A three-channel cross-reactive sensor array based on vapoluminescent platinum (II) double salt materials has been characterized. Two arrays were studied, one consisting of [Pt (CN- cyclododecyl) 4][Pt (CN) 4](1),[(phen) Pt (CN-cyclohexyl) 2][Pt (CN) 4](2), and [Pt (CN-n- tetradecyl) 4][Pt (CN) 4](3) materials, where phen= 1, 10-phenanthroline, and a second array that has compound 3 replaced by the mixed double salt material [(phen) Pt (CN- ...