Glued Langmuir-Blodgett bilayers from calix[n]arenes: Influence of calix[n]arene size on ionic cross-linking, film thickness, and permeation selectivity

Journal Article · Mon Jul 12 00:00:00 EDT 2010 · Langmuir

DOI:https://doi.org/10.1021/la1020803· OSTI ID:1257295

Wang, Minghui ^[1]; Janout, Vaclav ^[2]; Regen, Steven L. ^[2]

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1. Lehigh Univ., Bethlehem, PA (United States); Massachusetts Institute of Technology
2. Lehigh Univ., Bethlehem, PA (United States)

A homologous series of calix[4]arene-, calix[5]arene- and calix[6]arene-based surfactants, containing pendant trimethylammonium and n-hexadecyl groups, have been compared with respect to their ability (i) to undergo ionic crosslinking at the air/water interface, (ii) to incorporate poly(4-styrenesulfonate) (PSS) in Langmuir-Blodgett (LB) bilayers, and (iii) to act as barriers towards He, N₂ and CO₂ when assembled into crosslinked LB bilayers. As these calix[n]arenes increase in size, their ability to undergo ionic crosslinking has been found to increase, the thickness of corresponding glued LB bilayers has been found to decrease, and their barrier properties and permeation selectivities have been found to increase. In conclusion, the likely origin for these effects and the probable mechanism by which He, N₂ and CO₂ cross these ultrathin films are discussed.

• Research Organization: Lehigh Univ., Bethlehem, PA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Grant/Contract Number: FG02-05ER15720
• OSTI ID: 1257295
• Journal Information: Langmuir, Journal Name: Langmuir Journal Issue: 15 Vol. 26; ISSN 0743-7463
• Publisher: American Chemical Society
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY