Peter Skabara1
University of Glasgow1
We have developed a synthetic approach that allows us to synthesise monodisperse macromolecules on the gram scale. Our original targets are represented by the structures T1-T4, which consist of three fluorene-based arms of different lengths attached to a hexa-hexyl truxene core (macromolecules T1-T4).<sup>[1]</sup> In contrast to conjugated polymers, batches are prepared with 100% reproducibility and the products can be isolated in high purity. These attributes are extremely well valued, because subsequent work towards device optimisation (design, processing, annealing, etc) can rely on the consistent behaviour of the organic semiconductor. Such compounds have been made for purely photonic applications, such as organic lasers, downconvertors in hybrid LEDs and in visible light communications.<sup>[2]</sup><br/>Since the materials have been designed to be amorphous, their charge transport properties in the bulk are extremely low. Therefore, to open up the potential of star-shaped structures for applications such as OLEDs and OLETs, we designed novel core systems to improve aggregation in the solid state whilst retaining high levels of emission. In this talk, we present the synthesis and characterisation of the new materials <b>TriR</b> and <b>Ind3HBC</b>, based on soluble fused cores of graphene fragments.<br/>[1] A. L. Kanibolotsky, R. Berridge, P. J. Skabara, I. F. Perepichka, D. D. C. Bradley, M. Koeberg, J. Am. Chem. Soc., 2004, 126, 13695-13702<br/>[2] A. L. Kanibolotsky, N. Laurand, M. D. Dawson, G. A. Turnbull, I. D. W. Samuel and P. J. Skabara, Acc. Chem. Res., 2019, 52, 1665-1674