W. J. Pao, F. Zhang, P. A. Heiney, W.-D. Cho, C. Mitchell, V. Percec, Phys. Rev. E 67, 021601 (2003) (6 pages).
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 multi-chain 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.