An effective solvothermal procedure has been developed to synthesize the new three-dimensional metal-organic framework, [ZnF(AmTAZ)].solvents, using either 3-amino-1,2,4-triazole (AmTAZ) or 3-amino-1,2,4-triazole-5-carboxylic acid (AmTAZAc) and a choice of several Zn(II) salts as starting materials. The structure displays open-ended, hollow nanotubular channels that are formed by hexanuclear metallamacrocyclic Zn(6)F(6)(AmTAZ)(6) rings. framework integrity is maintained 350 degrees C, at...

Shrinkage factor: The ligand ppca (4-(pyridin-4-yl)pyridine-2-carboxylic acid) has enabled the synthesis of a new 3D framework material, [{[Co2(ppca)2(H2O)(V4O12)0.5]⋅3.62 H2O}n], which exhibits so-called “dynamic structural changes”. Temperature changes lead to reversible removal guest molecules and/or ligands (e.g. H2O) bound with concomitant structure change (see scheme).

Six new inorganic-organic salts, all containing iodobismuthate anions and d-metal coordination cations, were synthesized solvothermally from reactions of bismuth iodide, a transition metal (M) nitrate salt (M = Co, Fe or Zn), heterocyclic, chelating organic ligand: 1,10-phenanthroline (1,10-phen), 3,4,7,8-tetramethyl-1,10-phenanthroline (TMphen), 2,2':6',2''-terpyridine (tpy). All six compounds structurally analyzed by single crystal X-ray diffraction, including variable temperature...

To facilitate the potential application of TiO2 as an efficient photocatalyst, modulation its band gap and electrical structure is great significance. Herein, we report a very simple nitrogen (N)-doping method to obtain N-doped TiO2, which hybridized with graphene sheets at temperature low 180 °C using ammonia solution N source reaction medium. X-ray photoelectron spectroscopy analysis revealed that atomic level could reach 2.4 percent when time was 14 h. Photoluminescence (PL) emission...

Inorganic nanoscale X-ray contrast agents (XCAs) offer many potential advantages over currently used intravascular molecular agents, including longer circulation and retention times, lower administration volumes, greater for site directed imaging. Elemental bismuth nanoparticles (BiNPs) are particularly attractive candidate XCAs due to the low cost, high atomic number density of bismuth, likelihood that BiNPs will oxidatively decompose biocompatible bismuth(III) ions at controlled rates...

In order to improve specific capacitance and limit electrical resistance, high-quality exfoliated graphene decorated with transition metal (Fe, Mn, Co) oxide nanoparticles (NPs) has been successfully synthesized without the use of surfactantvia a simple, general, environmentally-friendly chemical process. The as-prepared graphene/Mn3O4 composite reach 239.6 F/g, when employed as anode material in neutral NaCl electrolyte solutions (cf. 98.2 F/g for pristine 141.4 pure Mn3O4 NPs), which...

The reactions of HgI2 with the semirigid ditopic ligand 1,3-bis(benzimidazol-1-ylmethyl)-2,4,6-trimethylbenzene (bbimms) afforded three new complexes, [Hg2(μ-I)2I2(bbimms)] (1), [Hg2I4(bbimms)2] (2), and catena-poly[HgI2(bbimms)] (3). all complexes have been structurally characterized by single-crystal X-ray diffraction. 1 is a triply bridged dinuclear complex comprised two Hg(II) ions, one bridging ligand, I- anions, terminal anions. 2 metallamacrocycle ligands, four while 3 helical chain...

Self-assembly of HgI2 with a semirigid ditopic 'Z' type ligand affords the zigzag chains that interweave into clothlike 2D network in 'two-over/two-under' (2O/2U) fashion.

Large, high quality single crystals of a new Zintl phase, EuIn2As2, have been synthesized from reactive indium flux. EuIn2As2 is isostructural to the recently reported phase EuIn2P2, and it only second member group compounds with formula AM2X2 (A = alkali, alkaline earth, or rare earth cation; M transition post-transition metal; X Group 14 15 element) that crystallizes in hexagonal space P63/mmc (a 4.2067(3) Å, c 17.889(2) Å Z 2). The structure type contains layers A2+ cations separated by...

Taking advantage of a pH-dependent solubility equilibrium, we have developed an aqueous synthesis chemically and colloidally stable bismuth(0) glyconanoparticles. The synthetic method results in potentially biocompatible elemental bismuth nanoparticles (BiNPs) involves the reduction bismuth(III) cations by sodium borohydride pH-controlled solution. Medical-grade dextran (75 000 MW) was found to protect nanocrystals from oxidation, addition promoting colloidal stability separation individual...

In this report, we describe the X-ray luminescent properties of two lanthanide-based nanoscale metal–frameworks (nMOFs) and their potential as novel platforms for optical molecular imaging techniques such excited radioluminescence (RL) imaging. Upon irradiation, nMOFs display sharp tunable emission peaks that span visible to near-infrared spectral region (∼400–700 nm) based on identity metal (Eu, Tb, or Eu/Tb). Surface modification with polyethylene glycol (PEG) resulted in nanoparticles...

Abstract Recent preclinical and clinical studies have highlighted the improved outcomes of combination radiotherapy immunotherapy. Concurrently, development high‐Z metallic nanoparticles as radiation dose enhancers has been explored to widen therapeutic window potentially enhance immune activation. In this study, folate‐modified hafnium‐based metal–organic frameworks (HfMOF‐PEG‐FA) are evaluated in with imiquimod, a TLR7 agonist, well‐defined interferon regulatory factor (IRF) stimulator for...

We have developed a versatile, one-step melt synthesis of water-soluble, highly emissive silicon nanoparticles using bifunctional, low-melting solids (such as glutaric acid) reaction media. Characterization through transmission electron microscopy, selected area diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy shows that the produces nanoscale Si cores surrounded by oxide shell. Analysis nanoparticle surface FT-IR, zeta potential, gel electrophoresis indicates...

Three new hybrid inorganic−organic salts containing novel mixed haloanions of bismuth were synthesized by the solvothermal reaction iodide with a haloacid, HX (X = Cl or Br), and alkylamine 4,4'-trimethylenedipiperidine (TMDP). All three compounds structurally characterized single-crystal X-ray diffraction. Reaction TMDP BiI3 HCl yielded two crystalline products: [H2TMDP]2[(Bi2I9)(BiCl2I2)] (1, major yield) [H2TMDP]2[Bi2Cl10-xIx] (2, x 3.83, minor yield). Compound 1 crystallizes in...

Na4Si4 and Na4Ge4 are ideal chemical precursors for inorganic clathrate structures, clusters, nanocrystals. The monoclinic Zintl phases, Na4Ge4, contain isolated homo-tetrahedranide [Si4]4− [Ge4]4− clusters surrounded by alkali metal cations. In this study, a simple scalable route has been applied to prepare phases of composition using the reaction between NaH Si or Ge at low temperature (420 °C 270 Na4Ge4). method was also K4Ge4, KH as raw materials, show versatility approach. influence...

Visibly emissive silicon nanoparticles (Si NPs) were obtained via annealing of (HSiO1.5)n polymer, followed by chemical etching. The hydride-terminated Si NPs (H-Si surface-functionalized thermal hydrosilylation with 1-decene and dispersed in straight chain alcohols varying carbon length (C1–C10). initial red photoluminescence (PL) (λmax,em ∼580 nm) observed from hexane dispersions the decane-terminated (dec-Si became weaker upon exposure to smaller than a minimum length, commensurate...

Four new, non-interpenetrated square-grid coordination polymers, namely [Mn(L)2(NO3)2]infinity (1), [[Cd(L)2(NO3)2].solvate]infinity (2), [Cd(L)2(NO3)2]infinity (3), and [[Zn(L)2](BF4)2.(C6H6)2.564.(DMF)1.576.(MeOH, H2O)3.454]infinity (4), were synthesized using the extremely long N,N'-type ligand: 2,5-bis(4'-(imidazol-1-yl)benzyl)-3,4-diaza-2,4-hexadiene (L). The reaction of Cd(NO3)2 with L leads to two novel structures sharing same framework composition, [Cd(L)2(NO3)2]infinity, which have...

Single crystals of EuGa2Pn2 (Pn = P, As) were grown from a molten Ga flux and characterized by single-crystal X-ray diffraction at 100(1) K. They are isostructural crystallize in new structure type (monoclinic, P2/m, 9.2822(9) Å, b 3.8967(4) c 12.0777(11) β 95.5220(10)°, R1 0.0148, wR2 0.0325 (EuGa2P2) 9.4953(7) 4.0294(3) 12.4237(9) 95.3040(10)°, 0.0155, 0.0315 (EuGa2As2)). The structures consist alternating layers two-dimensional Ga2Pn2 anions Eu cations. anion composed Ga2Pn6 staggered,...

High-density inorganic nanoparticles have shown promise in medical applications that utilize radiation including X-ray imaging and as dose enhancers for radiotherapy. We developed an aqueous synthetic method to produce small (~ 2 nm) iridium (IrNPs) by reduction of iridium(III) chloride using a borohydride reducing agent. Unlike other solution-based synthesis methods, uniform monodispersed IrNPs are produced without the use surfactants or solubilizing ligands. These highly crystalline...