129839-57-2Relevant 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 (2007/10/03)
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.
Nematic Liquid Crystal Containing Diaza-18-Crown Ether Unit
Minggui, Xie,Jun, Qin,Feng, Hong,Liangyu, Wang
, p. 309 - 318 (2007/10/02)
Three diaza-18-crown-6 carrying aryl ester structural unit were synthesized and shown to nematic liquid crystalline properties.The influence of the molecular structure on liquid crystalline properties was studied.It has been found that whether the complexes display liquid crystalline properties depends upon structure of anions.The influence of doping inorganic salt on the clear point was also studied.
