1. Grant MINIATURA 1 finansed by National Science Centre (2017-2018)
Grant MINIATURA 1 – supervisor Grant ID: 2017/01/X/ST5/00200 Time limits: 16.09.2017-15.09.2018 Titke: Study of the effect of structure on the luminescence properties of 3d and 4f coordination compounds of chelating Schiff's base ligands
Related publications:
Barbara Miroslaw, Beata Cristóvão, Zbigniew Hnatejko Halogen bonded lamellar motifs in crystals of Schiff base ZnII–LnIII–ZnII coordination compounds – synthesis, structure, Hirshfeld surface analysis and physicochemical properties Polyhedron 166 (2019) 83-90. https://doi.org/10.1016/j.poly.2019.03.047
Halogen bonded lamellar supramolecular motifs have been found in the series of trinuclear crystals of ZnII–LnIII–ZnII complexes with N,N′-bis(5-bromo-3-methoxysalicylidene)-1,3-diamino-2-propanol, with formulae [{Zn(HL)}2(μ-OAc)2Ln]NO3·2CH3OH·2H2O (1,2) and [{Zn(HL)}2(μ-OAc)2Ln]NO3·5.33H2O (3,4), where Ln = La (1), Ce (2), Er (3) and Yb (4). The isoskeletal crystals form monoclinic (1,2) or trigonal (3,4) layers built of halogen bonded dimers or trimers. The role of halogen bonding as a stabilizing force in building of long-range synthon aufbau modules (LSAM) is discussed. The heterotrinuclear coordination compounds were characterized by elemental analysis, FTIR and UV–Vis spectroscopy, thermal analysis, photoluminescence measurements, X-ray crystallography and Hirshfeld surface analyses.
Barbara Miroslaw, Beata Cristóvão, Zbigniew Hnatejko
Structural, Luminescent and Thermal Properties of Heteronuclear PdII–LnIII–PdII Complexes of Hexadentate N2O4 Schiff Base Ligand
New PdII–LnIII–PdII complexes of hexadentate N2O4 Schiff base ligand (H4L: N,N′-bis(2,3-dihydroxybenzylidene)-1,3-diamino-2,2-dimethylpropane) with Eu (1), Tb (2), Er (3) and Yb (4) ([Pd2Eu(H2L)2NO3](NO3)2∙2H2O∙2CH3OH 1, [Pd2Ln(H2L)2H2O](NO3)3∙3H2O, where Ln = Tb 2, Er 3, [Pd2Yb(H2L)2H2O](NO3)3∙5.5H2O 4) were synthesized and characterized structurally and physicochemically by thermogravimetry (TG), differential thermogravimetry (DTG), differential scanning calorimetry (DSC) and luminescence measurements. The compounds 1–4 are built of cationic heterometallic PdII–LnIII–PdII trinuclear units. The palladium(II) centers adopt a planar square geometry occupying the smaller N2O2 cavity of the Schiff base ligand. The lanthanide(III) is surrounded by two Schiff base ligands (eight oxygen atoms) and its coordination sphere is supplemented by a chelating bidentate nitrate ion in 1 or by a water molecule in 2–4. The complexes have a bent conformation along the PdII–LnIII–PdII line with valence angles in the ranges of 162–171°. The decomposition process of the complexes results in mixtures of: PdO, Pd and respective lanthanide oxides Eu2O3, Tb2O3, Tb4O7, Er2O3, Yb2O3. The luminescent measurements show low efficiency intramolecular energy transfer only in the complex of terbium(III) (2).
Barbara Miroslaw, Beata Cristóvão, Zbigniew Hnatejko
Heterometallic ZnII–LnIII–ZnII Schiff Base Complexes with Linear or Bent Conformation—Synthesis, Crystal Structures, Luminescent and Magnetic Characterization.
A series of racemic, heteronuclear complexes [Zn2Nd(ac)2(HL)2]NO3·3H2O (1), [Zn2Sm(ac)2(HL)2]NO3·3CH3OH·0.3H2O (2), [Zn2Ln(ac)2(HL)2]NO3·5.33H2O (3–5) (where HL is the dideprotonated form of N,N′-bis(5-bromo-3-methoxysalicylidene)-1,3-diamino-2-propanol, ac = acetate ion, and Ln = Eu (3), Tb (4), Dy (5), respectively) with an achiral multisite coordination Schiff base ligand (H3L) were synthesized and characterized. The X-ray crystallography revealed that the chirality in complexes is centered at lanthanide(III) ions due to two vicinally located μ-acetato-bridging ligands. The presented crystals have isoskeletal coordination units but they crystallize in monoclinic (1, 2) or trigonal crystal systems (3–5) with slightly different conformation. In 1 and 2 the ZnII–LnIII–ZnII coordination core is linear, whereas in isostructural crystals 3–5 the chiral coordination cores are bent and lie on a two-fold axis. The complexes 1, 3–5 show a blue emission attributed to the emission of the ligand. For ZnII2SmIII complex (2) the characteristic emission bands of f-f* transitions were observed. The magnetic properties for compounds 1, 4 and 5 are characteristic for the paramagnetism of the corresponding lanthanide(III) ions.
2. Grant finansed by European Fund (2011)
Travel grant for XAS synchrotron measurements in the HASYLAB DESY laboratory in Germany - contractor
Project no I-20110121 EC Time limits: 12.2011 Title: XAS study of Cu complexes with novel 1,2,4-triazole-3-thione and 3-thiourea ligands – potent inhibitors of metal enzymes and RNA-dependent DNA polymerase
3. Grant finansed by National Centre for Nuclear Research (2015)
Refund of travel expenses for the European XFEL Users' Meeting 2015 in the laboratory at the HASYLAB DESY synchrotron in Hamburg, Germany – participant Time limits: 28-30.01-2015
4. Grant finansed by Ministry of Science and Higher Education (2012)
Computational grant implemented on computers in the Academic Computer Center CYFRONET AGH – manager Grant no.: MNiSW/SGI3700/UMCSLublin/071/2012 Title: Structural studies of biologically active heterocyclic compounds based on X-ray diffraction data
5. Grant finansed by Ministry of Science and Higher Education (2013)
Computational grant implemented on computers in the Academic Computer Center CYFRONET AGH – manager Grant no.: MNiSW/Zeus_lokalnie/UMCSLublin/015/2013 Title: Research on the properties of biologically active compounds using quantum chemical calculations
6. Grant OPUS 3 finansed by przez National Science Centre (2012)
Grant OPUS 3 – contractor Grant no.: 2012/05/B/ST5/00362 manager dr Oleh M. Demchuk
Title: Design and synthesis of catalysts with special properties, including chiral, soluble in water and immobilized in / on perfluorinated and solid supports.Application in syntheses carried out in environmentally friendly conditions.
