Reactivity of bi- and monometallic trifluoroacetates towards amorphous SiO.

The reactivity of alkali-manganese(II) and alkali trifluoroacetates towards amorphous SiO (a-SiO) was studied in the solid-state. KMn(tfa), CsMn(tfa)(tfaH), KH(tfa), and CsH(tfa) (tfa = CFCOO) were thermally decomposed under vacuum in fused quartz tubes. Three new bimetallic fluorotrifluoroacetates of formulas KMn(tfa)F, CsMn(tfa)F, and KMn(tfa)F were discovered upon thermolysis at 175 °C.

Synthesis, Structure, and Luminescence of Mixed-Ligand Lanthanide Trifluoroacetates.

A series of new mixed-ligand lanthanide trifluoroacetates of formula Ln(4-cpno)(tfa)(HO)·HO (Ln = Sm, Eu, Gd, Tb, Dy; 4-cpno = 4-cyanopyridine -oxide; tfa = trifluoroacetate) is reported. Trifluoroacetates were synthesized as chemically pure polycrystalline solids and their crystal structures were probed using single-crystal and powder X-ray diffraction. Ln(4-cpno)(tfa)(HO)·HO solids make up an isostructural series in which LnO polyhedra are bridged by 4-cpno to form edge-sharing dimers.

Expanding the synthetic toolbox to access pristine and rare-earth-doped BaFBr nanocrystals.

A new synthetic route to access pristine and rare-earth-doped BaFBr nanocrystals is described. Central to this route is an organic-inorganic hybrid precursor of formula Ba(CFBrCOO)(HO) that serves as a dual-halogen source. Thermolysis of this precursor in a mixture of high-boiling point organic solvents yields spherical BaFBr nanocrystals (≈20 nm in diameter).

Bimetallic Trifluoroacetates as Precursors to Layered Perovskites AMnF (A = K, Rb, and Cs).

Four novel alkali-manganese(II) trifluoroacetates were synthesized, and their potential as self-fluorinating precursors to layered perovskites AMnF (A = K, Rb, and Cs) was demonstrated. NaMn(tfa), KMn(tfa), RbMn(tfa)·0.23HO, and CsMn(tfa)(tfaH) (tfa = CFCOO and tfaH = CFCOOH) were grown as single crystals, and their crystal structures solved using X-ray diffraction.

Microwave-assisted solid-state synthesis of NaRE(MO) phosphors (RE = La, Pr, Eu, Dy; M = Mo, W).

A synthetic method was developed to enable the microwave-assisted solid-state preparation of double molybdate and double tungstate scheelite-type phosphors of formula NaRE(MO4)2 (RE = La, Pr, Eu, Dy; M = Mo, W). Starting from subgram-scale stoichiometric mixtures of metal carbonates and oxides and with the aid of granular activated charcoal as a microwave susceptor, ternary (NaEu(MO4)2), quaternary (NaLa0.95Eu0.

Bimetallic Trifluoroacetates as Single-Source Precursors for Alkali-Manganese Fluoroperovskites.

Alkali-manganese(II) trifluoroacetates were synthesized, and their potential as single-source precursors for the solid-state and solution-phase synthesis of AMnF fluoroperovskites (A = Na, K, Rb, Cs) was demonstrated. Crystals of NaMn(tfa)(tfaH), KMn(tfa)(tfaH)·HO, RbMn(tfa)·HO, and CsMn(tfa) (tfa = trifluoroacetato) were grown via solvent evaporation and their crystal structures solved using single-crystal X-ray diffraction (XRD). Chemical purity was confirmed using thermal analyses (TGA/DTA) and Rietveld analysis of powder XRD patterns.