BRABOREC Jakub J. E. Purkyne University in Usti nad Labem

Tuning the Photophysical Properties of Anti-B18H22

Co-authors ČERNÁ Hana, BENKOCKÁ Monika, KOLSKÁ Zdeňka, LONDESBOROUGH G.S. Michael

The tuning of the photophysical properties of the highly fluorescent boron hydride cluster anti-B18H22 (1), by straight-forward chemical substitution to produce 4,4’-(HS)2-anti-B18H20 (2), facilitates intersystem crossing from excited singlet states to a triplet manifold.[1] This subsequently enhances O2(1Δg) singlet oxygen production from a quantum yield of ΦΔ~ 0.008 in 1 to 0.59 in 2. This contribution describes the synthesis and full structural characterization of the new compound 4,4’-(HS)2-anti-B18H20 (2) and uses UV-vis spectroscopy coupled with DFT and ab initio computational studies to delineate and explain its photophysical properties. Additionally, we will report on new fluorescent derivatives of anti-B18H22 and their immobilisation on solid nanostructured substrates. ACKNOWLEDGEMENT This work was partially supported by the internal grant of the J. E. Purkinje University in Ústí nad Labem in the Czech Republic (SGA project 5322215000101). [1] V. Sauri, J. M. Oliva, D. Hnyk, J. Bould, J. Braborec, M. Merchán, I. Cisarova, P. Kubat, K. Lang, and M.G.S. Londesborough, Inorg. Chem., 2013, 52, 9266-9274.