Highly efficient electrocatalysts for hydrogen evolution reactions (HER) are crucial electrochemical water splitting, where high-cost and low-abundance Pt-based materials the benchmark catalysts HER. Herein, we report fabrication of MoP nanoparticles confined in P-doped porous carbon (MoP@PC) via a metal–organic framework-assisted route first time. Remarkably, due to synergistic effects nanocrystals, P dopant, carbon, resulting MoP@PC composite exhibits superior HER catalytic activity with...

The preparation of silicon nanotubes (SiNTs) using nanochannel Al2O3 as a template and chemical vapor deposition process is reported. outer diameters the SiNTs are around 60 nm with walls approximately 10 thick consisting crystalline amorphous silicon. A conceptual model presented (see Figure) to account for formation (right) opposed nanowires (left).

Through tuning the spacer length of flexible bis(triazole) ligands, three Keggin anion-based coordination polymers with different dimensionalities, [Cu4(H2O)4(bte)2(HPMoVI10MoV2O40)]·2H2O (1) (bte = 1,2-bis(1,2,4-triazol-1-yl)ethane), [Cu(btb)][Cu2(btb)2(PMo12O40)] (2) (btb 1,4-bis(1,2,4-triazol-1-y1)butane), and [Cu5(btx)4(PMoVI10MoV2O40)] (3) (btx 1,6-bis(1,2,4-triazol-1-y1)hexane), were synthesized structurally characterized. Compound 1 exhibits a ladder-like chain, in which...

Four inorganic-organic hybrid compounds, [Cu(I)(4)(bte)(4)(SiW(12)O(40))] (1), [Cu(II)(2)(bte)(4)(SiW(12)O(40))].4H(2)O (2) [bte = 1,2-bis(1,2,4-triazol-1-yl)ethane], [Cu(I)(4)(btb)(2)(SiW(12)O(40))].2H(2)O (3), and [Cu(II)(2)(btb)(4)(SiW(12)O(40))].2H(2)O (4) [btb 1,4-bis(1,2,4-triazol-1-yl)butane], were hydrothermally synthesized through use of the same Keggin polyoxometalate as template tuning molar ratio bis(triazole) ligand to Cu(II) ion. The has a crucial influence on structures this...

Four new hybrids based on the Wells-Dawson polyoxometalate [P2W18O62]6− (P2W18), {[Ag(bipy)]2[P2W18O62]}·2[H2bipy]·4H2O (1), {[Ag(bipy)]4[P2W18O62]}·2[Hbipy] (2), K[P2W18O62]·2.5[H2bipy]·2H2O (3), and [P2W18O62]2·[H2bipy]4·[Hbipy]4·3H2O (4), were hydrothermally synthesized structurally characterized by routine techniques single-crystal X-ray diffraction. Compounds 1 2 are isolated at lower pH values. represents a 3D (4,4)-net structure with NbO topology, in which P2W18 clusters modified four...

A new compound based on the Wells–Dawson polyoxometalate, Ag7(bbi)5(OH)(P2W18O62) (bbi = 1,1′-(1,4-butanediyl)bis(imidazole)) (1), has been hydrothermally synthesized and characterized by normal physical methods single-crystal X-ray diffraction. Compound 1 represents first interpenetrating framework POMs. The AgI···AgI interactions are crucial in formation of two individual motifs: motif, supported {Ag2}2+ dimers P2W18 polyanions form an infinite inorganic chain, then Ag+ monomers bbi...

In order to explore novel colorimetric biosensors with high sensibility and selectivity, two new Keggin polyoxometalates (POMs)-based Cu-trz (1,2,4-triazole) metal-organic frameworks (MOFs) suitable specific surface areas multiple active sites were favorably fabricated; then single-walled carbon nanotubes (SWNTs) merged POMOFs construct POMOF/SWNT nanocomposites. Herein, nanocomposites as peroxidase mimics explored for the first time, peroxidase-mimicking activity of prepared is heavily...

Three inorganic−organic hybrids based on polyoxometalate (POM), [Cu6(bbtz)6(HPM12O40)]·2H2O (M = Mo, 1; W, 2) and [Cu6(trz)2(bbtz)2(SiW12O40)] (3) (trz 1-H-1,2,4-triazole, bbtz 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene), were synthesized under hydrothermal conditions, structurally characterized. Through the use of flexible ligand bbtz, isostructural compounds 1 2 with interpenetrating structures obtained. In compound 1, ladder-like chains exist, in which PMo12 anions act as "middle rails"....

An unprecedented asymmetrically modified bivanadium-capped Keggin polyoxometalate (POM), {AsMo12O40(VO)[VO(H2O)]}·[Cu(4,4'-bipy)]5·H2O (1) (bipy = bipyridine), has been hydrothermally synthesized and structurally characterized by a routine technique. Single-crystal X-ray diffraction analysis reveals that compound 1 exhibits unique (3,4,6)-connected 3D framework with (62·81)2(83)2(64·82)2(61·814) topology, constructed from {AsMo12O40(VO)[VO(H2O)]}5- polyoxoanions six {Cu(bipy)}n coordination...

By introducing different long rigid ligands into polyoxometalate (POM) systems, four novel inorganic–organic hybrids containing multitrack Cu−N coordination polymeric chain-modified POMs, {[Cu(4,4′-bipy)]3[HGeMo12O40]}·0.5H2O (1), [Cu(4,4′-bipy)]{[Cu(4,4′-bipy)]2[W6O19]}·4H2O (2) (bipy = bipyridine), [Cu(bpe)]{[Cu(bpe)]2[GeMo12O40(VO)2]} (3) (bpe bis(4-pyridyl)ethylene), and [Cu2(phnz)3]2[SiW12O40] (4) (phnz phenazine), have been hydrothermally synthesized characterized by routine physical...

A series of remarkable crystalline compounds containing metallapillararene/metallacalixarene metal-organic frameworks (MOFs), [Ag5(pyttz)3·Cl·(H2O)][H3SiMo12O40]·3H2O (1), [Ag5(trz)6][H5SiMo12O40] (2), [Ag5(trz)6][H5GeMo12O40] (3), and [Ag5(trz)6][H4PW12O40] (4) (pyttz = 3-(pyrid-4-yl)-5-(1H-1,2,4-triazol-3-yl)-1,2,4-triazolyl, trz 1,2,4-triazole), have been obtained by using a simple one-step hydrothermal reaction silver nitrate, pyttz for 1 2–4, Keggin type polyoxometalates (POMs). Crystal...

Self-assembly of multiple components into well-defined and predictable structures remains one the foremost challenges in chemistry. Here, upon subtle ligand variation, we reported on assembly three new polyoxometalate-based organic–inorganic hybrid compounds with different helical channel, [Ag3(H2pyttz-I)2][PMo12O40] (1), [Ag6(H2pyttz-II)4][CoW12O40]·2H2O (2), [Ag7(Hpyttz-II)3(H2pyttz-II)][GeW12O40]·7H2O (3) (H2pyttz-I/II = 4-/3-pyrid-5-(1H-1,2,4-triazol-3-yl)-1,2,4-triazolyl, POM...

A coupled hybrid of molybdenum phosphide (MoP) and reduced graphene oxide has been prepared for the first time utilizing Mo-MOFs as precursors through a facile method. The nanocomposite exhibits superior electrocatalytic performance towards HER, is one best high-performance MoP-based electrocatalysts under acidic conditions reported so far.

Abstract Two novel complexes based on the Keggin POMs modified by Cu(4,4′‐bipy) moiety, {[Cu(4,4′‐bipy)] 3 [HSiMo 12 O 40 ]} · 1.5H 2 ( 1 ) and 4 [SiW 3H (bipy = bipyridine), have been hydrothermally synthesized characterized routine physical methods single‐crystal X‐ray diffraction. Complexes represent first examples of fully oxidized POM anions as pendant polydentate ligands covalently bonded to a multitrack Cu(bipy) polymer chain(s) through linearly arrayed d ··· c (O , terminal oxygen;...

By introducing different polyoxotungstates into the Ag–H2biim system, four new compounds with distinct architectures, Ag2(H2biim)4(W6O19)·2H2O (1), Ag6(H2biim)6(SiW12O40)(OH)2·2H2O (2), Ag6(H2biim)6(PW12O40)(OH)3·H2O (3) and Ag6(H2biim)6(P2W18O62)·12H2O (4) (H2biim = 2,2′-biimidazole), have been hydrothermally synthesized, characterized by routine physical methods single crystal X-ray diffraction. In compound 1, Lindqvist type polyoxotungstate {W6} combines chelate complex forming a discrete...

Two interesting hybrids based on polyoxometalates (POMs) and silver-tetrazolate subunits, H[Ag11(pytz)6(H2O)3(P2W18O62)]·H2O (1), H[Ag17(pytz)12(H2O)6(PMo12O40)2] (2) (pytz = 5-(2-pyridyl)tetrazolate), have been synthesized structurally characterized. X-ray diffraction analysis reveals that the periphery of Wells–Dawson POMs contains 16 Ag-pytz subunits in compound 1, which represents highest connection up to now. In crystal engineering point view, all Ag atoms, POMs, ligands, exhibit rich...

Two new polyoxometalate (POM)-based three-dimensional metal organic carbene frameworks, [Ag10(trz)4(H2O)2][HPW12O40] (POMs@MCNCs-1) and [Ag10(trz)4(H2O)6][H2SiW12O40] (POMs@MCNCs-2), were hydrothermally synthesized, in which Keggin-type polyoxoanions as templates induce the formation of two different kinds metal-carbene nanocages (MCNCs) for first time. Combination reversible multielectron redox behavior electron storage functions POMs with good electrical conductivity single-walled carbon...

A new fluconazole-functionalized polyoxometalate-based metal-organic framework (POMOF) [Ag3(FKZ)2(H2O)2][H3SiW12O40] (AgFKZSiW12) was successfully constructed, and its polypyrrole (PPy) coated composite AgFKZSiW12@PPy also obtained via a facile 'in situ' oxidation polymerization process. The peroxidase-like activity evaluation indicates that the maximized synergistic effect from integration of PPy, SiW12 clusters, HFKZ drug molecules, Ag ions deeply enhanced overall performance. More...

The first polyoxometalate (POM)-containing nanocage based metal-organic framework (Zn-POMCF) was synthesized by a surfactant-assisted method. In contrast to the Zn-based (Zn-MOF), cooperative assembly of POM and Zn/trz macrocycle gave rise high stability good electrochemical ability Zn-POMCF in lithium-ion batteries (LIBs).