Trivalent Tetrahedral Anion Template: A 26-Nucleus Silver Alkynyl Cluster Encapsulating Vanadate

Abstract

In order to study the charge effect on the formation of an anion-templated silver cluster, a trivalent tetrahedral anion was incorporated into the silver assembly. A 26-nuclear silver cluster was prepared, and its structure was confirmed by single-crystal X-ray diffraction. Also, the resulting structure was characterized by powder X-ray diffraction data. Its light absorption and photoluminescent properties were studied by solid-state UV diffuse-reflectance and fluorescence spectroscopy. Compared with the other reported silver clusters with tetrahedral anion templates, the more negative VO 4 3− anion led to the formation of a bigger silver cluster. Also, the supramolecular motif O−H(CH 3 OH)•••O(trifluoroacetate) was confirmed on the cluster surface for the first time.

Protection of Ag Clusters by Metal‐Oxo Modules

“…[24] Thus, mononuclear oxometallates generally exist as templates inside the core of resulting clusters and cannot provide effective protection for the periphery of the silver clusters. [4,[25][26][27][28] In 2019, Sun's group reported the first Ag cluster with mononuclear oxometallates CrO 4…”

Crystal structure of 4-dimethylamino-pyridin-1-ium uracil-1-acetate, C13H16N4O4

“…The nucleobases [10] have distinctly unique advantages to form cocrystals because they are outstanding H donors and acceptors. In order to combine some functional groups like nucleobases with coinage metal complexes [11][12][13][14], we reacted uracil-1-acetic acid with AgBF4 under the assistance of N,N-dimethylamino pyridine. The title salt compound (systematic name: 4-(dimethylamino)pyridin-1-ium 2-(2,4dioxo-3,4-dihydropyrimidin-1(2H)-yl)acetate) was obtained as an unexpected product.…”

T‐symmetric 40‐nucleus silver clusters assembled by hetero‐anions

“…The anion‐induced conversion of silver clusters leads to nuclearity build up, modifies the structural geometry, [ 2 ] and encloses the surficial coverage by the protection of ligands such as alkynyl, monothiolate, and dithiolate (diselenolate) ligands. [ 3–10 ] In general, the anion–template reaction can be approached by using various kinds of shape and valence charge of the anions, for example, spherical halide [ 2a,b,3 ] and chalcogenide, [ 4 ] triangular CO 3 2− and NO 3 − , [ 5 ] pyramidal XO 3 2− (X = S, Se, Te), [ 6 ] tetrahedral YO 4 2− (Y = S, Se, Cr, Mo), [ 7 ] trivalent VO 4 3− , [ 8 ] square C 4 O 4 2− , [ 9 ] and polyoxometalates (POMs). [ 10 ] Both size and number of the template have a significant effect on the increase of cluster nuclearity.…”