Engineering nanorafts of calixarene polyphosphonates.
The water-soluble calix[4]arene bearing p-substituted phosphonic acid groups is accessible in five steps in overall 62 % yield, with the hydrogen-bonding prowess of the acidic groups dominating its self-assembly processes. These include the formation of 3.0(3) nm and 20(2) nm nanorafts of the calixarene in water using spinning disc processing, stabilized by acetonitrile, and nanorafts in the gas phase (<or=20 molecules). The 20(2) nm particles transform into 3.0(3) nm particles prior to crystallization into a compact bilayer, whereas crystallization in the presence of large organic molecules gives an expanded bilayer interposed by layers of water molecules.
Clark
Thomas E
TE
Department of Chemistry, The University of Western Australia, Crawley, WA 6009, Australia.
Makha
Mohamed
M
Sobolev
Alexandre N
AN
Rohrs
Henry
H
Atwood
Jerry L
JL
Raston
Colin L
CL
D047250:Calixarenes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008958:Models, Molecular; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction
D009943:Organophosphorus Compounds; D047250:Calixarenes; C020477:polyphosphonate