Click procedure of phthalocyanine star-shaped mesogens – the effect of size and spacer length

ABSTRACT

A new Click procedure have been recently presented, in which a mixture of a female piece (star mesogen with shape-persistent conjugated arms and intrinsic free space) and a male building block (the same star mesogen sterically overcrowded with fullerenes attached via spacers to the arms) self-assemble in highly ordered filled liquid crystal structures. This self-assembly is based on the space-filling of the intrinsic free space and the nanosegregation of the fullerenes in helices. Here we highlight the synthesis of larger phthalocyanine star mesogens and fullerenes attached via long spacers and their mixtures as well as mixtures of the components with the stars of intermediate size and spacer length. While the system with long spacers do not show any alignment and π-stacking, the click procedure reappears successfully for the combination of a large female star and the intermediate male star.

GRAPHICAL ABSTRACT

KEYWORDS:

• Click procedures
• fullerene mesogens
• shape-amphiphile
• nanosegregation
• phthalocyanine
• photovoltaic

Acknowledgments

We are grateful to the Deutsche Forschungsgemeinschaft (DFG) for their financial support within the projects LE1571/5-1 and LE1571/8-1.

Disclosure statement

No potential conflict of interest was reported by the authors.

Supplemental Material

Supplemental data for this article can be accessed here.

Additional information

Funding

This work was supported by the Deutsche Forschungsgemeinschaft [LE1571/5-1, LE1571/8-1].