Issue 5, 1988

Chiral sulphur-containing molecules in Langmuir–Blodgett films

Abstract

Long, straight alkane chains have been functionalised with sulphur-containing groups at the chain-end, near the chain-end and at the mid-chain. The behaviour of such compounds in Langmuir films has been investigated. Several gave stable monolayers from which molecular areas have been determined. Surface potential (ΔV) measurements carried out simultaneously with the pressure–area (πA) isotherms provided an important insight into the surface behaviour of some of the compounds. On compression, changes in the ΔVA characteristics were clearly visible, well before any significant changes occurred in the πA curves. New evidence presented here suggests also that the previous interpretation of the πA behaviour of C10H21SO(CH2)10CO2H in terms of molecular orientation was incorrect, dissolution of the monolayer in the water subphase at higher pressure being the most likely explanation. Attempts at depositing chiral L.B. multilayers of (+)-C18H37SO-p-tolyl were not successful because of crystallite formation on the quartz support. Multilayers of (+)-S-octadecyl cysteine were deposited successfully, albeit with a monolayer of stearic acid interposed every seven monolayers of the chiral compound. No optical rotation was observed in the films.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans. 1, 1988,84, 1531-1542

Chiral sulphur-containing molecules in Langmuir–Blodgett films

C. Georges, T. J. Lewis, J. P. Llewellyn, S. Salvagno, D. M. Taylor, C. J. M. Stirling and V. Vogel, J. Chem. Soc., Faraday Trans. 1, 1988, 84, 1531 DOI: 10.1039/F19888401531

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements