Dendrons G(n)-Cl and G(n)-NH (n = 2-4) and novel dendrimers G(n)-N similar to N-G(n) (n = 2-4) based on triazine and piperazine units were efficiently prepared in good yields without employing the protection and deprotection processes and are fully characterized by H-1 NMR and C-13 NMR spectroscopies, elemental analysis, and mass spectroscopy. These compounds are transparent and possess good thermal stability. G(4)-Cl shows a monotropic columnar phase in a narrow range with a coexisting crystalline phase. Dendron G(4)-NH shows a rectangular column-phase, and dendrimer G(4)-N similar to N-G(4) exhibits a monotropic hexagonal columnar phase. These identifications were supported by the polarizing optical scope and powder XRD studies.
