0000000000970862

AUTHOR

Tomáš Polívka

showing 2 related works from this author

Distinct Photophysics of the Isomers of B18H22 Explained

2012

The photophysics of the two isomers of octadecaborane(22), anti- and syn-B 18H 22, have been studied by UV-vis spectroscopic techniques and theoretical computational methods. In air-saturated hexane, anti-B 18H 22 shows fluorescence with a high quantum yield, Φ F = 0.97, and singlet oxygen O 2( 1Δ g) production (Φ Δ ∼ 0.008). Conversely, isomer syn-B 18H 22 shows no measurable fluorescence, instead displaying much faster, picosecond nonradiative decay of excited singlet states. Computed potential energy hypersurfaces (PEHs) for both isomers rationalize these data, pointing to a deep S 1 minimum for anti-B 18H 22 and a conical intersection (CI) between its S 0 and S 1 states that lies 0.51 e…

CzechPhotochemistryChemistryFoundation (engineering)Library science02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesFluorescencelanguage.human_language0104 chemical sciencesInorganic ChemistryIsomerismlanguagemedia_common.cataloged_instanceSpectrophotometry UltravioletChristian ministryPhysical and Theoretical ChemistryEuropean unionBoranes0210 nano-technologymedia_commonInorganic Chemistry
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A Series of Ultra-Efficient Blue Borane Fluorophores

2020

13 pags., 14 figs., 5 tabs.

Active laser mediumSeries (mathematics)010405 organic chemistryHydridechemistry.chemical_elementBoraneAlkylation010402 general chemistryLaser01 natural sciencesCombinatorial chemistry0104 chemical scienceslaw.inventionInorganic Chemistrychemistry.chemical_compoundchemistrylawPhysical and Theoretical ChemistryBoron
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