1116113-69-9Relevant articles and documents
Synthesis, optical, and electronic properties of soluble poly-p-phenylene oligomers as models for molecular wires
Banerjee, Moloy,Shukla, Ruchi,Rathore, Rajendra
supporting information; experimental part, p. 1780 - 1786 (2009/07/25)
A homologous series of soluble poly-p-phenylenes containing up to eight phenylene moieties(pp2-pp8)with branched iso-alkyl(or bis-n-alkylmethyl)groups has been synthesized and the structure-property relationship with regards to various optical and electronic properties established. All electronic and optoelectronic properties of poly-p-phenylenes followed a 1/n relationship(where n is number of phenylene moieties)with the increasing number of phenylene moieties. The low-energy electronic transition of the pp2-PP7 cation radicals, generated either by laser-flash photolysis or by chemical oxidation,varied as well according to the inverse(1/n)relationship. The observed inverse relationship of all measured electronic and optoelectronic prope rties against the increasing number of phenylene units in various ppn's, as well as X-ray crystallography of both neutral and a cation-radical salt of a representative tetra-p-phenylene oligomer allows us to demonstrate that the effective conjugation length in poly-p-phenylenes is, in part, controlled by the increasing number of interactions of ortho hydrogens which may prevent simultaneous planarization of the continuous arrays of a large number of phenylene moieties.
