Interaction of {cyclobis[(cis-(dppp)Pt(4-ethynylpyridyl)(2))(cis-(L)M)]Ag-2}(+6)(-OSO2CF3)(6), where M = Pt(II) or Pd(II) and L = dppp or 2PEt(3), with pyridine, pyrazine, phenazine, or 4,4'-dipyridyl ketone results in coordination Lewis acid/base host-guest assemblies via the "pi-tweezer effect" and mono or bis neutral guest coordination. All host-guest complexes are air stable microcrystalline solids with decomposition points greater than 170 degrees C. The homometallic Pt(II) receptors are more stable than the heteroaromatic Pt(II)-Pd(II) receptors toward heteratom-containing aromatic guests. The X-ray crystal structure of the host-guest complex {cyclobis[(cis-(dppp)Pt(4-ethynylpyridyl)(2))(cis-(PEt3)(2)Pt)]Ag-2}(+6)(phenazine)(-OSO2CF3)(6) is reported. The crystals with the empirical formula C62H68AgF9N3O9P4Pt2S3 are triclinic P (1) over bar with a = 12.3919(8) Angstrom, b = 17.160(1) Angstrom, c = 18.932(1) Angstrom, alpha = 90.892(1)degrees, beta = 97.127(1)degrees, gamma = 89.969(1)degrees, and Z = 2.