1
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Behera PK, Chen FR, Gautam P, Roy M, Rao DSS, Yelamaggad CV, Jou JH, Sudhakar AA. Tuning the Liquid Crystallinity and Electroluminescence via Sulfonation of S-Annulated Perylene Tetraester. Chemistry 2024; 30:e202304333. [PMID: 38373190 DOI: 10.1002/chem.202304333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 02/15/2024] [Accepted: 02/16/2024] [Indexed: 02/21/2024]
Abstract
This study presents a comparative analysis of S-annulated perylene tetraester (PTE-S) and its sulfone (PTE-SO2) analogue. This sulfone modification reduced melting point and stabilized a room temperature columnar rectangular (Colr) phase in contrast to its parent PTE-S which showed a crystalline behaviour at room temperature. This molecular design also leads to red-shifted absorbance and emission in comparison to PTE-S, along with a tuning of photoluminescence from sky blue to green, achieving an impressive quantum yield of 85 %. OLED devices fabricated using PTE-SO2 as emitter material at concentrations of 0.2, 0.5, and 1 wt.% in CBP as host material. A maximum external quantum efficiency (EQE) of 2.9 % was observed with the 0.5 wt.% PTE-SO2 in CBP with CIE coordinates of (0.45, 0.35), accompanied by an orange luminance of 848 cd/m2. Notably, a device with a 0.5 wt% doping concentration of PTE-S demonstrates an EQE of 3.5 %, and cyan luminance of 2,598 cd/m2.
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Affiliation(s)
- Paresh Kumar Behera
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Feng-Rong Chen
- Department of Materials Science and Engineering National Tsing Hua University 101, Sec. 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
| | - Prakalp Gautam
- Department of Materials Science and Engineering National Tsing Hua University 101, Sec. 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
| | - Mrinmoy Roy
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | | | - Channabasaveshwar V Yelamaggad
- Centre for Nano and Soft Matter Sciences, Arkavathi Campus, Survey No.7, Shivanapura, Dasanapura Hobli, Bengaluru, 562162, India
- Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
- SJB Institute of Technology, BGS Health & Education City, Dr. Vishnuvardhan Road, Kengeri, Bengaluru, 560060, Karnataka, India
| | - Jwo-Huei Jou
- Department of Materials Science and Engineering National Tsing Hua University 101, Sec. 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
| | - Achalkumar Ammathnadu Sudhakar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
- Centre for Sustainable Polymers, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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2
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Aromatic stacking and the self-assembly of perylene monoimide diester homodimers. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Borissov A, Maurya YK, Moshniaha L, Wong WS, Żyła-Karwowska M, Stępień M. Recent Advances in Heterocyclic Nanographenes and Other Polycyclic Heteroaromatic Compounds. Chem Rev 2022; 122:565-788. [PMID: 34850633 PMCID: PMC8759089 DOI: 10.1021/acs.chemrev.1c00449] [Citation(s) in RCA: 247] [Impact Index Per Article: 123.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Indexed: 12/21/2022]
Abstract
This review surveys recent progress in the chemistry of polycyclic heteroaromatic molecules with a focus on structural diversity and synthetic methodology. The article covers literature published during the period of 2016-2020, providing an update to our first review of this topic (Chem. Rev. 2017, 117 (4), 3479-3716).
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Affiliation(s)
| | | | | | | | | | - Marcin Stępień
- Wydział Chemii, Uniwersytet
Wrocławski, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
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4
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Eichhorn SH, El-Ballouli AO, Cassar A, Kaafarani BR. Columnar Mesomorphism of Board-Shaped Perylene, Diketopyrrolopyrrole, Isoindigo, Indigo, and Quinoxalino-Phenanthrophenazine Dyes. Chempluschem 2021; 86:319-339. [PMID: 33624951 DOI: 10.1002/cplu.202100024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/11/2021] [Indexed: 12/12/2022]
Abstract
The properties of organic dyes depend as much on their intermolecular interactions as on their molecular structure. While it is generally predictable what supramolecular structure would be ideal for a specific application, the generation of specific supramolecular structures by molecular design and suitable processing methods remains to be a challenge. A versatile approach to different supramolecular structures has been the application of mesomorphism in conjunction with alignment techniques and self-assembly at interfaces. Reviewed here is the columnar mesomorphism of board-shaped dyes perylene, indigo, isoindigo, diketopyrrolopyrrole, and quinoxalinophenanthrophenazine. They generate a larger number of different supramolecular structures than conventional disc-shaped (discotic) mesogens because of their non-circular shape and directional intermolecular interactions. The mesomorphism of all but the perylene derivatives is systematically and comprehensively covered for the first time.
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Affiliation(s)
- S Holger Eichhorn
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Ave, Windsor, ON, N9B 3P4, Canada
| | - A O El-Ballouli
- College of Science and Health Professions, King Saud bin Abdulaziz University for Health Sciences, Riyadh, 11481, Kingdom of Saudi Arabia.,King Abdullah International Medical Research Center, Riyadh, 11426, Kingdom of Saudi Arabia
| | - Adam Cassar
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Ave, Windsor, ON, N9B 3P4, Canada
| | - Bilal R Kaafarani
- Department of Chemistry, American University of Beirut, Beirut, 1107-2020, Lebanon
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5
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Globular Aggregates Stemming from the Self-Assembly of an Amphiphilic N-Annulated Perylene Bisimide in Aqueous Media. NANOMATERIALS 2021; 11:nano11061457. [PMID: 34072824 PMCID: PMC8228590 DOI: 10.3390/nano11061457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/19/2021] [Accepted: 05/27/2021] [Indexed: 11/26/2022]
Abstract
Herein, we describe the synthesis of highly emissive amphiphilic N-annulated PBI 1 decorated with oligo ethylene glycol (OEG) side chains. These polar side chains allow the straightforward solubility of 1 in solvents of different polarity such as water, iPrOH, dioxane, or chloroform. Compound 1 self-assembles in aqueous media by π-stacking of the aromatic units and van der Waals interactions, favored by the hydrophobic effect. The hypo- and hypsochromic effect observed in the UV-Vis spectra of 1 in water in comparison to chloroform is diagnostic of H-type aggregation. Solvent denaturation experiments allow deriving the free Gibbs energy for the self-assembly process in aqueous media and the factor m that is indicative of the influence exerted by a good solvent in the stability of the final aggregates. The ability of compound 1 to self-assemble in water yields globular aggregates that have been visualized by TEM imaging.
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6
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Saito A, Yamamoto S, Ochi R, Inoue K, Hadano S, Watanabe S, Nakayama T, Niko Y. An Azide-Tethered Cremophor® ELP Surfactant Allowing Facile Post-Surface Functionalization of Nanoemulsions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200014] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Airi Saito
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1 Akebono-cho, Kochi 780-8520, Japan
| | - Shinkuro Yamamoto
- Center for Photodynamic Medicine Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku, Kochi 783-8505, Japan
| | - Rika Ochi
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1 Akebono-cho, Kochi 780-8520, Japan
| | - Keiji Inoue
- Center for Photodynamic Medicine Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku, Kochi 783-8505, Japan
| | - Shingo Hadano
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1 Akebono-cho, Kochi 780-8520, Japan
| | - Shigeru Watanabe
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1 Akebono-cho, Kochi 780-8520, Japan
| | - Taku Nakayama
- Center for Photodynamic Medicine Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku, Kochi 783-8505, Japan
| | - Yosuke Niko
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1 Akebono-cho, Kochi 780-8520, Japan
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7
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8
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Gupta RK, Sudhakar AA. Perylene-Based Liquid Crystals as Materials for Organic Electronics Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:2455-2479. [PMID: 29929366 DOI: 10.1021/acs.langmuir.8b01081] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Columnar phases formed by the stacking of disclike molecules with an intimate π-π overlap forms a 1D pathway for the anisotropic charge migration along the columns. Columnar phases have great potential in organic electronic devices to be utilized as active semiconducting layers in comparison to organic single crystals or amorphous polymers in terms of processability, ease of handling, and high charge carrier mobility. Intelligent molecular engineering of perylene and its derivatives provided access to tune the physical properties and self-assembly behavior. The columnar phase formed by perylene derivatives has great potential in the fabrication of organic electronic devices. There are several positions on the perylene molecule, which can be functionalized to tune its self-assembly, as well as optoelectronic properties. Thus, many liquid-crystalline molecules stabilizing the columnar phase, which are based on perylene tetraesters, perylene diester imides, and perylene bisimides, have been synthesized over the years. Their longitudinal and laterally extended derivatives, bay-substituted derivatives exhibiting a columnar phase, are reported. In addition, several liquid-crystalline oligomers and polymers based on perylene derivatives were also reported. All such modifications provide an option to tune the energy levels of frontier molecular orbitals with respect to the work function of the electrodes in devices and also the processability of such materials. In this feature article, we attempt to provide an overview of the molecular design developed to tune the applicable properties and self-assembly of perylene derivatives as well as recent developments related to their application in the fabrication of organic solar cells, organic light-emitting diodes, and organic field-effect transistors.
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Affiliation(s)
- Ravindra Kumar Gupta
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , Assam , India
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9
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Sharma VS, Shah AP, Sharma AS. A new class of supramolecular liquid crystals derived from azo calix[4]arene functionalized 1,3,4-thiadiazole derivatives. NEW J CHEM 2019. [DOI: 10.1039/c8nj04997a] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new class of bowl-shaped supramolecular liquid crystals (LCs) is described derived from calix[4]arene substituted with 1,3,4-thiadiazole derivatives, inbuilt with Schiff base and ester on the lower rim and with an azo group on the upper rim with an alkyl side chain (–OC3H7, –OC8H17).
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Affiliation(s)
- Vinay S. Sharma
- Department of Chemistry
- Faculty of Basic and Applied Science
- Madhav University
- Sirohi
- India
| | | | - Anuj S. Sharma
- Department of Chemistry
- School of Science
- Gujarat University
- Ahmedabad
- India
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10
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Nişancı B, Daştan A, Bozdemir ÖA. Aromatic stacking of a perylenetetracarboxylic tetraester: Self-assembly in both water and chloroform. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.08.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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11
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Highly lipophilic and solid emissive N-annulated perylene bisimide synthesis for facile preparation of bright and far-red excimer fluorescent nano-emulsions with large Stokes shift. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.05.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Gupta RK, Achalkumar AS. Microwave-Assisted Method for the Synthesis of Perylene Ester Imides as a Gateway Toward Unsymmetrical Perylene Bisimides. J Org Chem 2018; 83:6290-6300. [DOI: 10.1021/acs.joc.8b00161] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Ravindra Kumar Gupta
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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13
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Gupta RK, Ulla H, Satyanarayan MN, Sudhakar AA. A Perylene-Triazine-Based Star-Shaped Green Light Emitter for Organic Light Emitting Diodes. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800161] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ravindra Kumar Gupta
- Department of Chemistry; Indian Institute of Technology Guwahati; 781039 Guwahati India
| | - Hidayath Ulla
- Department of Chemistry; Indian Institute of Technology Guwahati; 781039 Guwahati India
| | - M. N. Satyanarayan
- Department of Physics; National Institute of Technology Karnataka; NH66 575025 Srinivas Nagar, Surathkal Mangaluru India
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14
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Gupta RK, Shankar Rao DS, Prasad SK, Achalkumar AS. Columnar Self-Assembly of Electron-Deficient Dendronized Bay-Annulated Perylene Bisimides. Chemistry 2018; 24:3566-3575. [PMID: 29283196 DOI: 10.1002/chem.201705290] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Indexed: 11/08/2022]
Abstract
Three new heteroatom bay-annulated perylene bisimides (PBIs) have been synthesized by microwave-assisted synthesis in excellent yield. N-annulated and S-annulated perylene bisimides exhibited columnar hexagonal phase, whereas Se-annulated perylene bisimide exhibited low temperature columnar oblique phase in addition to the high temperature columnar hexagonal phase. The cup shaped bay-annulated PBIs pack into columns with enhanced intermolecular interactions. In comparison to PBI, these molecules exhibited lower melting and clearing temperature, with good solubility. A small red shift in the absorption was seen in the case of N-annulated PBI, whereas S- and Se-annulated PBIs exhibited blue-shifted absorption spectra. Bay-annulation increased the HOMO and LUMO levels of the N-annulated perylene bisimide, whereas a slight increase in the LUMO level and a decrease in the HOMO levels were observed in the case of S- and Se-annulated perylene bisimides, in comparison to the simple perylene bisimide. The band gaps of PBI and PBI-N were almost same, whereas an increase in the band gaps were observed in the case of S- and Se-annulated PBIs. The tendency to freeze in the ordered glassy columnar phase for PBI-N and PBI-S will help to overcome the charge traps due to crystallization, which are detrimental to one-dimensional charge carrier mobility. These solution processable electron deficient columnar semiconductors possessing good thermal stability may form an easily accessible promising class of n-type materials.
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Affiliation(s)
- Ravindra Kumar Gupta
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Doddamane S Shankar Rao
- Centre for Nano and Soft Matter Sciences, Jalahalli, P. B. No. 1329, Bangalore, 560013, India
| | - S Krishna Prasad
- Centre for Nano and Soft Matter Sciences, Jalahalli, P. B. No. 1329, Bangalore, 560013, India
| | - Ammathnadu S Achalkumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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15
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Dubey R, Yerrasani R, Karunakar M, Singh AK, Kumar S, Rao T. Synthesis, structural and mesophase characterization of isoindoline-1,3-dione based mesogenic Schiff bases. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Vinayakumara DR, Swamynathan K, Kumar S, Adhikari AV. Optoelectronic exploration of novel non-symmetrical star-shaped discotic liquid crystals based on cyanopyridine. NEW J CHEM 2018. [DOI: 10.1039/c8nj02582g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel unsymmetrical star-shaped cyanopyridines were shown to possess an ordered hexagonal columnar assembly at room temperature. Their inherent intramolecular charge transport properties cause a technologically important intense blue light emission in the aggregated state.
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Affiliation(s)
- D. R. Vinayakumara
- Organic Materials Laboratory
- Department of Chemistry
- National Institute of Technology Karnataka
- Surathkal
- India
| | - K. Swamynathan
- SCM Group
- Raman Research Institute
- Bangalore – 560 080
- India
| | - Sandeep Kumar
- SCM Group
- Raman Research Institute
- Bangalore – 560 080
- India
| | - Airody Vasudeva Adhikari
- Organic Materials Laboratory
- Department of Chemistry
- National Institute of Technology Karnataka
- Surathkal
- India
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17
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Zhu M, Chen Y, Guo H, Yang F, Song X. Perylene liquid crystals with multiple alkyl chains: investigation of the influence of peripheral alkyl chain number on mesomorphic and photophysical properties. NEW J CHEM 2018. [DOI: 10.1039/c8nj00480c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Novel perylene liquid crystals with 2, 4 and 6 peripheral alkyl chains or 6, 8 and 10 peripheral alkyl chains at both the imide and bay-positions were investigated.
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Affiliation(s)
- Mingguang Zhu
- College of Chemistry and Materials Science
- Fujian Normal University
- Fuzhou 350007
- P. R. China
| | - Yongzhu Chen
- College of Chemistry and Materials Science
- Fujian Normal University
- Fuzhou 350007
- P. R. China
| | - Hongyu Guo
- College of Chemistry and Materials Science
- Fujian Normal University
- Fuzhou 350007
- P. R. China
| | - Fafu Yang
- College of Chemistry and Materials Science
- Fujian Normal University
- Fuzhou 350007
- P. R. China
- Fujian Key Laboratory of Polymer Materials
| | - Xuchun Song
- College of Chemistry and Materials Science
- Fujian Normal University
- Fuzhou 350007
- P. R. China
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18
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Xiao Y, Gao H, Wang T, Zhang R, Cheng X. Synthesis, liquid-crystalline, photophysical and chemosensor properties of oxadiazole/thiadiazole-based amphiphiles with glycerol groups. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.110] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Bala I, Gupta SP, De J, Pal SK. Room-Temperature Columnar Nematic and Soft Crystalline Columnar Assemblies of a New Series of Perylene-Centred Disc Tetramers. Chemistry 2017; 23:12767-12778. [DOI: 10.1002/chem.201702181] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Indu Bala
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali; Sector-81, Knowledge City Manauli 140306 India
| | - Santosh Prasad Gupta
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali; Sector-81, Knowledge City Manauli 140306 India
| | - Joydip De
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali; Sector-81, Knowledge City Manauli 140306 India
| | - Santanu Kumar Pal
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali; Sector-81, Knowledge City Manauli 140306 India
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20
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Díaz E, Elgueta E, Sanchez SA, Barberá J, Vergara J, Parra M, Dahrouch M. Hybrid photoluminescent materials containing a benzobisthiazole core for liquid crystal and gel applications. SOFT MATTER 2017; 13:1804-1815. [PMID: 28169382 DOI: 10.1039/c6sm02650h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Tetra- and hexacatenar amide compounds containing a linear centrosymmetric benzobisthiazole core were synthesized with good yields. These compounds were characterized and their structures confirmed by elemental analysis, and FT-IR, Maldi mass and NMR spectroscopy. All compounds exhibited excellent thermal stability up to 330 °C. The tetracatenar series containing a double substitution in the meta positions did not show mesomorphic behaviour, whereas the hexacatenar and tetracatenar series having a double substitution in the meta and para positions showed liquid crystal properties with optical textures typical of columnar mesophases corroborated by POM analysis. The mesomorphic properties were dependent on the length, number and position of alkoxy chains attached at the end of the rigid core. XRD studies of the hexacatenar series showed the hexagonal columnar structure of the mesophases. Photoluminescence properties in solution were observed in the visible region, with good quantum yields. In the solid state, these compounds behave as blue emitters and they are able to change colour with acid or base addition. The hexacatenar benzobisthiazole compound with an alkoxy chain of 14 carbons presented properties of a supergelator in chloroform, leading to the formation of a fluorescent organogel material with fluorescence emission in the blue region.
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Affiliation(s)
- E Díaz
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.
| | - E Elgueta
- Centro de Investigación de Polímeros Avanzados (CIPA), Universidad de Concepción, Casilla 160-C, Concepción, Chile
| | - S A Sanchez
- Departamento de Polímeros, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile
| | - J Barberá
- Departamento de Química Orgánica, Facultad de Ciencias-Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C, 50009 Zaragoza, Spain
| | - J Vergara
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.
| | - M Parra
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.
| | - M Dahrouch
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile.
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21
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Ozdemir R, Choi D, Ozdemir M, Kim H, Kostakoğlu ST, Erkartal M, Kim H, Kim C, Usta H. A Solution-Processable Liquid-Crystalline Semiconductor for Low-Temperature-Annealed Air-Stable N-Channel Field-Effect Transistors. Chemphyschem 2017; 18:850-861. [DOI: 10.1002/cphc.201601430] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Resul Ozdemir
- Department of Materials Science and Nanotechnology Engineering; Abdullah Gül University; Kayseri 38080 Turkey
| | - Donghee Choi
- Department of Chemical and Biomolecular Engineering; Sogang University, Mapo-gu; Seoul 04107 Korea
| | - Mehmet Ozdemir
- Department of Materials Science and Nanotechnology Engineering; Abdullah Gül University; Kayseri 38080 Turkey
| | - Hyekyoung Kim
- Department of Chemical and Biomolecular Engineering; Sogang University, Mapo-gu; Seoul 04107 Korea
| | | | - Mustafa Erkartal
- Department of Materials Science and Nanotechnology Engineering; Abdullah Gül University; Kayseri 38080 Turkey
| | - Hyungsug Kim
- Department of Chemical and Biomolecular Engineering; Sogang University, Mapo-gu; Seoul 04107 Korea
| | - Choongik Kim
- Department of Chemical and Biomolecular Engineering; Sogang University, Mapo-gu; Seoul 04107 Korea
| | - Hakan Usta
- Department of Materials Science and Nanotechnology Engineering; Abdullah Gül University; Kayseri 38080 Turkey
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22
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Zhao H, He Z, Xu M, Liang C, Kumar S. Electron transporting organic materials with an exceptional large scale homeotropic molecular orientation. Phys Chem Chem Phys 2016; 18:8554-60. [PMID: 26949167 DOI: 10.1039/c6cp00031b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An electron transporting anthraquinone derivative demonstrated a stable large-scale homeotropic alignment on an open substrate surface, which substantially improved its charge carrier mobility. The electron mobility (μ(E)) increased by two orders of magnitude from 3.2 × 10(-4) cm(2) V(-1) s(-1) for the film without alignment to 1.2 × 10(-2) cm(2) V(-1) s(-1) for the homeotropically aligned film. A distinct enhancement in the UV absorption spectra of the films around the short wavelength range was observed to be associated with the molecular alignments. These alignments are less sensitive to the substrate under test. The anchoring force of the columnar stacks appears to be related to the nature of the material associated with the strong interaction between the molecules and substrate interface.
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Affiliation(s)
- Huan Zhao
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, P. R. China.
| | - Zhiqun He
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, P. R. China.
| | - Min Xu
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, P. R. China.
| | - Chunjun Liang
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, P. R. China.
| | - Sandeep Kumar
- Raman Research Institute, C.V. Raman Avenue, Bangalore 560 080, India
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A DFT study on reactivity, aromaticity and absorption spectra of perylo[1,12-b,c,d] thiophene tetraester doped with B, N, O, Se and BN. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.03.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Gupta RK, Pathak SK, Pradhan B, Gupta M, Pal SK, Sudhakar AA. Bay-Annulated Perylene Tetraesters: A New Class of Discotic Liquid Crystals. Chemphyschem 2016; 17:859-72. [PMID: 26748430 DOI: 10.1002/cphc.201501028] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Indexed: 11/11/2022]
Abstract
Selenium-annulated perylene tetraesters that stabilize the hexagonal columnar phase have been synthesized and characterized, and their thermal and photophysical behavior has been determined. The mesophase range decreased with an increase in chain length. A comparative account of the structure-property relationships of this series of compounds with respect to parent perylene tetraesters, N- and S-annulated perylene tetraesters, in terms of their thermal, photophysical and electrochemical behavior is provided. The bay-annulation of perylene tetraesters is a good option to modify the thermal and photophysical properties of perylene derivatives and it can provide a new avenue for the synthesis of several technologically important self-assembling perylene derivatives.
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Affiliation(s)
- Ravindra Kumar Gupta
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Guwahati, Assam, India
| | - Suraj Kumar Pathak
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Guwahati, Assam, India
| | - Balaram Pradhan
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Guwahati, Assam, India
| | - Monika Gupta
- Deparment of Chemical Sciences, Sector-81, Indian Institute of Science Education and Research, Mohali, 140306, Knowledge City, Manauli, Punjab, India
| | - Santanu Kumar Pal
- Deparment of Chemical Sciences, Sector-81, Indian Institute of Science Education and Research, Mohali, 140306, Knowledge City, Manauli, Punjab, India
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25
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Gupta RK, Pradhan B, Pathak SK, Gupta M, Pal SK, Sudhakar AA. Perylo[1,12-b,c,d] Thiophene Tetraesters: A New Class of Luminescent Columnar Liquid Crystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:8092-8100. [PMID: 26077109 DOI: 10.1021/acs.langmuir.5b01187] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Perylo[1,12-b,c,d] thiophene tetraesters exhibiting wide-range hexagonal columnar phase have been synthesized. These compounds also exhibit good homeotropic alignment in the liquid-crystalline phase which is very important for the device fabrication. These compounds showed sky-blue luminescence in solution under the long-wavelength UV light. With high solubility and high quantum yield these compounds can serve as standards to measure quantum yields of unknown samples. This new class of materials is promising, considering the emissive nature and stabilization of hexagonal columnar mesophase over a wide thermal range and ease of synthesis.
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Affiliation(s)
- Ravindra Kumar Gupta
- †Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Balaram Pradhan
- †Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Suraj Kumar Pathak
- †Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Monika Gupta
- ‡Indian Institute of Science Education and Research, Mohali, Sector-81, Knowledge City, Manauli 140306, Punjab, India
| | - Santanu Kumar Pal
- ‡Indian Institute of Science Education and Research, Mohali, Sector-81, Knowledge City, Manauli 140306, Punjab, India
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