Grazing-incidence x-ray diffraction study of Langmuir films of amphiphilic monodendrons

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Pao WJ, Zhang F, Heiney PA, Mitchell C, Cho WD, Percec V

Abstract:
We have used pressure-area isotherms and grazing-incidence x-ray diffraction to study structures of Langmuir films of first-generation monodendrons with two or three peripheral alkyl chains. Unlike the structures observed in their bulk liquid crystalline mesophases, these multichain monodendrons form either a centered rectangular lattice with molecular axes tilted toward nearest neighbors or an oblique lattice with molecular axes tilted in low-symmetry directions.