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Zhang L, Jeong S, Lee J, Kim J, Lee JS, Park J, Hong J, Eom JH, Kim H, Rhee YM, Lee H, Lee HS. Red Fluorescence from Organic Microdots: Leveraging Foldamer-Linked Azobenzene for Enhanced Stability and Intensity in Bioimaging Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401480. [PMID: 38949050 DOI: 10.1002/smll.202401480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 06/24/2024] [Indexed: 07/02/2024]
Abstract
Azobenzene, while relevant, has faced constraints in biological system applications due to its suboptimal quantum yield and short-wavelength emission. This study presents a pioneering strategy for fabricating organic microdots by coupling foldamer-linked azobenzene, resulting in robust fluorescence intensity and stability, especially in aggregated states, thereby showing promise for bioimaging applications. Comprehensive experimental and computational examinations elucidate the mechanisms underpinning enhanced photostability and fluorescence efficacy. In vitro and in vivo evaluations disclose that the external layer of cis-azo-foldamer microdots performs a self-sacrificial function during photo-bleaching. Consequently, these red-fluorescent microdots demonstrate extraordinary structural and photochemical stabilities over extended periods. The conjugation of a β-peptide foldamer to the azobenzene chromophore through a glycine linker instigates a blue-shifted and amplified π*-n transition. Molecular dynamics simulations reveal that the aggregated state of cis-azo-foldamers fortifies the stability of cis isomers, thereby augmenting fluorescence efficiency. This investigation furnishes crucial insights into conceptualizing novel, biologically inspired materials, promising stable and enduring imaging applications, and carries implications for diverse arenas such as medical diagnostics, drug delivery, and sensing technologies.
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Affiliation(s)
- Lianjin Zhang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
- Center for Multiscale Chiral Architectures (CMCA), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Seoneun Jeong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
- Center for Multiscale Chiral Architectures (CMCA), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jeehee Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
- Center for Multiscale Chiral Architectures (CMCA), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jaewook Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
- Center for Multiscale Chiral Architectures (CMCA), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jung Seok Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jihye Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jungwoo Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
- Center for Multiscale Chiral Architectures (CMCA), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jae-Hoon Eom
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
- Center for Multiscale Chiral Architectures (CMCA), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Hyungjun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Young Min Rhee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Haeshin Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
- Center for Multiscale Chiral Architectures (CMCA), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Hee-Seung Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
- Center for Multiscale Chiral Architectures (CMCA), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
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Gon M, Yaegashi M, Tanaka K, Chujo Y. Near-Infrared Emissive Hypervalent Compounds with Germanium(IV)-Fused Azobenzene π-Conjugated Systems. Chemistry 2023; 29:e202203423. [PMID: 36441133 DOI: 10.1002/chem.202203423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 11/28/2022] [Accepted: 11/28/2022] [Indexed: 11/30/2022]
Abstract
A novel molecular design for showing near-infrared (NIR) emission is still required for satisfying growing demands for NIR-light technology. In this research, hypervalent compounds with germanium (Ge)-fused azobenzene (GAz) scaffolds were discovered that can exhibit NIR emission (λPL =690∼721 nm, ΦPL =0.03∼0.04) despite compact π-conjugated systems. The unique optical properties are derived from the trigonal bipyramidal geometry of the hypervalent compounds constructed by combination of Ge and azobenzene-based tridentate ligands. Experimental and theoretical calculation results disclosed that the germanium-nitrogen (Ge-N) coordination at the equatorial position strongly reduces the energy level of the LUMO (lowest unoccupied molecular orbital), and the three-center four-electron (3 c-4 e) bond in the apical position effectively rises the energy level of the HOMO (highest occupied molecular orbital). It is emphasized that large narrowing of the HOMO-LUMO energy gap is achieved just by forming the hypervalent bond. In addition, the narrow-energy-gap property can be enhanced by extension of π-conjugation. The obtained π-conjugated polymer shows efficient NIR emission both in solution (λPL =770 nm and ΦPL =0.10) and film (λPL =807 nm and ΦPL =0.04). These results suggest that collaboration of a hypervalent bond and a π-conjugated system is a novel and effective strategy for tuning electronic properties even in the NIR region.
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Affiliation(s)
- Masayuki Gon
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Misao Yaegashi
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
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3
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Thu P, Han M. Role of Sterically Bulky Azobenzenes in the Molecular Assembly of Pyrene Derivatives: Rectangular Sheet-like Structures and Their Emission Characteristics. Int J Mol Sci 2023; 24:4504. [PMID: 36901934 PMCID: PMC10003733 DOI: 10.3390/ijms24054504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/17/2023] [Accepted: 02/22/2023] [Indexed: 03/02/2023] Open
Abstract
The development of pyrene-based fluorescent assembled systems with desirable emission characteristics by reducing conventional concentration quenching and/or aggregation-induced quenching (ACQ) is highly desirable. In this investigation, we designed a new azobenzene-functionalized pyrene derivative (AzPy) in which sterically bulky azobenzene is linked to pyrene. Absorption and fluorescence spectroscopic results before and after molecular assembly indicate that even in a dilute N,N-dimethylformamide (DMF) solution (~10 μM), AzPy molecules experienced significant concentration quenching, whereas the emission intensities of AzPy DMF-H2O turbid suspensions containing self-assembled aggregates were slightly enhanced and showed similar values regardless of the concentration. The shape and size of sheet-like structures, from incomplete flakes less than one micrometer in size to well-completed rectangular microstructures, could be adjusted by changing the concentration. Importantly, such sheet-like structures exhibit concentration dependence of their emission wavelength from blue to yellow-orange. Comparison with the precursor (PyOH) demonstrates that the introduction of a sterically twisted azobenzene moiety plays an important role in converting the spatial molecular arrangements from H- to J-type aggregation mode. Thus, AzPy chromophores grow into anisotropic microstructures through inclined J-type aggregation and high crystallinity, which are responsible for their unexpected emission characteristics. Our findings provide useful insight into the rational design of fluorescent assembled systems.
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Affiliation(s)
| | - Mina Han
- Department of Chemistry Education, Kongju National University, 56 Gongjudaehak-ro, Gongju 32588, Republic of Korea
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4
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Yoon Y, Jo S, Lee DH, Lee TS. Synthesis of fluorescent, ortho-azonaphthol-containing conjugated polymer for ratiometric fluoride ion sensing. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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5
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Kumar P, Gupta D, Grewal S, Srivastava A, Kumar Gaur A, Venkataramani S. Multiple Azoarenes Based Systems - Photoswitching, Supramolecular Chemistry and Application Prospects. CHEM REC 2022; 22:e202200074. [PMID: 35860915 DOI: 10.1002/tcr.202200074] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/16/2022] [Indexed: 11/05/2022]
Abstract
In the recent decades, the investigations on photoresponsive molecular systems with multiple azoarenes are quite popular in diverse perspectives ranging from fundamental understanding of multiple photoswitches, supramolecular chemistry, and various application prospects. In fact, several insightful and conceptual designs of such systems were investigated with architectural distinctions. In particular, the demonstration of applications such as data storage with the help of multistate or orthogonal photoswitches, light modulation of catalysis via cooperative switching, sensors using supramolecular host-guest interactions, and materials such as liquid crystals, grating, actuators, etc. are some of the milestones in this area. Herein, we cover the recent advancements in the research areas of multiazoarenes containing systems that have been classified into Type-1 {linear, non-linear, and core-based (A)}, Type-2 {tripodal C3 -symmetric (C3)} and Type-3 {macrocyclic (M)} structural motifs.
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Affiliation(s)
- Pravesh Kumar
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, SAS Nagar, Manauli (PO), Punjab, 140306, INDIA
| | - Debapriya Gupta
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, SAS Nagar, Manauli (PO), Punjab, 140306, INDIA
| | - Surbhi Grewal
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, SAS Nagar, Manauli (PO), Punjab, 140306, INDIA
| | - Anjali Srivastava
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, SAS Nagar, Manauli (PO), Punjab, 140306, INDIA
| | - Ankit Kumar Gaur
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, SAS Nagar, Manauli (PO), Punjab, 140306, INDIA
| | - Sugumar Venkataramani
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, SAS Nagar, Manauli (PO), Punjab, 140306, INDIA
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6
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Han M, Moe K. Light-Responsive Hexagonal Assemblies of Triangular Azo Dyes. Molecules 2022; 27:4380. [PMID: 35889253 PMCID: PMC9317042 DOI: 10.3390/molecules27144380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 07/05/2022] [Accepted: 07/05/2022] [Indexed: 12/01/2022] Open
Abstract
The rational design of small building block molecules and understanding their molecular assemblies are of fundamental importance in creating new stimuli-responsive organic architectures with desired shapes and functions. Based on the experimental results of light-induced conformational changes of four types of triangular azo dyes with different terminal functional groups, as well as absorption and fluorescence characteristics associated with their molecular assemblies, we report that aggregation-active emission enhancement (AIEE)-active compound (1) substituted with sterically crowded tert-butyl (t-Bu) groups showed approximately 35% light-induced molecular switching and had a strong tendency to assemble into highly stable hexagonal structures with AIEE characteristics. Their sizes were regulated from nanometer-scale hexagonal rods to micrometer-scale sticks depending on the concentration. This is in contrast to other triangular compounds with bromo (Br) and triphenylamine (TPA) substituents, which exhibited no photoisomerization and tended to form flexible fibrous structures. Moreover, non-contact exposure of the fluorescent hexagonal nanorods to ultraviolet (UV) light led to a dramatic hexagonal-to-amorphous structure transition. The resulting remarkable variations, such as in the contrast of microscopic images and fluorescence characteristics, were confirmed by various microscopic and spectroscopic measurements.
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Affiliation(s)
- Mina Han
- Department of Chemistry Education, Kongju National University, Gongju 32588, Korea;
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7
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Solvent- and Light-Sensitive AIEE-Active Azo Dye: From Spherical to 1D and 2D Assemblies. Int J Mol Sci 2022; 23:ijms23020965. [PMID: 35055154 PMCID: PMC8778914 DOI: 10.3390/ijms23020965] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/07/2022] [Accepted: 01/14/2022] [Indexed: 02/01/2023] Open
Abstract
Fluorescent molecular assembly systems provide an exciting platform for creating stimuli-responsive nano- and microstructured materials with optical, electronic, and sensing functions. To understand the relationship between (i) the plausible molecular structures preferentially adopted depending on the solvent polarity (such as N,N-dimethylformamide [DMF], tetrahydrofuran [THF], and toluene), (ii) the resulting spectroscopic features, and (iii) self-assembled nano-, micro-, and macrostructures, we chose a sterically crowded triangular azo dye (3Bu) composed of a polar molecular core and three peripheral biphenyl wings. The chromophore changed the solution color from yellow to pink-red depending on the solvent polarity. In a yellow DMF solution, a considerable amount of the twisted azo form could be kept stable with the help of favorable intermolecular interactions with the solvent molecules. By varying the concentration of the DMF solution, the morphology of self-assembled structures was transformed from nanoparticles to micrometer-sized one-dimensional (1D) structures such as sticks and fibers. In a pink-red toluene solution, the periphery of the central ring became more planar. The resulting significant amount of the keto-hydrazone tautomer grew into micro- and millimeter-sized 1D structures. Interestingly, when THF-H2O (1:1) mixtures were stored at a low temperature, elongated fibers were stacked sideways and eventually developed into anisotropic two-dimensional (2D) sheets. Notably, subsequent exposure of visible-light-irradiated sphere samples to solvent vapor resulted in reversible fluorescence off↔on switching accompanied by morphological restoration. These findings suggest that rational selection of organic dyes, solvents, and light is important for developing reusable fluorescent materials.
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Hoshing R, Leeber BW, Kuhn H, Caianiello D, Dale B, Saladino M, Lusi R, Palaychuk N, Weingarten S, Basu A. The Chirality of Aggregated Yariv Reagents Correlates with Their AGP-Binding Ability*. Chembiochem 2021; 23:e202100532. [PMID: 34618387 DOI: 10.1002/cbic.202100532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Indexed: 11/10/2022]
Abstract
Yariv reagents are glycosylated triphenylazo dyes that bind to arabinogalactan proteins (AGPs), proteoglycans found in plant cell walls that are integral for plant growth and development. Yariv reagents are widely utilized as imaging, purification, and quantification tools for AGPs and represent the only small molecule probe for interrogating AGP function. The ability of Yariv reagents to bind to AGPs is dependent on the structure of the terminal glycoside on the dye. The reason for this selectivity has not been understood until the present work. Using circular dichroism spectroscopy, we show that the Yariv reagents form supramolecular aggregates with helical chirality. More significantly, the ability of the Yariv reagent to bind AGPs is correlated with this helical chirality. This finding paves the way towards developing a more detailed understanding of the nature of the Yariv-AGP complex, and the design of AGP-binding reagents with higher affinities and selectivities.
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Affiliation(s)
- Raghuraj Hoshing
- Department of Chemistry, Box H, Brown University, Providence, RI 02912, USA
| | - Blaise W Leeber
- Department of Chemistry, Box H, Brown University, Providence, RI 02912, USA
| | - Helene Kuhn
- Department of Chemistry, Box H, Brown University, Providence, RI 02912, USA
| | - David Caianiello
- Department of Chemistry, Box H, Brown University, Providence, RI 02912, USA
| | - Brandon Dale
- Department of Chemistry, Box H, Brown University, Providence, RI 02912, USA
| | - Michael Saladino
- Department of Chemistry, Box H, Brown University, Providence, RI 02912, USA
| | - Robert Lusi
- Department of Chemistry, Box H, Brown University, Providence, RI 02912, USA
| | - Natalie Palaychuk
- Department of Chemistry, Box H, Brown University, Providence, RI 02912, USA
| | - Sarah Weingarten
- Department of Chemistry, Box H, Brown University, Providence, RI 02912, USA
| | - Amit Basu
- Department of Chemistry, Box H, Brown University, Providence, RI 02912, USA
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Abstract
The reversible photoisomerization of azobenzenes has been extensively studied to construct systems with optical responsiveness; however, this process limits the luminescence of these compounds. Recently, there have been many efforts to design and synthesize fluorescent azobenzene compounds, such as inhibition of electron transfer, inducing aggregation, and metal-enhancement, which make the materials ideal for application in fluorescence probes, light-emitting devices, molecular detection, etc. Herein, we review the recently reported progress in the development of various fluorescent azobenzenes and summarize the possible mechanism of their fluorescence emission. The potential applications of these materials are also discussed. Finally, in order to guide research in this field, the existing problems and future development prospects are discussed.
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10
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Morphologically Diverse Micro- and Macrostructures Created via Solvent Evaporation-Induced Assembly of Fluorescent Spherical Particles in the Presence of Polyethylene Glycol Derivatives. Molecules 2021; 26:molecules26144294. [PMID: 34299568 PMCID: PMC8304015 DOI: 10.3390/molecules26144294] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/09/2021] [Accepted: 07/13/2021] [Indexed: 11/28/2022] Open
Abstract
The creation of fluorescent micro- and macrostructures with the desired morphologies and sizes is of considerable importance due to their intrinsic functions and performance. However, it is still challenging to modulate the morphology of fluorescent organic materials and to obtain insight into the factors governing the morphological evolution. We present a facile bottom-up approach to constructing diverse micro- and macrostructures by connecting fluorescent spherical particles (SPs), which are generated via the spherical assembly of photoisomerizable azobenzene-based propeller-shaped chromophores, only with the help of commercially available polyethylene glycol (PEG) derivatives. Without any extra additives, solvent evaporation created a slow morphological evolution of the SPs from short linear chains (with a length of a few micrometers) to larger, interconnected networks and sheet structures (ranging from tens to >100 µm) at the air–liquid interface. Their morphologies and sizes were significantly dependent on the fraction and length of the PEG. Our experimental results suggest that noncovalent interactions (such as hydrophobic forces and hydrogen bonding) between the amphiphilic PEG chains and the relatively hydrophobic SPs were weak in aqueous solutions, but play a crucial role in creating the morphologically diverse micro- and macrostructures. Moreover, short-term irradiation with visible light caused fast morphological crumpling and fluorescence switching of the obtained structures.
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11
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Photochromism and photo-switchable luminescence properties of a methacrylate-based inorganic-organic hybrid compound. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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12
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Jo S, Ahn H, Park SY, Lee TS. Synthesis of gelation-induced emissive, o-phenylazonaphthol-based organogel and its responsiveness to fluoride anion. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131895] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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13
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Gon M, Tanaka K, Chujo Y. Discovery of Functional Luminescence Properties Based on Flexible and Bendable Boron-Fused Azomethine/Azobenzene Complexes with O,N,O-Type Tridentate Ligands. CHEM REC 2021; 21:1358-1373. [PMID: 33394567 DOI: 10.1002/tcr.202000156] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 12/19/2020] [Accepted: 11/21/2020] [Indexed: 12/17/2022]
Abstract
Azomethine (C=N) and azo (N=N) scaffolds are a part of structural units in poly(p-phenylene azomethine) (PAM) and poly(p-phenylene azo) (PAZ), respectively. Poly(p-phenylene vinylene) (PPV) is known to be one of luminescent π-conjugated polymers, meanwhile PAM and PAZ, which are the aza-substituted PPV analogues, are regarded as weak or no emissive materials. However, by the boron complexation, intense emission can be induced. Furthermore, environment-sensitivity and stimuli-responsivity were also observed. In this review, we demonstrate unique and versatile luminescent properties based on "flexible and bendable" π-conjugated systems composed of the boron-fused azomethine and azobenzene complexes (BAm and BAz) with the O,N,O-type tridentate ligands. The "flexible and bendable" luminophores showed intriguing optical behaviors, such as thermosalient effect, aggregation-induced emission (AIE) and crystallized-induced emission (CIE). Moreover, highly efficient emissions both in solution and film states were observed from the polymers. We illustrate the results and mechanisms on these luminescent properties from the series of our recent studies with BAm and BAz complexes and polymers.
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Affiliation(s)
- Masayuki Gon
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
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14
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Lwin KM, Park S, Han M. Changes in Fluorescence, Color, and Morphology of Fluorescent Nanostructures under Successive Light Irradiation. J PHOTOPOLYM SCI TEC 2020. [DOI: 10.2494/photopolymer.33.67] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Khin Moe Lwin
- Department of Chemistry, Kongju National University
- Department of Chemistry Education, Kongju National University
| | | | - Mina Han
- Department of Chemistry Education, Kongju National University
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15
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Halabi JM, Ahmed E, Catalano L, Karothu DP, Rezgui R, Naumov P. Spatial Photocontrol of the Optical Output from an Organic Crystal Waveguide. J Am Chem Soc 2019; 141:14966-14970. [DOI: 10.1021/jacs.9b07645] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Jad Mahmoud Halabi
- New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates
| | - Ejaz Ahmed
- New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates
| | - Luca Catalano
- New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates
| | | | - Rachid Rezgui
- New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates
| | - Panče Naumov
- New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates
- Radcliffe Institute for Advanced Study, Harvard University, 10 Garden Street, Cambridge, Massachusetts 02138, United States
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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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17
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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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18
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Photoactive Boron–Nitrogen–Carbon Hybrids: From Azo-borazines to Polymeric Materials. J Org Chem 2019; 84:9101-9116. [DOI: 10.1021/acs.joc.9b01046] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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19
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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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20
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Goskulwad SP, More VG, Kobaisi MA, Bhosale RS, La DD, Antolasic F, Bhosale SV, Bhosale SV. Solvent‐Induced Self‐Assembly of Naphthalenediimide Conjugated to Tetraphenylethene through D‐ and L‐Alanine. ChemistrySelect 2019. [DOI: 10.1002/slct.201900087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Santosh P. Goskulwad
- Polymers and Functional Materials DivisionCSIR-Indian Institute of Chemical Technology Hyderabad- 500007, Telangana India
- Academy of Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
| | - Vishal G. More
- Department of ChemistryGoa University, Taleigao Plateau Goa- 403206 India
| | - Mohammad Al Kobaisi
- Department of Chemistry and BiotechnologyFSETSwinburne University of Technology Hawthorn VIC - 3122 Australia
| | - Rajesh S. Bhosale
- Department of ChemistryIndrashil University, Kadi Mehsana- 382740, Gujarat India
| | - Dung Duc La
- Institute of Chemistry and Materials 17 Hoang Sam, Cay Giay Hanoi Vietnam
| | - Frank Antolasic
- School of ScienceRoyal Melbourne Institute of Technology University Melbourne, VIC 3001 Australia
| | - Sidhanath V. Bhosale
- Polymers and Functional Materials DivisionCSIR-Indian Institute of Chemical Technology Hyderabad- 500007, Telangana India
- Academy of Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
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21
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Das D, Roy Choudhury A. Water-assisted ground state intra-molecular proton transfer in 2,5-dihydroxy-substituted azobenzenes: experimental and computational studies. CrystEngComm 2019. [DOI: 10.1039/c8ce01878b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The phenomenon of ground-state proton transfer in a series of 2,5-dihydroxy azobenzene derivatives has been studied. In addition, the effect of the substitutions and water molecules has been investigated by the theoretical calculation.
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Affiliation(s)
- Dhiraj Das
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Mohali
- India
| | - Angshuman Roy Choudhury
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Mohali
- India
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22
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Abe I, Han M. Green-light-induced melting of self-assembled azobenzene nano/microstructures. NEW J CHEM 2019. [DOI: 10.1039/c9nj05084a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nano/microstructures assembled from trigonal molecules with three ortho-dialkylated azobenzene wings exhibit green-light-induced melting, color tuning and fluorescence switching.
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Affiliation(s)
- Ikue Abe
- Department of Chemistry and Biotechnology
- Tottori University
- Tottori 680-8552
- Japan
| | - Mina Han
- Department of Chemistry and Biotechnology
- Tottori University
- Tottori 680-8552
- Japan
- Department of Chemistry Education
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23
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Yoon Y, Jo S, Park SJ, Kim HM, Kim D, Lee TS. Unusual fluorescence of o-phenylazonaphthol derivatives with aggregation-induced emission and their use in two-photon cell imaging. Chem Commun (Camb) 2019; 55:6747-6750. [DOI: 10.1039/c9cc03106e] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Unusual fluorescence of o-phenylazonaphthol derivatives with aggregated-induced emission (AIE) is reported for the first time, which can be used in two-photon cell imaging applications.
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Affiliation(s)
- Yeoju Yoon
- Organic and Optoelectronic Materials Laboratory
- Department of Advanced Organic Materials and Textile System Engineering
- Chungnam National University
- Daejeon 34134
- Korea
| | - Seonyoung Jo
- Organic and Optoelectronic Materials Laboratory
- Department of Advanced Organic Materials and Textile System Engineering
- Chungnam National University
- Daejeon 34134
- Korea
| | - Sang Jun Park
- Department of Chemistry and Department of Energy Systems Research
- Ajou University
- Suwon 16499
- Korea
| | - Hwan Myung Kim
- Department of Chemistry and Department of Energy Systems Research
- Ajou University
- Suwon 16499
- Korea
| | - Dongwook Kim
- Department of Chemistry
- Kyonggi University
- Suwon 16227
- Korea
| | - Taek Seung Lee
- Organic and Optoelectronic Materials Laboratory
- Department of Advanced Organic Materials and Textile System Engineering
- Chungnam National University
- Daejeon 34134
- Korea
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24
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Huang L, Wu C, Zhang L, Ma Z, Jia X. A Mechanochromic and Photochromic Dual-Responsive Co-assembly with Multicolored Switch: A Peptide-Based Dendron Strategy. ACS APPLIED MATERIALS & INTERFACES 2018; 10:34475-34484. [PMID: 30212178 DOI: 10.1021/acsami.8b10933] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this contribution, we report a unique co-assembly composed of pyrene and spiropyran that were linked separately at the focal point of the same peptide-based dendron (Phe-Glu), in which the dendrons offer driving forces for the coaggregation. A series of co-assemblies with different weight ratios (Py-Phe-Glu/SP-Phe-Glu) were prepared and the morphology could be tuned. It is found that the resulting stable co-assembled organogel is double switchable triggered by light and heat. TEM revealed that, in the xerogel, Py-Phe-Glu formed rigid rod nanofibers with large diameters and acted as a rigid sketelon where the gracile interwoven fibrous structure of SP-Phe-Glu grew. More interestingly, the original powder of the co-assembled xerogel (1.0 mg/0.1 mg) not only displayed a sequential high-contrast tricolored switch from dark blue to bright cyan and to red under external force but also presented multistate accessible photochromic properties. Such mechanochromic and photochromic behaviors of the xerogel are mainly due to the transition of different excimers of pyrene and the force/photoinduced ring-opening reaction of spiropyran. It is rarely reported that self-assembled soft materials achieve mechanochromic and photochromic dual-responsive behaviors with a high-contrast multicolored switch. We believe the co-assembly strategy based on polypeptide dendrons can be extended to other systems for establishing novel intelligent fluorescent materials.
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Affiliation(s)
- Lili Huang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
| | - Chenyang Wu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
| | - Linghao Zhang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
| | - Zhiyong Ma
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
| | - Xinru Jia
- Beijing National Laboratory for Molecular Sciences, and Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China
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25
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Seki T. A Wide Array of Photoinduced Motions in Molecular and Macromolecular Assemblies at Interfaces. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20180076] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Takahiro Seki
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8603, Japan
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26
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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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27
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Li Q, Yuan Y, He L, Liu S, Zhang H. Multistimuli-responsive small-molecule compound with aggregation-induced emission enhancement characteristics: preparation, properties and applications. NEW J CHEM 2018. [DOI: 10.1039/c8nj04962a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A novel multifunctional luminescent small-molecule compound with aggregation-induced emission enhancement characteristics was successfully designed and synthesized.
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Affiliation(s)
- Qiangjun Li
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province
- Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Yongjie Yuan
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province
- Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Lifang He
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province
- Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Shenglan Liu
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province
- Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Hailiang Zhang
- Key Laboratory of Polymeric Materials and Application Technology of Hunan Province
- Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
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28
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Influence of Odd and Even Alkyl Chains on Supramolecular Nanoarchitecture via Self-Assembly of Tetraphenylethylene-Based AIEgens. APPLIED SCIENCES-BASEL 2017. [DOI: 10.3390/app7111119] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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29
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Costa AL, Gomes AC, Pillinger M, Gonçalves IS, Pina J, Seixas de Melo JS. Insights into the Photophysics and Supramolecular Organization of Congo Red in Solution and the Solid State. Chemphyschem 2017; 18:564-575. [DOI: 10.1002/cphc.201601236] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Ana L. Costa
- Coimbra Chemistry Centre, Department of Chemistry; University of Coimbra; Rua Larga 3004-535 Coimbra Portugal
| | - Ana C. Gomes
- Department of Chemistry, CICECO-Aveiro Institute of Materials; University of Aveiro; Campus Universitário de Santiago 3810-193 Aveiro Portugal
| | - Martyn Pillinger
- Department of Chemistry, CICECO-Aveiro Institute of Materials; University of Aveiro; Campus Universitário de Santiago 3810-193 Aveiro Portugal
| | - Isabel S. Gonçalves
- Department of Chemistry, CICECO-Aveiro Institute of Materials; University of Aveiro; Campus Universitário de Santiago 3810-193 Aveiro Portugal
| | - João Pina
- Coimbra Chemistry Centre, Department of Chemistry; University of Coimbra; Rua Larga 3004-535 Coimbra Portugal
| | - J. Sérgio Seixas de Melo
- Coimbra Chemistry Centre, Department of Chemistry; University of Coimbra; Rua Larga 3004-535 Coimbra Portugal
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30
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31
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Sagara Y, Yamane S, Mitani M, Weder C, Kato T. Mechanoresponsive Luminescent Molecular Assemblies: An Emerging Class of Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:1073-95. [PMID: 26461848 DOI: 10.1002/adma.201502589] [Citation(s) in RCA: 446] [Impact Index Per Article: 55.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Revised: 07/19/2015] [Indexed: 05/05/2023]
Abstract
The possibility to change the molecular assembled structures of organic and organometallic materials through mechanical stimulation is emerging as a general and powerful concept for the design of functional materials. In particular, the photophysical properties such as photoluminescence color, quantum yield, and emission lifetime of organic and organometallic fluorophores can significantly depend on the molecular packing, enabling the development of molecular materials with mechanoresponsive luminescence characteristics. Indeed, an increasing number of studies have shown in recent years that mechanical force can be utilized to change the molecular arrangement, and thereby the optical response, of luminescent molecular assemblies of π-conjugated organic or organometallic molecules. Here, the development of such mechanoresponsive luminescent (MRL) molecular assemblies consisting of organic or organometallic molecules is reviewed and emerging trends in this research field are summarized. After a brief introduction of mechanoresponsive luminescence observed in molecular assemblies, the concept of "luminescent molecular domino" is introduced, before molecular materials that show turn-on/off of photoluminescence in response to mechanical stimulation are reviewed. Mechanically stimulated multicolor changes and water-soluble MRL materials are also highlighted and approaches that combine the concept of MRL molecular assemblies with other materials types are presented in the last part of this progress report.
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Affiliation(s)
- Yoshimitsu Sagara
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, CH-1700, Switzerland
| | - Shogo Yamane
- National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1, Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Masato Mitani
- Department of Chemistry and Biotechnology, School of Engineering, the University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Christoph Weder
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, CH-1700, Switzerland
| | - Takashi Kato
- Department of Chemistry and Biotechnology, School of Engineering, the University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
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32
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Han M, Cho SJ, Norikane Y, Shimizu M, Seki T. Assembly of an Achiral Chromophore into Light-Responsive Helical Nanostructures in the Absence of Chiral Components. Chemistry 2016; 22:3971-5. [PMID: 26781522 DOI: 10.1002/chem.201600227] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Indexed: 11/12/2022]
Abstract
The chirality found in living organisms is one of unsolved mysteries on Earth. It is crucial to understand the manner in which small achiral molecules evolve into helical superstructures in the absence of chiral components because this process can provide important insights regarding the origin of chirality in nature. 1) the uncommon helical assembly of an achiral trigonal chromophore into helical nanostructures with aggregation-induced emission enhancement (AIEE) characteristics and 2) the tunability of the helical pitch and fluorescence intensity in response to light is reported. The Rietveld refinement of X-ray diffraction (XRD) patterns and the growth process suggest that a striking transformation from an achiral to an asymmetric molecule can occur as a result of specific interactions with certain solvents, presumably leading to the unique helical assembly. More importantly, exposure to UV or visible light promoted not only the formation of irregular helical structures with a wide range of pitch lengths but also an increase in fluorescence intensity.
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Affiliation(s)
- Mina Han
- Department of Molecular Design & Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan. .,Department of Chemistry and Biotechnology, Tottori University, 4-101 Koyama Minami, Tottori, 680-8552, Japan.
| | - Sung June Cho
- Department of Chemical Engineering, Chonnam National University, Yongbong 300, Buk-gu, Gwangju, 500-757, Korea
| | - Yasuo Norikane
- Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, Higashi 1-1-1, Tsukuba, Ibaraki, 305-8565, Japan
| | - Masaki Shimizu
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, 1 Hashikami-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Takahiro Seki
- Department of Molecular Design & Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
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33
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Li H, Zheng X, Su H, Lam JWY, Sing Wong K, Xue S, Huang X, Huang X, Li BS, Tang BZ. Synthesis, optical properties, and helical self-assembly of a bivaline-containing tetraphenylethene. Sci Rep 2016; 6:19277. [PMID: 26758799 PMCID: PMC4725923 DOI: 10.1038/srep19277] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Accepted: 10/26/2015] [Indexed: 11/25/2022] Open
Abstract
A chiral tetraphenylethene derivative with two valine-containing attachments (TPE-DVAL), was synthesized by Cu(I)-catalyzed azide-alkyne "click" reaction. The optical properties and self-assembling behaviours of TPE-DVAL were investigated. The molecule is non-emissive and circular dichroism (CD)-silent in solution, but shows strong fluorescence and Cotton effects in the aggregation state, demonstrating aggregation-induced emission (AIE) and CD (AICD) characteristics. TPE-DVAL exhibits good circularly polarized luminescence (CPL) when depositing on the surface of quartz to allow the evaporation of its 1,2-dichloroethane solution. SEM and TEM images of the molecule show that the molecule readily self-assembles into right-handed helical nanofibers upon the evaporation of its solvent of DCE. The molecular alignments and interactions in assembling process are further explored through XRD analysis and computational simulation. The driving forces for the formation of the helical fibers were from the cooperative effects of intermolecular hydrogen bonding, π-π interactions and steric effect.
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Affiliation(s)
- Hongkun Li
- Key Laboratory of New Lithium-Ion Battery and Mesoporous Material, Department of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
- Department of Chemistry, Institute for Advanced Study, Institute of Molecular Functional Materials, and State Key laboratory of Molecular Neuroscience, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
| | - Xiaoyan Zheng
- Department of Chemistry, Institute for Advanced Study, Institute of Molecular Functional Materials, and State Key laboratory of Molecular Neuroscience, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Huimin Su
- Department of Physics, HKUST, Clear Water Bay, Kowloon, Hong Kong, China
| | - Jacky W. Y. Lam
- Department of Chemistry, Institute for Advanced Study, Institute of Molecular Functional Materials, and State Key laboratory of Molecular Neuroscience, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
- HKUST-Shenzhen Research Institute, No. 9 Yuexing 1st RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
| | - Kam Sing Wong
- Department of Physics, HKUST, Clear Water Bay, Kowloon, Hong Kong, China
| | - Shan Xue
- Key Laboratory of New Lithium-Ion Battery and Mesoporous Material, Department of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Xuejiao Huang
- Key Laboratory of New Lithium-Ion Battery and Mesoporous Material, Department of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Xuhui Huang
- Department of Chemistry, Institute for Advanced Study, Institute of Molecular Functional Materials, and State Key laboratory of Molecular Neuroscience, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Bing Shi Li
- Key Laboratory of New Lithium-Ion Battery and Mesoporous Material, Department of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Ben Zhong Tang
- Department of Chemistry, Institute for Advanced Study, Institute of Molecular Functional Materials, and State Key laboratory of Molecular Neuroscience, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
- HKUST-Shenzhen Research Institute, No. 9 Yuexing 1st RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
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Xing XS, Chen ZW, Cai LZ, Sun C, Cai LR, Wang MS, Guo GC. An electron-transfer photochromic metal–organic framework (MOF) compound with a long-lived charge-separated state and high-contrast photoswitchable luminescence. RSC Adv 2016. [DOI: 10.1039/c5ra25707g] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new photochromic MOF compound exhibits a charge-separated state with lifetime exceeding the reported values of the analogues and a luminescence contrast higher than those of most known pyridine derivative-based photochromic compounds.
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Affiliation(s)
- Xiu-Shuang Xing
- College of Chemistry
- Fuzhou University
- Fuzhou
- P. R. China
- State Key Laboratory of Structural Chemistry
| | - Zi-Wei Chen
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Li-Zhen Cai
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Cai Sun
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Lin-Rong Cai
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Ming-Sheng Wang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Guo-Cong Guo
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- P. R. China
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35
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Wang J, Wang S, Zhou Y, Wang X, He Y. Fast Photoinduced Large Deformation of Colloidal Spheres from a Novel 4-arm Azobenzene Compound. ACS APPLIED MATERIALS & INTERFACES 2015; 7:16889-16895. [PMID: 26168368 DOI: 10.1021/acsami.5b05651] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A novel 4-arm shaped amphiphilic azobenzene compound was synthesized. The tetraphenylethylene (TPE) core precursor was prepared and further modified by azo coupling reaction at the four peripheral groups. Colloidal spheres could be directly prepared by self-assembly of the prepared amphiphilic azobenzene compound in selective solvents (THF/H2O), which were characterized by using transmission electron microscopy. The colloid diameters could be controlled by adjusting the initial compound concentration and water-adding rate in the preparation processes. By irradiation with visible linearly polarized LED light (450 nm), fast photoinduced deformation of the colloidal spheres along the polarization direction was observed. A very large deformation degree (l/d > 4) could be easily obtained.
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Affiliation(s)
- Jilei Wang
- Department of Chemical Engineering, Key Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing 100084, People's Republic of China
| | - Shihang Wang
- Department of Chemical Engineering, Key Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing 100084, People's Republic of China
| | - Yuqi Zhou
- Department of Chemical Engineering, Key Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing 100084, People's Republic of China
| | - Xiaogong Wang
- Department of Chemical Engineering, Key Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing 100084, People's Republic of China
| | - Yaning He
- Department of Chemical Engineering, Key Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing 100084, People's Republic of China
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Chen Y, Quan M, Yu H, Zhang L, Yang H, Lu Y. Fabrication of nanofibres with azopyridine compounds in various acids and solvents. RSC Adv 2015. [DOI: 10.1039/c5ra02089a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Supramolecular self-organization behaviours of one azopyridine compound were systematically studied in a series of inorganic acids and various organic solvents.
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Affiliation(s)
- Yinjie Chen
- Department of Materials Physics and Chemistry
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Maohua Quan
- Department of Materials Physics and Chemistry
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Haifeng Yu
- Department of Materials Science and Engineering
- College of Engineering
- Peking University
- Beijing 100871
- P. R. China
| | - Lanying Zhang
- Department of Materials Science and Engineering
- College of Engineering
- Peking University
- Beijing 100871
- P. R. China
| | - Huai Yang
- Department of Materials Physics and Chemistry
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
- Department of Materials Science and Engineering
| | - Yunfeng Lu
- Department of Chemical and Biomolecular Engineering
- University of California
- Los Angeles
- USA
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