Synthesis of plasmonic Fe/Al nanoparticles in ionic liquids.

Bottom-up and top-down approaches are described for the challenging synthesis of Fe/Al nanoparticles (NPs) in ionic liquids (ILs) under mild conditions. The crystalline phase and morphology of the metal nanoparticles synthesized in three different ionic liquids were identified by powder X-ray diffractometry (PXRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), selected-area electron diffraction (SAED) and fast Fourier transform (FFT) of high-resolution TEM images. Characterization was completed by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX) for the analysis of the element composition of the whole sample consisting of the NPs and the amorphous background.

Acetylenedicarboxylate and In Situ Generated Chlorofumarate-Based Hafnium(IV)-Metal-Organic Frameworks: Synthesis, Structure, and Sorption Properties.

New acetylenedicarboxylate (ADC) and chlorofumarate (Fum-Cl) based hafnium-metal-organic frameworks have been synthesized by alternatively reacting acetylenedicarboxylic acid in DMF or water with appropriate hafnium salt, in the presence of acetic acid modulator. The two materials of respective ideal formulas [HfO(OH)(ADC)] (Hf-HHU-1) and [HfO(OH)(Fum-Cl)] (Hf-HHU-2) have been structurally characterized by powder X-ray diffraction to be UiO-66 isostructural, consisting of octahedral [HfO(OH)] secondary building units each connected to other units by 12 ADC or Fum-Cl linkers into a microporous network with topology. This structure was confirmed by Rietveld refinement.

Aggregation control of Ru and Ir nanoparticles by tunable aryl alkyl imidazolium ionic liquids.

Metal-nanoparticles (M-NPs) were synthesized in a wet-chemical synthesis route in tunable aryl alkyl ionic liquids (TAAILs) based on the 1-aryl-3-alkyl-substituted imidazolium motif from Ru(CO) and Ir(CO) by microwave-heating induced thermal decomposition. The size and size dispersion of the NPs were determined by transmission electron microscopy (TEM) to an average diameter of 2.2(±0.

Synthesis of rare-earth metal and rare-earth metal-fluoride nanoparticles in ionic liquids and propylene carbonate.

Decomposition of rare-earth tris(,'-diisopropyl-2-methylamidinato)metal(III) complexes [RE{MeC(N(iPr))}] (RE(amd); RE = Pr(III), Gd(III), Er(III)) and tris(2,2,6,6-tetramethyl-3,5-heptanedionato)europium(III) (Eu(dpm)) induced by microwave heating in the ionic liquids (ILs) 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF]), 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIm][NTf]) and in propylene carbonate (PC) yield oxide-free rare-earth metal nanoparticles (RE-NPs) in [BMIm][NTf] and PC for RE = Pr, Gd and Er or rare-earth metal-fluoride nanoparticles (REF-NPs) in the fluoride-donating IL [BMIm][BF] for RE = Pr, Eu, Gd and Er. The crystalline phases and the absence of significant oxide impurities in RE-NPs and REF-NPs were verified by powder X-ray diffraction (PXRD), selected area electron diffraction (SAED) and high-resolution X-ray photoelectron spectroscopy (XPS). The size distributions of the nanoparticles were determined by transmission electron microscopy (TEM) and high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) to an average diameter of (11 ± 6) to (38 ± 17) nm for the REF-NPs from [BMIm][BF].

Realizing the Potential of Acetylenedicarboxylate by Functionalization to Halofumarate in Zr Metal-Organic Frameworks.

A strategy was developed to obtain from acetylenedicarboxylic acid either an acetylenedicarboxylate-based Zr metal-organic framework (MOF) with fcu topology or a halo-functionalized-MOF-801 through in situ ligand hydrohalogenation. The new materials feature exceptionally high hydrophilicity and CO /H adsorption energetics. The acetylenedicarboxylate linker and its functionalizable triple-bond discloses its potential in the engineering of microporous materials with targeted properties.