51
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Turkoglu G, Cinar ME, Ozturk T. Synthesis and Photophysical and Anion-Sensing Properties of Triarylborane-Substituted Cross-Conjugated and Conjugated Thienothiophenes. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700679] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Gulsen Turkoglu
- Department of Chemistry; Istanbul Technical University; Maslak 34469 Istanbul Turkey
| | - M. Emin Cinar
- Department of Chemistry; Istanbul Technical University; Maslak 34469 Istanbul Turkey
- Department Chemie-Biologie; Universität Siegen; OC1 57068 Siegen Germany
| | - Turan Ozturk
- Department of Chemistry; Istanbul Technical University; Maslak 34469 Istanbul Turkey
- Chemistry Group Laboratories; TUBITAK-UME; P. O. Box 54, Gebze 41471 Kocaeli Turkey
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52
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Hecht R, Kade J, Schmidt D, Nowak-Król A. n-Channel Organic Semiconductors Derived from Air-Stable Four-Coordinate Boron Complexes of Substituted Thienylthiazoles. Chemistry 2017; 23:11620-11628. [DOI: 10.1002/chem.201701922] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Indexed: 02/04/2023]
Affiliation(s)
- Reinhard Hecht
- Center for Nanosystems Chemistry (CNC) and Bavarian Polymer Institute (BPI); Universität Würzburg; Theodor-Boveri-Weg 97074 Würzburg Germany
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Juliane Kade
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - David Schmidt
- Center for Nanosystems Chemistry (CNC) and Bavarian Polymer Institute (BPI); Universität Würzburg; Theodor-Boveri-Weg 97074 Würzburg Germany
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Agnieszka Nowak-Król
- Center for Nanosystems Chemistry (CNC) and Bavarian Polymer Institute (BPI); Universität Würzburg; Theodor-Boveri-Weg 97074 Würzburg Germany
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
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53
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Zhang Q, Tian X, Zhou H, Wu J, Tian Y. Lighting the Way to See Inside Two-Photon Absorption Materials: Structure-Property Relationship and Biological Imaging. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E223. [PMID: 28772584 PMCID: PMC5503390 DOI: 10.3390/ma10030223] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 02/16/2017] [Indexed: 12/11/2022]
Abstract
The application of two-photon absorption (2PA) materials is a classical research field and has recently attracted increasing interest. It has generated a demand for new dyes with high 2PA cross-sections. In this short review, we briefly cover the structure-2PA property relationships of organic fluorophores, organic-inorganic nanohybrids and metal complexes explored by our group. (1) The two-photon absorption cross-section (δ) of organic fluorophores increases with the extent of charge transfer, which is important to optimize the core, donor-acceptor pair, and conjugation-bridge to obtain a large δ value. Among the various cores, triphenylamine appears to be an efficient core. Lengthening of the conjugation with styryl groups in the D-π-D quadrupoles and D-π-A dipoles increased δ over a long wavelength range than when vinylene groups were used. Large values of δ were observed for extended conjugation length and moderate donor-acceptors in the near-IR wavelengths. The δ value of the three-arm octupole is larger than that of the individual arm, if the core has electron accepting groups that allow significant electronic coupling between the arms; (2) Optical functional organic/inorganic hybrid materials usually show high thermal stability and excellent optical activity; therefore the design of functional organic molecules to build functional organic-inorganic hybrids and optimize the 2PA properties are significant. Advances have been made in the design of organic-inorganic nanohybrid materials of different sizes and shapes for 2PA property, which provide useful examples to illustrate the new features of the 2PA response in comparison to the more thoroughly investigated donor-acceptor based organic compounds and inorganic components; (3) Metal complexes are of particular interest for the design of new materials with large 2PA ability. They offer a wide range of metals with different ligands, which can give rise to tunable electronic and 2PA properties. The metal ions, including transition metals and lanthanides, can serve as an important part of the structure to control the intramolecular charge-transfer process that drives the 2PA process. As templates, transition metal ions can assemble simple to more sophisticated ligands in a variety of multipolar arrangements resulting in interesting and tailorable electronic and optical properties, depending on the nature of the metal center and the energetics of the metal-ligand interactions, such as intraligand charge-transfer (ILCT) and metal-ligand charge-transfer (MLCT) processes. Lanthanide complexes are attractive for a number of reasons: (i) their visible emissions are quite long-lived; (ii) their absorption and emission can be tuned with the aid of appropriate photoactive ligands; (iii) the accessible energy-transfer path between the photo-active ligands and the lanthanide ion can facilitate efficient lanthanide-based 2PA properties. Thus, the above materials with excellent 2PA properties should be applied in two-photon applications, especially two-photon fluorescence microscopy (TPFM) and related emission-based applications. Furthermore, the progress of research into the use of those new 2PA materials with moderate 2PA cross section in the near-infrared region, good Materials 2017, 10, 223 2 of 37 biocompatibility, and enhanced two-photon excited fluorescence for two-photon bio-imaging is summarized. In addition, several possible future directions in this field are also discussed (146 references).
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Affiliation(s)
- Qiong Zhang
- Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Department of Chemistry, Anhui University, Hefei 230039, China.
| | - Xiaohe Tian
- School of Life Science, Anhui University, Hefei 230039, China.
| | - Hongping Zhou
- Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Department of Chemistry, Anhui University, Hefei 230039, China.
| | - Jieying Wu
- Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Department of Chemistry, Anhui University, Hefei 230039, China.
| | - Yupeng Tian
- Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Department of Chemistry, Anhui University, Hefei 230039, China.
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54
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Affiliation(s)
- Sheng-Yong Li
- School of Chemistry and Chemical Engineering,
Key Laboratory of Special Functional Aggregated Materials, Ministry
of Education, Shandong University, Jinan 250100, People’s Republic of China
| | - Zuo-Bang Sun
- School of Chemistry and Chemical Engineering,
Key Laboratory of Special Functional Aggregated Materials, Ministry
of Education, Shandong University, Jinan 250100, People’s Republic of China
| | - Cui-Hua Zhao
- School of Chemistry and Chemical Engineering,
Key Laboratory of Special Functional Aggregated Materials, Ministry
of Education, Shandong University, Jinan 250100, People’s Republic of China
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55
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Ji L, Griesbeck S, Marder TB. Recent developments in and perspectives on three-coordinate boron materials: a bright future. Chem Sci 2017; 8:846-863. [PMID: 28572897 PMCID: PMC5452272 DOI: 10.1039/c6sc04245g] [Citation(s) in RCA: 437] [Impact Index Per Article: 62.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 11/08/2016] [Indexed: 12/12/2022] Open
Abstract
The empty p z -orbital of a three-coordinate organoboron compound leads to its electron-deficient properties, which make it an excellent π-acceptor in conjugated organic chromophores. The empty p-orbital in such Lewis acids can be attacked by nucleophiles, so bulky groups are often employed to provide air-stable materials. However, many of these can still bind fluoride and cyanide anions leading to applications as anion-selective sensors. One electron reduction generates radical anions. The π-acceptor strength can be easily tuned by varying the organic substituents. Many of these compounds show strong two-photon absorption (TPA) and two-photon excited fluorescence (TPEF) behaviour, which can be applied for e.g. biological imaging. Furthermore, these chromophores can be used as emitters and electron transporters in OLEDs, and examples have recently been found to exhibit efficient thermally activated delayed fluorescence (TADF). The three-coordinate organoboron unit can also be incorporated into polycyclic aromatic hydrocarbons. Such boron-doped compounds exhibit very interesting properties, distinct from their all-carbon analogues. Significant developments have been made in all of these areas in recent years and new applications are rapidly emerging for this class of boron compounds.
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Affiliation(s)
- Lei Ji
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Stefanie Griesbeck
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Todd B Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
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56
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Zhang Q, Guan R, Tian X, Luo L, Zhou H, Li S, Wu J, Tian Y. Small water-soluble pyrimidine hexafluorophosphate derivatives with high two-photon absorption activities in the near-IR region and their biological applications. RSC Adv 2017. [DOI: 10.1039/c7ra00380c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Two imidazole–pyrimidine hexafluorophosphate derivatives (6P and 10P) are synthesized. The 2PA cross-section values (σ) were obtained by Z-scan and two-photon excited fluorescence methods. 6P and 10P can be used to quantify and image organelles in living cells and tissues.
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Affiliation(s)
- Qiong Zhang
- Department of Chemistry
- Key Laboratory Inorganic Material Chemistry of Anhui Province
- Anhui University
- Hefei 230039
- PR China
| | - Rongting Guan
- Department of Chemistry
- Key Laboratory Inorganic Material Chemistry of Anhui Province
- Anhui University
- Hefei 230039
- PR China
| | - Xiaohe Tian
- School of Life Science
- Anhui University
- Hefei
- P. R. China
| | - Lei Luo
- College of Pharmaceutical Science
- Southwest University
- China
| | - Hongping Zhou
- Department of Chemistry
- Key Laboratory Inorganic Material Chemistry of Anhui Province
- Anhui University
- Hefei 230039
- PR China
| | - Shengli Li
- Department of Chemistry
- Key Laboratory Inorganic Material Chemistry of Anhui Province
- Anhui University
- Hefei 230039
- PR China
| | - Jieying Wu
- Department of Chemistry
- Key Laboratory Inorganic Material Chemistry of Anhui Province
- Anhui University
- Hefei 230039
- PR China
| | - Yupeng Tian
- Department of Chemistry
- Key Laboratory Inorganic Material Chemistry of Anhui Province
- Anhui University
- Hefei 230039
- PR China
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57
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Asami SS, Okamoto M, Suzuki K, Yamashita M. A Boryl-Substituted Diphosphene: Synthesis, Structure, and Reaction with n-Butyllithium To Form a Stabilized Adduct by pπ-pπ Interaction. Angew Chem Int Ed Engl 2016; 55:12827-31. [PMID: 27629120 DOI: 10.1002/anie.201607995] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Indexed: 11/12/2022]
Abstract
A boryl-substituted diphosphene was synthesized through the nucleophilic borylation of PCl3 with a borylzinc reagent, followed by a reduction with Mg. A combined analysis of the resulting diboryldiphosphene by single-crystal X-ray diffraction, DFT calculations, and UV/Vis spectroscopy revealed a σ-electron-donating effect for the boryl substituent that was slightly weaker than that of the 2,4,6-tri-tert-butylphenyl (Mes*) ligand. The reaction of this diboryldiphosphene with (n) BuLi afforded a boryl-substituted phosphinophosphide that was, in comparison with the thermally unstable Mes*-substituted diaryldiphosphene, stabilized by a π-electron-accepting effect of the boryl substituent.
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Affiliation(s)
- Shun-Suke Asami
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Masafumi Okamoto
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Katsunori Suzuki
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Makoto Yamashita
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan.
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58
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Carrillo JA, Turner ML, Ingleson MJ. A General Protocol for the Polycondensation of Thienyl N-Methyliminodiacetic Acid Boronate Esters To Form High Molecular Weight Copolymers. J Am Chem Soc 2016; 138:13361-13368. [PMID: 27636745 PMCID: PMC5152940 DOI: 10.1021/jacs.6b07666] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
![]()
Thienyl di-N-methyliminodiacetic acid (MIDA) boronate
esters are readily synthesized by electrophilic C–H borylation
producing bench stable crystalline solids in good yield and excellent
purity. Optimal conditions for the slow release of the boronic acid
using KOH as the base in biphasic THF/water mixtures enables the thienyl
MIDA boronate esters to be extremely effective homo-bifunctionalized
(AA-type) monomers in Suzuki–Miyaura copolymerizations with
dibromo-heteroarenes (BB-type monomers). A single polymerization protocol
is applicable for the formation of five alternating thienyl copolymers
that are (or are close analogues of) state of the art materials used
in organic electronics. The five polymers were produced in excellent
yields and with high molecular weights comparable to those produced
using Stille copolymerization protocols. Therefore, thienyl di-MIDA
boronate esters represent bench stable and low toxicity alternatives
to highly toxic di-trimethylstannyl AA-type monomers that are currently
ubiquitous in the synthesis of these important alternating copolymers.
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Affiliation(s)
| | - Michael L Turner
- School of Chemistry, University of Manchester , Manchester M13 9PL, U.K
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59
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Kumar GR, Sarkar SK, Thilagar P. Aggregation-Induced Emission and Sensing Characteristics of Triarylborane-Oligothiophene-Dicyanovinyl Triads. Chemistry 2016; 22:17215-17225. [DOI: 10.1002/chem.201603349] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Indexed: 02/05/2023]
Affiliation(s)
- George Rajendra Kumar
- Inorganic and Physical Chemistry Department (IPC); Indian Institute of Science (IISc); Bangalore 560012 India
| | - Samir Kumar Sarkar
- Inorganic and Physical Chemistry Department (IPC); Indian Institute of Science (IISc); Bangalore 560012 India
| | - Pakkirisamy Thilagar
- Inorganic and Physical Chemistry Department (IPC); Indian Institute of Science (IISc); Bangalore 560012 India
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60
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Asami SS, Okamoto M, Suzuki K, Yamashita M. A Boryl-Substituted Diphosphene: Synthesis, Structure, and Reaction withn-Butyllithium To Form a Stabilized Adduct by pπ-pπ Interaction. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607995] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shun-suke Asami
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Masafumi Okamoto
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Katsunori Suzuki
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Makoto Yamashita
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
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61
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Griesbeck S, Zhang Z, Gutmann M, Lühmann T, Edkins RM, Clermont G, Lazar AN, Haehnel M, Edkins K, Eichhorn A, Blanchard-Desce M, Meinel L, Marder TB. Water-Soluble Triarylborane Chromophores for One- and Two-Photon Excited Fluorescence Imaging of Mitochondria in Cells. Chemistry 2016; 22:14701-6. [DOI: 10.1002/chem.201602639] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Indexed: 12/21/2022]
Affiliation(s)
- Stefanie Griesbeck
- Institut für Anorganische Chemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Zuolun Zhang
- Institut für Anorganische Chemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
- State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 P.R. China
| | - Marcus Gutmann
- Institut für Pharmazie und Lebensmittelchemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Tessa Lühmann
- Institut für Pharmazie und Lebensmittelchemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Robert M. Edkins
- Institut für Anorganische Chemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
- Chemistry Research Laboratory; University of Oxford; 12 Mansfield Road Oxford OX1 3TA UK
| | - Guillaume Clermont
- Institut des Sciences Moléculaires; Univ. Bordeaux, ISM (CNRS UMR5255), Bâtiment A12, 351 cours de la libération; 33405 TALENCE cedex France
| | - Adina N. Lazar
- Institut des Sciences Moléculaires; Univ. Bordeaux, ISM (CNRS UMR5255), Bâtiment A12, 351 cours de la libération; 33405 TALENCE cedex France
| | - Martin Haehnel
- Institut für Anorganische Chemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Katharina Edkins
- Institut für Anorganische Chemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
- School of Medicine, Pharmacy and Health; Durham University, University Boulevard; Stockton-on-Tees TS17 6BH UK
| | - Antonius Eichhorn
- Institut für Anorganische Chemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Mireille Blanchard-Desce
- Institut des Sciences Moléculaires; Univ. Bordeaux, ISM (CNRS UMR5255), Bâtiment A12, 351 cours de la libération; 33405 TALENCE cedex France
| | - Lorenz Meinel
- Institut für Pharmazie und Lebensmittelchemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Todd B. Marder
- Institut für Anorganische Chemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
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62
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Yuan K, Wang X, Mellerup SK, Wyman I, Schatte G, Ding Z, Wang S. Triarylborane-Supported Polyferrocenyl Systems: Impact of the Linking Unit on Electronic and Electrochemical Properties. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00574] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kang Yuan
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Xiang Wang
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Soren K. Mellerup
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Ian Wyman
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Gabriele Schatte
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Suning Wang
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
- Beijing Key Laboratory of Photoelectronic/Electrophotonic
Conversion Materials, School of Chemistry, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
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63
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Cox PA, Leach AG, Campbell AD, Lloyd-Jones GC. Protodeboronation of Heteroaromatic, Vinyl, and Cyclopropyl Boronic Acids: pH–Rate Profiles, Autocatalysis, and Disproportionation. J Am Chem Soc 2016; 138:9145-57. [DOI: 10.1021/jacs.6b03283] [Citation(s) in RCA: 218] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Paul A. Cox
- School
of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster
Road, Edinburgh EH9 3FJ, United Kingdom
| | - Andrew G. Leach
- School
of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, United Kingdom
| | - Andrew D. Campbell
- Pharmaceutical
Technology and Development, AstraZeneca, Silk Road Business Park, Macclesfield SK10 2NA, United Kingdom
| | - Guy C. Lloyd-Jones
- School
of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster
Road, Edinburgh EH9 3FJ, United Kingdom
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64
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Kojima C, Lee KH, Lin Z, Yamashita M. Direct and Base-Catalyzed Diboration of Alkynes Using the Unsymmetrical Diborane(4), pinB-BMes2. J Am Chem Soc 2016; 138:6662-9. [PMID: 27139814 DOI: 10.1021/jacs.6b03686] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In the absence of transition metal catalysts, the unsymmetrical diborane(4), pinB-BMes2, reacted with alkynes to afford diborylalkenes. The isomer ratio of the products could be controlled via temperature, solvent, and additive(s). A reaction mechanism was proposed on the basis of two isolated intermediates, and this reaction could furthermore be applied to synthesize a luminescent molecule.
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Affiliation(s)
- Chiemi Kojima
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University , 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Ka-Ho Lee
- Department of Chemistry, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong
| | - Makoto Yamashita
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University , 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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65
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Lanoë PH, Mettra B, Liao YY, Calin N, D'Aléo A, Namikawa T, Kamada K, Fages F, Monnereau C, Andraud C. Theoretical and Experimental Study on Boron β-Diketonate Complexes with Intense Two-Photon-Induced Fluorescence in Solution and in the Solid State. Chemphyschem 2016; 17:2128-36. [DOI: 10.1002/cphc.201600178] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Indexed: 02/06/2023]
Affiliation(s)
- Pierre-Henri Lanoë
- Laboratoire de Chimie UMR CNRS 5182; Ecole Normale Supérieure de Lyon/Université de Lyon, 46; Allée d'Italie, 69007 Lyon France
| | - Bastien Mettra
- Laboratoire de Chimie UMR CNRS 5182; Ecole Normale Supérieure de Lyon/Université de Lyon, 46; Allée d'Italie, 69007 Lyon France
| | - Yuan Yuan Liao
- Laboratoire de Chimie UMR CNRS 5182; Ecole Normale Supérieure de Lyon/Université de Lyon, 46; Allée d'Italie, 69007 Lyon France
| | - Nathalie Calin
- Laboratoire de Chimie UMR CNRS 5182; Ecole Normale Supérieure de Lyon/Université de Lyon, 46; Allée d'Italie, 69007 Lyon France
| | - Anthony D'Aléo
- CINAM UMR CNRS 7325; Université Aix-Marseille; Campus de Luminy, Case 913, 13288 Marseille France
| | - Tomotaka Namikawa
- IFMRI; National Institute of Advanced Industrial Science and Technology (AIST), Ikeda; Osaka 563-8577 Japan
| | - Kenji Kamada
- IFMRI; National Institute of Advanced Industrial Science and Technology (AIST), Ikeda; Osaka 563-8577 Japan
| | - Fréderic Fages
- CINAM UMR CNRS 7325; Université Aix-Marseille; Campus de Luminy, Case 913, 13288 Marseille France
| | - Cyrille Monnereau
- Laboratoire de Chimie UMR CNRS 5182; Ecole Normale Supérieure de Lyon/Université de Lyon, 46; Allée d'Italie, 69007 Lyon France
| | - Chantal Andraud
- Laboratoire de Chimie UMR CNRS 5182; Ecole Normale Supérieure de Lyon/Université de Lyon, 46; Allée d'Italie, 69007 Lyon France
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66
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Lin YF, Shen CT, Hsiao YT, Liu YH, Peng SM, Chiu CW. Mechanistic Studies on the Rearrangement of a Boron Cation: From a nido-Carborane to a Planar Boracycle. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00077] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ya-Fan Lin
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, Taiwan, 10617
| | - Chao-Tang Shen
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, Taiwan, 10617
| | - Yu-Ting Hsiao
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, Taiwan, 10617
| | - Yi-Hung Liu
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, Taiwan, 10617
| | - Shie-Ming Peng
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, Taiwan, 10617
| | - Ching-Wen Chiu
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, Taiwan, 10617
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67
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Chen B, Feng G, He B, Goh C, Xu S, Ramos-Ortiz G, Aparicio-Ixta L, Zhou J, Ng L, Zhao Z, Liu B, Tang BZ. Silole-Based Red Fluorescent Organic Dots for Bright Two-Photon Fluorescence In vitro Cell and In vivo Blood Vessel Imaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:782-92. [PMID: 26701147 DOI: 10.1002/smll.201502822] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Indexed: 05/24/2023]
Abstract
Robust luminescent dyes with efficient two-photon fluorescence are highly desirable for biological imaging applications, but those suitable for organic dots fabrication are still rare because of aggregation-caused quenching. In this work, a red fluorescent silole, 2,5-bis[5-(dimesitylboranyl)thiophen-2-yl]-1-methyl-1,3,4-triphenylsilole ((MesB)2 DTTPS), is synthesized and characterized. (MesB)2 DTTPS exhibits enhanced fluorescence efficiency in nanoaggregates, indicative of aggregation-enhanced emission (AEE). The organic dots fabricated by encapsulating (MesB)2 DTTPS within lipid-PEG show red fluorescence peaking at 598 nm and a high fluorescence quantum yield of 32%. Upon excitation at 820 nm, the dots show a large two-photon absorption cross section of 3.43 × 10(5) GM, which yields a two-photon action cross section of 1.09 × 10(5) GM. These (MesB)2 DTTPS dots show good biocompatibility and are successfully applied to one-photon and two-photon fluorescence imaging of MCF-7 cells and two-photon in vivo visualization of the blood vascular of mouse muscle in a high-contrast and noninvasive manner. Moreover, the 3D blood vasculature located at the mouse ear skin with a depth of over 100 μm can also be visualized clearly, providing the spatiotemporal information about the whole blood vascular network.
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Affiliation(s)
- Bin Chen
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 310036, China
| | - Guangxue Feng
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585
| | - Bairong He
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Chiching Goh
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), Biopolis, Singapore, 138648
| | - Shidang Xu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585
| | | | | | - Jian Zhou
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 310036, China
| | - Laiguan Ng
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), Biopolis, Singapore, 138648
| | - Zujin Zhao
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 310036, China
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585
| | - Ben Zhong Tang
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
- Department of Chemistry, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
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68
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Yuan K, Suzuki N, Mellerup SK, Wang X, Yamaguchi S, Wang S. Pyridyl Directed Catalyst-Free trans-Hydroboration of Internal Alkynes. Org Lett 2016; 18:720-3. [PMID: 26828116 DOI: 10.1021/acs.orglett.5b03698] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the first examples of straightforward trans-hydroboration of internal alkynes at room temperature with 9-BBN, producing five-membered BN-heterocycles. Contrary to conventional cis-hydroboration, we demonstrate that the introduction of a pyridyl group switches the stereoselectivity of the reaction. A hydride migration mechanism has been proposed and supported by DFT calculations for the trans-hydroboration. This new hydroboration approach allows facile construction of new blue fluorescent BN-heterocyclic compounds.
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Affiliation(s)
- Kang Yuan
- Department of Chemistry, Queen's University , Kingston, Ontario K7L 3N6, Canada
| | - Naoya Suzuki
- Department of Chemistry, Graduate School of Science, Nagoya University , Furo, Chikusa, Nagoya 464-8602, Japan
| | - Soren K Mellerup
- Department of Chemistry, Queen's University , Kingston, Ontario K7L 3N6, Canada
| | - Xiang Wang
- Department of Chemistry, Queen's University , Kingston, Ontario K7L 3N6, Canada
| | - Shigehiro Yamaguchi
- Department of Chemistry, Graduate School of Science, Nagoya University , Furo, Chikusa, Nagoya 464-8602, Japan
| | - Suning Wang
- Department of Chemistry, Queen's University , Kingston, Ontario K7L 3N6, Canada.,Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry, Beijing Institute of Technology , Beijing 100081, P. R. China
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69
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Yin X, Guo F, Lalancette RA, Jäkle F. Luminescent Main-Chain Organoborane Polymers: Highly Robust, Electron-Deficient Poly(oligothiophene borane)s via Stille Coupling Polymerization. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b02446] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Xiaodong Yin
- Department of Chemistry, Rutgers University Newark, 73
Warren Street, Newark, New
Jersey 07102, United States
| | - Fang Guo
- Department of Chemistry, Rutgers University Newark, 73
Warren Street, Newark, New
Jersey 07102, United States
| | - Roger A. Lalancette
- Department of Chemistry, Rutgers University Newark, 73
Warren Street, Newark, New
Jersey 07102, United States
| | - Frieder Jäkle
- Department of Chemistry, Rutgers University Newark, 73
Warren Street, Newark, New
Jersey 07102, United States
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70
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Ren Y, Jäkle F. Merging thiophene with boron: new building blocks for conjugated materials. Dalton Trans 2016; 45:13996-4007. [DOI: 10.1039/c6dt02756c] [Citation(s) in RCA: 174] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recent advances on the use of thienylborane chemistry for the development of new functional materials are highlighted.
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Affiliation(s)
- Yi Ren
- Department of Chemistry
- Rutgers University–Newark
- Newark
- USA
| | - Frieder Jäkle
- Department of Chemistry
- Rutgers University–Newark
- Newark
- USA
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71
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Mikayelyan E, Vladimirov I, Wesner D, Grodd L, Rodygin AI, Schönherr H, Ponomarenko SA, Pietsch U, Ivanov DA, Grigorian S. Impact of substrate temperature on the structure and electrical performance of vacuum-deposited α,α′-DH5T oligothiophene thin films. RSC Adv 2016. [DOI: 10.1039/c6ra24609e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Remarkable structural changes are reported for α,α′-DH5T oligomer thin films evaporated at different substrate temperatures and directly correlated with the electrical performance where the order of π–π stacking plays a crucial role.
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Affiliation(s)
| | - Ilja Vladimirov
- Department of Materials and Interfaces
- Weizmann Institute of Science
- Rehovot 76100
- Israel
| | - Daniel Wesner
- Physical Chemistry I
- Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ)
- University of Siegen
- 57076 Siegen
- Germany
| | - Linda Grodd
- Department of Physics
- University of Siegen
- 57072 Siegen
- Germany
| | - Alexander I. Rodygin
- Faculty of Fundamental Physical and Chemical Engineering
- Lomonosov Moscow State University
- Moscow 119991
- Russian Federation
| | - Holger Schönherr
- Physical Chemistry I
- Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering (Cμ)
- University of Siegen
- 57076 Siegen
- Germany
| | - Sergei A. Ponomarenko
- Chemistry Department
- Lomonosov Moscow State University
- Moscow 119991
- Russian Federation
- Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences
| | - Ullrich Pietsch
- Department of Physics
- University of Siegen
- 57072 Siegen
- Germany
| | - Dimitri A. Ivanov
- Faculty of Fundamental Physical and Chemical Engineering
- Lomonosov Moscow State University
- Moscow 119991
- Russian Federation
- Moscow Institute of Physics and Technology (State University)
| | - Souren Grigorian
- Department of Physics
- University of Siegen
- 57072 Siegen
- Germany
- Aix-Marseille Université
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72
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Légaré MA, Courtemanche MA, Rochette É, Fontaine FG. BORON CATALYSIS. Metal-free catalytic C-H bond activation and borylation of heteroarenes. Science 2015; 349:513-6. [PMID: 26228143 DOI: 10.1126/science.aab3591] [Citation(s) in RCA: 331] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Transition metal complexes are efficient catalysts for the C-H bond functionalization of heteroarenes to generate useful products for the pharmaceutical and agricultural industries. However, the costly need to remove potentially toxic trace metals from the end products has prompted great interest in developing metal-free catalysts that can mimic metallic systems. We demonstrated that the borane (1-TMP-2-BH2-C6H4)2 (TMP, 2,2,6,6-tetramethylpiperidine) can activate the C-H bonds of heteroarenes and catalyze the borylation of furans, pyrroles, and electron-rich thiophenes. The selectivities complement those observed with most transition metal catalysts reported for this transformation.
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Affiliation(s)
- Marc-André Légaré
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, QC G1V 0A6, Canada
| | - Marc-André Courtemanche
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, QC G1V 0A6, Canada
| | - Étienne Rochette
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, QC G1V 0A6, Canada
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73
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Yang DT, Radtke J, Mellerup SK, Yuan K, Wang X, Wagner M, Wang S. One-Pot Synthesis of Brightly Fluorescent Mes2B-Functionalized Indolizine Derivatives via Cycloaddition Reactions. Org Lett 2015; 17:2486-9. [PMID: 25915087 DOI: 10.1021/acs.orglett.5b00994] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Four new BMes2-functionalized indolizine derivatives (Mes = mesityl) have been prepared via the cycloaddition reaction between pyrido[2,1-a]isoindole (A) or pyrrolo[1,2-a]pyridine (B) and BMes2-containing alkynes. All four compounds are brightly blue or blue-green fluorescent with λ(em) = 428-495 nm and Φ = 0.27-0.68, depending on the substitution position of the BMes2 group. Experimental and TD-DFT computational data indicated that the primary electronic transitions responsible for the fluorescence of 1-4 are from HOMO to LUMO (π → π*) rather than charge transfer from N → B, which is in agreement with previous findings suggesting that the lone-pair on N is delocalized throughout the N-heterocycles.
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Affiliation(s)
- Deng-Tao Yang
- †Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Julian Radtke
- ‡Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Strasse 7, D-60438 Frankfurt am Main, Germany
| | - Soren K Mellerup
- †Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Kang Yuan
- †Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Xiang Wang
- †Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Matthias Wagner
- ‡Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Strasse 7, D-60438 Frankfurt am Main, Germany
| | - Suning Wang
- †Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
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74
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Kushida T, Shuto A, Yoshio M, Kato T, Yamaguchi S. A Planarized Triphenylborane Mesogen: Discotic Liquid Crystals with Ambipolar Charge-Carrier Transport Properties. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502678] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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75
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Kushida T, Shuto A, Yoshio M, Kato T, Yamaguchi S. A Planarized Triphenylborane Mesogen: Discotic Liquid Crystals with Ambipolar Charge-Carrier Transport Properties. Angew Chem Int Ed Engl 2015; 54:6922-5. [DOI: 10.1002/anie.201502678] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Indexed: 02/04/2023]
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76
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Asakawa H, Lee KH, Furukawa K, Lin Z, Yamashita M. Lowering the reduction potential of a boron compound by means of the substituent effect of the boryl group: one-electron reduction of an unsymmetrical diborane(4). Chemistry 2015; 21:4267-71. [PMID: 25639658 DOI: 10.1002/chem.201406609] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Indexed: 11/11/2022]
Abstract
We have clarified and observed the high electron affinity of pinB-BMes2 (1; Mes = mesityl, pin = pinacolato). By using electrochemistry, it was shown that 1 has a higher electron affinity than those of B2pin2 and Mes3B. One-electron reduction of 1 gave the corresponding radical anion. The ESR spectroscopy and DFT calculation revealed the unsymmetrical distribution of electron density over the B-B bond. UV/Vis spectroscopy showed that the SOMO-related absorption supports the deep purple color of the radical anion. DFT studies on the torsion angle dependency of the LUMO levels and relative energies revealed the reason why 1 has high electron affinity as a result of the substituent effect of the Bpin group.
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Affiliation(s)
- Hiroki Asakawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, 112-8551 Tokyo (Japan) http://www.chem.chuo-u.ac.jp/∼element/index-e.html
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77
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Zhang Z, Edkins RM, Nitsch J, Fucke K, Steffen A, Longobardi LE, Stephan DW, Lambert C, Marder TB. Optical and electronic properties of air-stable organoboron compounds with strongly electron-accepting bis(fluoromesityl)boryl groups. Chem Sci 2015; 6:308-321. [PMID: 28966759 PMCID: PMC5586071 DOI: 10.1039/c4sc02410a] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 10/01/2014] [Indexed: 12/21/2022] Open
Abstract
Three compounds with phenyl (1), 4-tert-butylphenyl (2) and 4-N,N-diphenylaminophenyl (3) groups attached to bis(fluoromesityl)boryl ((FMes)2B) through B-C bonds have been prepared. The restricted rotation about the B-C bonds of boron-bonded aryl rings in solution has been studied by variable-temperature 19F NMR spectroscopy, and through-space F-F coupling has been observed for 3 at low temperature. Steric congestion inhibits binding of 1 by Lewis bases DABCO and tBu3P and the activation of H2 in their presence. Photophysical and electrochemical studies have been carried out on 2, 3, and an analogue of 3 containing a bis(mesityl)boryl ((Mes)2B) group, namely 4. Both 2 and 3 show bright emission in nonpolar solvents and in the solid-state, very strong electron-accepting ability as measured by cyclic voltammetry, and good air-stability. In addition, 2 displayed unusually long-lived emission (τ = 2.47 s) in 2-MeTHF at 77 K. The much stronger acceptor strength of (FMes)2B than (Mes)2B leads to significantly red-shifted emission in solution and the solid state, stronger emission solvatochromism, and significantly lower reduction potentials. Theoretical calculations confirm that 2 and 3 tend to form highly twisted excited states with good conjugation between one FMes group and the boron atom, which correlate well with their blue-shifted solid-state emissions and low kr values in solution.
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Affiliation(s)
- Zuolun Zhang
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Robert M Edkins
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Jörn Nitsch
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Katharina Fucke
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
- School of Medicine , Pharmacy and Health , Durham University , University Boulevard , Stockton-on-Tees , TS17 6BH , UK
| | - Andreas Steffen
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Lauren E Longobardi
- Department of Chemistry , University of Toronto , 80 St. George St. , Toronto , Ontario M5S 3H6 , Canada
| | - Douglas W Stephan
- Department of Chemistry , University of Toronto , 80 St. George St. , Toronto , Ontario M5S 3H6 , Canada
| | - Christoph Lambert
- Institut für Organische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany
| | - Todd B Marder
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
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78
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Zhang Z, Edkins RM, Nitsch J, Fucke K, Eichhorn A, Steffen A, Wang Y, Marder TB. D-π-A triarylboron compounds with tunable push-pull character achieved by modification of both the donor and acceptor moieties. Chemistry 2014; 21:177-90. [PMID: 25413782 DOI: 10.1002/chem.201405621] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Indexed: 11/07/2022]
Abstract
The push-pull character of a series of donor-bithienyl-acceptor compounds has been tuned by adopting triphenylamine or 1,1,7,7-tetramethyljulolidine as a donor and B(2,6-Me2 -4-RC6 H2)2 (R=Me, C6 F5 or 3,5-(CF3)2 C6 H3) or B[2,4,6-(CF3 )3 C6 H2]2 as an acceptor. Ir-catalyzed C-H borylation was utilized in the derivatization of the boryl acceptors and the tetramethyljulolidine donor. The donor and acceptor strengths were evaluated by electrochemical and photophysical measurements. In solution, the compound with the strongest acceptor, B[2,4,6-(CF3)3 C6 H2]2 ((FMes)2 B), has strongly quenched emission, while all other compounds show efficient green to red (ΦF =0.80-1.00) or near-IR (NIR; ΦF =0.27-0.48) emission, depending on solvent. Notably, this study presents the first examples of efficient NIR emission from three-coordinate boron compounds. Efficient solid-state red emission was observed for some derivatives, and interesting aggregation-induced emission of the (FMes)2 B-containing compound was studied. Moreover, each compound showed a strong and clearly visible response to fluoride addition, with either a large emission-color change or turn-on fluorescence.
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Affiliation(s)
- Zuolun Zhang
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany)
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