@article {9833,
	title = {Spontaneous Hierarchical Assembly of Crown Ether-like Macrocycles into Nanofibers and Microfibers Induced by Alkali-Metal and Ammonium Salts.},
	journal = {Chemistry{\textendash}A European Journal},
	volume = {16},
	year = {2010},
	note = {CAPLUS AN 2010:220006(Journal)},
	month = {2010///},
	pages = {2453-2460, S2453/1-S2453/11},
	publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA},
	abstract = {Schiff base macrocycle 1, which has a crown ether like central pore, was combined with different alkali-metal and ammonium salts in chloroform, resulting in one-dimensional supramol. aggregates. The ion-induced self-assembly was studied with solid-state NMR spectroscopy, transmission electron microscopy (TEM), SEM, and at. force microscopy (AFM). It was found that the lengths and widths of the superstructures depend on the cation and counter-anion of the salts. Among the salts being used, Na+ and NH4+ ions with BF4- ions showed the most impressive fibrous structures that can grow up to 1 μm in diam. and hundreds of microns in length. In addn., the size of the fibers can be controlled by the evapn. rate of the solvent. A new macrocycle with bulky triptycenyl substituents that prevent supramol. assembly was prepd. and did not display any nanofibers with alkali-metal ions in chloroform when studied with TEM. [on SciFinder(R)]},
	keywords = {spontaneous hierarchical assembly crown ether like macrocycle nanofiber microfiber},
	isbn = {0947-6539},
	author = {Hui,Joseph K.-H. and Frischmann,Peter D. and Tso,Chien-Hsin and Michal,Carl A. and MacLachlan,Mark J.}
}
