Cluster Linker Approach: Preparation of a Luminescent Porous Framework with NbO Topology by Linking Silver Ions with Gold(I) Clusters

Abstract

A cluster-based luminescent porous metal-organic framework has been constructed through a "cluster linker" approach. The luminescent gold(I) cluster, prefunctionalized with pyrazinyl groups, was used as a cluster linker, similar to an organic linker, to connect silver ions in order to form a 3D framework. 1D channels with 1.1 nm diameter were observed in the framework. The cluster with its intrinsic luminescence was incorporated into a porous framework to give a luminescent bifunctional NbO net. This MOF shows solvatochromic behavior, and the interactions between solvent molecules and silver ions inside the channels account for the changes in absorption and emission spectra.

The tetrahedral structure and luminescence properties of Bi-metallic Pt1Ag28(SR)18(PPh3)4 nanocluster

“…19–26 Among them, bi-metallic NCs may offer significantly enhanced properties compared to that of the single-component NCs due to the synergistic effects induced by the heteroatom(s). 20b,21b,22b,23,25a For example, drastically improved catalytic activity and enhanced luminescence (compared with the mono-metallic counterparts of NCs) have been achieved in M–Au (with a single dopant M = Pt or Pd) 27,28 and Au–Ag bi-metallic NCs (with Au dopants), 21b,22b respectively. These results demonstrate the great potential of alloy NCs in catalytic, optical and biological applications.…”

Solvent Dependent Excited State Behaviors of Luminescent Gold(I)–Silver(I) Cluster with Hypercoordinated Carbon

“…1−4 In particular, polynuclear Au(I) complexes have been widely investigated for their intense, long-lived emissions in the visible wavelength. 5−11 Au(I) has a closed-shell d 10 electronic distribution and tends to aggregate through aurophilic interactions; 12,13 thus, organic ligands are generally used to form Au(I) complexes. Unlike those monolayer protected Au clusters with core and motif structure, 14−16 these complexes have the same number of metal atoms as ligands (homoleptic), with no core gold atoms.…”

“…I is highly luminescent both in the solid state and in solution, which has been used to visualize the nucleolus of living cells 32 and to construct metal−organic frameworks (MOFs). 10 By using solvents with different polarity and hydrogen bonding ability (CH 2 Cl 2 , CH 3 CN, CH 3 OH), we are able to monitor the excited state dynamics and the electronic structure of I as a function of solvent properties. The steady state absorption spectra in the visible range are shifted by varying the solvent systems, while the emission wavelength remains unchanged.…”

Acid–Base‐Triggered Structural Transformation of a Polyoxometalate Core Inside a Dodecahedrane‐like Silver Thiolate Shell

“…A general and effective approach for the synthesis of organosilver(I) clusters [1][2][3][4][5] makes use of suitably selected template anions. [6,7] In particular,p olyoxometalates (POMs) [8][9][10] have been amply demonstrated as versatile templates in the assembly of high-nuclearity silver(I) ethynide and thiolate cluster systems that manifest intriguing structures with potential applications as luminescent, sensory,a nd catalytic materials.…”