The formation of high-nuclear silver(I) clusters remains elusive and their potential applications are still underdeveloped. Herein, we report a unprecedented gigantic Ag148 ([Ag148S26Cl30(C≡CBut)60](SbF6)6) cluster co-templated by Cl- and S2-, which...
Herein, the growth of magic-size silver(i) chalcogenide clusters from Ag32S3 to Ag45S6 is described, providing a ligand-exchange approach to access the size and luminescence of semiconductor silver(i) clusters.
In this paper, three Compounds have been synthesized via conventional solution method. Compound 1 is a pure 2D (two dimensional) inorganic {CoO 6 Mo 8 O 28 } n framework. In the structure, the rare {γ-Mo 8 O 28 } units connect into 1D chains via vertex-sharing mode, and further assemble into 2D frameworks by {CoO 6 } octahedral linkers. This Compound was proved to be a costeffective pre-catalyst with excellent catalytic performances due to presence of cobalt for water oxidation with low overpotential of 293 mV at 10.0 mA cm À 2 and small Tafel slope of 53 mV dec À 1 . Furthermore, the electrocatalytic activity can be maintained for a quite long time with the retention rate of 94 % within 24 hours. Compared with 1D {γ-Mo 8 O 26 } n (Compound 2) and 0D {α-Mo 8 O 26 } (Compound 3), the CoÀ Mo complex catalyst based on compound 1, featured with Co-doped 2D {Mo 8 O 28 } n porous framework and CoÀ Mo synergistic effect, which is supported by the high resolution XPS of Co 2p and Mo 3d, exhibits an extraordinary electrocatalytic reaction for water oxidation. The work shown here enriches inorganic polyoxometalate (POM) -based functional material applied to relief energy crisis.
This work reports that two new assemblies based on POM and AIE-quenched R6G display tuneable fluorescence intensity; furthermore two hybrids can be controllably synthesized and reversible transformation can also be achieved.
The
controllable construction of pure inorganic polyoxometalate
(POM)zite materials with well-defined secondary building units (SBUs)
is of great challenge. In this work, three distinct POM porous framework
compounds 1–3 based on [MoVI
36O112(H2O)16]8–({Mo36}) SBUs with various active growth points and transition-metal
Ag linkers, both as countercations and structure directors, were self-assembled
from simple salts to ordered porous frameworks (compound 1 is a 3D framework with channels of 20.1 Å in diameter, while
compound 2 and compound 3 are 2D frameworks
with channels of 29.1 and 26.8 Å in diameter, respectively, and
the channels of compound 3 are formed by the fourfold
spiral winding of {Mo36} SBUs) by controlling the reaction
conditions, providing valuable experience for synthetic chemists to
obtain more interesting and functional materials. The {Mo36}-based POM porous framework compounds 1–3 exhibit
cell type-specific, dose-dependent, and pH-sensitive anticancer behavior,
with the lowest IC50 in A549 lung cancer cells. Further,
the monomer precursors AgNO3 and Mo36 SBU, however,
are less cytotoxic to A549 cells than compound Ag–{Mo36}, suggesting a synergistic action of hybrid materials. Mechanistic
insights into the anticancer activity of compounds 1–3 show that they induce mitochondria-mediated apoptosis and necrosis
in A549 cells. Thus, {Mo36}-based POM porous framework
materials with silver ions could serve as promising anticancer agents
for lung cancer therapy.
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