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De R, Sharma S, Sengupta S, Kumar Pal S. Discs to a 'Bright' Future: Exploring Discotic Liquid Crystals in Organic Light Emitting Diodes in the Era of New-Age Smart Materials. CHEM REC 2022; 22:e202200056. [PMID: 35594033 DOI: 10.1002/tcr.202200056] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/29/2022] [Indexed: 11/09/2022]
Abstract
With the advent of a new decade and the paradigm shift of every sphere of urban life to virtual platforms, it has become imperative for the global researcher community to channelize efforts into upgradation of the existing display-technology. In this context, discotic liquid crystals (DLCs) are a class of self-assembling organic materials that are recently being explored in fabricating the emissive layers of organic light emitting diodes (OLEDs). With their unique inherent structural and functional properties, they have the potential to challenge the currently prevailing OLED-emitters. Yet the applications of this promising class of materials in OLEDs have not been comprehensively reviewed in literature till now. In this account, we present an overview of the developments in the field of luminescent DLC-based emitters, supported by their associated photophysical phenomena and their performance parameters as emitters in fabricated OLED devices.
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Affiliation(s)
- Ritobrata De
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), 140306, Mohali, Punjab, India
| | - Sushil Sharma
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), 140306, Mohali, Punjab, India
| | - Sanchita Sengupta
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), 140306, Mohali, Punjab, India
| | - Santanu Kumar Pal
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), 140306, Mohali, Punjab, India
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Mahalingavelar P, Kanvah S. α-Cyanostilbene: A Multifunctional Spectral Engineering Motif. Phys Chem Chem Phys 2022; 24:23049-23075. [DOI: 10.1039/d2cp02686d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The remarkable photophysical phenomenon of aggregation-induced emission offers excellent strategies to obtain the molecular materials possessing unique spectral signatures such as high fluorescence intensity, excellent quantum yield, large Stokes shift...
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Bardasov IN, Alekseeva AU, Ershova AI, Ershov OV. An approach to the synthesis of α-cyanostilbazole derivatives based on the heterocyclization of tetracyanopropenides. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Niknam E, Mahmoodi A, Panahi F, Heydari Dokoohaki M, Zolghadr AR, Khalafi-Nezhad A. Synthesis of some new distyrylbenzene derivatives using immobilized Pd on an NHC-functionalized MIL-101(Cr) catalyst: photophysical property evaluation, DFT and TD-DFT calculations. RSC Adv 2021; 11:12374-12380. [PMID: 35423731 PMCID: PMC8696979 DOI: 10.1039/d1ra00457c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 03/22/2021] [Indexed: 12/20/2022] Open
Abstract
In this study the catalytic application of a heterogeneous Pd-catalyst system based on metal organic framework [Pd-NHC-MIL-101(Cr)] was investigated in the synthesis of distyrylbenzene derivatives using the Heck reaction. The Pd-NHC-MIL-101(Cr) catalyst showed high efficiency in the synthesis of these π-conjugated materials and products were obtained in high yields with low Pd-contamination based on ICP analysis. The photophysical behaviors for some of the synthesized distyrylbenzene derivatives were evaluated. The DFT and TD-DFT methods were employed to determine the optimized molecular geometry, band gap energy, and the electronic absorption and emission wavelengths of the new synthesized donor-π-acceptor (D-π-A) molecules in the gas phase and in various solvents using the chemical model B3LYP/6-31+G(d,p) level of theory.
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Affiliation(s)
- Esmaeil Niknam
- Department of Chemistry, College of Sciences, Shiraz University Shiraz 71454 Iran
| | - Ali Mahmoodi
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology Tehran Iran
| | - Farhad Panahi
- Department of Chemistry, College of Sciences, Shiraz University Shiraz 71454 Iran
| | | | - Amin Reza Zolghadr
- Department of Chemistry, College of Sciences, Shiraz University Shiraz 71454 Iran
| | - Ali Khalafi-Nezhad
- Department of Chemistry, College of Sciences, Shiraz University Shiraz 71454 Iran
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Maeda H, Horikoshi R, Yamaji M, Furuyama T, Segi M. Photophysical Properties of Silyl‐Substituted Stilbene Derivatives. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Hajime Maeda
- Division of Material Chemistry Graduate School of Natural Science and Technology Kanazawa University Kakuma‐machi 920‐1192 Kanazawa Ishikawa Japan
| | - Ryo Horikoshi
- Division of Material Chemistry Graduate School of Natural Science and Technology Kanazawa University Kakuma‐machi 920‐1192 Kanazawa Ishikawa Japan
| | - Minoru Yamaji
- Division of Molecular Science Graduate School of Science and Engineering Gunma University 373‐0057 Ota Gunma Japan
| | - Taniyuki Furuyama
- Division of Material Chemistry Graduate School of Natural Science and Technology Kanazawa University Kakuma‐machi 920‐1192 Kanazawa Ishikawa Japan
- Japan Science and Technology Agency (JST)‐PRESTO 4‐1–8 Honcho, Kawaguchi, Saitama 332‐0012 Kawaguchi Saitama Japan
| | - Masahito Segi
- Division of Material Chemistry Graduate School of Natural Science and Technology Kanazawa University Kakuma‐machi 920‐1192 Kanazawa Ishikawa Japan
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Jana P, Kanvah S. Aggregation-Induced Emission and Organogels with Chiral and Racemic Pyrene-Substituted Cyanostyrenes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2720-2728. [PMID: 32092273 DOI: 10.1021/acs.langmuir.9b03946] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The synthesis, photophysical investigations, and organogel formation of pyrene-phenyl acrylonitriles (1-6) bearing mono-, di-, and trichiral and racemic substitutions were studied. The molecules self-assemble in water and show remarkable emission wavelength and intensity changes associated with distinct color changes. Cryo-scanning electron microscopy (Cryo-SEM) images show the formation of uniform nanoaggregates for the monosubstituted derivatives and network-like structures for di- and trisubstituted derivatives. The favorable π-π stacking ability of the coplanar pyrene ring, steric restrictions due to the cyano group, and beneficial noncovalent interactions from the citronellol moiety allow the molecules to form excellent organogels with fibrous and twisted ribbon morphology for the racemic and chiral derivatives. The organogels based on small molecules could be of high relevance for potential investigations involving soft biological matter.
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Affiliation(s)
- Palash Jana
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Palaj, Gujarat 382355, India
| | - Sriram Kanvah
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Palaj, Gujarat 382355, India
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Xu C, Dong Y, Li W, Zhao R, Dai Y, Zhang C, Song Q. The role of distance between donor and acceptor in configuration stability of Z/E isomers based on cyanostilbene. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.03.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Gopinath A, Manivannan N, Mandal S, Mathivanan N, Nasar AS. Substituent enhanced fluorescence properties of star α-cyanostilbenes and their application in bioimaging. J Mater Chem B 2019; 7:6010-6023. [DOI: 10.1039/c9tb01452g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this paper, we report the fluorescence properties of new star α-cyanostilbene molecules. Fungus cell imaging studies using one of the molecules allowed observing nuclear movement in the live mycelium.
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Affiliation(s)
- A. Gopinath
- Department of Polymer Science
- University of Madras
- Chennai-25
- India
| | - N. Manivannan
- Biocontrol and Microbial Metabolites Lab
- Centre for Advanced Studies in Botany
- University of Madras
- Chennai-600025
- India
| | - Sudip Mandal
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai-600 036
- India
| | - N. Mathivanan
- Biocontrol and Microbial Metabolites Lab
- Centre for Advanced Studies in Botany
- University of Madras
- Chennai-600025
- India
| | - A. Sultan Nasar
- Department of Polymer Science
- University of Madras
- Chennai-25
- India
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Ma Y, Zhang Y, Kong L, Yang J. Rational molecular design: functional quinoline derivatives for PA detection, gaseous acid/base switching and anion-controlled fluorescence. CrystEngComm 2019. [DOI: 10.1039/c8ce01747f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
D-π-A quinoline derivatives were applied in PA detection, gaseous acid/base switching and anions-controlled fluorescence.
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Affiliation(s)
- Yuqing Ma
- College of Chemistry & Chemical Engineering
- Anhui University
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functional Materials
- Hefei 230601
- P. R. China
| | - Yuyang Zhang
- College of Chemistry & Chemical Engineering
- Anhui University
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functional Materials
- Hefei 230601
- P. R. China
| | - Lin Kong
- College of Chemistry & Chemical Engineering
- Anhui University
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functional Materials
- Hefei 230601
- P. R. China
| | - Jiaxiang Yang
- College of Chemistry & Chemical Engineering
- Anhui University
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functional Materials
- Hefei 230601
- P. R. China
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Kumari B, Paramasivam M, Dutta A, Kanvah S. Emission and Color Tuning of Cyanostilbenes and White Light Emission. ACS OMEGA 2018; 3:17376-17385. [PMID: 31458345 PMCID: PMC6643655 DOI: 10.1021/acsomega.8b02775] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 11/30/2018] [Indexed: 06/10/2023]
Abstract
White-light-emitting diodes are energy efficiency replacement of conventional lighting sources. Herein, we report the luminescent behavior of three simple cyanostilbenes with triphenylamine-donating groups bearing different electron-withdrawing groups (phenyl, pyridyl, and p-nitrophenyl) in a common donor (D)-π-acceptor (A) α-cyanostilbene construct along with their thermal and electrochemical properties. The density functional theory (DFT) studies reveal that aggregation-induced emission characteristic feature of the D-π-A dyes is inversely proportional to the intramolecular charge transfer (ICT) effect, that is, phenyl-and pyridyl-substituted compounds show characteristic aggregation-induced emission in water, whereas the ICT effect is dominant for the nitro derivative. The extent of ICT and the solvatochromic emission shifts, from blue to red, depend on the strength of the electron-withdrawing group. White luminescence and tunable emission colors are obtained by careful admixtures of these cyanostilbenes bearing triphenylamines. The results rationalized through DFT and time-dependent DFT calculations follow a consistent trend with the energy levels measured from the electrochemical and optical studies. Thermogravimetric analysis and differential scanning calorimetry studies showed excellent thermal stability of the compounds. The scanning electron microscopy and dynamic light scattering measurements were performed to reveal the formation of aggregates. This strategy involving synthetically simple and structurally similar molecules with different emission properties has potential applications in the fabrication of multicolor and white-light-emitting materials.
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Affiliation(s)
- Beena Kumari
- Department of Chemistry, Indian
Institute of Technology Gandhinagar,
Palaj, Gandhinagar 382
355, India
| | | | - Arnab Dutta
- Department of Chemistry, Indian
Institute of Technology Gandhinagar,
Palaj, Gandhinagar 382
355, India
| | - Sriram Kanvah
- Department of Chemistry, Indian
Institute of Technology Gandhinagar,
Palaj, Gandhinagar 382
355, India
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Fluorescent shape-memory hyperbranched polyurethanes: Synthesis, characterization and evaluation of cytotoxicity. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.09.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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12
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Gopinath A, Sultan Nasar A. Fluorescent star ATRP initiators and fluorescent star poly(methyl methacrylate)s: Synthesis and photophysical properties. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.08.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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