Substituent Effects on the Fluorescence Properties of ortho-Carboranes: Unusual Emission Behaviour in C-(2 '-Pyridyl)-ortho-carboranes

Böhling L, Brockhinke A, Kahlert J, Weber L, Harder RA, Yufit DS, Howard JAK, MacBride JAH, Fox MA (2016)
European Journal of Inorganic Chemistry (3): 403-412.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Seventeen compounds including the parent ortho-, meta- and para-carboranes and derivatives of ortho-carborane were investigated for luminescence in cyclohexane and dichloromethane solutions. Fifteen of these carboranes revealed very weak emissions in the 285-493 nm range. These carboranes may arguably be viewed as non-emissive in solutions at room temperatures. No emissions could be observed for 1,2-dimethyl-ortho-carborane and 2-methyl-1-phenyl-ortho-carborane. The carboranes with a 2'-pyridyl substituent at the cluster carbon atom gave unusual local and charge-transfer emissions indicating that different excited states are generated on photoexcitation. Of all the carboranes investigated, only 2-(diphenylphosphino)-1-phenyl-ortho-carborane, 1,2-diphenyl-ortho-carborane and 1-phenyl-2-(2'-pyridyl)-ortho-carborane are luminescent in the solid state with emissions at 476-612 nm and large Stokes shifts of 12000-13600 cm(-1). The solid-state structures of 1,2-bis(2'-pyridyl)-and 1-phenyl-2-(2'-pyridyl)-orthocarborane were determined by X-ray crystallography.
Stichworte
Carboranes
Erscheinungsjahr
2016
Zeitschriftentitel
European Journal of Inorganic Chemistry
Ausgabe
3
Seite(n)
403-412
ISSN
1434-1948
eISSN
1099-0682
Page URI
https://pub.uni-bielefeld.de/record/2901352

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Böhling L, Brockhinke A, Kahlert J, et al. Substituent Effects on the Fluorescence Properties of ortho-Carboranes: Unusual Emission Behaviour in C-(2 '-Pyridyl)-ortho-carboranes. European Journal of Inorganic Chemistry. 2016;(3):403-412.
Böhling, L., Brockhinke, A., Kahlert, J., Weber, L., Harder, R. A., Yufit, D. S., Howard, J. A. K., et al. (2016). Substituent Effects on the Fluorescence Properties of ortho-Carboranes: Unusual Emission Behaviour in C-(2 '-Pyridyl)-ortho-carboranes. European Journal of Inorganic Chemistry(3), 403-412. doi:10.1002/ejic.201501284
Böhling, L., Brockhinke, A., Kahlert, J., Weber, L., Harder, R. A., Yufit, D. S., Howard, J. A. K., MacBride, J. A. H., and Fox, M. A. (2016). Substituent Effects on the Fluorescence Properties of ortho-Carboranes: Unusual Emission Behaviour in C-(2 '-Pyridyl)-ortho-carboranes. European Journal of Inorganic Chemistry, 403-412.
Böhling, L., et al., 2016. Substituent Effects on the Fluorescence Properties of ortho-Carboranes: Unusual Emission Behaviour in C-(2 '-Pyridyl)-ortho-carboranes. European Journal of Inorganic Chemistry, (3), p 403-412.
L. Böhling, et al., “Substituent Effects on the Fluorescence Properties of ortho-Carboranes: Unusual Emission Behaviour in C-(2 '-Pyridyl)-ortho-carboranes”, European Journal of Inorganic Chemistry, 2016, pp. 403-412.
Böhling, L., Brockhinke, A., Kahlert, J., Weber, L., Harder, R.A., Yufit, D.S., Howard, J.A.K., MacBride, J.A.H., Fox, M.A.: Substituent Effects on the Fluorescence Properties of ortho-Carboranes: Unusual Emission Behaviour in C-(2 '-Pyridyl)-ortho-carboranes. European Journal of Inorganic Chemistry. 403-412 (2016).
Böhling, Lena, Brockhinke, Andreas, Kahlert, Jan, Weber, Lothar, Harder, Rachel A., Yufit, Dmitry S., Howard, Judith A. K., MacBride, J. A. Hugh, and Fox, Mark A. “Substituent Effects on the Fluorescence Properties of ortho-Carboranes: Unusual Emission Behaviour in C-(2 '-Pyridyl)-ortho-carboranes”. European Journal of Inorganic Chemistry 3 (2016): 403-412.