Media type: E-Article Title: Synthesis of polymers containing regularly distributed tetrathia‐[7]‐elicene units along the backbone Contributor: Fenili, Fabio; Rigamonti, Clara; Bossi, Alberto; Ferruti, Paolo; Manfredi, Amedea; Maiorana, Stefano; Baldoli, Clara; Cauteruccio, Silvia; Licandro, Emanuela; Ranucci, Elisabetta imprint: Wiley, 2010 Published in: Journal of Polymer Science Part A: Polymer Chemistry Language: English DOI: 10.1002/pola.24260 ISSN: 0887-624X; 1099-0518 Keywords: Materials Chemistry ; Organic Chemistry ; Polymers and Plastics Origination: Footnote: Description: <jats:title>Abstract</jats:title><jats:p>A tetrathia‐[7]‐helicene bearing in the 2 and 13 positions cyanovinyl groups was used as comonomer in the Michael‐type polyaddition reaction with <jats:italic>N,N</jats:italic>′‐bis(β‐mercaptoethyl)piperazine. This led to a new polymer bearing tetrathia‐[7]‐helicene units regularly distributed along the polymer backbone, which may be regarded as the first example of a new family of potentially useful nonlinear optical materials. All products were structurally characterized by <jats:sup>1</jats:sup>H and <jats:sup>13</jats:sup>C NMR spectroscopy. Differential scanning calorimetry characterizations revealed the presence, in both monomeric and polymeric helicenes, of glass‐transition like temperatures, associated to some conformational variation of the helicene units. The optical properties, the film formation and the morphology of the polymer‐containing tetratia‐[7]‐helicenes were also investigated. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2010</jats:p>