As a building block of organic conducting ferromagnets, TTF-based dimeric d
onors and spin-polarized TTF donors have been prepared. As an extension of
the spin-polarized donor, spin-polarized polyradical donors which afford hi
gh spin cation polyradicals upon one-electron oxidation are documented. An
idea to realize a manipulating spin system composed of hyper-structured spi
n-polarized donors is also introduced.