238740-03-9Relevant academic research and scientific papers
Langmuir films of amphiphilic crown ethers
Heiney, Paul A.,Stetzer, MacKenzie R.,Mindyuk, Oksana Y.,DiMasi, Elaine,McGhie, Andrew R.,Liu, Hu,Smith III, Amos B.
, p. 6206 - 6214 (1999)
We have used X-ray reflectivity and grazing-incidence X-ray diffraction to study amphiphilic crown ethers 1 and 2 at the air-water interface. A new synthetic route was employed, which substantially reduced the level of impurities. Unlike previous studies of 1, we saw no evidence of a first-order lying-down to standing-up transition of the alkyl tails. We did observe in both compounds a gradual reorientation of the tails away from the interface as the film was compressed, followed by an irreversible collapse to a multilayer structure. The monolayer films have a fluid-like inplane structure, while the multilayer films are crystalline. ? 1999 American Chemical Society.
