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UV\/Vis absorption experiments revealed that if the TTF units were oxidized to TTF<jats:sup>.+<\/jats:sup> radical cations, the two compounds could form a stable single molecular noncovalent macrocycle in less polar dichloromethane or dichloroethane or a bimolecular noncovalent macrocycle in a binary mixture of dichloromethane with a more polar solvent owing to remarkably enhanced dimerization of the TTF<jats:sup>.+<\/jats:sup> units. The stability of the (TTF<jats:sup>.+<\/jats:sup>)<jats:sub>2<\/jats:sub> dimer was evaluated through UV\/Vis absorption, electron paramagnetic resonance, and cyclic voltammetry experiments and also by comparing the results with those of control compound <jats:bold>2<\/jats:bold>. The results showed that introduction of the intramolecular hydrogen bonds played a crucial role in promoting the stability of the (TTF<jats:sup>.+<\/jats:sup>)<jats:sub>2<\/jats:sub> dimer and thus the noncovalent macrocyclization of the two backbones in both uni\u2010 and bimolecular manners.<\/jats:p>","DOI":"10.1002\/asia.201301729","type":"journal-article","created":{"date-parts":[[2014,2,19]],"date-time":"2014-02-19T07:34:15Z","timestamp":1392795255000},"page":"1039-1044","source":"Crossref","is-referenced-by-count":32,"title":["Tetrathiafulvalene\u2010Based Macrocycles Formed by Radical Cation Dimerization: The Role of Intramolecular Hydrogen Bonding and 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