Neutron reflectivity and structure of polyether dendrimers as langmuir films

P. M. Saville, P. A. Reynolds, J. W. White*, C. J. Hawker, Jean Frechet, K. L. Wooley, J. Penfold, J. R.P. Webster

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

115 Scopus citations

Abstract

Neutron reflectivity and Π-A isotherm measurements of Langmuir films of polyether dendrimers based on 3,5-dihydroxybenzyl alcohol have elucidated the structure of these interesting molecules at the air-water interface. The neutron reflectivity measurements indicated a collapse of the fourth-generation monodendron, [G-4]-OH, to a bilayer structure. The molecules in the layer next to the water interface were ellipsoidal in structure due to compression and contained a volume fraction of about 25% of the substrate water. The molecules in the layer next to air were spherical with a diameter of 21 Å and contained no water. Isotherm measurements of the monodendron and tridendron series indicated scaling relationships between the area per molecule and the molecular weights of these species.

Original languageEnglish (US)
Pages (from-to)8283-8289
Number of pages7
JournalJournal of Physical Chemistry
Volume99
Issue number20
DOIs
StatePublished - Jan 1 1995

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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