Heterometallic ZnII–LnIII–ZnII Schiff Base Complexes with Linear or Bent Conformation—Synthesis, Crystal Structures, Luminescent and Magnetic Characterization

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-d...

Full description

Bibliographic Details
Main Authors: Barbara Miroslaw, Beata Cristóvão, Zbigniew Hnatejko
Format: Article
Language:English
Published: MDPI AG 2018-07-01
Series:Molecules
Subjects:
3d-4f complexes
luminescence
chiral coordination core
Schiff base polynuclear coordination compounds
linear conformation
Online Access:http://www.mdpi.com/1420-3049/23/7/1761
id doaj-4cd6257cfced475980a12c3acdc7ab4c
record_format Article
spelling doaj-4cd6257cfced475980a12c3acdc7ab4c2020-11-25T00:06:28ZengMDPI AGMolecules1420-30492018-07-01237176110.3390/molecules23071761molecules23071761Heterometallic ZnII–LnIII–ZnII Schiff Base Complexes with Linear or Bent Conformation—Synthesis, Crystal Structures, Luminescent and Magnetic CharacterizationBarbara Miroslaw0Beata Cristóvão1Zbigniew Hnatejko2Department of Crystallography, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, PolandDepartment of General and Coordination Chemistry, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, PolandDepartment of Rare Earths, Faculty of Chemistry, Adam Mickiewicz University, 61-614 Poznań, PolandA 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.http://www.mdpi.com/1420-3049/23/7/17613d-4f complexesluminescencechiral coordination coreSchiff base polynuclear coordination compoundslinear conformation
collection DOAJ
language English
format Article
sources DOAJ
author Barbara Miroslaw
Beata Cristóvão
Zbigniew Hnatejko
spellingShingle 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
Molecules
3d-4f complexes
luminescence
chiral coordination core
Schiff base polynuclear coordination compounds
linear conformation
author_facet Barbara Miroslaw
Beata Cristóvão
Zbigniew Hnatejko
author_sort Barbara Miroslaw
title Heterometallic ZnII–LnIII–ZnII Schiff Base Complexes with Linear or Bent Conformation—Synthesis, Crystal Structures, Luminescent and Magnetic Characterization
title_short Heterometallic ZnII–LnIII–ZnII Schiff Base Complexes with Linear or Bent Conformation—Synthesis, Crystal Structures, Luminescent and Magnetic Characterization
title_full Heterometallic ZnII–LnIII–ZnII Schiff Base Complexes with Linear or Bent Conformation—Synthesis, Crystal Structures, Luminescent and Magnetic Characterization
title_fullStr Heterometallic ZnII–LnIII–ZnII Schiff Base Complexes with Linear or Bent Conformation—Synthesis, Crystal Structures, Luminescent and Magnetic Characterization
title_full_unstemmed Heterometallic ZnII–LnIII–ZnII Schiff Base Complexes with Linear or Bent Conformation—Synthesis, Crystal Structures, Luminescent and Magnetic Characterization
title_sort heterometallic znii–lniii–znii schiff base complexes with linear or bent conformation—synthesis, crystal structures, luminescent and magnetic characterization
publisher MDPI AG
series Molecules
issn 1420-3049
publishDate 2018-07-01
description 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.
topic 3d-4f complexes
luminescence
chiral coordination core
Schiff base polynuclear coordination compounds
linear conformation
url http://www.mdpi.com/1420-3049/23/7/1761
work_keys_str_mv AT barbaramiroslaw heterometalliczniilniiizniischiffbasecomplexeswithlinearorbentconformationsynthesiscrystalstructuresluminescentandmagneticcharacterization
AT beatacristovao heterometalliczniilniiizniischiffbasecomplexeswithlinearorbentconformationsynthesiscrystalstructuresluminescentandmagneticcharacterization
AT zbigniewhnatejko heterometalliczniilniiizniischiffbasecomplexeswithlinearorbentconformationsynthesiscrystalstructuresluminescentandmagneticcharacterization
_version_ 1725421880284807168

Similar Items