High-connected strategy of polyoxometalates towards model of core–shell nanostructure

Abstract

Cu-/Ag-modified polyoxometalates with 5/10/12 connections were obtained via a sulphur-assisted hydrothermal synthetic strategy.Core-shell nanostructures has been one of the hottest topics in current materials science and chemistry, not only because of their great potential applications in adsorption, separation, catalysis and photonics, but also due to their easy alteration of properties by changing the diameter, chemical composition, and crystallinity. 1-3 However, currently, there is still a lack of suitable practical models for understanding the essential properties and principles of core-shell nanostructures. As is known, in a single crystalline solid, nanosized clusters with various sizes, shapes, compositions, and structures can be regarded as ideal models for understanding the physical and chemical properties of nanoparticles and complex nanostructures. [4][5][6] In light of this point, the design and construction of nanosized clusters in crystals will provide an efficient and straightforward way to get a reasonable model for core-shell nanostructures.Polyoxometalates (POMs) have found widespread application, mainly in varied fields of analytical chemistry, catalysis, medicine and materials science. [7][8][9] They have a versatile nature, homogeneous size, controllable architecture, large negative charges, possess multiple coordination sites and the great assembly ability to construct novel

Copper(ii) tetrafluoroborate complexes with the N3,N4-bridging coordination of 1-(tert-butyl)-1H-tetrazole: synthesis, crystal structure and magnetic properties

“…Similar coordination appears in a polyoxometalate-based coordination polymer [Cu 3 (1-methyltetrazole) 4 ][PW 12 O 40 ], where Cu-N bond lengths are varied in the range 1.885-2.131 Å. 11 In complex Cu(1-[3′-(1,2,4-triazol-4-yl)propyl]tetrazole)(OH)BF 4 , a unique N 2 ,N 3 -coordination mode III of the tetrazole ring was observed. However, the Cu-N bond lengths of 2.580-2.645 Å indicate the semi-coordination character of binding.…”

“…All Cu-N 4 coordination bonds are typical, with bond lengths lying in the range of 1.9979(10)-2.0274(9) Å, and the Cu-O bond is also normal [2.2400(10) Å]. The Cu-N 3 bonds of 2.6998 (11) Å are considerably elongated and can be considered as semi-coordinated. In the binuclear cation, two copper ions are separated by 4.5382(3) Å.…”

New palladium (II) complexes with 1‐phenyl‐1H‐tetrazole‐5‐thiol and diphosphine Synthesis, characterization, biological, theoretical calculations and molecular docking studies

“…Thione compounds are adaptable ligands capable of bonding to transition metal chemistry and non‐transition metals, and the coordinate to transition metals in a wide range of oxidation state. [ 1–18 ] Thione ligands have the facility to stabilize both low and high oxidation state of metal ions, and this mostly due to the approval of thiol and thione tautmers (Chart 1). [ 1 ]…”

“…The thiol‐substituted heterocycle ligand, 1‐phenyl‐tetrazole‐5‐thiol (Hptt), having one soft donor sulfur and three hard donor nitrogen atoms, is a tetrazole‐based heterocyclic thioamide, providing more coordination sites for metal ions to form metal coordination complexes, most commonly, as monodentate ligands through the sulfur or nitrogen atom and can coordinated as bidentate chelating fashion through the sulfur and nitrogen atoms, or mode and bidentate bridging mode through the sulfur and nitrogen atoms, or through the sulfur atom only, as bridge between two metals atoms. Recently, many studies were published including complexes of tetrazole‐5‐thiol ligand with metal ions, [ 2–18 ] or with mixed ligand complexes of tetrazole‐5‐thiol with phosphine or amine as co‐ligands. [ 6–11,19–26 ] Transition metal complexes of tetrazole‐5‐thione present a wide range of applications in agriculture, medicine, industry, analytical and organic chemistry, as antibacterial, anti‐fungal, and anti‐inflammatory.…”

Optical properties, structural, and DFT studies of Pd(II) complexes with 1‐phenyl‐1H‐tetrazol‐5‐thiol, X‐ray crystal structure of [Pd(κ1‐S‐ptt)2(κ2‐dppe)] complex

“…[ 16,17 ] The (Hptt) can be binding to metal ions through its sulfur or nitrogen donor atoms as a monodentate ligand or bonded through its sulfur and nitrogen mode as bidentate (chelating or bridging) or through sulfur atom only as bridging bidentate fashion. [ 6,10,18,19 ] Recently, many studies were published, including mixed ligands complexes of metals ions with thione ligands and phosphines or amines as coligands. [ 5,8–15,20,21 ] Herein, we reported the synthesis, spectroscopic and theoretical studies, and antimicrobial activity of the Pd(II) complexes of 1‐phenyl‐1H‐tetrazole‐5‐thiol with phosphine {triphenyl phosphine (PPh 3 ), triphenyl phosphine sulfide (Ph 3 PS), triphenyl phosphine oxide (Ph 3 PO), 1,2‐bis (diphenyl phosphino) ethane (dppe), 1,2‐bis (diphenyl phosphino) ethane disulfide (dppeS 2 ), 1,2‐bis (diphenyl phosphino) ethane dioxide (dppeO 2 )}.…”