The thermal behaviour of poly(3-octylthienylene) synthesized by an Ni-based catalyst: DSC, optical microscopy and XRD analyses

Highly regioregular poly(3-alkylthiophenes): a new synthetic route and characterization of the resulting polymers

“…The presence of three order of the same crystallographic direction (d = 17.8 Å ) and another peak (d = 3.8 Å ) is evident. On the basis of the previous studies on PATs [10] the first spacing is attributed to the interdigitation of side chains, while the second one is due to the main chain facing. From powder XRD it cannot be concluded that the crude polymer prefers smectic rather than 3D organization.…”

Structural and Thermal Behavior of Poly (3-octylthiophene): a DSC,13C MAS NMR, XRD, Photoluminescence, and Raman Scattering Study

“…[11] The crude polymer was dissolved in the minimum amount of chloroform and precipitated in methanol and subsequently extracted with acetone: the residue to acetone extraction was used in this work. Head to tail connection was found to be 90% as determined by 1 H NMR in CDCl 3 solution.…”

“…On the basis of a study performed in a previous work, [11] we have assigned the peaks at 2h values of 4 Indeed, the presence of two different crystallographic phases is a common feature also to highly regioregular PATs. In fact, we have found [13] that highly regioregular poly[(3-hexylmethoxy)-2,5-thienylene] (P6OMe) shows at RT a phase isomorphous to Phase II mentioned above, while at 110 8C, above an endothermic transition detected by DSC, a pattern equivalent to Phase I has been observed.…”

“…Previous works [11,13] indicated that Phase II undergoes a transition into Phase I, and that this transition is clearly observed by optical microscopy, XRD, and DSC techniques.…”

“…A low deviation from coplanarity of the thiophene adjacent monomers was also observed by means of FT IR techniques. [11] 13 C CP MAS NMR Investigation…”