Reaction of (tpyC6H4C≡CAu)n {tpyC6H4C≡CH = 4′‐(4‐ethynylphenyl)‐2,2′:6′,2″‐terpyridine} with diphosphane ligands Ph2P(CH2)xPPh2 (x = 2 dppe, 3 dppp, 4 dppb, 5 dpppen, 6 dpph) in CH2Cl2 afforded the corresponding dual luminescent binuclear gold(I) complexes [(tpyC6H4C≡CAu)2(μ‐dppe)] (1), [(tpyC6H4C≡CAu)2(μ‐dppp)] (2), [(tpyC6H4C≡CAu)2(μ‐dppb)] (3), [(tpyC6H4C≡CAu)2(μ‐dpppen)] (4), [(tpyC6H4C≡CAu)2(μ‐dpph)] (5). Crystal structural analysis of complexes 1·2CH2Cl2 and 2·2CH2Cl2 show that the terpyridine moieties are free of coordination in these gold(I)‐acetylide‐phosphane complexes. Spectrophotometric titration between complex 1 and [Eu(tta)3] (Htta = 2‐thenoyltrifluoroacetone) or [Yb(hfac)3(H2O)2] (Hhfac = hexafluoroacetylacetone) gave a 2:1 ratio between Ln(β‐diketonate)3 (Ln = Eu, Yb) units and the complex 1 moiety, indicating the formation of Au2Ln2 complexes. Both the luminescence titrations and the luminescence quantum yields of Au2Ln2 (Ln = Eu, Yb) solutions show that the energy transfer occurs efficiently from the binuclear gold(I) antennas 1–5 to EuIII and YbIII centers, and all complexes 1–5 are good energy donors for sensitization of visible and NIR luminescence of EuIII and YbIII ions.

Reaction of (AuC≡CbpyC≡CAu)(n) (HC≡CbpyC≡CH = 5,5'-diethynyl-2,2'-bipyridine) with diphosphine ligands Ph(2)P(CH(2))(n)PPh(2) (n = 1 dppm, 3 dppp, 5 dpppen, 6 dpph), 1,1'-bis(diphenylphosphino)ferrocene (dppf), and 1,2-bis(diphenylphosphino)benzene (bdpp) in CH(2)Cl(2) afforded the corresponding dual luminescent gold(I) complexes [(AuC≡CbpyC≡CAu)(2)(μ-dppm)(2)] (1), [(AuC≡CbpyC≡CAu)(2)(μ-dppp)(2)] (2), [(AuC≡CbpyC≡CAu)(2)(μ-dpppen)(2)] (3), [(AuC≡CbpyC≡CAu)(2)(μ-dpph)(2)] (4), [(AuC≡CbpyC≡CAu)(2)(μ-dppf)(2)] (5), and [(AuC≡CbpyC≡CAu)(2)(μ-bdpp)(2)] (6). The solid structures of complexes 1 and 2 are confirmed to be tetranuclear macrocyclic rings by single crystal structure analysis, and those of complexes 3-6 are proposed to be similar to those of complexes 1 and 2 in structure because their good solubility in CH(2)Cl(2), their HRMS results, and the P···P separations of 20.405-20.697 Å in the same linear rigid P-Au-C≡CbpyC≡C-Au-P unit are all favorable to form such 2:4:2 macrocycles. Each of the absorption spectral titrations between complexes 1-6 and Yb(hfac)(3)(H(2)O)(2) (Hhfac = hexafluoroacetylacetone) gives a 2:1 ratio between the Yb(hfac)(3) unit and the complex 1-6 moieties. The energy transfer occurs efficiently from the gold(I) alkynyl antennas 1-6 to Yb(III) centers with the donor ability in the order of 1 ~ 2 ~ 3 ~ 4 > 6 > 5.

In the title compound, [Cu(C3H10N2)2(C6H6NO3S)2]·2H2O, the CuII atom lies on an inversion center and is hexa­coordinated by four N atoms from two 1,3-diamino­propane ligands and two O atoms from two 4-amino­benzene­sulfonate ligands in a trans arrangement, displaying a distorted and axially elongated octa­hedral coordination geometry, with the O atoms at the axial positions. A three-dimensional network is formed in the crystal structure through O—H⋯O, N—H⋯O and N—H⋯N hydrogen bonds.