Metal-Organic Framework Supported Copper Photoredox Catalysts for Iminyl Radical-Mediated Reactions.

Visible-light copper photocatalysis has recently emerged as a viable technology for building sustainable synthetic processes. To broaden the applications of phosphine-ligated copper(I) complexes, we describe herein an effective metal-organic framework (MOF)-supported copper(I) photocatalyst for multiple iminyl radical-mediated reactions. Due to site isolation, the heterogenized copper photosensitizer has a significantly higher catalytic activity than its homogeneous counterpart.

Self-Assembly of Molecular Trefoil Knots Featuring Pentadecanuclear Homoleptic Au -, Au /Ag -, or Au /Cu -Alkynyl Coordination.

Metal-free and metal-containing molecular trefoil knots are fascinating ensembles that are usually covalently assembled, the latter requiring the rational design of di- or multidentate/multipodal ligands as connectors. In this work, we describe the self-assembly of pentadecanuclear Au trefoil knots [Au (C≡CR) ] from monoalkynes HC≡CR (R=9,9-X -fluorenyl with X=nBu, n-hexyl) and [Au (THT)Cl]. Hetero-bimetallic counterparts [Au M (C≡CR) ] (M=Cu/Ag) were self-assembled by reactions of [Au (C≡CR) ] with [Cu(MeCN) ] /AgNO and HC≡CR.

Photophysical and Electroluminescent Properties of PtAg Acetylide Complexes Supported with meso- and rac-Tetraphosphine.

1,2-Bis[[(diphenylphosphino)methyl](phenyl)phosphino]ethane (dpmppe) was prepared as a new tetraphosphine, and the corresponding rac and meso stereoisomers were successfully separated in view of their solubility difference in acetone. The substitution of PPh into Pt(PPh)(C≡CR) (R = aryl) with rac- or meso-dpmppe gives Pt(rac-dpmppe)(C≡CR) or Pt(meso-dpmppe)(C≡CR), respectively. Using Pt(rac-dpmppe)(C≡CR) or Pt(meso-dpmppe)(C≡CR) as a precursor, PtAg heterotrinuclear cluster complexes were synthesized and characterized by X-ray crystallography.