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Bi H, Jiang J, Chen J, Kuang X, Zhang J. Machine Learning Prediction of Quantum Yields and Wavelengths of Aggregation-Induced Emission Molecules. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1664. [PMID: 38612177 PMCID: PMC11012915 DOI: 10.3390/ma17071664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/27/2024] [Accepted: 04/02/2024] [Indexed: 04/14/2024]
Abstract
The aggregation-induced emission (AIE) effect exhibits a significant influence on the development of luminescent materials and has made remarkable progress over the past decades. The advancement of high-performance AIE materials requires fast and accurate predictions of their photophysical properties, which is impeded by the inherent limitations of quantum chemical calculations. In this work, we present an accurate machine learning approach for the fast predictions of quantum yields and wavelengths to screen out AIE molecules. A database of about 563 organic luminescent molecules with quantum yields and wavelengths in the monomeric/aggregated states was established. Individual/combined molecular fingerprints were selected and compared elaborately to attain appropriate molecular descriptors. Different machine learning algorithms combined with favorable molecular fingerprints were further screened to achieve more accurate prediction models. The simulation results indicate that combined molecular fingerprints yield more accurate predictions in the aggregated states, and random forest and gradient boosting regression algorithms show the best predictions in quantum yields and wavelengths, respectively. Given the successful applications of machine learning in quantum yields and wavelengths, it is reasonable to anticipate that machine learning can serve as a complementary strategy to traditional experimental/theoretical methods in the investigation of aggregation-induced luminescent molecules to facilitate the discovery of luminescent materials.
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Affiliation(s)
| | | | | | | | - Jinxiao Zhang
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541006, China; (H.B.)
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2
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Sun H, Chen S, Zhong A, Sun R, Jin J, Yang J, Liu D, Niu J, Lu S. Tuning Photophysical Properties via Positional Isomerization of the Pyridine Ring in Donor-Acceptor-Structured Aggregation-Induced Emission Luminogens Based on Phenylmethylene Pyridineacetonitrile Derivatives. Molecules 2023; 28:molecules28073282. [PMID: 37050045 PMCID: PMC10096500 DOI: 10.3390/molecules28073282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 03/31/2023] [Accepted: 04/03/2023] [Indexed: 04/14/2023] Open
Abstract
A series of aggregation-induced emission (AIE)-featured phenylmethylene pyridineacetonitrile derivatives named o-DBCNPy ((Z)-3-(4-(di-p-tolylamino)phenyl)-2-(pyridin-2-yl)acrylonitrile), m-DBCNPy ((Z)-3-(4-(di-p-tolylamino)phenyl)-2-(pyridin-3-yl)acrylonitrile), and p-DBCNPy ((Z)-3-(4-(di-p-tolylamino)phenyl)-2-(pyridin-4-yl)acrylonitrile) have been synthesized by tuning the substitution position of the pyridine ring. The linkage manner of the pyridine ring had influences on the molecular configuration and conjugation, thus leading to different photophysical properties. The absorption and fluorescence emission peak showed a bathochromic shift when the linking position of the pyridine ring changed from the meta to the ortho and para position. Meanwhile, o-DBCNPy exhibited the highest fluorescence quantum yield of 0.81 and the longest fluorescence lifetime of 7.96 ns as a neat film among all three isomers. Moreover, non-doped organic light-emitting diodes (OLEDs) were assembled in which the molecules acted as the light-emitting layer. Due to the relatively prominent emission properties, the electroluminescence (EL) performance of the o-DBCNPy-based OLED was superior to those of the devices based on the other two isomers with an external quantum efficiency (EQE) of 4.31%. The results indicate that delicate molecular modulation of AIE molecules could endow them with improved photophysical properties, making them potential candidates for organic photoelectronic devices.
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Affiliation(s)
- Haiya Sun
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Shuixin Chen
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Aiguo Zhong
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, China
| | - Rong Sun
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Jiajie Jin
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Jiahao Yang
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Dongzhi Liu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Junfeng Niu
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Shengli Lu
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
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Gouthaman S, Jayaraj A, Sugunalakshmi M, Sivaraman G, P CAS. Supramolecular self-assembly mediated aggregation-induced emission of fluorene-derived cyanostilbenes: multifunctional probes for live cell-imaging. J Mater Chem B 2022; 10:2238-2250. [PMID: 35294959 DOI: 10.1039/d1tb02322e] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first discovery of aggregation-induced emission (AIE), whereby luminogen aggregation plays a positive role in enhancing the light-emission efficiency, has piqued the interest of many researchers as it opens up a new avenue for the exploration of practically beneficial luminescent materials. Diverse AIE-active luminogens (or AIEgens) with tunable emission colours and very high quantum yields (up to unity) in the solid state have been extensively utilised in a broad range of fields including optoelectronics, energy and bioscience. In this article, we describe novel fluorene-based fluorogens that exhibit bright emission in the solid-state, mechanical stimuli-responsive optical properties and aggregation-induced emissive ability, and were able to modulate their donor and acceptor properties. The target compounds were synthesized by a Knoevenagel condensation followed by Suzuki cross-coupling reaction, which tends to result in good yields. The target cyanostilbenes (4a-4d) show different reversibly switched states with high contrast through morphology modulation and demonstrate solvatochromic, vapochromic, and AIE properties. These results strongly suggest that compound 4d has better properties than the other derivatives (4a-c) due to the presence of extended donor-acceptor ability. Moreover, density-functional theory (DFT) calculations strongly support the UV-Vis and fluorescence spectral studies. The formation of nano-flakes and cuboid-shaped nanocrystals was further confirmed by FE-SEM and AFM studies. The synthesized compound 4d displayed very bright emission in the solid state and in the aggregate state as compared with the other derivatives (4a-4c). These results might be due to the presence of high-color contrast, which is an advantage for elucidation and overcomes the challenges exhibited in live-cell imaging applications. Moreover, an MTT assay on live A549 cells incubated with the target compound (4d) showed very low cytotoxicity even at high concentrations.
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Affiliation(s)
- Siddan Gouthaman
- Organic Chemistry Division, CSIR-Central Leather Research Institute (CLRI), Adyar, Chennai-600020, India. .,Department of Cellular Organization and Signaling, National Center for Biological Science-NCBS, Bangalore-560065, India
| | - Anjitha Jayaraj
- Main Group Organometallics Materials, Supramolecular Chemistry and Catalysis Lab, Department of Chemistry, National Institute of Technology, Calicut, 673601, India.
| | - Madurai Sugunalakshmi
- Organic Chemistry Division, CSIR-Central Leather Research Institute (CLRI), Adyar, Chennai-600020, India.
| | - Gandhi Sivaraman
- Department of Chemistry, Gandhigram Rural Institute-Deemed to be University, Gandhigram, 624032, Dindigul, Tamilnadu, India.
| | - Chinna Ayya Swamy P
- Main Group Organometallics Materials, Supramolecular Chemistry and Catalysis Lab, Department of Chemistry, National Institute of Technology, Calicut, 673601, 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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Asressu KH, Chan CK, Wang CC. TMSOTf-catalyzed synthesis of trisubstituted imidazoles using hexamethyldisilazane as a nitrogen source under neat and microwave irradiation conditions. RSC Adv 2021; 11:28061-28071. [PMID: 35480777 PMCID: PMC9039414 DOI: 10.1039/d1ra05802a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 08/12/2021] [Indexed: 12/15/2022] Open
Abstract
In the process of drug discovery and development, an efficient and expedient synthetic method for imidazole-based small molecules from commercially available and cheap starting materials has great significance. Herein, we developed a TMSOTf-catalyzed synthesis of trisubstituted imidazoles through the reaction of 1,2-diketones and aldehydes using hexamethyldisilazane as a nitrogen source under microwave heating and solvent-free conditions. The chemical structures of representative trisubstituted imidazoles were confirmed using X-ray single-crystal diffraction analysis. This synthetic method has several advantages including the involvement of mild Lewis acid, being metal- and additive-free, wide substrate scope with good to excellent yields and short reaction time. Furthermore, we demonstrate the application of the methodology in the synthesis of biologically active imidazole-based drugs. Trisubstituted imidazoles are synthesized efficiently from the readily available 1,2-diketones and aldehydes using hexamethyldisilazane as a new and stable nitrogen source under TMSOTf-catalysis system, microwave heating and solvent-free conditions.![]()
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Affiliation(s)
| | - Chieh-Kai Chan
- Institute of Chemistry, Academia Sinica Taipei 115 Taiwan
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Jana P, Yadav M, Kumar T, Kanvah S. Benzimidazole-acrylonitriles as chemosensors for picric acid detection. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.112874] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Liu B, Wang K, Lu H, Huang M, Shen Z, Yang J. Thermally responsive AIE-active polyurethanes based on a tetraaniline derivative. RSC Adv 2020; 10:41424-41429. [PMID: 35516579 PMCID: PMC9057807 DOI: 10.1039/d0ra06193j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 10/31/2020] [Indexed: 11/21/2022] Open
Abstract
Polyurethanes with different soft–hard segment ratios were successfully synthesized, with an aggregation-induced-emission (AIE)-active tetraaniline derivative (NH2–B3–Ani4–NH2) as the hard segment. The resulting polyurethanes exhibited typical AIE features. The fluorescence intensities of polyurethane films changed with heat treatments. The fluorescence intensities of the polyurethane films decreased sharply after quenching treatment, yet their fluorescence intensities exceeded the original intensities of the films after thermal annealing at 80 °C for 24 h. Differential Scanning Calorimetry (DSC) results implied that the melting peaks in polyurethane films disappeared after quenching treatment, but the melting peaks appeared again after thermal annealing. These results proved that the arrangement of the structure had an important effect on the AIE properties of the polyurethane films. Meanwhile, the fluorescence intensities of these polyurethanes decreased with the increase of temperature, indicating that all three polyurethanes exhibited temperature-dependent fluorescent characteristics. Based on the above investigations, the AIE-active polyurethanes may provide a platform for the development of stimuli-responsive fluorescent materials. Polyurethanes with an AIE fluorophore (tetraaniline derivative) are thermo-responsive, demonstrating that AIE-active polyurethane films have promising applications in stimuli-responsive materials.![]()
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Affiliation(s)
- Beibei Liu
- Beijing Key Laboratory for Powder Technology Research & Development, School of Aeronautical Science and Engineering, Beihang University Beijing 100191 China
| | - Kun Wang
- Key Laboratory of Aerospace Advanced Materials and Performance, Ministry of Education, School of Materials Science and Engineering, Beihang University Beijing 100191 China
| | - Hao Lu
- Key Laboratory of Aerospace Advanced Materials and Performance, Ministry of Education, School of Materials Science and Engineering, Beihang University Beijing 100191 China
| | - Mingming Huang
- Key Laboratory of Aerospace Advanced Materials and Performance, Ministry of Education, School of Materials Science and Engineering, Beihang University Beijing 100191 China
| | - Zhigang Shen
- Beijing Key Laboratory for Powder Technology Research & Development, School of Aeronautical Science and Engineering, Beihang University Beijing 100191 China
| | - Jiping Yang
- Key Laboratory of Aerospace Advanced Materials and Performance, Ministry of Education, School of Materials Science and Engineering, Beihang University Beijing 100191 China
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Dual core clickate fluorophores for selective recognition of Cu2+ and Ni2+ along with live cell imaging. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119655] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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9
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Abstract
The review highlights the recent advances (2018-present) in the regiocontrolled synthesis of substituted imidazoles. These heterocycles are key components to functional molecules that are used in a variety of everyday applications. An emphasis has been placed on the bonds constructed during the formation of the imidazole. The utility of these methodologies based around the functional group compatibility of the process and resultant substitution patterns around the ring are described, including discussion of scope and limitations, reaction mechanisms and future challenges.
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Affiliation(s)
- Dmitrii A Shabalin
- A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St, Irkutsk, 664033, Russian Federation
| | - Jason E Camp
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
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Jana P, Paramasivam M, Khandelwal S, Dutta A, Kanvah S. Perturbing the AIEE activity of pyridine functionalized α-cyanostilbenes with donor substitutions: an experimental and DFT study. NEW J CHEM 2020. [DOI: 10.1039/c9nj03693h] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aggregation propensity of pyridyl functionalized α-cyanostilbenes has been investigated with respect to various amino donors.
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Affiliation(s)
- Palash Jana
- Department of Chemistry
- Indian Institute of Technology Gandhinagar
- Palaj
- Gandhinagar-382 355
- India
| | | | - Shikha Khandelwal
- 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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Conformation of D‐π‐A Molecular with Functional Imidazole Group: Achieving High Color Contrast Mechanochromic Behavior and Selectively Detection of Picric Acid in Aqueous Medium. ChemistrySelect 2019. [DOI: 10.1002/slct.201901978] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Dong Y, Shen J, Li W, Zhao R, Pan Y, Song Q, Zhang C. Opposite ESIPT characteristic of two AIE-active isomers with different linkage sites. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.03.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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13
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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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