Structural conversion of three copper(<scp>ii</scp>) complexes with snapshot observations based on the different crystal colours and morphology

Su, Hao; Li, Zhongkui; Tan, Junrui; Ma, Hongwei; Li, Yan; Li, Hui

doi:10.1039/d0ra07231a

Cited by 3 publications

(4 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When compared with related copper(II) complexes reported in the literature, similar Cu−O and Cu−N bond distances around the copper(II) are observed [64,65] . Nevertheless, the axial bond distance [2.301(7) Å] which is considerably larger, is typical for Cu−O complexes with water molecules and comparable to the distances found for analogous copper( II ) complexes [66,67] . Two chelate rings, one five‐membered and another six‐membered, detected in 1 are substantially non‐planar.…”

Section: Resultssupporting

confidence: 70%

“…[64,65] Nevertheless, the axial bond distance [2.301( 7) Å] which is considerably larger, is typical for CuÀ O complexes with water molecules and comparable to the distances found for analogous copper(II) complexes. [66,67] Two chelate rings, one five-membered and another six-membered, detected in interaction. [68] As displayed in Figure 2, the packing diagram of ChemistrySelect 1 exhibits strong hydrogen bonding interactions involving the carboxylate and coordinated/uncoordinated water molecules.…”

Section: X-ray Crystal Structure Of Complexmentioning

confidence: 99%

See 1 more Smart Citation

Cu(II), Mn(II) and Zn(II) Complexes of Anthracene‐Affixed Carboxylate‐Rich Tridentate Ligand: Synthesis, Structure, Spectroscopic Investigation and Their DNA Binding Profile

et al. 2022

View full text Add to dashboard Cite

Anthracene-affixed carboxylate-rich tridentate ligand containing three new mononuclear complexes, [Cu(acpa)(H 2 O) 2 ]⋅H 2 O (1), [Mn(acpa)(H 2 O) 2 ] (2) and [Zn(acpa)(H 2 O) 2 ] (3) (H 2 acpa = 3-(anthracene-9-ylmethyl-carboxymethyl-amino)-propionic acid), have been synthesized and characterized by various analytical and spectral methods. In methanol, complexes 1-3 have been prepared by carrying out reaction of the ligand H 2 acpa with stoichiometric amounts of CuSO 4 ⋅ 5H 2 O, MnSO 4 ⋅H 2 O and ZnSO 4 ⋅ 7H 2 O respectively, in the presence of NaOH at ambient temperature. The X-ray crystal structure analysis reveals that complex 1 consists of a distorted square pyramidal copper center, coordinated to one acpa 2À ligand in a tridentate manner (N,O,O) and two exogenous water molecules. On the other hand, the molecular structures of complexes 2 and 3, optimized by DFT method indicate that their core arrangements around the metal centers are similar to that of 1. In solution, the coordination phenomena of Cu((II), Mn(II) and Zn(II) ions with the ligand H 2 acpa and the structural features of the complexes have been authenticated by UV-Vis and fluorescence titration experiments. The composition of the M II /acpa 2À complexes (M = Cu, Mn, Zn) in 1-3 has been observed to be 1 : 1, based on the UV-Vis/fluorescence titration results which are further supported by X-ray crystallography and DFT calculation. Complexes 1-3 are investigated for their binding affinity towards Calf Thymus (CT) DNA in solution at pH ∼ 7.5 by UV-Vis and fluorescence spectroscopic methods. From the electronic absorption spectral studies, it has been found that the DNA binding constants of 1-3 are (5.67 � 0.32) × 10 4 M À 1 , (2.35 � 0.26) × 10 4 M À 1 and (2.49 � 0.33) × 10 4 M À 1 , respectively, following the order 1 > 3 > 2. Measurements of viscosity of DNA in the absence and presence of the metal complexes suggest that all three complexes interact with DNA through partial intercalative mode.

show abstract

Section: Resultssupporting

confidence: 70%

Section: X-ray Crystal Structure Of Complexmentioning

confidence: 99%

Cu(II), Mn(II) and Zn(II) Complexes of Anthracene‐Affixed Carboxylate‐Rich Tridentate Ligand: Synthesis, Structure, Spectroscopic Investigation and Their DNA Binding Profile

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Solvents used in the processes of crystallization lead to the formation of different crystal structures and compositions, and thus affect their properties. Observed structural changes are characterized by a slight modification of the number of non-coordinated solvent molecules [ 42 , 43 , 44 ]. For the luminescence and UV-Vis studies, single crystals of the product were used [ 41 ].…”

Section: Methodsmentioning

confidence: 99%

Synthesis and Characterization of Lanthanide Metal Ion Complexes of New Polydentate Hydrazone Schiff Base Ligand

Pospieszna-Markiewicz

Fik-Jaskółka

Hnatejko

et al. 2022

Molecules

View full text Add to dashboard Cite

The new homodinuclear complexes of the general formula [Ln2L3(NO3)3] (where HL is newly synthesized 2-((2-(benzoxazol-2-yl)-2-methylhydrazono)methyl)phenol and Ln = Sm3+ (1), Eu3+ (2), Tb3+ (3a, 3b), Dy3+ (4), Ho3+ (5), Er3+ (6), Tm3+ (7), Yb3+ (8)), have been synthesized from the lanthanide(III) nitrates with the polydentate hydrazone Schiff base ligand. The flexibility of this unsymmetrical Schiff base ligand containing N2O binding moiety, attractive for lanthanide metal ions, allowed for a self-assembly of these complexes. The compounds were characterized by spectroscopic data (ESI-MS, IR, UV/Vis, luminescence) and by the X-ray structure determination of the single crystals, all of which appeared to be different solvents. The analytical data suggested 2:3 metal:ligand stoichiometry in these complexes, and this was further confirmed by the structural results. The metal cations are nine-coordinated, by nitrogen and oxygen donor atoms. The complexes are two-centered, with three oxygen atoms in bridging positions. There are two types of structures, differing by the sources of terminal (non-bridging) coordination centers (group A: two ligands, one nitro anion/one ligand, two nitro anions, group B: three ligands, three anions).

show abstract

“…And these analogues exhibited excellent catalysis and luminescent sensing properties. 32 In our earlier work, we devised a unique method for synthesizing tridentate ligands, which are 5-substituted compounds of salicylaldehyde-modified glycine. One of the advantages of these ligands is that their metal coordination complexes include open coordination sites, which create a platform to achieve dynamical control over the compositions and structures of coordination complexes.…”

Section: Introductionmentioning

confidence: 99%

Construction of MOF-74 analogues through pre-installation of functional ligands: efficient directional functionalization and properties

Manurkar,

Su,

Arshad

et al. 2024

CrystEngComm

Self Cite

View full text Add to dashboard Cite

show abstract

Structural conversion of three copper(ii) complexes with snapshot observations based on the different crystal colours and morphology

Abstract: Structural conversion of three novel Cu(ii) complexes [Cu2(L)2(MeOH)2] (1), [Cu2(L)2(H2O)2] (2) and [CuL(H2O)] (3) (L = (E)-2-((2-hydroxy-4-methoxybenzylidene)amino)acetic acid) in different time scales of reaction processing.

Cited by 3 publications

References 34 publications

Cu(II), Mn(II) and Zn(II) Complexes of Anthracene‐Affixed Carboxylate‐Rich Tridentate Ligand: Synthesis, Structure, Spectroscopic Investigation and Their DNA Binding Profile

Cu(II), Mn(II) and Zn(II) Complexes of Anthracene‐Affixed Carboxylate‐Rich Tridentate Ligand: Synthesis, Structure, Spectroscopic Investigation and Their DNA Binding Profile

Synthesis and Characterization of Lanthanide Metal Ion Complexes of New Polydentate Hydrazone Schiff Base Ligand

Construction of MOF-74 analogues through pre-installation of functional ligands: efficient directional functionalization and properties

Contact Info

Product

Resources

About