Phosphorescent metallaknots of Au(I)-bis(acetylide) strands directed by Cu(I) π-coordination.

Knots containing metal atoms as part of their continuous strand backbone are termed as metallaknots. While several metallaknots have been synthesized through one-pot self-assembly, the designed synthesis of metallaknots by controlling the arrangement of entanglements and strands connectivity remains unexplored. Here, we report the synthesis of metallaknots composed with Au(I)-bis(acetylide) linkages and templated by Cu(I) ions.

Scissor-like AuCu Cluster with Phosphorescent Mechanochromism and Thermochromism.

Reaction of [Au(tht)](ClO) (tht = tetrahydrothiophene), [Cu(CHCN)](ClO), 3,6-di--butyl-1,8-diethynyl-9-carbazole (Hdecz), and bis(2-diphenylphosphinophenyl)ether (POP) in the presence of triethylamine (NEt) gave the cluster complex AuCu(decz)(POP) as yellow crystals. As revealed by X-ray crystallography, the AuCu cluster exhibits scissor-like structure sustained by two decz and two POP ligands and stabilized by Au-Cu and Au-Au interactions. The AuCu cluster shows bright yellow to orange photoluminescence upon irradiation at >300 nm, arising from [π (decz)→5d (Au)] LMCT (ligand-to-metal charge transfer) and [π→π* (decz)] IL (intraligand) triplet states as revealed by theoretical and computational studies.

Heteroctanuclear AuAg Cluster Complexes of 4,5-Diethynylacridin-9-One with Luminescent Mechanochromism.

Two heteroctanuclear AuAg cluster complexes of 4,5-diethynylacridin-9-one (HL) were prepared through the self-assembly reactions of [Au(tht)](CFSO), Ag(tht)(CFSO), HL and PPh or PPhPy (2-(diphenylphosphino)pyridine). The AuAg cluster consists of a [AuL] and four [Ag(PPh)] or [Ag(PPhPy)] units with AuL framework exhibiting a twisted paper clip structure. In CHCl solutions at ambient temperature, both compounds show ligand fluorescence at ca.

Elaborate Design of AgAu Cluster [2]Catenane Phosphors for High-Efficiency Light-Emitting Devices.

In this work, rational design of highly soluble and phosphorescent Ag-Au cluster complexes with exceptional [2]catenane structures is conducted using 1,8-diethynyl-9-carbazole (Hdecz) as a rigid U-shaped ligand with a distinguished hole-transport character. The self-assembly reaction of Hdecz, Au, and Ag generated phosphorescent AgAu cluster (Φ = 0.22 in CHCl) with Hdecz having a free ethynyl (-C≡CH) group.

Silver(i) nanoclusters of carbazole-1,8-bis(acetylide): from visible to near-infrared emission.

A feasible synthetic approach to achieve Ag8, Ag16 and Ag29 silver(i) nanoclusters is reported by the use of 1,8-diethynyl-9H-carbazole (H3decz) as a directing ligand. The silver(i) nanoclusters exhibit room-temperature photoluminescence in both solution and solid state. The emission band shows stepwise red-shifts from visible to near-infrared region with the increase of cluster nuclearity following 2 (Ag8, λem = 571 nm) → 3 (Ag16, λem = 651 nm) → 4 (Ag29, λem = 916 and 875sh nm) in fluid CH2Cl2.