An overview of the chemistry of homo and heteropolynuclear platinum complexes containing bridging acetylide (μ-C≡CR) ligands

Formal Gold‐to‐Gold Transmetalation of an Alkynyl Group Mediated by Palladium: A Bisalkynyl Gold Complex as a Ligand to Palladium

“…In some cases these complexes result from the reaction of a gold alkynyl complex with a platinum precursor so Au to Pt alkynyl transmetalation precedes the formation of the complex. [24] Very few examples of [Au(C≡CR)2] -fragments acting as ligands have been reported.…”

Attachment of Luminescent Neutral “Pt(pq)(C≡CtBu)” Units to Di and Tri N-Donor Connecting Ligands: Solution Behavior and Photophysical Properties

“…As is shown in Figure 6A for the 4,4'-bpy system, the intensity of these high energy bands exceeds that of the starting material (Pt-1), as expected for the occurrence of overlapping pyridyl ligand-centered transitions in this region (see Table S2 for absorption of the free ligands). The moderately structured band at 355 nm (1)(2)(3)(4)(5) coincides with that observed in the starting material Pt-1, being attributed to 1 IL (pq) charge transfer.…”

“…However, due to the low lying nature of some of the * diimine ligands, contribution from platina-alkynyl to N-donor ligand charge transfer 1 [Pt(C≡C)*(N-donor)] could be also plausible. This contribution is apparent in the bpac system (5), which displays enhanced absorption in the low energy tail (line rose).…”

“…The three lower energy singlets (S1, S2 and S3) have similar energy values (435, 431 and 428 nm) and are mainly composed of excitations from HOMO−3 to HOMO→LUMO to LUMO+2. Therefore, the experimental band located in solution at 410 nm could be ascribed as an admixture of platinum-alkynyl-pq to pq charge transfer 1 [(M + L + L')LCT] with contribution to the central bpy…”

“…The interest of alkynyl platinum(II) complexes stems from their rich structural diversity [1][2][3][4], their interesting chemical reactivity [1] and more recently from their increasing potential in material science [5][6][7][8][9][10][11][12][13][14][15][16][17]. In this field, light-emitting complexes have attracted a great deal of attention owing to their use in optoelectronic devices, chemosensors, photovoltaic cells and photocatalysis.…”