Journal of the American Chemical Society, Vol.123, No.25, 5942-5946, 2001
A nanometer-sized high-spin polyradical: Poly(4-phenoxyl-1,2-phenylenevinylene) planarily extended in a non-Kekule fashion and its magnetic force microscopic images
A pi -conjugated, but non-Kekule- and nondisjoint-type poly(1,2-phenylenevinylene) network bearing 4-substituted di-tert-butylphenoxyls was synthesized through a one-pot polycondensation of the star-shaped subpart and the subsequent oxidation, which was persistent even at room temperature. The polyphenoxyl radical with a spin concentration of 0.4 displayed an average S of 10/2. The polyradical with the molecular weight of 3.2 x 10(4) gave a disklike image of ca. 35 x 0.6 nm with both an atomic and a magnetic force microscopy: the molecular image was examined as a nanoscale and single-molecular-based magnetic dot.