Počet záznamů: 1  

A Non-Exploding Alkali Metal Drop on Water: From Blue Solvated Electrons to Bursting Molten Hydroxide

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    0466842 - ÚOCHB 2017 RIV DE eng J - Článek v odborném periodiku
    Mason, Philip E. - Buttersack, T. - Bauerecker, S. - Jungwirth, Pavel
    A Non-Exploding Alkali Metal Drop on Water: From Blue Solvated Electrons to Bursting Molten Hydroxide.
    Angewandte Chemie - International Edition. Roč. 55, č. 42 (2016), s. 13019-13022. ISSN 1433-7851. E-ISSN 1521-3773
    Grant CEP: GA ČR(CZ) GBP208/12/G016
    Institucionální podpora: RVO:61388963
    Klíčová slova: sodium potassium alloy * water * hydrated electrons
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 11.994, rok: 2016

    Alkali metals in water are always at the brink of explosion. Herein, we show that this vigorous reaction can be kept in a non-exploding regime, revealing a fascinating richness of hitherto unexplored chemical processes. A combination of high-speed camera imaging and visible/near-infrared/infrared spectroscopy allowed us to catch and characterize the system at each stage of the reaction. After gently placing a drop of a sodium/potassium alloy on water under an inert atmosphere, the production of solvated electrons became so strong that their characteristic blue color could be observed with the naked eye. The exoergic reaction leading to the formation of hydrogen and hydroxide eventually heated the alkali metal drop such that it became glowing red, and part of the metal evaporated. As a result of the reaction, a perfectly transparent drop consisting of molten hydroxide was temporarily stabilized on water through the Leidenfrost effect, bursting spectacularly after it had cooled sufficiently.
    Trvalý link: http://hdl.handle.net/11104/0265053

     
     
Počet záznamů: 1  

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