Abstract
A review. Boron-contg. mol. systems have received much attention under theor. aspects and from the side of synthetic org. chem. However, their potential for further applications such as optically interesting effects such as Non-Linear Optics (NLO), medical uses for Boron Neutron Capture Therapy (BNCT), or magnetism has been recognized only fairly recently. Mol. systems contg. boron offer particular mechanisms to accommodate unpaired electrons which may result in stable radicals as spin-bearing materials. Among such materials are organoboron compds. in which the prototypical electron deficient (10B, 11B) boron vs. carbon centers can accept and help to delocalize added electrons in a 2-dimensionally conjugated p system. Alternatively, oligoboron clusters BnXnk and the related carboranes or metallacarboranes are capable of adding or losing single electrons to form paramagnetic clusters with 3-dimensionally delocalized spin, according to combined exptl. studies and quantum chem. calcns. The unique nuclear properties of 10B are of therapeutic value if their selective transport via appended carbon nanotubes, boron nanotubes, or magnetic nanoparticles can be effected. on SciFinder(R)
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