0000000000465111
AUTHOR
Jiří Dolanský
Substitution of the laser borane anti-B18H22 with pyridine: a structural and photophysical study of some unusually structured macropolyhedral boron hydrides
Reaction of anti-B18H221 with pyridine in neutral solvents gives sparingly soluble B16H18-3',8'-Py23a as the major product (ca. 53%) and B18H20-6',9'-Py22 (ca. 15%) as the minor product, with small quantities of B18H20-8'-Py 4 (ca. 1%) also being formed. The three new compounds 2, 3a and 4 are characterized by single-crystal X-ray diffraction analyses and by multinuclear multiple-resonance NMR spectroscopy. Compound 2 is of ten-vertex nido:ten-vertex arachno two-atoms-in-common architecture, long postulated for a species with borons-only cluster constitution, but previously elusive. Compound 3a is of unprecedented ten-vertex nido:eight-vertex arachno two-atoms-in-common architecture. The si…
Thermochromic Fluorescence from B18H20(NC5H5)2: An Inorganic–Organic Composite Luminescent Compound with an Unusual Molecular Geometry
BH(NCH) is a rare example of two conjoined boron hydride subclusters of nido and arachno geometrical character. At room temperature, solutions of BH(NCH) emit a 690 nm fluorescence. In the solid state, this emission is shifted to 620 nm and intensifies due to restriction of the rotation of the pyridine ligands. In addition, there is a thermochromicity to the fluorescence of BH(NCH). Cooling to 8 K engenders a further shift in the emission wavelength to 585 nm and a twofold increase in intensity. Immobilization in a polystyrene thin-film matrix results in an efficient absorption of pumping excitation energy at 414 nm and a 609 nm photostable fluorescence. Such fluorescence from polystyrene t…
Effect of Iodination on the Photophysics of the Laser Borane anti-B18H22: Generation of Efficient Photosensitizers of Oxygen
Treatment of the laser borane anti-B18H22 (compound 1) with iodine in ethanol gives the monoiodinated derivative 7-I-anti-B18H21 (compound 2) in 67% yield, or, by reaction with iodine or ICl in the presence of AlCl3 in dichloromethane, the diiodinated derivative 4,4'-I2-anti-B18H20 (compound 3) in 85% yield. On excitation with 360 nm light, both compounds 2 and 3 give strong green phosphorescent emissions (λmax = 525 nm, ΦL = 0.41 and λmax = 545 nm, ΦL = 0.71 respectively) that are quenched by dioxygen to produce O2(1Δg) singlet oxygen with quantum yields of ΦΔ = 0.52 and 0.36 respectively. Similarly strong emissions can be stimulated via the nonlinear process of two-photon absorption when …
Unveiling the role of upper excited electronic states in the photochemistry and laser performance of: anti -B18H22
13 pags., 7 figs., -- This article is part of the themed collection: Journal of Materials Chemistry C HOT Papers
CCDC 1441506: Experimental Crystal Structure Determination
Related Article: Michael G. S. Londesborough, Jiří Dolanský, Tomáš Jelínek, John D. Kennedy, Ivana Císařová, Robert D. Kennedy, Daniel Roca-Sanjuán, Antonio Francés-Monerris, Kamil Lang, William Clegg|2018|Dalton Trans.|47|1709|doi:10.1039/C7DT03823B
CCDC 1514165: Experimental Crystal Structure Determination
Related Article: Michael G. S. Londesborough, Jiří Dolanský, Luis Cerdán, Kamil Lang, Tomáš Jelínek, Josep M. Oliva, Drahomír Hnyk, Daniel Roca-Sanjuán, Antonio Francés-Monerris, Jiří Martinčík, Martin Nikl, John D. Kennedy|2017|Adv. Opt. Mater.|5|1600694|doi:10.1002/adom.201600694
CCDC 1859436: Experimental Crystal Structure Determination
Related Article: Michael G. S. Londesborough, Jiří Dolanský, Jonathan Bould, Jakub Braborec, Kaplan Kirakci, Kamil Lang, Ivana Císařová, Pavel Kubát, Daniel Roca-Sanjuán, Antonio Francés-Monerris, Lenka Slušná, Eva Noskovičová, Dušan Lorenc|2019|Inorg.Chem.|58|10248|doi:10.1021/acs.inorgchem.9b01358
CCDC 1441507: Experimental Crystal Structure Determination
Related Article: Michael G. S. Londesborough, Jiří Dolanský, Tomáš Jelínek, John D. Kennedy, Ivana Císařová, Robert D. Kennedy, Daniel Roca-Sanjuán, Antonio Francés-Monerris, Kamil Lang, William Clegg|2018|Dalton Trans.|47|1709|doi:10.1039/C7DT03823B
CCDC 1441504: Experimental Crystal Structure Determination
Related Article: Michael G. S. Londesborough, Jiří Dolanský, Tomáš Jelínek, John D. Kennedy, Ivana Císařová, Robert D. Kennedy, Daniel Roca-Sanjuán, Antonio Francés-Monerris, Kamil Lang, William Clegg|2018|Dalton Trans.|47|1709|doi:10.1039/C7DT03823B
CCDC 1859437: Experimental Crystal Structure Determination
Related Article: Michael G. S. Londesborough, Jiří Dolanský, Jonathan Bould, Jakub Braborec, Kaplan Kirakci, Kamil Lang, Ivana Císařová, Pavel Kubát, Daniel Roca-Sanjuán, Antonio Francés-Monerris, Lenka Slušná, Eva Noskovičová, Dušan Lorenc|2019|Inorg.Chem.|58|10248|doi:10.1021/acs.inorgchem.9b01358
CCDC 1441505: Experimental Crystal Structure Determination
Related Article: Michael G. S. Londesborough, Jiří Dolanský, Tomáš Jelínek, John D. Kennedy, Ivana Císařová, Robert D. Kennedy, Daniel Roca-Sanjuán, Antonio Francés-Monerris, Kamil Lang, William Clegg|2018|Dalton Trans.|47|1709|doi:10.1039/C7DT03823B