Polymer sorbents able to selectively capture specific classes of analytes have attracted significant interest in the context of photonic sensors (particularly waveguide-enhanced Raman spectroscopy, or WERS) for chemical warfare agents and industrial gases. We have developed a method for using aminopropyl methylsiloxane-dimethylsiloxane copolymers as inexpensive starting materials for the synthesis of new sorbents for chemical and biochemical sensing. Conversion of the starting polymer to a product sorbent can be accomplished via a simple, single-step reductive amination reaction with an aldehyde. Preliminary tests of a sorbent in the context of refractive index-based sensing of energetic compounds (explosives) using silicon nitride micoring resonators is also discussed.
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