxia Zhu
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, China.,School of Light Industry and Engineering, Qilu University of Technology (Shandong Academy of Science), Jinan 250353, China
| | - Jingfei Chen
- Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266061, China
| | - Mengjun Chen
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, China.,School of Qilu Transportation, Shandong University, Jinan 250353, China
| | - Tomasz Kalwarczyk
- Department III, Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Robert Hołyst
- Department III, Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Hongguang Li
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, China
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, China
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6
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An Overview of Molecular Packing Mode in Two‐Dimensional Organic Nanomaterials via Supramolecular Assembly. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201800566] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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7
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Zielinska A, Takai A, Sakurai H, Saeki A, Leonowicz M, Nakanishi T. A Spin-Active, Electrochromic, Solvent-Free Molecular Liquid Based on Double-Decker Lutetium Phthalocyanine Bearing Long Branched Alkyl Chains. Chem Asian J 2018; 13:770-774. [DOI: 10.1002/asia.201800175] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Agnieszka Zielinska
- Frontier Molecules Group, International Center for Materials Nanoarchitectonics (WPI-MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
- Warsaw University of Technology; ul. Wołoska 141 Warsaw 02-507 Poland
| | - Atsuro Takai
- Frontier Molecules Group, International Center for Materials Nanoarchitectonics (WPI-MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Hiroya Sakurai
- Frontier Molecules Group, International Center for Materials Nanoarchitectonics (WPI-MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Akinori Saeki
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Marcin Leonowicz
- Warsaw University of Technology; ul. Wołoska 141 Warsaw 02-507 Poland
| | - Takashi Nakanishi
- Frontier Molecules Group, International Center for Materials Nanoarchitectonics (WPI-MANA); National Institute for Materials Science (NIMS); 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
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8
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Yamaoka R, Funahashi M. Liquid-Crystalline Phthalocyanine Derivatives Bearing Oligosiloxane Moieties: Soft Columnar Mesophases Stabilized by Nanosegregation. ChemistrySelect 2017. [DOI: 10.1002/slct.201702592] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ryutaro Yamaoka
- Department of Advanced Materials Science, Faculty of Engineering; Kagawa University, 2217-20 Hayashi-cho; Takamatsu, Kagawa 761-0396 Japan
| | - Masahiro Funahashi
- Department of Advanced Materials Science, Faculty of Engineering; Kagawa University, 2217-20 Hayashi-cho; Takamatsu, Kagawa 761-0396 Japan
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9
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Poppe M, Chen C, Ebert H, Poppe S, Prehm M, Kerzig C, Liu F, Tschierske C. Transition from nematic to gyroid-type cubic soft self-assembly by side-chain engineering of π-conjugated sticky rods. SOFT MATTER 2017; 13:4381-4392. [PMID: 28573294 DOI: 10.1039/c7sm00793k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A sequence of liquid crystalline phases, involving cybotactic nematics, a lamellar phase, bicontinuous cubics and triangular honeycombs, was observed for oligo(phenylene ethynylene) based X-shaped bolapolyphiles with two long lateral alkyl chains and sticky ends provided by glycerol groups. In the cubic phase with Ia3[combining macron]d lattice - which is tailored by alkyl chain engineering - the aromatic cores are organized on the gyroid minimal surface in 3D curved layers of almost parallel aligned π-conjugated rods. It is shown that this type of cubic phase is a general mode of soft self-assembly of X-shaped bolapolyphiles at the cross-over from the (long or short range) lamellar to the triangular honeycomb-like organization. Cubic phase formation is found only in a narrow range with respect to temperature and chain-length for the non-fluorinated compounds and in much wider ranges for related core-fluorinated molecules.
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Affiliation(s)
- Marco Poppe
- Institute of Chemistry, Martin-Luther University Halle-Wittenberg, Kurt-Mothes Str. 2, D-06120 Halle/Saale, Germany.
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10
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Alaasar M, Prehm M, Poppe S, Tschierske C. Development of Polar Order by Liquid‐Crystal Self‐Assembly of Weakly Bent Molecules. Chemistry 2017; 23:5541-5556. [DOI: 10.1002/chem.201606035] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Indexed: 01/23/2023]
Affiliation(s)
- Mohamed Alaasar
- Institute of Chemistry Martin Luther University Halle-Wittenberg Kurt Mothes Str. 2 06120 Halle (Saale) Germany
- Department of Chemistry Faculty of Science Cairo University Giza Egypt
| | - Marko Prehm
- Institute of Chemistry Martin Luther University Halle-Wittenberg Kurt Mothes Str. 2 06120 Halle (Saale) Germany
| | - Silvio Poppe
- Institute of Chemistry Martin Luther University Halle-Wittenberg Kurt Mothes Str. 2 06120 Halle (Saale) Germany
| | - Carsten Tschierske
- Institute of Chemistry Martin Luther University Halle-Wittenberg Kurt Mothes Str. 2 06120 Halle (Saale) Germany
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11
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Ghosh A, Nakanishi T. Frontiers of solvent-free functional molecular liquids. Chem Commun (Camb) 2017; 53:10344-10357. [DOI: 10.1039/c7cc05883g] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The breakthrough of functional molecular liquids (FMLs) in cutting-edge research and their fundamental liquid features on the basis of molecular architectures are highlighted in this Feature Article.
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Affiliation(s)
- Avijit Ghosh
- International Center for Materials Nanoarchitectonics (WPI-MANA)
- National Institute for Materials Science (NIMS)
- Tsukuba 305-0044
- Japan
| | - Takashi Nakanishi
- International Center for Materials Nanoarchitectonics (WPI-MANA)
- National Institute for Materials Science (NIMS)
- Tsukuba 305-0044
- Japan
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12
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Zhu H, Zhang G, Chen M, Zhou S, Li G, Wang X, Zhu Q, Li H, Hao J. Naphthalene-Functionalized, Photoluminescent Room Temperature Ionic Liquids Bearing Small Counterions. Chemistry 2016; 22:6286-93. [DOI: 10.1002/chem.201504764] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Indexed: 12/15/2022]
Affiliation(s)
- Hongxia Zhu
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Ministry of Education; Shandong University; Jinan 250100 Shandong Province China
| | - Geping Zhang
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Ministry of Education; Shandong University; Jinan 250100 Shandong Province China
| | - Mengjun Chen
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Ministry of Education; Shandong University; Jinan 250100 Shandong Province China
| | - Shengju Zhou
- State Key Laboratory of Solid Lubrication & Laboratory of Clean Energy Chemistry and Materials, Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Lanzhou 730000 Gansu Province China
| | - Guihua Li
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Ministry of Education; Shandong University; Jinan 250100 Shandong Province China
| | - Xiaolin Wang
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Ministry of Education; Shandong University; Jinan 250100 Shandong Province China
| | - Qingzeng Zhu
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Ministry of Education; Shandong University; Jinan 250100 Shandong Province China
| | - Hongguang Li
- State Key Laboratory of Solid Lubrication & Laboratory of Clean Energy Chemistry and Materials, Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Lanzhou 730000 Gansu Province China
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Ministry of Education; Shandong University; Jinan 250100 Shandong Province China
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13
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Salamończyk M, Pociecha D, Nowak-Król A, Koszelewski D, Gryko DT, Górecka E. Liquid-Crystalline Properties oftrans-A2B2-Porphyrins with Extended π-Electron Systems. Chemistry 2015; 21:7384-8. [DOI: 10.1002/chem.201500295] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Indexed: 11/10/2022]
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14
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Saha A, Adamcik J, Bolisetty S, Handschin S, Mezzenga R. Fibrillar networks of glycyrrhizic acid for hybrid nanomaterials with catalytic features. Angew Chem Int Ed Engl 2015; 54:5408-12. [PMID: 25759108 DOI: 10.1002/anie.201411875] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Revised: 02/13/2015] [Indexed: 11/05/2022]
Abstract
Self-assembly of the naturally occurring sweetening agent, glycyrrhizic acid (GA) in water is studied by small-angle X-ray scattering and microscopic techniques. Statistical analysis on atomic force microscopy images reveals the formation of ultralong GA fibrils with uniform thickness of 2.5 nm and right-handed twist with a pitch of 9 nm, independently of GA concentration. Transparent nematic GA hydrogels are exploited to create functional hybrid materials. Two-fold and three-fold hybrids are developed by introducing graphene oxide (GO) and in situ-synthesized gold nanoparticles (Au NPs) in the hydrogel matrix for catalysis applications. In the presence of GO, the catalytic efficiency of Au NPs in the reduction of p-nitrophenol to p-aminophenol is enhanced by 2.5 times. Gold microplate single crystals are further synthesized in the GA hydrogel, expanding the scope of these hybrids and demonstrating their versatility in materials design.
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Affiliation(s)
- Abhijit Saha
- Laboratory of Food & Soft Materials Science, Institute of Food, Nutrition & Health, Department of Health Sciences & Technology, ETH Zürich, Schmelzbergstrasse 9, LFO E23, 8092 Zürich (Switzerland)
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15
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Saha A, Adamcik J, Bolisetty S, Handschin S, Mezzenga R. Fibrillar Networks of Glycyrrhizic Acid for Hybrid Nanomaterials with Catalytic Features. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411875] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Lu F, Nakanishi T. Alkyl- π engineering in state control toward versatile optoelectronic soft materials. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2015; 16:014805. [PMID: 27877748 PMCID: PMC5036497 DOI: 10.1088/1468-6996/16/1/014805] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 01/15/2015] [Accepted: 01/17/2015] [Indexed: 05/30/2023]
Abstract
Organic π-conjugated molecules with extremely rich and tailorable electronic and optical properties are frequently utilized for the fabrication of optoelectronic devices. To achieve high solubility for facile solution processing and desirable softness for flexible device fabrication, the rigid π units were in most cases attached by alkyl chains through chemical modification. Considerable numbers of alkylated-π molecular systems with versatile applications have been reported. However, a profound understanding of the molecular state control through proper alkyl chain substitution is still highly demanded because effective applications of these molecules are closely related to their physical states. To explore the underlying rule, we review a large number of alkylated-π molecules with emphasis on the interplay of van der Waals interactions (vdW) of the alkyl chains and π-π interactions of the π moieties. Based on our comprehensive investigations of the two interactions' impacts on the physical states of the molecules, a clear guidance for state control by alkyl-π engineering is proposed. Specifically, either with proper alkyl chain substitution or favorable additives, the vdW and π-π interactions can be adjusted, resulting in modulation of the physical states and optoelectronic properties of the molecules. We believe the strategy summarized here will significantly benefit the alkyl-π chemistry toward wide-spread applications in optoelectronic devices.
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Affiliation(s)
- Fengniu Lu
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) 1-2-1 Sengen, Tsukuba 305-0047, Japan
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17
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Parveen A, Sughanya V, Nagarajan S. Efficient synthesis of highly soluble and functionalized fulleropyrrolidines. RSC Adv 2015. [DOI: 10.1039/c4ra15057k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
New functionalized fulleropyrrolidines with high emission and absorption.
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Affiliation(s)
| | | | - Samuthira Nagarajan
- Department of Chemistry
- Central University of Tamil Nadu
- Thiruvarur 601 101
- India
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