Thienyltriazine Based Star Molecules: Synthesis and Properties

Thienyltriazine (TT) is a C3h symmetric system consisting of an acceptor core and donor arms. Here we report the design, synthesis and characterization of a series of aryl (naphthalene, NP; benzodithiophene, BDTP; BODIPY, BDPY; hexyl thiophene, HT; imidazole, IMZ; indole, IN) functionalized thienyltriazine containing star molecules (TTNP, TTBDTP, TTBDPY, TTHT, TTIMZ and TTIN). The electronic properties of these compounds in the solution were studied by ultraviolet-visible absorption and emission spectroscopies, and cyclic voltammetric studies. The star molecule (SM) consisting of thienyltriazine and BDPY unit (TTBDPY) shows the most red-shifted absorption and emission wavelength indicative of its most extended conjugation. The results of the experimental observations reveal that changing the nature of the peripheral aryl unit helps to efficiently tune the optical properties of the resulting system. A series of star molecules comprising of C3h symmetric thienyltriazine as the core and various peripheral arms such as naphthalene, benzodithiophene, BODIPY, hexyl thiophene, imidazole and indole have been synthesized and a structure-property relationship has been established.image

Automated summary

The design, synthesis, and characterization of a series of aryl functionalized thienyltriazine containing star molecules were reported. The results indicate that changing the nature of the peripheral aryl unit helps to efficiently tune the optical properties of the resulting system. A structure-property relationship has been established.