1
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Ikeshita M, Ichinose M, Tsuno T. Luminescent solvent-free liquids based on Schiff-base boron difluoride complexes with polyethylene glycol chains. Soft Matter 2024; 20:2178-2184. [PMID: 38351893 DOI: 10.1039/d3sm01590d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
A series of Schiff-base boron difluoride complexes with polyethylene glycol chains were synthesized and their photophysical properties were examined. These complexes maintained the solvent-free liquid state even at room temperature and their glass transition temperatures (Tg) were determined to be around -40 °C. The complexes showed blue to yellow luminescence under UV irradiation in the solvent-free liquid state with good emission quantum yields (Φ) of up to 0.26. The luminescence colour could also be tuned by dissolving organic dyes in the blue luminescent liquid sample. Density functional theory (DFT) and time-dependent (TD) DFT calculations were performed to further understand the photophysical properties.
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Affiliation(s)
- Masahiro Ikeshita
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Chiba 275-8575, Japan.
| | - Miku Ichinose
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Chiba 275-8575, Japan.
| | - Takashi Tsuno
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Chiba 275-8575, Japan.
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2
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Han AC, Xiao LJ, Zhou QL. Construction of Ge-Stereogenic Center by Desymmetric Carbene Insertion of Dihydrogermanes. J Am Chem Soc 2024; 146:5643-5649. [PMID: 38327018 DOI: 10.1021/jacs.3c14386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
We developed a method for the enantioselective synthesis of germanium-stereogenic compounds by the desymmetric carbene insertion of dihydrogermanes. A chiral rhodium phosphate catalyst decomposes diaryldiazo-methanes to generate rhodium carbenes that insert enantioselectively into one of the two Ge-H bonds of dihydrogermanes to form germanium-stereogenic compounds under mild reaction conditions. By this method, a variety of chiral germanes with germanium-stereogenic centers were synthesized in high yields and excellent enantioselectivities. Kinetic studies of the reaction showed that the diazo decomposition process was the rate-determining step. The remaining Ge-H bond of the chiral germane products provides a possibility for preparing chiral tetra-substituted germanium-stereogenic compounds.
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Affiliation(s)
- Ai-Cui Han
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin 300071, China
| | - Li-Jun Xiao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin 300071, China
| | - Qi-Lin Zhou
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin 300071, China
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3
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Silva MJSA, Zhang Y, Vinck R, Santos FMF, António JPM, Gourdon-Grünewaldt L, Zaouter C, Castonguay A, Patten SA, Cariou K, Boscá F, Nájera F, Arteaga JF, Gasser G, Pischel U, Gois PMP. BASHY Dyes Are Highly Efficient Lipid Droplet-Targeting Photosensitizers that Induce Ferroptosis through Lipid Peroxidation. Bioconjug Chem 2023; 34:2337-2344. [PMID: 37948301 DOI: 10.1021/acs.bioconjchem.3c00449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Ferroptosis is an iron-dependent lipid-peroxidation-driven mechanism of cell death and a promising therapeutic target to eradicate cancer cells. In this study, we discovered that boronic acid-derived salicylidenehydrazone (BASHY) dyes are highly efficient singlet-oxygen photosensitizers (PSs; ΦΔ up to 0.8) that induce ferroptosis triggered by photodynamic therapy. The best-performing BASHY dye displayed a high phototoxicity against the human glioblastoma multiform U87 cell line, with an IC50 value in the low nanomolar range (4.40 nM) and a remarkable phototoxicity index (PI > 22,700). Importantly, BASHY dyes were shown to accumulate in lipid droplets (LDs) and this intracellular partition was found to be essential for the enhanced phototoxicity and the induction of ferroptosis through lipid peroxidation. The safety and phototoxicity of this platform were validated using an in vivo zebrafish model (Danio rerio).
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Affiliation(s)
- Maria J S A Silva
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology, Paris F-75005, France
| | - Yiyi Zhang
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology, Paris F-75005, France
| | - Robin Vinck
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology, Paris F-75005, France
| | - Fábio M F Santos
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal
| | - João P M António
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal
| | - Lisa Gourdon-Grünewaldt
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology, Paris F-75005, France
- INRS - Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval , QuebecH7V 1B7, Canada
| | - Charlotte Zaouter
- INRS - Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval , QuebecH7V 1B7, Canada
| | - Annie Castonguay
- INRS - Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval , QuebecH7V 1B7, Canada
| | - Shunmoogum A Patten
- INRS - Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval , QuebecH7V 1B7, Canada
| | - Kevin Cariou
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology, Paris F-75005, France
| | - Francisco Boscá
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas, Avda. de los Naranjos s/n, Valencia 46022, Spain
| | - Francisco Nájera
- Departamento de Química Orgánica, and Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina - IBIMA, Universidad de Málaga, Campus Teatinos s/n, 29071, Plataforma Bionand, Parque Tecnológico de Andalucía, Málaga 29590, Spain
| | - Jesús F Arteaga
- CIQSO-Centre for Research in Sustainable Chemistry and Department of Chemistry, University of Huelva, Campus de El Carmen s/n, Huelva 21071, Spain
| | - Gilles Gasser
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology, Paris F-75005, France
| | - Uwe Pischel
- CIQSO-Centre for Research in Sustainable Chemistry and Department of Chemistry, University of Huelva, Campus de El Carmen s/n, Huelva 21071, Spain
| | - Pedro M P Gois
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal
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4
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Tanaka K, Gon M, Ito S, Ochi J, Chujo Y. Recent progresses in the mechanistic studies of aggregation-induced emission-active boron complexes and clusters. Coord Chem Rev 2022; 472:214779. [DOI: 10.1016/j.ccr.2022.214779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Ikeshita M, Suzuki T, Matsudaira K, Kitahara M, Imai Y, Tsuno T. Multi-colour circularly polarized luminescence properties of chiral Schiff-base boron difluoride complexes. Phys Chem Chem Phys 2022; 24:15502-15510. [PMID: 35713179 DOI: 10.1039/d2cp01861f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of chiral Schiff-base boron difluoride complexes was synthesized and their photophysical properties were examined. These complexes showed multi-colour (blue, yellow and red) photoluminescence in solution and in the solid state with good emission quantum yield (Φ) depending on the π-systems of the ligands. The chiral complexes exhibited circularly polarized luminescence (CPL) with an absolute luminescence dissymmetry factor (glum) of up to the 1.3 × 10-3 in solution and 1.9 × 10-2 in the drop-cast film state. Density functional theory (DFT) and time-dependent (TD) DFT calculations were conducted to further understand the photophysical properties.
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Affiliation(s)
- Masahiro Ikeshita
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Chiba, 275-8575, Japan.
| | - Takato Suzuki
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Chiba, 275-8575, Japan.
| | - Kana Matsudaira
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University 3-4-1 Kowakae, Higashi-Osaka, Osaka, 577-8502, Japan.
| | - Maho Kitahara
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University 3-4-1 Kowakae, Higashi-Osaka, Osaka, 577-8502, Japan.
| | - Yoshitane Imai
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University 3-4-1 Kowakae, Higashi-Osaka, Osaka, 577-8502, Japan.
| | - Takashi Tsuno
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Chiba, 275-8575, Japan.
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6
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Zhang G, Zhang Z, Hou M, Cai X, Yang K, Yu P, Song Q. Construction of boron-stereogenic compounds via enantioselective Cu-catalyzed desymmetric B-H bond insertion reaction. Nat Commun 2022; 13:2624. [PMID: 35552397 DOI: 10.1038/s41467-022-30287-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 04/21/2022] [Indexed: 01/15/2023] Open
Abstract
Compared with the well-developed carbon-stereogenic chemistry, the construction of boron-stereogenic compounds remains undeveloped and challenging. Herein, the previously elusive catalytic enantioselective construction of boron-stereogenic compounds has been achieved through enantioselective desymmetric B-H bond insertion reaction. The B-H bond insertion reaction of 2-arylpyridine-boranes with versatile diazo compounds under chiral copper catalyst can afford boron-stereogenic compounds with good to excellent enantioselectivity. Moreover, the synthetic utility of this reaction is demonstrated by the scalability and downstream transformations. DFT calculations provide insights into the reaction mechanism and the origin of stereoselectivity.
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7
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Dočekal V, Koberová T, Hrabovský J, Vopálenská A, Gyepes R, Císařová I, Rios R, Veselý J. Stereoselective Cyclopropanation of Boron Dipyrromethene (BODIPY) Derivatives by an Organocascade Reaction. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Vojtěch Dočekal
- Department of Organic Chemistry Faculty of Science Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Tereza Koberová
- Department of Organic Chemistry Faculty of Science Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Jan Hrabovský
- Faculty of Mathematics and Physics Charles University in Prague Prague Czech Republic
- HiLASE Centre Institute of Physics of the Czech Academy of Sciences Dolní Břežany Czech Republic
| | - Andrea Vopálenská
- Department of Organic Chemistry Faculty of Science Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Róbert Gyepes
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry Faculty of Science Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Ramon Rios
- School of Chemistry University of Southampton Highfield Campus SO17 1BJ Southampton UK
| | - Jan Veselý
- Department of Organic Chemistry Faculty of Science Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
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8
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9
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Yoshigoe Y, Hashizume K, Saito S. Synthesis and stereochemistry of chiral aza-boraspirobifluorenes with tetrahedral boron-stereogenic centers. Dalton Trans 2022; 51:17035-17039. [DOI: 10.1039/d2dt03303h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have synthesized chiral aza-boraspirobifluorenes and evaluated their structural and photophysical properties.
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Affiliation(s)
- Yusuke Yoshigoe
- Department of Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
| | - Keiichiro Hashizume
- Department of Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
| | - Shinichi Saito
- Department of Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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10
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Işık M, Dündar E, Sahin E, Tanyeli C. A Boron Dipyrromethene Chiral-at-Boron and Carbon with a Bent Geometry: Synthesis, Resolution and Chiroptical Properties. Chem Commun (Camb) 2022; 58:7188-7191. [DOI: 10.1039/d2cc02179j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a boron dipyrromethene chiral-at-boron and carbon (B*C*-BODIPY) accessible through a two-pot, one-step synthesis—an interrupted Knoevenagel condensation. The ECD spectra of chiral HPLC resolved enantiomers show clear Cotton effects...
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11
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Baldo S, Antunes P, Felicidade JF, Santos FMF, Arteaga JF, Fernandes F, Pischel U, Pinto SN, Gois PMP. The BASHY Platform Enables the Assembly of a Fluorescent Bortezomib-GV1001 Conjugate. ACS Med Chem Lett 2021; 13:128-133. [PMID: 35059132 PMCID: PMC8762740 DOI: 10.1021/acsmedchemlett.1c00615] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 12/22/2021] [Indexed: 01/16/2023] Open
Abstract
In this study, we show that fluorescent boronic-acid derived salicylidenehydrazone complexes (BASHY) can function as fluorescent linkers for bioconjugates that were used to monitor the delivery of the proteasome inhibitor bortezomib (Btz) to HT-29 cancer cells. BASHY complexes were structurally optimized to improve the stability of the complex in buffered conditions (ammonium acetate, pH 7 up to t 1/2 = 40 h), photophysically characterized regarding their fluorescence properties and used in confocal microscopy colocalization studies that revealed their intracellular sequestration by lipid droplets. The accumulation in these hydrophobic organelles limited the hydrolysis of the complex and consequently the drug release, a problem that was circumvented by the conjugation of the BASHY-Btz complex with a cell-penetrating peptide GV1001-C. The conjugate exhibited an improved cytoplasmic availability as confirmed by confocal fluorescence microscopy studies and an improved potency against HT-29 cancer cells (IC50 = 100 nM) as compared to the nontargeted complex (IC50 = 450 nM).
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Affiliation(s)
- Silvia Baldo
- Research
Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal
| | - Patrícia Antunes
- Institute
for Bioengineering and Biosciences (IBB) and Associate Laboratory
i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, Lisbon 1049-001, Portugal,Department
of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon 1049-001, Portugal
| | - João Falcão Felicidade
- Research
Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal
| | - Fábio M. F. Santos
- Research
Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal
| | - Jesús F. Arteaga
- CIQSO-Centre
for Research in Sustainable Chemistry and Department of Chemistry, University of Huelva, Campus de El Carmen s/n, 21071 Huelva, Spain
| | - Fábio Fernandes
- Institute
for Bioengineering and Biosciences (IBB) and Associate Laboratory
i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, Lisbon 1049-001, Portugal,Department
of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon 1049-001, Portugal
| | - Uwe Pischel
- Research
Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal,CIQSO-Centre
for Research in Sustainable Chemistry and Department of Chemistry, University of Huelva, Campus de El Carmen s/n, 21071 Huelva, Spain,U.P.: email,
| | - Sandra N. Pinto
- Institute
for Bioengineering and Biosciences (IBB) and Associate Laboratory
i4HB-Institute for Health and Bioeconomy, Instituto Superior Técnico, Universidade de Lisboa, Lisbon 1049-001, Portugal,Department
of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon 1049-001, Portugal,S.N.P.: email,
| | - Pedro M. P. Gois
- Research
Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Lisboa 1649-003, Portugal,P.M.P.G.: phone, +351 217
946 400 (321); email, ,
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12
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Abstract
The construction of main group heteroatom-stereogenic compounds is of great importance due to their intriguing chemical, physical, biological, and stereoelectronic properties. Despite that organoboron compounds are widely used in organic chemistry, the creation of a tetrahedral boron-stereogenic center in one enantiomeric form remains highly challenging. Given the labile nature of ligands attached to the tetracoordinate boron atom, only a handful of enantioenriched boron-stereogenic compounds have been reported via resolution or a chiral substrate-induced diastereoselective approach. To date catalytic asymmetric synthesis of boron-stereogenic compounds has remained unknown. Here, we demonstrate the first catalytic enantioselective construction of boron-stereogenic compounds via an asymmetric copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction. This enantioselective CuAAC reaction not only gives access to a wide range of novel highly functionalized boron-stereogenic heterocycles in high yields with good to excellent enantioselectivities but also produces optically active terminal alkyne and triazole moieties with various potential application prospects. Further transformation of the chiral tetracoordinate boron compounds delivers several complex heterocyclic entities bearing boron-stereogenic centers without the loss of enantiopurity. Moreover, the X-ray structure, the barrier to racemization, and the HOMO/LUMO gap of selected tetracoordinate boron compounds are investigated. Notably, these novel N,N π-conjugated boron-stereogenic compounds exhibit bright fluorescence. The optical properties, including circular dichroism, quantum yield, and circular polarized luminescence spectroscopies, are examined. These features expand the chemical space of the chiroptical boron-based dye platform, which could have great potential applications in chiral optoelectronic materials.
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Affiliation(s)
- Bing Zu
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150080, China.,Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong518055, China
| | - Yonghong Guo
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong518055, China
| | - Chuan He
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong518055, China
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13
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Dasgupta S, Banerjee S, Das S, Datta A. From fluorogens to fluorophores by elucidation and suppression of ultrafast excited state processes of a Schiff base. Phys Chem Chem Phys 2021; 23:19494-19502. [PMID: 34524318 DOI: 10.1039/d1cp02540f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Strategies have been explored for developing strongly fluorescent species out of a weakly fluorescent Schiff base, 2-(((pyridin-2-ylmethyl)imino)methyl)phenol (salampy). The locally excited enolic state of salampy undergoes an intramolecular proton transfer with a time constant of ca. 200 fs. The emissive cis keto state thus formed decays completely within 50 ps. Its fast decay and miniscule fluorescence quantum yield are attributed to efficient non-radiative channels associated with conformational relaxation. The anionic form, salampy-, has a significantly longer fluorescence lifetime of 800 ps. Its emissive state evolves in tens of picoseconds, from the locally excited state, by solvent and conformational relaxation. Both the neutral and anionic forms have a fluorescence lifetime of about 6 ns at 77 K, a temperature at which all activated nonradiative channels are blocked. This lifetime is similar to that obtained at room temperature, upon rigidification of the anion by complexation with Zn2+. Two such complexes have been studied. The first is binuclear, with acetate bridge between the two Zn2+ ions. The second, with ClO4- as the counterion, is mononuclear with two salampy ligands ligating the metal ion. Unlike a previous report on a different Schiff base, in which the ligands are π-stacked in its dimeric Zn2+ complex, no additional nonradiative deactivation pathway opens up in the Zn complexes of salampy, which are devoid of such stacking. The complex of salampy with Al3+ has an even longer fluorescence lifetime of 9 ns, indicating a greater degree of rigidification and consequent suppression of nonradiative processes.
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Affiliation(s)
- Souradip Dasgupta
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India.
| | - Shrobona Banerjee
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal Bypass Rd, Bhauri, Madhya Pradesh 462066, India
| | - Sharmistha Das
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India.
| | - Anindya Datta
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India.
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14
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Dasgupta S, Chowdhury A, Datta A. Time evolution of the solvated and conformationally relaxed emissive excited state of the anionic form of salophen, a Schiff base. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Macé A, Hamrouni K, Gauthier ES, Jean M, Vanthuyne N, Frédéric L, Pieters G, Caytan E, Roisnel T, Aloui F, Srebro-Hooper M, Carboni B, Berrée F, Crassous J. Circularly Polarized Fluorescent Helicene-Boranils: Synthesis, Photophysical and Chiroptical Properties. Chemistry 2021; 27:7959-7967. [PMID: 33769616 DOI: 10.1002/chem.202100356] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Indexed: 01/26/2023]
Abstract
Mono- and di-boranil-substituted helicenes were prepared by BF2 -borylation of the corresponding anils, readily synthesized by condensation of 2-amino- and 2,15-diamino-helicenes with 4-(diethylamino)salicylaldehyde. After enantiomeric resolution using HPLC, their chiroptical properties including circularly polarized fluorescence in solution and in PMMA films were investigated and rationalized with the help of NMR, X-ray and quantum-chemical calculations.
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Affiliation(s)
- Aurélie Macé
- Univ Rennes, CNRS, ISCR-UMR 6226, Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France
| | - Khaoula Hamrouni
- Univ Rennes, CNRS, ISCR-UMR 6226, Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France.,University of Monastir, Faculty of Sciences, Laboratory of Asymmetric Synthesis and Molecular Engineering of Materials for Organic Electronics (LR18ES19), Avenue of Environment, 5019, Monastir, Tunisia
| | - Etienne S Gauthier
- Univ Rennes, CNRS, ISCR-UMR 6226, Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France
| | - Marion Jean
- Aix Marseille University, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Nicolas Vanthuyne
- Aix Marseille University, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Lucas Frédéric
- Université Paris-Saclay, CEA, Département Médicaments et Technologies pour la Santé (DMTS), SCBM, Gif-sur-Yvette, 91191, France
| | - Grégory Pieters
- Université Paris-Saclay, CEA, Département Médicaments et Technologies pour la Santé (DMTS), SCBM, Gif-sur-Yvette, 91191, France
| | - Elsa Caytan
- Univ Rennes, CNRS, ISCR-UMR 6226, Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France
| | - Thierry Roisnel
- Univ Rennes, CNRS, ISCR-UMR 6226, Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France
| | - Faouzi Aloui
- University of Monastir, Faculty of Sciences, Laboratory of Asymmetric Synthesis and Molecular Engineering of Materials for Organic Electronics (LR18ES19), Avenue of Environment, 5019, Monastir, Tunisia
| | - Monika Srebro-Hooper
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Krakow, Poland
| | - Bertrand Carboni
- Univ Rennes, CNRS, ISCR-UMR 6226, Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France
| | - Fabienne Berrée
- Univ Rennes, CNRS, ISCR-UMR 6226, Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France
| | - Jeanne Crassous
- Univ Rennes, CNRS, ISCR-UMR 6226, Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France
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16
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Hoshi K, Itaya M, Tahara K, Matsumoto A, Tabata A, Nagamune H, Yoshida Y, Hase E, Minamikawa T, Yasui T, Katayama T, Furube A, Minagawa K, Imada Y, Yagishita F. Two-photon excitable boron complex based on tridentate imidazo[1,5- a]pyridine ligand for heavy-atom-free mitochondria-targeted photodynamic therapy. RSC Adv 2021; 11:26403-26407. [PMID: 35479440 PMCID: PMC9037477 DOI: 10.1039/d1ra05059a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 07/22/2021] [Indexed: 01/20/2023] Open
Abstract
We have synthesized a cyan fluorescent boron complex based on a tridentate imidazo[1,5-a]pyridine ligand. The boron complex was found to have potential applications as not only a chiroptical material but also a heavy-atom-free mitochondria-targeted photosensitizer for cancer treatment. We have synthesized a cyan fluorescent boron complex based on a tridentate imidazo[1,5-a]pyridine ligand.![]()
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17
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Abstract
A family of iminoboronates was prepared through a one-pot multicomponent reaction, starting from boronic acid, anthranilic acid, and different salicylaldehydes. Their synthesis was straightforward and the complexes were obtained in good to excellent yields. Their photophysical properties were assessed in a diluted solution, and the complexes proved to be faintly luminescent. These chelates demonstrated remarkable Aggregation-Induced Emission Enhancement, which was rationalized using crystal structures.
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Affiliation(s)
- Samuel Guieu
- LAQV/REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
| | - Cátia I. C. Esteves
- LAQV/REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
| | - João Rocha
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
| | - Artur M. S. Silva
- LAQV/REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
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18
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Ohtani S, Takeda Y, Gon M, Tanaka K, Chujo Y. Facile strategy for obtaining luminescent polymorphs based on the chirality of a boron-fused azomethine complex. Chem Commun (Camb) 2020; 56:15305-15308. [PMID: 33216068 DOI: 10.1039/d0cc06383e] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A chloro-substituted boron-fused azomethine complex (BAmCl) having a stereogenic boron center was synthesized for obtaining a luminescent chiral crystal. We succeeded in isolating the (R)- and (S)-enantiomers of BAmCl and preparing the homochiral polymorphic crystal, while we obtained the racemic crystal with rac-BAmCl. Single crystal X-ray diffraction analyses suggest that a variety of intermolecular interaction patterns and intrinsic flexibility of the molecular framework should play a significant role in stabilizing the homochiral crystal. We found the difference in molecular arrangements between the racemic and the homochiral crystals, and we observed distinctly different emission colors. In particular, we observed heat-initiated homogeneous racemization without the need for a solvent or catalyst in the molten state of the homochiral crystal (R)-BAmCl. Our results mean that chiral resolution of a flexible fused-skeleton having a stereogenic boron center can be a platform for creating luminescent polymorphic materials.
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Affiliation(s)
- Shunsuke Ohtani
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
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19
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Fu K, Jin X, Zhou M, Ma K, Duan P, Yu ZQ. Amplifying the excited state chirality through self-assembly and subsequent enhancement via plasmonic silver nanowires. Nanoscale 2020; 12:19760-19767. [PMID: 32966503 DOI: 10.1039/d0nr04510a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The development of circularly polarized luminescent materials with a large luminescence dissymmetry factor (glum) is continuing to be a big challenge. Here, we present a general approach for amplifying circular polarization of circularly polarized luminescence (CPL) through intergrating molecular self-assembly and surface plasmon resonance (SPR). Molecular self-assembly could amplify the CPL performance. Subsequently, the composites built of nanoassemblies and achiral silver nanowires (AgNWs) show intense CPL activity with an amplified glum value. By applying an external magnetic field, the CPL activity of the nanoassemblies/AgNWs composites has been significantly enhanced, confirming a plasmon-enhanced circular polarization. Our design strategy based on SPR-enhanced circular polarization of the chiral emissive systems suggests that combining plasmonic nanomaterials with chiral organic materials could aid in the development of novel CPL active nanomaterials.
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Affiliation(s)
- Kuo Fu
- College of Chemistry and Environmental Engineering, Low dimensional Materials, Genome Initiative Shenzhen University, 1066 Xueyuan Avenue, Nanshan, Shenzhen, 518055, P.R. China. and CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), No. 11 ZhongGuanCun BeiYiTiao, Beijing 100190, P. R. China.
| | - Xue Jin
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), No. 11 ZhongGuanCun BeiYiTiao, Beijing 100190, P. R. China.
| | - Minghao Zhou
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), No. 11 ZhongGuanCun BeiYiTiao, Beijing 100190, P. R. China.
| | - Kai Ma
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), No. 11 ZhongGuanCun BeiYiTiao, Beijing 100190, P. R. China.
| | - Pengfei Duan
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), No. 11 ZhongGuanCun BeiYiTiao, Beijing 100190, P. R. China.
| | - Zhen-Qiang Yu
- College of Chemistry and Environmental Engineering, Low dimensional Materials, Genome Initiative Shenzhen University, 1066 Xueyuan Avenue, Nanshan, Shenzhen, 518055, P.R. China.
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20
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Domínguez Z, Pais VF, Collado D, Vázquez-Domínguez P, Albendín FN, Pérez-Inestrosa E, Ros A, Pischel U. π-Extended Four-Coordinate Organoboron N,C-Chelates as Two-Photon Absorbing Chromophores. J Org Chem 2019; 84:13384-13393. [PMID: 31523970 DOI: 10.1021/acs.joc.9b01542] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Four-coordinate N,C-chelate organoboron dyes with alkynyl spacers were synthesized by Heck alkynylation. These dyes are π-extended analogues of the recently reported class of four-coordinate borylated arylisoquinolines (BAI). Depending on the electron-donor substitution, they feature an intramolecular charge-transfer (ICT) character in the excited state. This translates into pronounced apparent Stokes shifts (up to 8500 cm-1) and a solvatofluorochromic behavior. In general, the observed emission quantum yields are high in nonpolar media (ΦF ca. 0.5-0.6). For the dye with the most pronounced ICT rather high emission quantum yields (ΦF ca. 0.4) are observed for emissions with maxima longer than 600 nm in solvents of moderate polarity. The π-extended dyes show interesting two-photon absorption (TPA) properties, maintaining high cross sections (up to 60 GM) in the near-infrared wavelength window (>900 nm). One of the dyes was designed as dimeric chromophore, integrating the acceptor-π-acceptor (A-π-A) format. This alternative design showed no ICT behavior but led to the observation of high two-photon-absorption (TPA) cross sections (ca. 220 GM at 700 nm). All investigated dyes show pronounced photostability, providing added value to this structural and photofunctional extension of the BAI dye platform.
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Affiliation(s)
- Zoe Domínguez
- CIQSO - Center for Research in Sustainable Chemistry and Department of Chemistry , University of Huelva , Campus de El Carmen s/n , 21071 Huelva , Spain
| | - Vânia F Pais
- CIQSO - Center for Research in Sustainable Chemistry and Department of Chemistry , University of Huelva , Campus de El Carmen s/n , 21071 Huelva , Spain
| | - Daniel Collado
- Department of Organic Chemistry , University of Malaga, IBIMA , Campus Teatinos s/n , 29071 Málaga , Spain.,Andalusian Center for Nanomedicine and Biotechnology, BIONAND, Parque Tecnológico de Andalucía , 29590 Málaga , Spain
| | - Pablo Vázquez-Domínguez
- Institute for Chemical Research (CSIC-US) and Innovation-Center in Advanced Chemistry (ORFEO-CINQA) , C/Américo Vespucio 49 , 41092 Seville , Spain.,Department of Organic Chemistry , University of Seville , C/Prof. García González 1 , 41012 Seville , Spain
| | - Francisco Nájera Albendín
- Department of Organic Chemistry , University of Malaga, IBIMA , Campus Teatinos s/n , 29071 Málaga , Spain.,Andalusian Center for Nanomedicine and Biotechnology, BIONAND, Parque Tecnológico de Andalucía , 29590 Málaga , Spain
| | - Ezequiel Pérez-Inestrosa
- Department of Organic Chemistry , University of Malaga, IBIMA , Campus Teatinos s/n , 29071 Málaga , Spain.,Andalusian Center for Nanomedicine and Biotechnology, BIONAND, Parque Tecnológico de Andalucía , 29590 Málaga , Spain
| | - Abel Ros
- Institute for Chemical Research (CSIC-US) and Innovation-Center in Advanced Chemistry (ORFEO-CINQA) , C/Américo Vespucio 49 , 41092 Seville , Spain.,Department of Organic Chemistry , University of Seville , C/Prof. García González 1 , 41012 Seville , Spain
| | - Uwe Pischel
- CIQSO - Center for Research in Sustainable Chemistry and Department of Chemistry , University of Huelva , Campus de El Carmen s/n , 21071 Huelva , Spain
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21
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Affiliation(s)
- Shunsuke Ohtani
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - 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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22
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António JPM, Russo R, Carvalho CP, Cal PMSD, Gois PMP. Boronic acids as building blocks for the construction of therapeutically useful bioconjugates. Chem Soc Rev 2019; 48:3513-3536. [DOI: 10.1039/c9cs00184k] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This review summarizes boronic acid's contribution to the development of bioconjugates with a particular focus on the molecular mechanisms underlying its role in the construction and function of the bioconjugate, namely as a bioconjugation warhead, as a payload and as part of a bioconjugate linker.
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Affiliation(s)
- João P. M. António
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- Lisbon
- Portugal
| | - Roberto Russo
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- Lisbon
- Portugal
| | - Cátia Parente Carvalho
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- Lisbon
- Portugal
| | - Pedro M. S. D. Cal
- Instituto de Medicina Molecular
- Faculty of Medicine
- Universidade de Lisboa
- Lisbon
- Portugal
| | - Pedro M. P. Gois
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- Lisbon
- Portugal
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