Physicochemical Properties of Monolayers of a Gemini Surfactant with a Minimal-Length Spacer

Srikant Kumar Singh, Alfred Yeboah, Wei Bu, Pan Sun, Matthew F. Paige

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Fundamental physical chemical properties of monolayers formed from a new anionic gemini surfactant with a minimal-length (single-bond) spacer unit have been investigated at the air-water interface and compared with those of monolayers formed from affiliated comparator surfactants. The minimal spacer surfactant, dubbed C18-0-C18, exhibited strikingly different packing characteristics from an anionic gemini surfactant with a comparatively bulkier headgroup, including the formation of close-packed, crystalline films, and shared similar characteristics to simple fatty acid-based monolayers. Monolayers of C18-0-C18 also exhibited good stability at the air-water interface and transferred with reasonable efficiency to solid substrates, although the film integrity was compromised during the transfer. Results from this work suggest that the single-bond spacer approach might be more broadly useful for designing gemini surfactants that pack efficiently into ordered monolayers.

Original languageEnglish
Pages (from-to)16004-16013
Number of pages10
JournalLangmuir
Volume38
Issue number51
DOIs
StatePublished - Dec 27 2022
Externally publishedYes

Funding

S.S. thanks Dr. David Ci Yan for insightful discussions and help with designing the synthesis scheme for C-0-C. Financial support for this work has been provided by the Natural Sciences and Engineering Research Council, the Canadian Foundation for Innovation, and the University of Saskatchewan. NSF’s ChemMatCARS Sector 15 is supported by the Divisions of Chemistry (CHE) and Materials Research (DMR), the National Science Foundation, under grant number NSF/CHE-1834750. Use of the Advanced Photon Source, an Office of Science User Facility operated for the U.S. Department of Energy (DOE), Office of Science by Argonne National Laboratory, was supported by the U.S. DOE under contract no. DE-AC02-06CH11357. 18 18

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