1
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Abodja O, Touati N, Morel M, Rudiuk S, Baigl D. ATP/azobenzene-guanidinium self-assembly into fluorescent and multi-stimuli-responsive supramolecular aggregates. Commun Chem 2024; 7:142. [PMID: 38918507 PMCID: PMC11199595 DOI: 10.1038/s42004-024-01226-y] [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: 11/12/2023] [Accepted: 06/17/2024] [Indexed: 06/27/2024] Open
Abstract
Building stimuli-responsive supramolecular systems is a way for chemists to achieve spatio-temporal control over complex systems as well as a promising strategy for applications ranging from sensing to drug-delivery. For its large spectrum of biological and biomedical implications, adenosine 5'-triphosphate (ATP) is a particularly interesting target for such a purpose but photoresponsive ATP-based systems have mainly been relying on covalent modification of ATP. Here, we show that simply mixing ATP with AzoDiGua, an azobenzene-guanidium compound with photodependent nucleotide binding affinity, results in the spontaneous self-assembly of the two non-fluorescent compounds into photoreversible, micrometer-sized and fluorescent aggregates. Obtained in water at room temperature and physiological pH, these supramolecular structures are dynamic and respond to several chemical, physical and biological stimuli. The presence of azobenzene allows a fast and photoreversible control of their assembly. ATP chelating properties to metal dications enable ion-triggered disassembly and fluorescence control with valence-selectivity. Finally, the supramolecular aggregates are disassembled by alkaline phosphatase in a few minutes at room temperature, resulting in enzymatic control of fluorescence. These results highlight the interest of using a photoswitchable nucleotide binding partner as a self-assembly brick to build highly responsive supramolecular entities involving biological targets without the need to covalently modify them.
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Affiliation(s)
- Olivier Abodja
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Nadia Touati
- Chimie ParisTech, Université PSL, CNRS, Institut de Recherche de Chimie-Paris, PCMTH, 75005, Paris, France
| | - Mathieu Morel
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Sergii Rudiuk
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Damien Baigl
- PASTEUR, Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France.
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2
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Dobre AF, Hanganu A, Nicolau I, Popescu CC, Paun A, Mădălan AM, Tablet C, Mirea AG, Matache M. A Synthetic Approach for Oxadiazole-Decorated Azobenzene Photoswitches. Chempluschem 2024; 89:e202300504. [PMID: 37882979 DOI: 10.1002/cplu.202300504] [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: 09/06/2023] [Revised: 10/24/2023] [Accepted: 10/24/2023] [Indexed: 10/27/2023]
Abstract
This work reports the design and synthesis of novel oxadiazole-decorated azobenzenes, structural analysis of the resulting compounds and behavior under light irradiation. The synthetic strategy involved constructing amino functionalized heterocyclic key intermediates which were used either to yield electrophilic diazonium salts able to react with phenol moieties or as nucleophilic partners in Bayer-Mills reaction with nitroso-substituted derivatives. The amino-derived oxadiazole intermediates were investigated by absorption and emission spectroscopy providing blue and green emitted light. The target oxadiazole-decorated azobenzenes were structurally characterized, including solid-state structures, and subsequently used in irradiation experiments in order to take advantage of the azo group known to provide photoswitching abilities. We noticed quenching of the emissive properties in presence of the azo group; however, all compounds were very stable to repeated cycles of light irradiation. In addition, according to structural diversification we could obtain half-lives of the meta stable isomers within hours to hundreds of hours range. The experimental results were very well correlated with DFT calculations.
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Affiliation(s)
- Adela F Dobre
- Faculty of Chemistry, University of Bucharest, 90 Panduri Street, 050663, Bucharest, Romania
- Research Centre of Applied Organic Chemistry, University of Bucharest, 90 Panduri Street, 050663, Bucharest, Romania
| | - Anamaria Hanganu
- Research Centre of Applied Organic Chemistry, University of Bucharest, 90 Panduri Street, 050663, Bucharest, Romania
- "C. D. Nenitzescu" Institute of Organic and Supramolecular Chemistry of the Romanian Academy, 202B Spl. Independenţei, 060023, Bucharest, Romania
| | - Ioana Nicolau
- Faculty of Chemistry, University of Bucharest, 90 Panduri Street, 050663, Bucharest, Romania
- Research Centre of Applied Organic Chemistry, University of Bucharest, 90 Panduri Street, 050663, Bucharest, Romania
| | - Codruta C Popescu
- Faculty of Chemistry, University of Bucharest, 90 Panduri Street, 050663, Bucharest, Romania
- Research Centre of Applied Organic Chemistry, University of Bucharest, 90 Panduri Street, 050663, Bucharest, Romania
| | - Anca Paun
- Faculty of Chemistry, University of Bucharest, 90 Panduri Street, 050663, Bucharest, Romania
- Research Centre of Applied Organic Chemistry, University of Bucharest, 90 Panduri Street, 050663, Bucharest, Romania
| | - Augustin M Mădălan
- Faculty of Chemistry, University of Bucharest, 90 Panduri Street, 050663, Bucharest, Romania
| | - Cristina Tablet
- Faculty of Pharmacy, Titu Maiorescu University, Gh. Sincai Bd. 16, 040317, Bucharest, Romania
| | - Anca G Mirea
- National Institute of Material Physics, 405 A Atomistilor Street, 077125, Magurele, Romania
| | - Mihaela Matache
- Faculty of Chemistry, University of Bucharest, 90 Panduri Street, 050663, Bucharest, Romania
- Research Centre of Applied Organic Chemistry, University of Bucharest, 90 Panduri Street, 050663, Bucharest, Romania
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3
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Chen X, Fang S, Xue P, Huang J, Tang M, Wang Z. Reversible Regulation of Polar Gas Molecules by Azobenzene-Based Photoswitchable Metal-Organic Framework Thin Films. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020877. [PMID: 36677935 PMCID: PMC9860582 DOI: 10.3390/molecules28020877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/06/2023] [Accepted: 01/13/2023] [Indexed: 01/18/2023]
Abstract
The development of tunable molecule separation membranes requires materials with remote controllability and ultra-high separation capability. In this paper, a novel photoswitchable metal organic framework (MOF) thin film (Cu2(AzoBPDC)2) was prepared by liquid phase epitaxial layer-by-layer assembly to realize the reversible remote-controlled switching. The azobenzene side groups in the Cu2(AzoBPDC)2 thin film showed excellent reversible photoswitching performance under UV (365 nm) and Vis (450 nm) irradiation, achieving the remote-controlled mode of the diffusion flux of polar gas molecules in the MOF thin film.
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Affiliation(s)
- Xuan Chen
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Siyu Fang
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Ping Xue
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
- School of Pharmacy, Hubei University of Science and Technology, Xianning 437100, China
- Correspondence: (P.X.); (Z.W.)
| | - Jiming Huang
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
- School of Material and Chemical Engineering, Tongren University, Tongren 554300, China
| | - Mi Tang
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Zhengbang Wang
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
- School of Material and Chemical Engineering, Tongren University, Tongren 554300, China
- Correspondence: (P.X.); (Z.W.)
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4
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Nishikawa H, Sano K, Araoka F. Anisotropic fluid with phototunable dielectric permittivity. Nat Commun 2022; 13:1142. [PMID: 35241651 PMCID: PMC8894468 DOI: 10.1038/s41467-022-28763-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 02/11/2022] [Indexed: 11/24/2022] Open
Abstract
Dielectric permittivity, a measure of polarisability, is a fundamental parameter that dominates various physical phenomena and properties of materials. However, it remains a challenge to control the dielectric permittivity of materials reversibly over a large range. Herein, we report an anisotropic fluid with photoresponsive dielectric permittivity (200 < ε < 18,000) consisting of a fluorinated liquid-crystalline molecule (96 wt%) and an azobenzene-tethered phototrigger (4 wt%). The reversible trans-cis isomerisation of the phototrigger under blue and green light irradiation causes a switch between two liquid-crystalline phases that exhibit different dielectric permittivities, with a rapid response time (<30 s) and excellent reversibility (~100 cycles). This anisotropic fluid can be used as a flexible photovariable capacitor that, for example, allows the reversible modulation of the sound frequency over a wide range (100 < f < 8500 Hz) in a remote manner using blue and green wavelengths. Light stimuli are widely used to control material properties, yet it remains challenging to reversibly photocontrol the dielectric permittivity. Nishikawa et al. achieve this goal in an anisotropic fluid via its liquid crystal phase transition induced by isomerization of an azobenzene-tethered phototrigger.
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Affiliation(s)
- Hiroya Nishikawa
- RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
| | - Koki Sano
- RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan. .,JST PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan. .,Department of Chemistry and Materials, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano, 386-8567, Japan.
| | - Fumito Araoka
- RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
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5
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Mogale R, Conradie J, Langner EHG. Trans-Cis Kinetic Study of Azobenzene-4,4'-dicarboxylic Acid and Aluminium and Zirconium Based Azobenzene-4,4'-dicarboxylate MOFs. Molecules 2022; 27:molecules27041370. [PMID: 35209160 PMCID: PMC8875176 DOI: 10.3390/molecules27041370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 02/10/2022] [Accepted: 02/10/2022] [Indexed: 11/25/2022] Open
Abstract
Metal organic frameworks (MOFs) are porous hybrid crystalline materials that consist of organic linkers coordinated to metal centres. The trans–cis isomerisation kinetics of the azobenzene-4,4′-dicarboxylic acid (AZB(COOH)2) precursor, as well as the Al3+ (Al-AZB)- and Zr4+ (Zr-AZB)-based MOFs with azobenzene-4,4′-dicarboxylate linkers, are presented. The photo-isomerization in the MOFs originates from singly bound azobenzene moieties on the surface of the MOF. The type of solvent used had a slight effect on the rate of isomerization and half-life, while the band gap energies were not significantly affected by the solvents. Photo-responsive MOFs can be classified as smart materials with possible applications in sensing, drug delivery, magnetism, and molecular recognition. In this study, the MOFs were applied in the dye adsorption of congo red (CR) in contaminated water. For both MOFs, the UV-irradiated cis isomer exhibited a slightly higher CR uptake than the ambient-light exposed trans isomer. Al-AZB displayed a dye adsorption capacity of over 95% for both the UV-irradiated and ambient light samples. The ambient light exposed Zr-AZB, and the UV irradiated Zr-AZB had 39.1% and 44.6% dye removal, respectively.
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Affiliation(s)
- Refilwe Mogale
- Chemistry Department, University of the Free State, Bloemfontein 9300, South Africa; (R.M.); (J.C.)
| | - Jeanet Conradie
- Chemistry Department, University of the Free State, Bloemfontein 9300, South Africa; (R.M.); (J.C.)
- Department of Chemistry, UiT—The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Ernst H. G. Langner
- Chemistry Department, University of the Free State, Bloemfontein 9300, South Africa; (R.M.); (J.C.)
- Correspondence:
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6
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Das G, Prakasam T, Addicoat MA, Sharma SK, Ravaux F, Mathew R, Baias M, Jagannathan R, Olson MA, Trabolsi A. Azobenzene-Equipped Covalent Organic Framework: Light-Operated Reservoir. J Am Chem Soc 2019; 141:19078-19087. [DOI: 10.1021/jacs.9b09643] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Gobinda Das
- Chemistry Program, New York University Abu Dhabi (NYUAD), Saadiyat Island, United Arab Emirates
| | - Thirumurugan Prakasam
- Chemistry Program, New York University Abu Dhabi (NYUAD), Saadiyat Island, United Arab Emirates
| | - Matthew A. Addicoat
- School of Science and Technology, Nottingham Trent University, Clifton Lane, NG11 8NS Nottingham, U.K
| | - Sudhir Kumar Sharma
- Engineering Division, New York University Abu Dhabi (NYUAD), Saadiyat Island, United Arab Emirates
| | - Florent Ravaux
- Electrical and Computer Engineering Department, Khalifa University, 127788 Abu Dhabi, United Arab Emirates
| | - Renny Mathew
- Chemistry Program, New York University Abu Dhabi (NYUAD), Saadiyat Island, United Arab Emirates
| | - Maria Baias
- Chemistry Program, New York University Abu Dhabi (NYUAD), Saadiyat Island, United Arab Emirates
| | - Ramesh Jagannathan
- Engineering Division, New York University Abu Dhabi (NYUAD), Saadiyat Island, United Arab Emirates
| | - Mark A. Olson
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300073, People’s Republic of China
| | - Ali Trabolsi
- Chemistry Program, New York University Abu Dhabi (NYUAD), Saadiyat Island, United Arab Emirates
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7
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Yamauchi M, Yokoyama K, Aratani N, Yamada H, Masuo S. Crystallization‐Induced Emission of Azobenzene Derivatives. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908121] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mitsuaki Yamauchi
- Department of Applied Chemistry for Environment Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Kosuke Yokoyama
- Department of Applied Chemistry for Environment Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Naoki Aratani
- Division of Materials Science Nara Institute of Science and Technology 8916-5 Takayama-cho Ikoma 630-0192 Japan
| | - Hiroko Yamada
- Division of Materials Science Nara Institute of Science and Technology 8916-5 Takayama-cho Ikoma 630-0192 Japan
| | - Sadahiro Masuo
- Department of Applied Chemistry for Environment Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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8
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Yamauchi M, Yokoyama K, Aratani N, Yamada H, Masuo S. Crystallization‐Induced Emission of Azobenzene Derivatives. Angew Chem Int Ed Engl 2019; 58:14173-14178. [DOI: 10.1002/anie.201908121] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 07/25/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Mitsuaki Yamauchi
- Department of Applied Chemistry for Environment Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Kosuke Yokoyama
- Department of Applied Chemistry for Environment Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Naoki Aratani
- Division of Materials Science Nara Institute of Science and Technology 8916-5 Takayama-cho Ikoma 630-0192 Japan
| | - Hiroko Yamada
- Division of Materials Science Nara Institute of Science and Technology 8916-5 Takayama-cho Ikoma 630-0192 Japan
| | - Sadahiro Masuo
- Department of Applied Chemistry for Environment Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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9
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Zhou L, Retailleau P, Morel M, Rudiuk S, Baigl D. Photoswitchable Fluorescent Crystals Obtained by the Photoreversible Coassembly of a Nucleobase and an Azobenzene Intercalator. J Am Chem Soc 2019; 141:9321-9329. [PMID: 31117648 DOI: 10.1021/jacs.9b02836] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Self-assembled nucleobases, such as G-quartets or quadruplexes, have numerous applications, but light-responsive structures are limited to small, noncrystalline motifs. In addition, the assembly of the widely exploited azobenzene photochromic compounds can produce fluorescent crystals of extended dimensions but at the prize of sacrificing their photoswitchability. Here, we overcome inherent limitations of self-assembly with a new concept of supramolecular coassembly leading to materials with unprecedented properties. We show that the coassembly of guanosine monophosphate (GMP) with an azobenzene-containing DNA intercalator produces supramolecular crystals arranged through a combination of π-π, electrostatic, and hydrogen-bond interactions. The resulting crystals are 100 μm long, pH-sensitive, fluorescent, and can be photoreversibly disassembled/reassembled upon UV/blue irradiation. This allows us to perform operations such as dynamic photocontrol of a single-crystal growth, light-gated permeability in membrane-like materials, and photoswitchable fluorescence. We believe this concept critically expands the breadth of multifunctional materials attainable by self-assembly.
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Affiliation(s)
- Li Zhou
- PASTEUR, Department of Chemistry , Ecole Normale Supérieure, PSL University, Sorbonne Université, CNRS , Paris 75005 , France
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles , CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay , 1 av. de la Terrasse , Gif-sur-Yvette 91198 , France
| | - Mathieu Morel
- PASTEUR, Department of Chemistry , Ecole Normale Supérieure, PSL University, Sorbonne Université, CNRS , Paris 75005 , France
| | - Sergii Rudiuk
- PASTEUR, Department of Chemistry , Ecole Normale Supérieure, PSL University, Sorbonne Université, CNRS , Paris 75005 , France
| | - Damien Baigl
- PASTEUR, Department of Chemistry , Ecole Normale Supérieure, PSL University, Sorbonne Université, CNRS , Paris 75005 , France
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10
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Light-driven molecular switching of atropisomeric polymers containing azo-binaphthyl groups in their side chains. Polym J 2018. [DOI: 10.1038/s41428-018-0034-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Paitandi RP, Singh RS, Dwivedi BK, Singh VD, Pandey DS. Time dependent aggregation induced emission enhancement and the study of molecular packing in closely related azo-phenol BODIPY species. Dalton Trans 2018; 47:3785-3795. [PMID: 29446426 DOI: 10.1039/c7dt04047d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Fluorescent azo-phenol BODIPYs (1-3) have been obtained by the substituent (-OCH3/-CH3) directed synthesis of ortho (L1) and para (L2-L3) azo-phenol aldehydes. These display aggregation caused quenching (ACQ, 1) and aggregation induced emission enhancement (AIEE, 2 and 3) depending on the position of azo relative to the phenolic hydroxyl group. An intriguing time dependent morphological transition from nanospheres to ordered nanorods and subsequent emission changes in AIEE active azo-phenol BODIPYs have been successfully realized by time dependent fluorescence, scanning electron (SEM), transmission electron (TEM) and fluorescence optical microscopy (FOM) studies. The existence of one-dimensional (1D) nanorods as ultimate species in these compounds (2-3) has been supported by crystal packing patterns. Diverse aggregated forms and hierarchical nanostructures have been related to variable extents of fluorescence enhancement. The plausible charge transfer process and its role in AIEE have been supported by DFT studies.
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Affiliation(s)
- Rajendra Prasad Paitandi
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi - 221 005, India.
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12
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Raman A, Augustine G, Ayyadurai N, Easwaramoorthi S. Photoswitchable azobenzene–rhodamine tweezers for biosensing of Al3+ ions. NEW J CHEM 2018. [DOI: 10.1039/c8nj01346b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoswitchable tweezers: light catalysed enhanced binding of Al3+ using an azobenzene–rhodamine dyad by gating the photoisomerization process.
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Affiliation(s)
- Arunachalam Raman
- Inorganic and Physical Chemistry Laboratory
- CSIR-Central Leather Research Institute
- Chennai 600 020
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - George Augustine
- Department of Biochemistry and Biotechnology
- CSIR-Central Leather Research Institute
- Chennai 600 020
- India
| | - Niraikulam Ayyadurai
- Department of Biochemistry and Biotechnology
- CSIR-Central Leather Research Institute
- Chennai 600 020
- India
| | - Shanmugam Easwaramoorthi
- Inorganic and Physical Chemistry Laboratory
- CSIR-Central Leather Research Institute
- Chennai 600 020
- India
- Academy of Scientific and Innovative Research (AcSIR)
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13
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Saha M, Ghosh S, Bandyopadhyay S. Strain, switching and fluorescence behavior of a nine-membered cyclic azobenzene. NEW J CHEM 2018. [DOI: 10.1039/c8nj01643g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work defines the smallest ring size for obtaining the trans form of cyclic azobenzene as the thermally stable form.
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Affiliation(s)
- Monochura Saha
- Department of Chemical Sciences
- Indian Institute of Science Education and Research (IISER) Kolkata
- Mohanpur
- India
| | - Sanjib Ghosh
- Department of Chemical Sciences
- Indian Institute of Science Education and Research (IISER) Kolkata
- Mohanpur
- India
| | - Subhajit Bandyopadhyay
- Department of Chemical Sciences
- Indian Institute of Science Education and Research (IISER) Kolkata
- Mohanpur
- India
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14
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Huang TC, Chen YY, Chu CC, Hsiao VKS. Optothermal Switching of Cholesteric Liquid Crystals: A Study of Azobenzene Derivatives and Laser Wavelengths. MATERIALS (BASEL, SWITZERLAND) 2015; 8:6071-6084. [PMID: 28793552 PMCID: PMC5512900 DOI: 10.3390/ma8095293] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 09/07/2015] [Indexed: 12/02/2022]
Abstract
The laser-initiated thermal (optothermal) switching of cholesteric liquid crystals (CLCs) is characterized by using different azobenzene (Azo) derivatives and laser wavelengths. Under 405-nm laser irradiation, Azo-doped CLCs undergo phase transition from cholesteric to isotropic. No cis-to-trans photoisomerization occurs when the 405-nm laser irradiation is blocked because only a single laser is used. The fast response of Azo-doped CLCs under the on-off switching of the 405-nm laser occurs because of the optothermal effect of the system. The 660-nm laser, which cannot be used as irradiation to generate the trans-cis photoisomerization of Azo, is used in Anthraquinone (AQ)-Azo-doped CLCs to examine the optothermal effect of doped Azo. The results show that the LC-like Azo derivative bearing two methyl groups ortho to the Azo moiety (A4) can greatly lower the clearing temperature and generate large amount of heat in AQ-A4-doped CLCs.
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Affiliation(s)
- Tai-Chieh Huang
- Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University, Nantou 54561, Taiwan.
| | - Yen-Yu Chen
- Graduate Program of Optoelectronic Technology, National Chi Nan University, Nantou 54561, Taiwan.
| | - Chih-Chien Chu
- Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung 40201, Taiwan.
| | - Vincent K S Hsiao
- Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University, Nantou 54561, Taiwan.
- Graduate Program of Optoelectronic Technology, National Chi Nan University, Nantou 54561, Taiwan.
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15
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Han M, Cho SJ, Norikane Y, Shimizu M, Kimura A, Tamagawa T, Seki T. Multistimuli-responsive azobenzene nanofibers with aggregation-induced emission enhancement characteristics. Chem Commun (Camb) 2014; 50:15815-8. [PMID: 25375197 DOI: 10.1039/c4cc06938b] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A new azobenzene-based chromophore was synthesized to create one-dimensional (1D) nanofibers with aggregation-induced emission enhancement characteristics. The enhanced red fluorescence of the fibrous structures can be switched off via mechanical pressure, friction, or heat by pressing, rubbing, or annealing.
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Affiliation(s)
- Mina Han
- Department of Molecular Design & Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
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Chu CC, Chang YC, Tsai BK, Lin TC, Lin JH, Hsiao VKS. trans/cis-Isomerization of Fluorene-Bridged Azo Chromophore with Significant Two-Photon Absorbability at Near-Infrared Wavelength. Chem Asian J 2014; 9:3390-6. [DOI: 10.1002/asia.201402896] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Indexed: 11/08/2022]
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Yan H, Zhu L, Li X, Kwok A, Li X, Ågren H, Zhao Y. Photothermal-responsive [2]rotaxanes. RSC Adv 2013. [DOI: 10.1039/c2ra22171c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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