DIAMOND MOLECULES FOUND IN PETROLEUM New Members of the H-Terminated Diamond Series

摘要

We recently reported the discovery and isolation of new members of the hydrogen-terminated diamond series, ～1 to ～2 nm sized higher diamondoids from petroleum. Crystallographic studies revealed a wealth of diamond molecules that are nanometer-sized rods, helices, discs, pyramids, etc. Highly rigid, well-defined, readily derivatizable structures make them valuable molecular building blocks for nanotechnology. We now produce certain higher diamondoids in gram quantities. Although more stable than graphite particles of comparable size, higher diamondoids are extraordinarily difficult to synthesize. Attempts to synthesize them were abandoned in the 1980's. We examined extracts of diamond-containing materials synthesized by CO_2 laser-induced gas-phase synthesis and commercial CVD in an attempt to detect diamantane to undecamantane. However, high-sensitivity GCMS detected no diamondoids in these materials.