Synthesis and characterisation of 3-armed dendritic molecules with triphenylbenzene or triphenyltriazine as core and triphenylene derivative as shells

Abstract

Two series 3-armed dendritic molecules with their 1,3,5-tris(4-methyloxyphenyl) benzene or 2,4,6-tris(4- hydroxylphenyl)-1,3,5-s-triazine core and triphenylene derivative shells connected by soft hydrocarbon chains have been synthesised and fully characterised. Whether liquid crystal (LC) or photoluminescence materials have been tuned by changing the length of the soft chain and they have been studied by POM, DSC, XRD, UV-Vis and PL. The results show that all the new dendritic compounds display UV to blue fluorescence in solvents such as DCM, THF and acetone. The TC3 compound bearing 1,3,5-tris(4-hydroxylphenyl) benzene core exhibits LC property with rectangular columnar phase (Col_r) on cooling.

Keywords:

• polycyclic aromatic hydrocarbons
• liquid crystal
• luminescence
• triphenylene
• triazine

Acknowledgement

We gratefully acknowledge professor Zhi-Yun Lu for the PL results analysis.

Additional information

Funding

This research was supported by the financial support from the National Nature Science Foundation of China (NSFC) [contract number 51073112]; the Foundation of Sichuan Normal University [contract number 14qn03], [contract number 15ZB0037].