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Parra-Cadenas B, Bravo I, Ripoll Lorente MC, Ginés C, Elorriaga D, Carrillo-Hermosilla F. Boron Complexes with Propiolamidinato Ligands: Synthesis, Structure, and Photophysical Properties. Inorg Chem 2024; 63:12120-12132. [PMID: 38873888 PMCID: PMC11220760 DOI: 10.1021/acs.inorgchem.4c01241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 06/04/2024] [Accepted: 06/10/2024] [Indexed: 06/15/2024]
Abstract
Two series of boron derivatives with propiolamidinato ligands, [BPh2{C(C≡CAr)(NR)2}] (Ar = Ph, p-MeOPh, p-FPh, p-Me2NPh, or phen; R = iPr or p-tolyl), were synthesized and structurally characterized. The corresponding propiolamidine (or propargylamidine) proligands have been obtained through sustainable methods. One is the catalytic hydroalkynylation of diisopropylcarbodiimide with different terminal alkynes, using simple ZnEt2 as a precatalyst. Alternatively, to obtain propiolamidines with aromatic groups on the nitrogen atoms, the formation of lithiated derivatives of terminal alkynes by reaction with n-BuLi in air and at room temperature, and subsequent addition to the di-p-tolylcarbodiimide, under the same conditions and using 2-MeTHF as a sustainable solvent, has been used for the first time. After reaction with BPh3, the corresponding boron amidinates were obtained, which are emissive in the solution state. The influence of the different substituents introduced into the ligands on the photophysical properties of the boron compounds has been studied. One of the obtained compounds can be used as a ratiometric fluorescent pH sensor in the acidic range.
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Affiliation(s)
- Blanca Parra-Cadenas
- Departamento
de Química Inorgánica, Orgánica y Bioquímica-Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Facultad
de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - Iván Bravo
- Grupo
FOTOAIR, Unidad nanoDrug, Departamento de Química-Física,
Facultad de Farmacia de Albacete, Universidad
de Castilla-La Mancha, 02008 Albacete, Spain
| | - M. Consuelo Ripoll Lorente
- Grupo
FOTOAIR, Unidad nanoDrug, Departamento de Química-Física,
Facultad de Farmacia de Albacete, Universidad
de Castilla-La Mancha, 02008 Albacete, Spain
| | - Carlos Ginés
- Departamento
de Química Inorgánica, Orgánica y Bioquímica-Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Facultad
de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - David Elorriaga
- Departamento
de Química Orgánica e Inorgánica, Universidad de Oviedo, Julián Clavería 8, 33006 Oviedo, Spain
| | - Fernando Carrillo-Hermosilla
- Departamento
de Química Inorgánica, Orgánica y Bioquímica-Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Facultad
de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
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2
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Vidal F, Smith S, Williams CK. Ring Opening Copolymerization of Boron-Containing Anhydride with Epoxides as a Controlled Platform to Functional Polyesters. J Am Chem Soc 2023. [PMID: 37311063 DOI: 10.1021/jacs.3c03261] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Boron-functionalized polymers are used in opto-electronics, biology, and medicine. Methods to produce boron-functionalized and degradable polyesters remain exceedingly rare but relevant where (bio)dissipation is required, for example, in self-assembled nanostructures, dynamic polymer networks, and bio-imaging. Here, a boronic ester-phthalic anhydride and various epoxides (cyclohexene oxide, vinyl-cyclohexene oxide, propene oxide, allyl glycidyl ether) undergo controlled ring-opening copolymerization (ROCOP), catalyzed by organometallic complexes [Zn(II)Mg(II) or Al(III)K(I)] or a phosphazene organobase. The polymerizations are well controlled allowing for the modulation of the polyester structures (e.g., by epoxide selection, AB, or ABA blocks), molar masses (9.4 < Mn < 40 kg/mol), and uptake of boron functionalities (esters, acids, "ates", boroxines, and fluorescent groups) in the polymer. The boronic ester-functionalized polymers are amorphous, with high glass transition temperatures (81 < Tg < 224 °C) and good thermal stability (285 < Td < 322 °C). The boronic ester-polyesters are deprotected to yield boronic acid- and borate-polyesters; the ionic polymers are water soluble and degradable under alkaline conditions. Using a hydrophilic macro-initiator in alternating epoxide/anhydride ROCOP, and lactone ring opening polymerization, produces amphiphilic AB and ABC copolyesters. Alternatively, the boron-functionalities are subjected to Pd(II)-catalyzed cross-couplings to install fluorescent groups (BODIPY). The utility of this new monomer as a platform to construct specialized polyesters materials is exemplified here in the synthesis of fluorescent spherical nanoparticles that self-assemble in water (Dh = 40 nm). The selective copolymerization, variable structural composition, and adjustable boron loading represent a versatile technology for future explorations of degradable, well-defined, and functional polymers.
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Affiliation(s)
- Fernando Vidal
- Department of Chemistry, Chemical Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Sevven Smith
- Department of Chemistry, Chemical Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Charlotte K Williams
- Department of Chemistry, Chemical Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
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3
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Gurubasavaraj PM, Sajjan VP, Muñoz-Flores BM, Jiménez Pérez VM, Hosmane NS. Recent Advances in BODIPY Compounds: Synthetic Methods, Optical and Nonlinear Optical Properties, and Their Medical Applications. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27061877. [PMID: 35335243 PMCID: PMC8949266 DOI: 10.3390/molecules27061877] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 02/26/2022] [Accepted: 03/09/2022] [Indexed: 11/25/2022]
Abstract
Organoboron compounds are attracting immense research interest due to their wide range of applications. Particularly, low-coordinate organoboron complexes are receiving more attention due to their improbable optical and nonlinear optical properties, which makes them better candidates for medical applications. In this review, we summarize the various synthetic methods including multicomponent reactions, microwave-assisted and traditional pathways of organoboron complexes, and their optical and nonlinear properties. This review also includes the usage of organoboron complexes in various fields including biomedical applications.
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Affiliation(s)
- Prabhuodeyara M. Gurubasavaraj
- Department of Chemistry, Rani Channamma University, Belagavi 591156, India;
- Correspondence: (P.M.G.); (V.M.J.P.); (N.S.H.)
| | | | - Blanca M. Muñoz-Flores
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza 66451, Nuevo León, Mexico;
| | - Víctor M. Jiménez Pérez
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza 66451, Nuevo León, Mexico;
- Correspondence: (P.M.G.); (V.M.J.P.); (N.S.H.)
| | - Narayan S. Hosmane
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL 60115, USA
- Correspondence: (P.M.G.); (V.M.J.P.); (N.S.H.)
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4
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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] [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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5
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Milošević MD, Marinković AD, Petrović P, Klaus A, Nikolić MG, Prlainović NŽ, Cvijetić IN. Synthesis, characterization and SAR studies of bis(imino)pyridines as antioxidants, acetylcholinesterase inhibitors and antimicrobial agents. Bioorg Chem 2020; 102:104073. [PMID: 32693308 DOI: 10.1016/j.bioorg.2020.104073] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 05/02/2020] [Accepted: 06/30/2020] [Indexed: 12/17/2022]
Abstract
In this study we synthesized a series of sixteen bis(imino)pyridines (BIPs) starting from 2,6-diaminopyridine and various aromatic aldehydes, and evaluated their antioxidant, antibacterial, antifungal and acetylcholinesterase (AChE) inhibitory activity. The chemical structures were elucidated by FTIR, elemental analysis, ESR and HRMS. 1H and 13C NMR spectra couldn't be acquired due to the formation of stable, carbon-centered radical cations in a solution, as confirmed by ESR spectroscopy and DFT calculations. The in vitro antioxidant potency was evaluated using four assays: free radical scavenging activity (DPPH and ABTS), reducing power and total antioxidant capacity assay. BIPs demonstrated excellent antioxidant properties, and two derivatives proved to be more potent than reference antioxidants (ascorbic acid and Trolox) in all assays. DFT calculations on ωB97XD/6-311++g(d,p) level of theory provided valuable insights into the radical scavenging mechanism of BIPs. For hydroxyl-substituted BIPs, hydrogen atom transfer (HAT) is a predominant mechanism, while the single electron transfer coupled with proton transfer (SET-PT) governs the antioxidant activity of other derivatives. Intramolecular hydrogen bonding (IHB) plays an important role in the mechanism of antioxidant activity as revealed by noncovalent interaction analysis and rotational barrier calculations. The spin density of radical cations is localized on carbon atoms of a pyridine ring, which corroborates with g-factors and multiplicity obtained from ESR analysis. The most potent BIP exhibited moderate inhibitory activity toward AChE (IC50 = 20 ± 4 μM), while molecular docking suggested binding at the peripheral anionic site of AChE with the MMFF94 binding enthalpy of -43.4 kcal/mol. Moderate in vitro antimicrobial activity of BIPs have been determined against several pathogenic bacterial strains: Pseudomonas aeruginosa, Escherichia coli, Enterococcus faecalis, Staphylococcus aureus and clinical isolate of methicillin resistant S. aureus (MRSA). The antifungal activity of BIPs toward Candida albicans was also confirmed. The similarity ensemble approach combined with molecular docking suggested leucyl aminopeptidase as the probable antimicrobial target for the three most potent BIP derivatives.
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Affiliation(s)
- Milena D Milošević
- SI Institute of Chemistry, Technology and Metallurgy, National Institute, Department of Ecology and Techoeconomic, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia
| | - Aleksandar D Marinković
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Predrag Petrović
- Innovation Centre of Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Anita Klaus
- Department for Industrial Microbiology, Institute for Food Technology and Biochemistry, University of Belgrade-Faculty of Agriculture, Nemanjina 6, 11080 Belgrade, Serbia
| | - Milica G Nikolić
- Faculty of Sciences and Mathematics, Department of Chemistry, University of Niš, Višegradska 33, 18000 Niš, Serbia
| | - Nevena Ž Prlainović
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Ilija N Cvijetić
- Innovation Center of the Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia.
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6
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Symmetric Fluoroborate and its Boron Modification: Crystal and Electronic Structures. CRYSTALS 2019. [DOI: 10.3390/cryst9120662] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Four boron-carrying molecules were synthesized and purified. These were found to be (a) relatively neutral with respect to the parent BF derivative and (b) functionalized by donor–acceptor groups resulting in a charge transfer within the molecule. The study discusses the steric effect and the influence of the substitution of the side rings on the surroundings of the boron atom. Electronic structures were characterized by real-space bonding indicators. Hirshfeld surface and energy frameworks tools were applied to examine the crystal packing features.
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7
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Organoboron Schiff bases as cell-staining fluorescent probes: Synthesis, Chemio-photophysical characterization, DFT, and X-ray structures. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4718] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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8
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Potopnyk MA, Lytvyn R, Danyliv Y, Ceborska M, Bezvikonnyi O, Volyniuk D, Gražulevičius JV. N,O π-Conjugated 4-Substituted 1,3-Thiazole BF 2 Complexes: Synthesis and Photophysical Properties. J Org Chem 2018; 83:1095-1105. [PMID: 29300092 DOI: 10.1021/acs.joc.7b02239] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A series of 1,3-thiazole-based organoboron complexes has been designed and synthesized by acylation of 2-amino 4-subsituted 1,3-thiazoles with (4-dimethylamino)benzoyl chloride and the subsequent BF2 complexation reaction. The influence of substituents in position 4 of the thiazole ring on photophysical properties of the complexes has been investigated. Synthesized thiazolo[3,2-c][1,3,5,2]oxadiazaborinines mainly showed intensive fluorescence in solutions. Complex with a 4,5-unsubstituted thiazole unit demonstrated an aggregation induced emission (AIE) effect and a very high fluorescent quantum yield (94%) in the solid state because of the inhibition of π-π/π-n interactions in the molecular packing.
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Affiliation(s)
- Mykhaylo A Potopnyk
- Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Roman Lytvyn
- Department of Polymer Chemistry and Technology, Kaunas University of Technology , Radvilenu pl. 19, LT-50254 Kaunas, Lithuania.,Department of Organic Chemistry, Ivan Franko National University of Lviv , Kyryla and Mefodia St. 6, 79005 Lviv, Ukraine
| | - Yan Danyliv
- Department of Polymer Chemistry and Technology, Kaunas University of Technology , Radvilenu pl. 19, LT-50254 Kaunas, Lithuania
| | - Magdalena Ceborska
- Institute of Physical Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Oleksandr Bezvikonnyi
- Department of Polymer Chemistry and Technology, Kaunas University of Technology , Radvilenu pl. 19, LT-50254 Kaunas, Lithuania
| | - Dmytro Volyniuk
- Department of Polymer Chemistry and Technology, Kaunas University of Technology , Radvilenu pl. 19, LT-50254 Kaunas, Lithuania
| | - Juozas Vidas Gražulevičius
- Department of Polymer Chemistry and Technology, Kaunas University of Technology , Radvilenu pl. 19, LT-50254 Kaunas, Lithuania
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9
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Mi W, Qu Z, Sun J, Zhang F, Zhai L, Zhao J, Ye K. Pyrimidine-containing β-iminoenolate difluoroboron complexes acting as non-traditional π-gelators and mechanofluorochromic dyes. NEW J CHEM 2018. [DOI: 10.1039/c8nj01508b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A xerogel-based film based on a mechanofluorochromic dye of a β-iminoenolate difluoroboron complex could detect TFA vapor with high performance.
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Affiliation(s)
- Wenhua Mi
- Sate Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- P. R. China
| | - Zhiyu Qu
- Sate Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- P. R. China
| | - Jingbo Sun
- Sate Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- P. R. China
| | - Fushuang Zhang
- Sate Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- P. R. China
| | - Lu Zhai
- Sate Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- P. R. China
| | - Jinyu Zhao
- Sate Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- P. R. China
| | - Kaiqi Ye
- Sate Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- P. R. China
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10
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Bonacorso HG, Calheiro TP, Iglesias BA, Acunha TV, Franceschini SZ, Ketzer A, Meyer AR, Rodrigues LV, Nogara PA, Rocha JBT, Zanatta N, Martins MAP. 1,1-Difluoro-3-aryl(heteroaryl)-1H-pyrido[1,2-c][1,3,5,2]oxadiazaborinin-9-ium-1-uides: synthesis; structure; and photophysical, electrochemical, and BSA-binding studies. NEW J CHEM 2018. [DOI: 10.1039/c7nj04032f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
New fluorinated pyridine-based boron heterocycles were easily prepared and fully characterized.
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11
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ÇETİN TELLİ F, ASTLEY ST, SALMAN AY. Synthesis, characterization, and antimicrobial activities of novel monosaccharide-containing Schiff base ligands. Turk J Chem 2017. [DOI: 10.3906/kim-1606-76] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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12
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Kubota Y, Tsukamoto M, Ohnishi K, Jin J, Funabiki K, Matsui M. Synthesis and fluorescence properties of novel squarylium–boron complexes. Org Chem Front 2017. [DOI: 10.1039/c7qo00225d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Novel squarylium–boron complexes showed a significantly enhanced fluorescence quantum yield compared to the corresponding uncomplexed squarylium dyes.
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Affiliation(s)
- Yasuhiro Kubota
- Department of Chemistry and Biomolecular Science
- Faculty of Engineering
- Gifu University
- Gifu 501-1193
- Japan
| | - Masahiro Tsukamoto
- Department of Chemistry and Biomolecular Science
- Faculty of Engineering
- Gifu University
- Gifu 501-1193
- Japan
| | - Katsuhiro Ohnishi
- Department of Chemistry and Biomolecular Science
- Faculty of Engineering
- Gifu University
- Gifu 501-1193
- Japan
| | - Jiye Jin
- Department of Chemistry
- Faculty of Science
- Shinshu University
- Matsumoto
- Japan
| | - Kazumasa Funabiki
- Department of Chemistry and Biomolecular Science
- Faculty of Engineering
- Gifu University
- Gifu 501-1193
- Japan
| | - Masaki Matsui
- Department of Chemistry and Biomolecular Science
- Faculty of Engineering
- Gifu University
- Gifu 501-1193
- Japan
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13
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Holtrichter-Rößmann T, Häger I, Daniliuc CG, Fröhlich R, Bergander K, Troll C, Rieger B, Rojas RS, Würthwein EU. Catalytically Active N-Acylamidine–Zirconium Complexes: Synthesis, Structures, and Application in Ethylene Polymerization. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00240] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thorsten Holtrichter-Rößmann
- Organisch-Chemisches
Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
- Chemtura Organometallics GmbH, Ernst Schering Straße 14, D-59192 Bergkamen, Germany
| | - Ina Häger
- Organisch-Chemisches
Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | | | - Roland Fröhlich
- Organisch-Chemisches
Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Klaus Bergander
- Organisch-Chemisches
Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Carsten Troll
- WACKER-Lehrstuhl
für Makromolekulare Chemie, Technische Universität München, Lichtenbergstraße 4, D-85747 Garching, Germany
| | - Bernhard Rieger
- WACKER-Lehrstuhl
für Makromolekulare Chemie, Technische Universität München, Lichtenbergstraße 4, D-85747 Garching, Germany
| | - René S. Rojas
- Departamento
de Química Inorgánica, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Santiago-22, Chile
| | - Ernst-Ulrich Würthwein
- Organisch-Chemisches
Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
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14
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Grabarz AM, Laurent AD, Jędrzejewska B, Zakrzewska A, Jacquemin D, Ośmiałowski B. The Influence of the π-Conjugated Spacer on Photophysical Properties of Difluoroboranyls Derived from Amides Carrying a Donor Group. J Org Chem 2016; 81:2280-92. [PMID: 26894766 DOI: 10.1021/acs.joc.5b02691] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of difluoroboranyls derived from amides carrying a variable π-conjugated spacer between the electron-donating (D) and electron-accepting (A) groups was synthesized and characterized with (1)H, (11)B, (13)C, (15)N, and (19)F NMR, electronic absorption, fluorescence spectroscopies, and first-principle calculations. The D-to-A distance in the series varied from 1.5 to 4.5 Å, causing bathochromic shifts of both the absorption and fluorescence maxima by more than 120 and 213 nm, respectively. These trends are rationalized by quantum-mechanical calculations that allow for quantification of the charge-transfer distance. Theoretical calculations were also performed to determine the vibronic couplings and thus to reproduce the experimental band shapes.
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Affiliation(s)
- Anna Maria Grabarz
- Faculty of Chemistry, Wrocław University of Technology , Wyb. Wyspiańskiego 27, PL-50370 Wrocław, Poland
| | - Adèle D Laurent
- Laboratoire CEISAM, UMR CNRS 6230, Université de Nantes , 2 Rue de la Houssinière, BP92208, 44322 Cedex 3 Nantes, France
| | - Beata Jędrzejewska
- Faculty of Chemical Technology and Engineering, UTP University of Science and Technology , Seminaryjna 3, PL-85326 Bydgoszcz, Poland
| | - Anna Zakrzewska
- Faculty of Chemical Technology and Engineering, UTP University of Science and Technology , Seminaryjna 3, PL-85326 Bydgoszcz, Poland
| | - Denis Jacquemin
- Laboratoire CEISAM, UMR CNRS 6230, Université de Nantes , 2 Rue de la Houssinière, BP92208, 44322 Cedex 3 Nantes, France
| | - Borys Ośmiałowski
- Faculty of Chemical Technology and Engineering, UTP University of Science and Technology , Seminaryjna 3, PL-85326 Bydgoszcz, Poland
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15
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Kubota Y, Kasatani K, Niwa T, Sato H, Funabiki K, Matsui M. Synthesis and Fluorescence Properties of Pyrimidine-Based Diboron Complexes with Donor-π-Acceptor Structures. Chemistry 2015; 22:1816-24. [DOI: 10.1002/chem.201503625] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Indexed: 12/20/2022]
Affiliation(s)
- Yasuhiro Kubota
- Department of Chemistry and Biomolecular Science; Faculty of Engineering; Gifu University; 1-1 Yanagido Gifu 501-1193 Japan
| | - Kouhei Kasatani
- Department of Chemistry and Biomolecular Science; Faculty of Engineering; Gifu University; 1-1 Yanagido Gifu 501-1193 Japan
| | - Takahiro Niwa
- Department of Chemistry and Biomolecular Science; Faculty of Engineering; Gifu University; 1-1 Yanagido Gifu 501-1193 Japan
| | - Hiroyasu Sato
- Applied Technology Center; Rigaku Corporation; 3-9-12 Matsubara-Cho Akishima, Tokyo 196-8666 Japan
| | - Kazumasa Funabiki
- Department of Chemistry and Biomolecular Science; Faculty of Engineering; Gifu University; 1-1 Yanagido Gifu 501-1193 Japan
| | - Masaki Matsui
- Department of Chemistry and Biomolecular Science; Faculty of Engineering; Gifu University; 1-1 Yanagido Gifu 501-1193 Japan
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16
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Kubota Y, Kasatani K, Takai H, Funabiki K, Matsui M. Strategy to enhance solid-state fluorescence and aggregation-induced emission enhancement effect in pyrimidine boron complexes. Dalton Trans 2015; 44:3326-41. [PMID: 25599172 DOI: 10.1039/c4dt03318c] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The synthesis and the solution/solid-state fluorescence properties of pyrimidine-based monoboron complexes differing in terms of the substituents [either two fluorine atoms (BF2 complex) or two phenyl groups (BPh2 complex)] on the boron atom are reported herein. Unrestricted C-Ar intramolecular rotation in the non-, trifluoromethyl-, and cyano-substituted derivatives resulted in negligible fluorescence in solution. On the other hand, methoxy- and dimethylamino-substituted analogues caused the restriction of the C-Ar intramolecular rotation and consequently resulted in relatively strong fluorescence in solution. The non-, trifluoromethyl-, and cyano-substituted derivatives showed a pronounced aggregation-induced emission enhancement effect. Dimethylamino-substituted derivatives exhibited solvatochromism in the fluorescence spectra. Substitution with BPh2 effectively enhanced the fluorescence quantum yield compared to the corresponding BF2 complexes in the solid-state.
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Affiliation(s)
- Yasuhiro Kubota
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
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17
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Zhang RZ, Feng X, Liu Y, Wang SQ, Liu JT, Zhao BX. Synthesis of novel boron chelate complexes and proposed mechanism of new rearrangement. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 139:165-170. [PMID: 25561295 DOI: 10.1016/j.saa.2014.11.106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 11/22/2014] [Accepted: 11/25/2014] [Indexed: 06/04/2023]
Abstract
We synthesized novel boron chelate complexes by the reaction of pyrazoline derivatives and boron trifluoride diethyl etherate followed by a new rearrangement. The structures of the compounds were characterized by IR, NMR and HRMS, especially, a typical compound 3c was confirmed by X-ray single crystal analysis. We proposed a mechanism of the rearrangement. Moreover, the absorption and fluorescence spectroscopy of these compounds were measured.
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Affiliation(s)
- Rui-Zhe Zhang
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China
| | - Xiao Feng
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China
| | - Ying Liu
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China
| | - Sheng-Qing Wang
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China
| | - Jin-Ting Liu
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China.
| | - Bao-Xiang Zhao
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China.
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18
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Wu Y, Li Z, Liu Q, Wang X, Yan H, Gong S, Liu Z, He W. High solid-state luminescence in propeller-shaped AIE-active pyridine–ketoiminate–boron complexes. Org Biomol Chem 2015; 13:5775-82. [DOI: 10.1039/c5ob00607d] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two pyridine-ketoiminate-based organoboron complexes were demonstrated to possess aggregation-induced emission, large Stokes shift and high quantum yield in the solid-state, which were rationalized through X-ray crystal analysis and electronic structure calculations.
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Affiliation(s)
- Yanping Wu
- Institute of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- People's Republic of China
| | - Zhenyu Li
- Institute of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- People's Republic of China
| | - Qingsong Liu
- Institute of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- People's Republic of China
| | - Xiaoqing Wang
- Institute of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- People's Republic of China
| | - Hui Yan
- School of Pharmacy
- Liaocheng University
- Liaocheng
- People's Republic of China
| | - Shuwen Gong
- Institute of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- People's Republic of China
| | - Zhipeng Liu
- Institute of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- People's Republic of China
| | - Weijiang He
- State Key Laboratory of Coordination Chemistry
- Coordination Chemistry Institute
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
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19
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Yu C, Hao E, Li T, Wang J, Sheng W, Wei Y, Mu X, Jiao L. Dipyrrolylquinoxaline difluoroborates with intense red solid-state fluorescence. Dalton Trans 2015; 44:13897-905. [DOI: 10.1039/c5dt02012c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dipyrrolylquinoxalines and their BF2 complexes were synthesized and characterized by their X-ray structural analysis, optical and electrochemical properties. These dyes exhibit strong broad absorption in the visible region and intensely tunable solid-state fluorescence.
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Affiliation(s)
- Changjiang Yu
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu
- China
| | - Erhong Hao
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu
- China
| | - Tingting Li
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu
- China
| | - Jun Wang
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu
- China
| | - Wanle Sheng
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu
- China
| | - Yun Wei
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu
- China
| | - Xiaolong Mu
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu
- China
| | - Lijuan Jiao
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu
- China
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20
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Glotzbach C, Gödeke N, Fröhlich R, Daniliuc CG, Saito S, Yamaguchi S, Würthwein EU. Fluorescent benzene-centered mono-, bis- and tris-triazapentadiene–boron complexes. Dalton Trans 2015; 44:9659-71. [DOI: 10.1039/c5dt00908a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Benniston AC, Sirbu D, Turta C, Probert MR, Clegg W. Synthesis, Molecular Structure and Properties of a Ferrocene‐Based Difluoropyrrolo‐Oxaborole Derivative. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402752] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Andrew C. Benniston
- Molecular Photonics Laboratory, School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK, http://www.ncl.ac.uk/mpl/
| | - Dumitru Sirbu
- Institute of Chemistry, Academy of Sciences of Moldova, Chisinau, Republic of Moldova
| | - Constantin Turta
- Institute of Chemistry, Academy of Sciences of Moldova, Chisinau, Republic of Moldova
| | - Michael R. Probert
- Crystallography Laboratory, School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - William Clegg
- Crystallography Laboratory, School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
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22
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Kubota Y, Sakuma Y, Funabiki K, Matsui M. Solvatochromic Fluorescence Properties of Pyrazine–Boron Complex Bearing a β-Iminoenolate Ligand. J Phys Chem A 2014; 118:8717-29. [DOI: 10.1021/jp506680g] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Yasuhiro Kubota
- Department of Chemistry and
Biomolecular Science, Faculty of Engineering, Gifu University, 1-1
Yanagido, Gifu 501-1193, Japan
| | - Yusuke Sakuma
- Department of Chemistry and
Biomolecular Science, Faculty of Engineering, Gifu University, 1-1
Yanagido, Gifu 501-1193, Japan
| | - Kazumasa Funabiki
- Department of Chemistry and
Biomolecular Science, Faculty of Engineering, Gifu University, 1-1
Yanagido, Gifu 501-1193, Japan
| | - Masaki Matsui
- Department of Chemistry and
Biomolecular Science, Faculty of Engineering, Gifu University, 1-1
Yanagido, Gifu 501-1193, Japan
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23
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Samonina-Kosicka J, DeRosa CA, Morris WA, Fan Z, Fraser CL. Dual-Emissive Difluoroboron Naphthyl-Phenyl β-Diketonate Polylactide Materials: Effects of Heavy Atom Placement and Polymer Molecular Weight. Macromolecules 2014; 47:3736-3746. [PMID: 24954954 PMCID: PMC4059218 DOI: 10.1021/ma5006606] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 05/07/2014] [Indexed: 01/31/2023]
Abstract
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Luminescent materials are important
for imaging and sensing. Aromatic
difluoroboron β-diketonate complexes (BF2bdks) are
classic fluorescent molecules that have been explored as photochemical
reagents, two-photon dyes, and oxygen sensors. A series of BF2bdks with naphthyl and phenyl groups was synthesized, and
photophysical properties were investigated in both methylene chloride
and poly(lactic acid) (PLA). Polymer molecular weight and dye attachment
site along with bromide heavy atom placement were varied to tune optical
properties of dye–PLA materials. Systems without heavy atoms
have long phosphorescence lifetimes, which is useful for lifetime-based
oxygen sensing. Bromine substitution on the naphthyl ring resulted
in intense, clearly distinguishable fluorescence and phosphorescence
peaks important for ratiometric oxygen sensing and imaging.
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Affiliation(s)
- Jelena Samonina-Kosicka
- Department of Chemistry, University of Virginia , McCormick Road, Charlottesville, Virginia 22904, United States
| | - Christopher A DeRosa
- Department of Chemistry, University of Virginia , McCormick Road, Charlottesville, Virginia 22904, United States
| | - William A Morris
- Department of Chemistry, University of Virginia , McCormick Road, Charlottesville, Virginia 22904, United States
| | - Ziyi Fan
- Department of Chemistry, University of Virginia , McCormick Road, Charlottesville, Virginia 22904, United States
| | - Cassandra L Fraser
- Department of Chemistry, University of Virginia , McCormick Road, Charlottesville, Virginia 22904, United States
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24
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Yu C, Jiao L, Zhang P, Feng Z, Cheng C, Wei Y, Mu X, Hao E. Highly fluorescent BF2 complexes of hydrazine-Schiff base linked bispyrrole. Org Lett 2014; 16:3048-51. [PMID: 24850322 DOI: 10.1021/ol501162f] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A series of BF2 complexes of hydrazine-Schiff base linked bispyrrole have been prepared from a simple two-step reaction from commercially available substances and are highly fluorescent in solution, film, and solid states with larger Stokes shift and excellent photostabilities comparable or even super to those of their BODIPY analogues. These resultant fluorescent dyes are highly susceptible to the postfunctionalization, as demonstrated in this work via the Knoevenagel condensation to introducing functionalities or tether groups to the chromophore.
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Affiliation(s)
- Changjiang Yu
- Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, School of Chemistry and Materials Science, Anhui Normal University , Wuhu, Anhui 241000, China
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25
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Chibani S, Charaf-Eddin A, Mennucci B, Le Guennic B, Jacquemin D. Optical Signatures of OBO Fluorophores: A Theoretical Analysis. J Chem Theory Comput 2014; 10:805-15. [DOI: 10.1021/ct4009848] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Siwar Chibani
- Laboratoire
CEISAM, UMR CNRS 6230, Université de Nantes, 2 Rue de la
Houssinière, BP 92208, 44322 Nantes Cedex 3, France
| | - Azzam Charaf-Eddin
- Laboratoire
CEISAM, UMR CNRS 6230, Université de Nantes, 2 Rue de la
Houssinière, BP 92208, 44322 Nantes Cedex 3, France
| | - Benedetta Mennucci
- Department
of Chemistry, University of Pisa, Via Risorgimento 35, 56126 Pisa, Italy
| | - Boris Le Guennic
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, 263 Av. du General Leclerc, 35042 Rennes Cedex, France
| | - Denis Jacquemin
- Laboratoire
CEISAM, UMR CNRS 6230, Université de Nantes, 2 Rue de la
Houssinière, BP 92208, 44322 Nantes Cedex 3, France
- Institut Universitaire de France, 103 bd Saint-Michel, F-75005 Paris Cedex 05, France
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26
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Gao N, Cheng C, Yu C, Hao E, Wang S, Wang J, Wei Y, Mu X, Jiao L. Facile synthesis of highly fluorescent BF2 complexes bearing isoindolin-1-one ligand. Dalton Trans 2014; 43:7121-7. [DOI: 10.1039/c4dt00138a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new class of isoindolin-1-one based BF2 complexes containing pyridine or benzothiazole groups has been prepared from a “one-pot” reaction.
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Affiliation(s)
- Naixun Gao
- Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu, China 241000
| | - Chi Cheng
- Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu, China 241000
| | - Changjiang Yu
- Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu, China 241000
| | - Erhong Hao
- Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu, China 241000
| | - Shengyuan Wang
- Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu, China 241000
| | - Jun Wang
- Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu, China 241000
| | - Yun Wei
- Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu, China 241000
| | - Xiaolong Mu
- Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu, China 241000
| | - Lijuan Jiao
- Laboratory of Functional Molecular Solids
- Ministry of Education; Anhui Laboratory of Molecule-Based Materials; School of Chemistry and Materials Science
- Anhui Normal University
- Wuhu, China 241000
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27
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Neue B, Wakamiya A, Fröhlich R, Wibbeling B, Yamaguchi S, Würthwein EU. Modification and Unexpected Reactivity of 2-Borylbenzaldimines: Acylated and Silylated Derivatives as Well as Dimeric Compounds. J Org Chem 2013; 78:11747-55. [DOI: 10.1021/jo401748d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Benedikt Neue
- Organisch-Chemisches
Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Atsushi Wakamiya
- Institute for Chemical Research, Kyoto University Uji,
Gokasho, Kyoto 611-0011, Japan
| | - Roland Fröhlich
- Organisch-Chemisches
Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Birgit Wibbeling
- Organisch-Chemisches
Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Shigehiro Yamaguchi
- Department of Chemistry, Graduate
School of
Science, Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
| | - Ernst-Ulrich Würthwein
- Organisch-Chemisches
Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
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28
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Zhao D, Li G, Wu D, Qin X, Neuhaus P, Cheng Y, Yang S, Lu Z, Pu X, Long C, You J. Regiospecific N-Heteroarylation of Amidines for Full-Color-Tunable Boron Difluoride Dyes with Mechanochromic Luminescence. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304824] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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29
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Zhao D, Li G, Wu D, Qin X, Neuhaus P, Cheng Y, Yang S, Lu Z, Pu X, Long C, You J. Regiospecific N-Heteroarylation of Amidines for Full-Color-Tunable Boron Difluoride Dyes with Mechanochromic Luminescence. Angew Chem Int Ed Engl 2013; 52:13676-80. [DOI: 10.1002/anie.201304824] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 07/28/2013] [Indexed: 01/28/2023]
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30
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Kiprof P, Carlson JC, Anderson DR, Nemykin VN. Systematic color tuning of a family of luminescent azole-based organoboron compounds suitable for OLED applications. Dalton Trans 2013; 42:15120-32. [DOI: 10.1039/c3dt51853a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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