Boron-Locked Starazine - A Soluble and Fluorescent Analogue of Starphene

A starlike heterocyclic molecule containing an electron-deficient nonaaza-core structure and three peripheral isoquinolines locked by three tetracoordinate borons, namely isoquinoline-nona-starazine (QNSA), is synthesized by using readily available reactants through a rather straightforward approach. This new heteroatom-rich QNSA possesses a quasi-planar pi-backbone structure, and bears phenyl substituents on borons which protrude on both sides of the pi-backbones endowing it with good solubility in common organic solvents. Contrasting to its starphene analogue, QNSA shows intense fluorescence with a quantum yield (PLQY) of up to 62 % in dilute solution.

Automated summary

In this study, a new starlike heterocyclic molecule, QNSA, was synthesized via a straightforward approach. QNSA exhibits intense fluorescence in dilute solution, with a quantum yield of up to 62%.