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Chumak AY, Mudrak VO, Kotlyar VM, Doroshenko AO. 4’-Nitroflavonol fluorescence: Excited state intramolecular proton transfer reaction from the non-emissive excited state. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.112978] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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2
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Sairi AS, Kuwahara K, Sasaki S, Suzuki S, Igawa K, Tokita M, Ando S, Morokuma K, Suenobu T, Konishi GI. Synthesis of fluorescent polycarbonates with highly twisted N, N-bis(dialkylamino)anthracene AIE luminogens in the main chain. RSC Adv 2019; 9:21733-21740. [PMID: 35518854 PMCID: PMC9066558 DOI: 10.1039/c9ra03701b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 07/09/2019] [Indexed: 01/09/2023] Open
Abstract
A synthetic route to embed aggregation-induced-emission-(AIE)-active luminophores in polycarbonates (PCs) in various ratios is reported. The AIE-active monomer is based on the structure of 9,10-bis(piperidyl)anthracene. The obtained PCs display good film-forming properties, similar to those observed in poly(bisphenol A carbonate) (Ba-PC). The fluorescence quantum yield (Φ) of the PC with 5 mol% AIE-active monomer was 0.04 in solution and 0.53 in solid state. Moreover, this PC is also miscible with commercially available Ba-PC at any blending ratio. A combined analysis by scanning electron microscopy and differential scanning calorimetry did not indicate any clear phase separation. These results thus suggest that even engineering plastics like polycarbonates can be functionalized with AIE luminogens without adverse effects on their physical properties.
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Affiliation(s)
- Amir Sharidan Sairi
- Department of Chemical Science and Engineering, Tokyo Institute of Technology Meguro-ku Tokyo 152-8552 Japan
| | - Kohei Kuwahara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology Meguro-ku Tokyo 152-8552 Japan
| | - Shunsuke Sasaki
- Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS 44322 Nantes Cedex 3 France
| | - Satoshi Suzuki
- Fukui Institute for Fundamental Chemistry, Kyoto University Kyoto 606-8103 Japan
| | - Kazunobu Igawa
- Institute for Materials Chemistry and Engineering, Kyushu University Fukuoka 816-8580 Japan
- Institute for Materials Chemistry and Engineering, IRCCS, Kyushu University Fukuoka 816-8580 Japan
| | - Masatoshi Tokita
- Department of Chemical Science and Engineering, Tokyo Institute of Technology Meguro-ku Tokyo 152-8552 Japan
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology Meguro-ku Tokyo 152-8552 Japan
| | - Keiji Morokuma
- Fukui Institute for Fundamental Chemistry, Kyoto University Kyoto 606-8103 Japan
| | - Tomoyoshi Suenobu
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Osaka University 2-1 Yamada-oka Suita Osaka 565 Japan
| | - Gen-Ichi Konishi
- Department of Chemical Science and Engineering, Tokyo Institute of Technology Meguro-ku Tokyo 152-8552 Japan
- PRESTO, Japan Science and Technology Agency (JST) Japan
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3
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Baig MK, Prusti B, Roy D, Sahu PK, Sarkar M, Sharma A, Chakravarty M. Weak Donor-/Strong Acceptor-Linked Anthracenyl π-Conjugates as Solvato(fluoro)chromophore and AEEgens: Contrast between Nitro and Cyano Functionality. ACS OMEGA 2018; 3:9114-9125. [PMID: 31459046 PMCID: PMC6644878 DOI: 10.1021/acsomega.8b01258] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 07/30/2018] [Indexed: 05/06/2023]
Abstract
Steady development on photophysical behaviors for a variety of organic fluorophores inspired us to generate anthracene-based fluorescent molecules with a strong acceptor and a significantly weak donor through a π-spacer. Such molecules are found to have substantial twisted conformational orientations in the solid state and enhanced apolar character because of the attachment of tolyl or mesityl group with an anthracenyl core. Upon exposure to a variety of solvents, strong solvatochromism was noticed for 4-nitro compound (84 nm red shift) in contrast to the cyano analogue (18 nm red shift). Both these probes were highly emissive in apolar solvents while nitro-analogue, in particular, could discriminate the solvents of E T(30) (a measure of microscopic solvent polarity) ranging from 31 to 37. Thus, 4-nitro compounds can be successfully employed to detect and differentiate the apolar solvents. On the contrary, the 2-nitro analogue is almost nonemissive for the same range of solvents perhaps because of favorable excited-state intramolecular proton-transfer process. The fundamental understanding of solvatochromic properties through the formation of twisted intramolecular charge-transfer (TICT) state is experimentally analyzed by synthesizing and studying the π-conjugates linked to only benzene in place of nitro or cyanobenzene, which exhibits no solvatochromism and that helped finding the possible emission, originated from the locally excited state. Moreover, the molecular structures for these compounds are determined by the single-crystal X-ray diffraction studies to examine the change in emission properties with molecular packing and alignment in the aggregated state. The measurement of dihedral angles between the substituents and anthracenyl core was helpful in finding the possible extent of electronic conjugations within the system to decipher both solvatochromism and aggregation enhanced emission (AEE)-behavior. The cyano analogue exhibited prominent AEE-behavior, whereas nitro analogues showed the aggregation-caused quenching effect. The reason behind such dissimilarity in solvatochromism and AEE-behavior between cyano- and nitro-linked anthracenyl π-conjugates are also addressed through experimental outcomes.
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Affiliation(s)
- Moghal
Zubair Khalid Baig
- Department
of Chemistry, Birla Institute of Technology
and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shamirpet
Mandal, Hyderabad, Telangana 500078, India
| | - Banchhanidhi Prusti
- Department
of Chemistry, Birla Institute of Technology
and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shamirpet
Mandal, Hyderabad, Telangana 500078, India
| | - Durba Roy
- Department
of Chemistry, Birla Institute of Technology
and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shamirpet
Mandal, Hyderabad, Telangana 500078, India
| | - Prabhat Kumar Sahu
- School
of Chemical Sciences, National Institute
of Science Education and Research Bhubaneswar, Jatni, Odisha 752050, India
| | - Moloy Sarkar
- School
of Chemical Sciences, National Institute
of Science Education and Research Bhubaneswar, Jatni, Odisha 752050, India
| | - Aayushi Sharma
- Department
of Chemistry, Birla Institute of Technology
and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shamirpet
Mandal, Hyderabad, Telangana 500078, India
| | - Manab Chakravarty
- Department
of Chemistry, Birla Institute of Technology
and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shamirpet
Mandal, Hyderabad, Telangana 500078, India
- E-mail: (M.C.)
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4
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Sasaki S, Konishi GI. Thermo-responsive fluorescence of AIE-active poly(N-isopropylacrylamides) labeled with highly twisted bis(N,N-dialkylamino)arenes. RSC Adv 2017. [DOI: 10.1039/c7ra01212h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
A thermo-responsive fluorescent polymer materials were synthesized fromN-isopropylacrylamides with AIE-active 9,10-bis(N,N-dialkylamino)arene monomers.
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Affiliation(s)
- Shunsuke Sasaki
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Tokyo
- Japan
| | - Gen-ichi Konishi
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Tokyo
- Japan
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5
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Chen CH, Niko Y, Konishi GI. Amphiphilic gels of solvatochromic fluorescent poly(2-oxazoline)s containing D–π–A pyrenes. RSC Adv 2016. [DOI: 10.1039/c6ra06251b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report amphiphilic, fluorescent, solvatochromic poly(2-methyl-2-oxazoline) (POZO-py) and poly(2-ethyl-2-oxazoline) (PEtOZO-py), which contain D–π–A pyrene dye units in their side chains.
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Affiliation(s)
- Chia-Hsiu Chen
- Department of Organic and Polymeric Materials
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - Yosuke Niko
- Department of Organic and Polymeric Materials
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - Gen-ichi Konishi
- Department of Organic and Polymeric Materials
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
- PRESTO
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Ishi-i T. Light-emitting Donor-acceptor Dyes in Water: Creation of Light-emitting System Based on Aggregation of Donor-acceptor Dyes. J SYN ORG CHEM JPN 2016. [DOI: 10.5059/yukigoseikyokaishi.74.781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tsutomu Ishi-i
- Department of Biochemistry and Applied Chemistry, National Institute of Technology, Kurume College
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7
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Niko Y, Moritomo H, Sugihara H, Suzuki Y, Kawamata J, Konishi GI. A novel pyrene-based two-photon active fluorescent dye efficiently excited and emitting in the 'tissue optical window (650-1100 nm)'. J Mater Chem B 2014; 3:184-190. [PMID: 32261938 DOI: 10.1039/c4tb01404a] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The development of two-photon (TP) active fluorophores remains an important issue. Dyes that can be excited and fluoresce efficiently in the 'tissue optical window' (650-1100 nm) are especially in demand to maximize the underlying performance of two-photon fluorescence microscopy (TPFM) as an advanced optical technique. Ideally, such dyes would be compatible with the 1050 nm femtosecond fibre laser, which has recently been developed as an inexpensive excitation source to make the TPFM technique universal. In this work, we designed and synthesized a novel pyrene-based acceptor-π-acceptor (A-π-A) dye, PY, which exhibited outstanding properties such as bright fluorescence (λem = 650 nm and ΦFL = 0.80) and a large two-photon absorption cross-section (1100 GM (1 GM = 10-50 cm4 per photon per molecule) at 950 nm and 380 GM at 1050 nm) in the tissue optical window. In living mitochondria, PY provided more sensitive microscopic images than current dyes and showed great potential to be a building block of TP active fluorescent probes for the 1050 nm fibre laser. We believe that the exceptional properties of PY will be extended to other fluorescent probes through further chemical modification.
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Affiliation(s)
- Yosuke Niko
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1, Ookayama, Tokyo 152-8552, Japan.
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8
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Design of donor–acceptor geometry for tuning excited-state polarization: fluorescence solvatochromism of push–pull biphenyls with various torsional restrictions on their aryl–aryl bonds. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.08.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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9
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Niko Y, Cho Y, Kawauchi S, Konishi GI. Pyrene-based D–π–A dyes that exhibit solvatochromism and high fluorescence brightness in apolar solvents and water. RSC Adv 2014. [DOI: 10.1039/c4ra06282e] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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10
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Sasaki S, Niko Y, Igawa K, Konishi GI. Aggregation-induced emission active D-π-A binaphthyl luminophore with dual-mode fluorescence. RSC Adv 2014. [DOI: 10.1039/c4ra05871b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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11
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Flamholc R, Plażuk D, Zakrzewski J, Métivier R, Nakatani K, Makal A, Woźniak K. A new class of pyrenyl solid-state emitters: 1-pyrenyl ynones. Synthesis via the Friedel–Crafts route, molecular and electronic structure and photophysical properties. RSC Adv 2014. [DOI: 10.1039/c4ra03961k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Friedel-Crafts acylation of pyrene with alkynoic acids in the presence of trifluoroacetic anhydride and triflic acid constitutes a direct and efficient route to 1-pyrenyl ynones fluorescent in solution and in the solid state.
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Affiliation(s)
- Rafał Flamholc
- Department of Organic Chemistry
- Faculty of Chemistry
- University of Łódź
- 91-403 Łódź, Poland
| | - Damian Plażuk
- Department of Organic Chemistry
- Faculty of Chemistry
- University of Łódź
- 91-403 Łódź, Poland
| | - Janusz Zakrzewski
- Department of Organic Chemistry
- Faculty of Chemistry
- University of Łódź
- 91-403 Łódź, Poland
| | | | | | - Anna Makal
- Department of Chemistry
- Warsaw University
- 02-093 Warszawa, Poland
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Hachiya S, Asai K, Konishi GI. Environment-responsive multicolor fluorescent dyes based on nitrophenyl or nitrophenylethynyl oligothiophene derivatives: correlation between fluorescence and π-conjugation length. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.03.054] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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13
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Hachiya S, Asai K, Konishi GI. Unique solvent-dependent fluorescence of nitro-group-containing naphthalene derivatives with weak donor–strong acceptor system. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.01.096] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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14
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Niko Y, Kawauchi S, Otsu S, Tokumaru K, Konishi GI. Fluorescence enhancement of pyrene chromophores induced by alkyl groups through σ-π conjugation: systematic synthesis of primary, secondary, and tertiary alkylated pyrenes at the 1, 3, 6, and 8 positions and their photophysical properties. J Org Chem 2013; 78:3196-207. [PMID: 23425392 DOI: 10.1021/jo400128c] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
We have systematically synthesized 1-, 3-, 6-, and 8-alkyl-substituted pyrene derivatives using the latest synthesis methods and investigated the effects of alkyl substitution on the photophysical properties of the pyrene chromophore. Like the trimethylsilyl group, which is known to enhance the fluorescence properties of some chromophores through σ*-π* conjugation, alkyl groups (primary, secondary, and tertiary) enhanced the fluorescence quantum yield of the pyrene chromophore through σ-π conjugation in most cases. While these enhancements in the fluorescence quantum yield were beyond expectations, the results were supported by absolute measurements. These results also indicate that ubiquitous alkyl groups can be used to tune the photophysical properties of the pyrene chromophore, as well as to improve the solubility or prevent aggregation. In other words, they can be used to develop new photofunctional materials.
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Affiliation(s)
- Yosuke Niko
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Tokyo 152-8552, Japan
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