the invention relates to a novel family of oligomeric and polymeric s - triazine and s - heptazine derivatives and to their use as an intermediate , e . g . as precursors for producing si // c / n / ceramics , as mesoporous materials such as , e . g ., catalyst carriers for storing gas or as a stationary phase for chromatography , as flameproofing agents , plastic additives or for other organic / inorganic functional materials .