Synthesis, structure and optical properties of 2,4,6-tris(p-methylstyryl)-s-triazine

A new octupolar compound, 2, 4, 6-tris (p-methylstyryl)-s-triazine (TMSTA, C30H27N3), was synthesized. It has a molecular configuration of slightly curved planar triangle and crystallizes into the orthorhombic space group Pmn2(1). The crystal is SHG active with the powder SHG efficiency of 9.1 times as large as that of urea under 1064 nm input laser pulses. The maximum absorption peak (lambda(max)) in chloroform (1 x 10(-5) mol(.)L(-1)) is at 337 nm and there is no absorption above 400 run. The peak position in its fluorescence emission in acetonitrile is at 435 rm. It also has good thermal stability (the melting point of 235 similar to 237 degreesC).