title: Generation-independent dimerization behavior of quadruple hydrogen-bond-containing oligoether dendrons.
abstract: [reaction: see text] A new series of self-assembling G1-G3 dendronized dimers bearing oligoether dendrons and a dimeric 2-ureido-4-pyrimidinone (UPy) quadruple hydrogen-bonding core were prepared and characterized. It was found that the nonpolar microenvironment created by the dendrons preserved the UPy unit in its DDAA tautomeric form. As a result, the stabilities of the dimers were exceptionally strong for all three generations (K(dim) > 2 x 10(7) M(-)(1) in CDCl(3) at 25 degrees C). Furthermore, the steric size of the dendrons did not exhibit a significant effect on their dimerization behavior.
authors.affiliation: Department of Chemistry and The Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR.
authors.forename: Chun-Ho
authors.initials: CH
authors.lastname: Wong
authors.forename: Hak-Fun
authors.initials: HF
authors.lastname: Chow
authors.forename: Sin-Kam
authors.initials: SK
authors.lastname: Hui
authors.forename: Kong-Hung
authors.initials: KH
authors.lastname: Sze