Adsorption, Desorption, and Reaction of 1-Octyl-3-methylimidazolium Tetrafluoroborate, [C₈C₁Im][BF₄], Ionic Liquid Multilayers on Cu(111).
Adsorption, Desorption, and Reaction of 1-Octyl-3-methylimidazolium Tetrafluoroborate, [C₈C₁Im][BF₄], Ionic Liquid Multilayers on Cu(111).
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Cu(111) 上离子液体多层膜 1-辛基-3-甲基咪唑四氟硼酸盐 [C8C1Im][BF4] 的吸附、解吸和反应。
DOI:
10.1021/acs.langmuir.5b02932
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Robert G. Jones
中科院分区:
文献类型:
--
作者:
K. Syres;Robert G. Jones
Multilayers of 1-octyl-3-methylimidazolium tetrafluoroborate [C8C1Im][BF4] have been deposited on a Cu(111) surface by evaporation in UHV. XPS shows that [C8C1Im][BF4] adsorbs without decomposition for substrate temperatures < 300 K. XPS and UPS data indicate that ionic liquid (IL) deposition onto a 120 K Cu(111) surface results in the IL forming multilayers by a simultaneous-multilayer growth process. IL deposition onto a room temperature Cu(111) surface results in a different arrangement where at a coverage of one monolayer the IL forms droplets of about 100 Å height covering only about 1/10th of the surface. Multilayers deposited at 120 K convert to the room temperature arrangement upon heating. Further heating above room temperature causes the IL multilayer droplets to desorb leaving an IL monolayer of ≈6 Å thickness at ≈430 K. At higher temperatures, this monolayer reacts with the surface and BF3 is emitted, leaving products containing C, N, and some F on the surface. We propose a surface reaction where [BF4](-) ions react to form chemisorbed fluorine (Cu-F) and gaseous BF3, with the remaining [C8C1Im](+) decomposing on the Cu(111) in an unidentified manner.
DOI:
10.1039/c3sc52237g
发表时间:
2014
期刊:
Chem. Sci.
影响因子:
--
作者:
McIntosh E
通讯作者:
McIntosh E
影响因子:
3.3
作者:
Armstrong, James P.;Hurst, Christopher;Villar-Garcia, Ignacio J.
通讯作者:
Villar-Garcia, Ignacio J.
影响因子:
3.3
作者:
Foulston, Richard;Gangopadhyay, Subhashis;Jones, Robert G.
通讯作者:
Jones, Robert G.