New family of aminophenalenyl-based neutral radical molecular conductors: synthesis, structure, and solid state properties.
We report the preparation, crystallization, and solid-state characterization of the first members of a new family of spiro-bis-(1,9-diamino-substituted-phenalenyl)boron neutral radicals. The crystal structures show that the three radicals are monomeric and without close contacts in the crystal lattice. In all cases magnetic susceptibility measurements confirm the presence of free radicals with one unpaired spin per molecule. Two of the new radical compounds are among the most highly conducting neutral organic solids, with room-temperature conductivities reaching sigma(RT) = 4 x 10(-2) S/cm. The measured conductivities correlate with the closest intermolecular contacts in the solid state and with the calculated band dispersions, even though the bandwidths are much smaller than those found in other organic conductors.
Mandal
Swadhin K
SK
Department of Chemistry, University of California, Riverside, California 92521-0403, USA.
Itkis
Mikhail E
ME
Chi
Xiaoliu
X
Samanta
Satyabrata
S
Lidsky
David
D
Reed
Robert W
RW
Oakley
Richard T
RT
Tham
Fook S
FS
Haddon
Robert C
RC