New Family of Aminophenalenyl-Based Neutral Radical Molecular Conductors: Synthesis, Structure, and Solid State Properties

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• 作者：Swadhin K. Mandal ; Mikhail E. Itkis ; Xiaoliu Chi ; Satyabrata Samanta ; David Lidsky ; Robert W. Reed ; Richard T. Oakley ; Fook S. Tham ; and Robert C. Haddon
• 刊名：Journal of the American Chemical Society
• 出版年：2005
• 出版时间：June 8, 2005
• 年：2005
• 卷：127
• 期：22
• 页码：8185 - 8196
• 全文大小：315K
• 年卷期：v.127,no.22(June 8, 2005)
• ISSN：1520-5126

文摘

We report the preparation, crystallization, and solid-state characterization of the first membersof a new family of spiro-bis-(1,9-diamino-substituted-phenalenyl)boron neutral radicals. The crystal structuresshow that the three radicals are monomeric and without close contacts in the crystal lattice. In all casesmagnetic susceptibility measurements confirm the presence of free radicals with one unpaired spin permolecule. Two of the new radical compounds are among the most highly conducting neutral organic solids,with room-temperature conductivities reaching _RT = 4 × 10^-2 S/cm. The measured conductivities correlatewith the closest intermolecular contacts in the solid state and with the calculated band dispersions, eventhough the bandwidths are much smaller than those found in other organic conductors.