Syntheses, structure, electrochemistry, and optical properties of 1,3-diethyl-2,3-dihydro-1-H-1,3,2-pyrido-[4,5-b]-diazaboroles

Weber L, Kahlert J, Stammler H-G, Neumann B (2008)
Zeitschrift für Anorganische und Allgemeine Chemie 634(10): 1729-1734.

Journal Article | Published | English

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Abstract
Reaction of 2,5-bis(dibromoboryl)thiophene (4) or 1,4-bis(dibromoboryl)benzene (6) with two equivalents of N,N'-dilithiated 2,3-diaminopyridine (3) led to the generation of the pyridodiazaboroles 5 and 7 in which the two diazaborole rings are linked by 2,5-thiophen-diyl or 1,4-phenylene units via the boron atom. The novel compounds were characterized by elemental analyses and spectroscopy (H-1-, B-11-, C-13-NMR, MS, and UV-VIS). The molecular structure of 5 was elucidated by X-ray diffraction. Cyclovoltammograms of 5 and 7 show two irreversible oxidation waves at 0.76 and 0.73 V, respectively vs Fc/Fc(+). The novel compounds display intense blue luminescence with Stokes shifts of 76 and 74 nm and relative quantum yields of 39 and 43% vs Coumarin 120 (phi = 50%).
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Weber L, Kahlert J, Stammler H-G, Neumann B. Syntheses, structure, electrochemistry, and optical properties of 1,3-diethyl-2,3-dihydro-1-H-1,3,2-pyrido-[4,5-b]-diazaboroles. Zeitschrift für Anorganische und Allgemeine Chemie. 2008;634(10):1729-1734.
Weber, L., Kahlert, J., Stammler, H. - G., & Neumann, B. (2008). Syntheses, structure, electrochemistry, and optical properties of 1,3-diethyl-2,3-dihydro-1-H-1,3,2-pyrido-[4,5-b]-diazaboroles. Zeitschrift für Anorganische und Allgemeine Chemie, 634(10), 1729-1734.
Weber, L., Kahlert, J., Stammler, H. - G., and Neumann, B. (2008). Syntheses, structure, electrochemistry, and optical properties of 1,3-diethyl-2,3-dihydro-1-H-1,3,2-pyrido-[4,5-b]-diazaboroles. Zeitschrift für Anorganische und Allgemeine Chemie 634, 1729-1734.
Weber, L., et al., 2008. Syntheses, structure, electrochemistry, and optical properties of 1,3-diethyl-2,3-dihydro-1-H-1,3,2-pyrido-[4,5-b]-diazaboroles. Zeitschrift für Anorganische und Allgemeine Chemie, 634(10), p 1729-1734.
L. Weber, et al., “Syntheses, structure, electrochemistry, and optical properties of 1,3-diethyl-2,3-dihydro-1-H-1,3,2-pyrido-[4,5-b]-diazaboroles”, Zeitschrift für Anorganische und Allgemeine Chemie, vol. 634, 2008, pp. 1729-1734.
Weber, L., Kahlert, J., Stammler, H.-G., Neumann, B.: Syntheses, structure, electrochemistry, and optical properties of 1,3-diethyl-2,3-dihydro-1-H-1,3,2-pyrido-[4,5-b]-diazaboroles. Zeitschrift für Anorganische und Allgemeine Chemie. 634, 1729-1734 (2008).
Weber, Lothar, Kahlert, Jan, Stammler, Hans-Georg, and Neumann, Beate. “Syntheses, structure, electrochemistry, and optical properties of 1,3-diethyl-2,3-dihydro-1-H-1,3,2-pyrido-[4,5-b]-diazaboroles”. Zeitschrift für Anorganische und Allgemeine Chemie 634.10 (2008): 1729-1734.
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