Potential carbon dioxide sensing based on recognition by trans-[carbonylhydroxybis-(triphenylphosphine)rhodium(I)] deposited on acoustic wave devices

Abstract

The transition metal complex trans-[carbonylhydroxybis-(triphenylphosphine)rhodium(I)] was synthesized by a revised procedure and been characterized by ³¹P-{¹H} nuclear magnetic resonance and infrared spectrometry. Reversible interaction of the complex with CO₂ was demonstrated in the solution phase by both spectroscopic methods. Drop evaporation and spin and dip casting of solutions of the complex were employed to apply a solid film on the surfaces of bulk acoustic wave and flexural thin-rod acoustic wave devices for CO₂ recognition. The reversible gas-phase detection of CO₂ by both acoustic wave devices, deposited with the complex, has been confirmed.