Organic polyradicals

Rajca, A. Wongsriratanakul, J. Rajca, S. Cemy, R. A Dendritic Macrocyclic Organic Polyradical With a Very High Spin of S = 10. Angew. Chem., Int. Ed. 1998, 37, 1229-1232. 

Rajca, A. (2004). Organic polyradical magnetic nanoclusters, In Encyclopedia of Nanoscience and Nanotechnology, Nalwa, H.S. (ed.), vol. 8, pp. 285-294. American Scientific Publishers, Stevenson Ranch, CA... 

Michinobu, T., Inui, J. and Nishide, H. (2003). m-phenylene-linked aromatic poly(am-inium cationic radicals persistent high-spin organic polyradicals. Org. Lett. 5, 2165-2168... 

Rajca, A. (1997). High-spin organic polyradicals as simple spin clusters. Mol. Cryst. Liq. Cryst. 305, 567-577... 

Rajca, A. (1999). High-Spin Organic Polyradicals. In Magnetic Properties of Organic Materials, Lahti, P.M. (ed.), Chapter 17, pp. 345-359. Marcel Dekker, New York... 

The first type of organic polyradicals is composed of an unconjugated backbone bearing highly stable radicals in its side chains. Such macromolecules can be synthesized from (i) the preparation and subsequent polymerization of a radical monomer containing a vinyl group, (ii) oxidation or reduction of a precursor macromolecule and (iii) introduction of a radical unit to a macromolecular backbone through a polymer reaction. For the example of (i), poly(4-methacryloyloxy-... 

Organic polyradicals are paramagnetic molecules with N unpaired electrons, which are described by the spin Hamiltonian in the introduction, subchapter B, on page 1 of this volume. 

The tables generally include only sp>ecies, the structure of which seems to be verified. Therefore many radicals, which were erroneously published as aminyl radicals, are not mentioned in this chapter and will show up under nitroxides. Some other aminyls ate listed under iminyl radicals. Data of biradicals and radical pairs ate considered in the chapter Organic Polyradicals in Vol. II/9d. 

Shiomi, D., Tamma, M., Sawa, H., Kato, R., and Kinoshita, M., Novel magnetic interactions in organic polyradical crystals based on nitronyl nitroxide, Synth. Met., 55-57, 3279, 1993. 

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