Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1442051 | Synthetic Metals | 2011 | 5 Pages |
A new 3-formyl-2,3′-biimidazo[1,2-a]pyridin-2′-one radical was synthesized via Vilsmeier reaction under mild conditions, which exists as 1D double-stranded chain formed by lateral close contacts between π-dimers. Its perchlorate salt exists as 1D slipped π-stacking chain. The different stacking structures obviously affect their magnetic and photoluminescence properties in solid state. Neutral radical shows a dominant antiferromagnetic interaction between radicals and the magnetic phase transition at ∼72 K, while radical salt exhibits a strong irreversibility between FC and ZFC states, attributed to the anisotropic contraction and nonuniform slippage of π-stacking chain.
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