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Kanakala MB, Yelamaggad CV. Exceptional dual fluorescent, excited-state intramolecular proton-transfer (ESIPT) columnar liquid crystals characterized by J-stacking and large Stokes shifts. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115879] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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2
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Bala I, Gupta SP, Kumar S, Singh H, De J, Sharma N, Kailasam K, Pal SK. Hydrogen-bond mediated columnar liquid crystalline assemblies of C 3-symmetric heptazine derivatives at ambient temperature. SOFT MATTER 2018; 14:6342-6352. [PMID: 30027180 DOI: 10.1039/c8sm00834e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A new class of hydrogen (H) bonded fluorescent liquid crystals (FLCs) based on a newly discovered s-heptazine fluorophore discotic component have been synthesized. The tendency of the s-heptazine core to form H-bonded LCs has been explored for the first time. Interestingly, the pure heptazine derivatives (non-mesomorphic) on complexation with tri-alkoxy benzoic acids exhibit enantiotropic columnar mesomorphism over a wide range of temperatures including room temperature. This indicates the strength of the resulting H-bonded complexes. The H-bonded supramolecular complexes were studied through FT-IR, temperature dependent FT-IR and NMR studies and H-D exchange studies, and their thermal behaviour was deduced through polarized optical microscopy (POM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) studies. Because of the inherently fluorescent pure heptazine derivative, the resulting complexes exhibit fluorescent behaviour in the solution state as well as in the solid state.
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Affiliation(s)
- Indu Bala
- Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, SAS Nagar, Mohali 140306, India.
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3
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Truong TNB, Savagatrup S, Jeon I, Swager TM. Modular Synthesis of Polymers Containing 2,5-di(thiophenyl)-N-arylpyrrole. JOURNAL OF POLYMER SCIENCE. PART A, POLYMER CHEMISTRY 2018; 56:1133-1139. [PMID: 30344367 PMCID: PMC6192053 DOI: 10.1002/pola.28990] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 02/19/2018] [Indexed: 06/08/2023]
Abstract
A modular facile route has been developed to synthesize functionalized 2,5-di(thiophen-2-yl)-1-H-arylpyrroles from readily available starting materials. These units are compatible with various polymerization conditions and are versatile building blocks for conjugated polymers. The polymers show high thermal stability and solubility in a number of solvents. Characterization of the polymers reveals a correlation between molecular packing, controllable by polymer design, and charge carrier mobility.
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Affiliation(s)
- Tran N. B. Truong
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Suchol Savagatrup
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Intak Jeon
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Timothy M. Swager
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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4
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Esposito CL, Kirilov P, Roullin VG. Organogels, promising drug delivery systems: an update of state-of-the-art and recent applications. J Control Release 2018; 271:1-20. [DOI: 10.1016/j.jconrel.2017.12.019] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 12/15/2017] [Accepted: 12/17/2017] [Indexed: 12/23/2022]
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5
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Goossens K, Lava K, Bielawski CW, Binnemans K. Ionic Liquid Crystals: Versatile Materials. Chem Rev 2016; 116:4643-807. [PMID: 27088310 DOI: 10.1021/cr400334b] [Citation(s) in RCA: 411] [Impact Index Per Article: 51.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This Review covers the recent developments (2005-2015) in the design, synthesis, characterization, and application of thermotropic ionic liquid crystals. It was designed to give a comprehensive overview of the "state-of-the-art" in the field. The discussion is focused on low molar mass and dendrimeric thermotropic ionic mesogens, as well as selected metal-containing compounds (metallomesogens), but some references to polymeric and/or lyotropic ionic liquid crystals and particularly to ionic liquids will also be provided. Although zwitterionic and mesoionic mesogens are also treated to some extent, emphasis will be directed toward liquid-crystalline materials consisting of organic cations and organic/inorganic anions that are not covalently bound but interact via electrostatic and other noncovalent interactions.
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Affiliation(s)
- Karel Goossens
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS) , Ulsan 689-798, Republic of Korea.,Department of Chemistry, KU Leuven , Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium
| | - Kathleen Lava
- Department of Chemistry, KU Leuven , Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium.,Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 S4, B-9000 Ghent, Belgium
| | - Christopher W Bielawski
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS) , Ulsan 689-798, Republic of Korea.,Department of Chemistry and Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Republic of Korea
| | - Koen Binnemans
- Department of Chemistry, KU Leuven , Celestijnenlaan 200F, P.O. Box 2404, B-3001 Heverlee, Belgium
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Datta S, Bhattacharya S. Differential response of cholesterol based pyrimidine systems with oxyethylene type spacers to gelation and mesogen formation in the presence of alkali metal ions. SOFT MATTER 2015; 11:1945-1953. [PMID: 25619339 DOI: 10.1039/c4sm02792b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A new series of lipophilic cholesteryl derivatives of 2,4,6-trichloro-pyrimidine-5-carbaldehyde has been synthesized. Oxyethylene spacers of variable lengths were inserted between the hydrogen bonding promoting pyrimidine core and the cholesteryl tail in order to understand their effect on the self-assembly of these compounds. Only compound 1a with the shortest spacer formed a gel in organic solvents such as n-butanol and n-dodecane. While other members (1b and c) having longer spacers led to sol formation and precipitation in n-butanol and n-dodecane respectively. The self-assembly phenomena associated with the gelation process were investigated using temperature-dependent UV-Vis and CD-spectroscopy. The morphological features of the freeze-dried gels obtained from different organic solvents were examined by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The solid phase behaviours of these molecules and their associated alkali metal ion complexes were explored using polarized optical microscopy (POM) and differential scanning calorimetry (DSC). The molecular arrangements in the xerogel and in the solid state were further probed using a wide-angle X-ray diffraction (WAXD) technique. Analysis of the wide-angle X-ray diffraction data reveals that this class of molecules adopts a hexagonal columnar organization in the gel and in the solid state. Each slice of these hexagonal columnar structures is composed of a dimeric molecular-assembly as a building block. Significant changes in the conformation of the oxyethylene chains could be triggered via the coordination of selected alkali metal ions. This led to the production of interesting metal ion promoted mesogenic behaviour.
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Affiliation(s)
- Sougata Datta
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India.
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7
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Sivadas AP, Kumar NSS, Prabhu DD, Varghese S, Prasad SK, Rao DSS, Das S. Supergelation via Purely Aromatic π–π Driven Self-Assembly of Pseudodiscotic Oxadiazole Mesogens. J Am Chem Soc 2014; 136:5416-23. [DOI: 10.1021/ja500607d] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Aneesh P. Sivadas
- Photosciences
and Photonics Section, Chemical Sciences and Technology Division,
National Institute for Interdisciplinary Science and Technology (NIIST)
and Network of Institutes for Solar Energy, Council of Scientific and Industrial Research (CSIR), Trivandrum 695 019 India
| | - N. S. Saleesh Kumar
- Photosciences
and Photonics Section, Chemical Sciences and Technology Division,
National Institute for Interdisciplinary Science and Technology (NIIST)
and Network of Institutes for Solar Energy, Council of Scientific and Industrial Research (CSIR), Trivandrum 695 019 India
| | - Deepak D. Prabhu
- Photosciences
and Photonics Section, Chemical Sciences and Technology Division,
National Institute for Interdisciplinary Science and Technology (NIIST)
and Network of Institutes for Solar Energy, Council of Scientific and Industrial Research (CSIR), Trivandrum 695 019 India
| | - Shinto Varghese
- Photosciences
and Photonics Section, Chemical Sciences and Technology Division,
National Institute for Interdisciplinary Science and Technology (NIIST)
and Network of Institutes for Solar Energy, Council of Scientific and Industrial Research (CSIR), Trivandrum 695 019 India
| | | | | | - Suresh Das
- Photosciences
and Photonics Section, Chemical Sciences and Technology Division,
National Institute for Interdisciplinary Science and Technology (NIIST)
and Network of Institutes for Solar Energy, Council of Scientific and Industrial Research (CSIR), Trivandrum 695 019 India
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8
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James SJ, Perrin A, Jones CD, Yufit DS, Steed JW. Highly interlocked anion-bridged supramolecular networks from interrupted imidazole–urea gels. Chem Commun (Camb) 2014; 50:12851-4. [DOI: 10.1039/c4cc05789a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogels from a combination of imidazole and urea hydrogen bonding interactions are turned off by metal complexation and anion binding.
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Affiliation(s)
| | - Andrea Perrin
- Department of Chemistry
- Durham University
- Durham DH1 3LE, UK
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9
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Isoda K, Abe T, Tadokoro M. Room-Temperature Redox-Active Liquid Crystals Composed of Tetraazanaphthacene Derivatives. Chem Asian J 2013; 8:2951-4. [DOI: 10.1002/asia.201300780] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Indexed: 11/07/2022]
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10
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Rohini R, Lee C, Lu J, Lin IJB. Symmetrical 1,3‐Dialkylimidazolium Based Ionic Liquid Crystals. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201200598] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rondla Rohini
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
| | - Ching‐Kuan Lee
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
| | - Jung‐Tang Lu
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
| | - Ivan J. B. Lin
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
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11
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Pati D, Kalva N, Das S, Kumaraswamy G, Sen Gupta S, Ambade AV. Multiple Topologies from Glycopolypeptide–Dendron Conjugate Self-Assembly: Nanorods, Micelles, and Organogels. J Am Chem Soc 2012; 134:7796-802. [DOI: 10.1021/ja300065f] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Debasis Pati
- CReST
Chemical Engineering Division and ‡Polymer Science and Engineering Division, National Chemical Laboratory, Pune 411008,
India
| | - Nagendra Kalva
- CReST
Chemical Engineering Division and ‡Polymer Science and Engineering Division, National Chemical Laboratory, Pune 411008,
India
| | - Soumen Das
- CReST
Chemical Engineering Division and ‡Polymer Science and Engineering Division, National Chemical Laboratory, Pune 411008,
India
| | - Guruswamy Kumaraswamy
- CReST
Chemical Engineering Division and ‡Polymer Science and Engineering Division, National Chemical Laboratory, Pune 411008,
India
| | - Sayam Sen Gupta
- CReST
Chemical Engineering Division and ‡Polymer Science and Engineering Division, National Chemical Laboratory, Pune 411008,
India
| | - Ashootosh V. Ambade
- CReST
Chemical Engineering Division and ‡Polymer Science and Engineering Division, National Chemical Laboratory, Pune 411008,
India
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12
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Rajamalli P, Prasad E. Low Molecular Weight Fluorescent Organogel for Fluoride Ion Detection. Org Lett 2011; 13:3714-7. [DOI: 10.1021/ol201325j] [Citation(s) in RCA: 154] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- P. Rajamalli
- Department of Chemistry, Indian Institute of Technology Madras (IITM), Chennai 600 036, India
| | - Edamana Prasad
- Department of Chemistry, Indian Institute of Technology Madras (IITM), Chennai 600 036, India
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13
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Nandi S, Altenbach HJ, Jakob B, Lange K, Ihizane R, Schneider MP. A Novel Class of Organo- (Hydro-) Gelators Based on Ascorbic Acid. Org Lett 2011; 13:1980-3. [DOI: 10.1021/ol2003622] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sukhendu Nandi
- FB C - Organische Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, Germany
| | - Hans-Josef Altenbach
- FB C - Organische Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, Germany
| | - Bernd Jakob
- FB C - Organische Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, Germany
| | - Karsten Lange
- FB C - Organische Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, Germany
| | - Rachid Ihizane
- FB C - Organische Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, Germany
| | - Manfred P. Schneider
- FB C - Organische Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, Germany
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14
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de Hatten X, Bell N, Yufa N, Christmann G, Nitschke JR. A dynamic covalent, luminescent metallopolymer that undergoes sol-to-gel transition on temperature rise. J Am Chem Soc 2011; 133:3158-64. [PMID: 21322646 DOI: 10.1021/ja110575s] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The condensation of linear diamine and dialdehyde subcomponents around copper(I) templates in the presence of bulky trioctylphosphine ancillary ligands gave a linear, conjugated polymeric material in DMSO solution. This polymer solution was observed to undergo sol-to-gel transition as the temperature was raised to 140 °C, in contrast with the behavior of most gel-forming polymers, which do so upon cooling. We attribute the sol-to-gel transition to the formation of Cu(I)N(4) cross-links as the equilibria 2[Cu(I)N(2)P(2)] ⇄ [Cu(I)N(4)] + [CuP(n)](+) + (4 - n)P favor the right-hand side at higher temperatures. The material was also observed to exhibit thermochromism and photoluminescence, with the color and intensity of both absorption and emission exhibiting temperature dependence. This material thus responds predictably to combinations of stimuli (heat, light, mechanical shear) in an interconnected way, as is required to generate complex function.
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Affiliation(s)
- Xavier de Hatten
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
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15
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Dispersion of single walled carbon nanotubes in organogels by incorporation into organogel fibers. J Colloid Interface Sci 2010; 352:121-7. [DOI: 10.1016/j.jcis.2010.08.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Revised: 08/06/2010] [Accepted: 08/07/2010] [Indexed: 11/21/2022]
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16
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Cheng X, Bai X, Jing S, Ebert H, Prehm M, Tschierske C. Self-Assembly of Imidazolium-Based Rodlike Ionic Liquid Crystals: Transition from Lamellar to Micellar Organization. Chemistry 2010; 16:4588-601. [DOI: 10.1002/chem.200903210] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2009] [Indexed: 11/11/2022]
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