Synthesis of palladium tellurolate complexes derived from hemi-labile tellurolate liagnds and studies their reactivity as gas sensing materials

Abstract The reaction of [PdCl 2 (dppf)] with the sodium salt of pyridyl/pyrimidyl tellurolate resulted a mononuclear cis configured complex [Pd(TeAr) 2 (dppf)] (Ar = C 5 H 4 N, C 4 H 3 N 2 ). These complexes were characterized by NMR ( 1 H, 31 P) spectroscopy and elemental analysis. In addition, the thin film of this complex was fabricated on the glass using solution process and it was found to be sensitive towards detection of H 2 S gas. The chemi-resistive response of the film was ascribed to the fact that an auxiliary tellurolate ligand attached to palladium metal centre substituted reversibly by thiolate (HS - ) species of hydrogen sulphide gas.