Pyridine dodecasil

Preparation of Pyridine Dodecasil-3C. A 2.2 M aqueous HF solution was prepared by dilution of 8.84 mL of 49 wt% HF solution with 108 mL of deionized water. A... 

There has not been a great deal of work in utilizing the zeolite-organic nanocomposites directly in materials applications. Recently pyridine (C5HnN)-incorpo-rated ZSM-39 and Dodecasil-3C zeolites have been synthesized" and these... 

Classical SDAs such as alkylamines or alkylammonium cations, which were mentioned in the second part of this article, do not possess special properties which would make them of interest for the construction of materials. Aromatic molecules, in contrast, can be equipped with many different properties. For example, they can act as chromophores, may possess large hyperpolarizabilities (for NLO applications such as SHG, cf the pNA molecule) or stabilize special electronic structures like radicals. However, aromatic molecules are notoriously poor SDAs. One of the few exceptions is pyridine. The hydrothermal treatment of a pyridine - HF - H2O silica solution at 190°C, for instance, results in the formation of large crystals of dodecasil 3C, a clathrasil with small cages. These crystals, which can grow to millimeter size, are acentric at room temperature and exhibit SHG, although the effect is only weak [37]. 

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