Solvent-driven self-assembly of two novel di- and tetra-nuclear Cu(II) bis(salamo)-based complexes

Zhang, Jian; Wei, Yu-Xin; Niu, Hao-Ying; Dong, Wen‐Kui

doi:10.1016/j.molstruc.2022.134554

Cited by 49 publications

(8 citation statements)

References 64 publications

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“…Compared to that of the ligand H 4 L, the absorption peaks of the complexes have slight blueshifts. For complex 1 , the absorption peaks at 300 and 313 nm have slight blueshifts to approximately 298 and 312 nm, the absorption peaks at 343 and 357 nm were also slightly blueshifted to around 342 and 355 nm, and the same phenomenon was found for the other complexes, which suggested that coordination occurred between the ligand and corresponding metal(II) ions. − The experimental obtained absorption spectra along with the theoretically data are displayed in Table , which include the most important excited state and their dominant orbital excitations, oscillator strengths, and assignments. , …”

Section: Resultsmentioning

confidence: 99%

“…56−58 The experimental obtained absorption spectra along with the theoretically data are displayed in Table 2, which include the most important excited state and their dominant orbital excitations, oscillator strengths, and assignments. 59,60 In addition, to examine complexes 1−4 formation reaction and binding ratio, spectrophotometric titration experiments were executed by the incremental addition of M 2+ ions (1 × 10 −3 M) to 2 mL of EtOH solution of the free ligand (1 × 10 −2 M) (Figure 16). 61 During the gradual addition of M 2+ ions (0−4.0 eq.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Coordination-Driven Salamo-Salen-Salamo-Type Multinuclear Transition Metal(II) Complexes: Synthesis, Structure, Luminescence, Transformation of Configuration, and Nuclearity Induced by the Acetylacetone Anion

Yan

et al. 2023

Inorg. Chem.

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A flexible polydentate Salamo-Salen-Salamo hybrid ligand H 4 L was designed and synthesized, which has rich pockets (salamo and salen pockets) so that it may have fascinating coordination patterns with transition metal(II) ions. Four multinuclear transition metal(II) complexes, novel butterflyshaped homotetranuclear 4), have been synthesized and characterized by single-crystal X-ray diffraction. The effects of different anions [OAc − and (O 2 C 5 H 7 ) 2− ] on the complexation behavior of H 4 L with transition metal(II) ions were studied by UV−vis spectrophotometry. The fluorescent properties of the four complexes were studied with zebrafish, which are expected to be a potential light-emitting material. Ultimately, interaction region indicator (IRI) valuations, Hirshfeld surface analyses, density functional theory (DFT & TD-DFT), electrostatic potential analyses (ESP), and simulations were carried out to further demonstrate the weak interactions and electronic properties of the free ligand and its four complexes.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Coordination-Driven Salamo-Salen-Salamo-Type Multinuclear Transition Metal(II) Complexes: Synthesis, Structure, Luminescence, Transformation of Configuration, and Nuclearity Induced by the Acetylacetone Anion

Yan

et al. 2023

Inorg. Chem.

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“…The binary symmetric wings exposed in the 2D fingerprint plots signify the exchange C…H/H…C (3), that sources the C-H…π exchange. [68][69][70][71] Wing pairs form interactions with values of 13.3% with d i + d e = 3.0 Å of the Hirshfeld surface. In addition, the FPs show that they are symmetrical for the diameter of the plots, which is a relatively isotropic environment of molecules observed in solid-state crystallographic structures.…”

Section: Electrochemistrymentioning

confidence: 99%

“…For the values of E less than 1 (E < 1), the contact is considered undesirable, which means the two contacts are evading each other. The enrichment ratio for Ni (II) complex has been shown in Table 5, 48,70 where H…C/C…H and H…O/O…H contacts with higher values of E are considered desirable, whereas H…H contact is undesirable in terms of E ratios.…”

Section: Electrochemistrymentioning

confidence: 99%

“…The C…H/H…C exchanges (3) composing the C-H…π exchanges signify the share of 20.2% with the values of d i + d e > 2.5 Å. [68][69][70][71] According to the enrichment ratio information in Table 4, for this complex, the preferred contacts with the value of E > 1 are H…N/N…H, H…O/O…H, and H…C/C…H are type, where a higher value of 1 is found for these interactions. This result confirms that such interactions play an important role in the integrity of the crystal system.…”

Section: Hirshfeld Surfaces Analysis Fps and E Of Ni (Ii) Complex (1b-1)mentioning

confidence: 99%

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Novel dinuclear Ni (II) Schiff base complexes induced noncovalent exchanges: Crystal structure investigation, electrochemical assessment, Hirshfeld surface analysis and SARS‐CoV‐2 docking study

Roozbahani,

Malekshah,

Salehi

et al. 2023

Applied Organom Chemis

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In this work, novel Ni (II) complexes, namely, [Ni2(L)2(OAc)2(EtOH)2] (1a), [Ni2(L)2(OAc)2(H2O)2] (1b‐1) and [Ni2(L)2(OAc)2(EtOH)2] (1b‐2) as co‐crystal were synthesized by the 1:1 condensation (https://www.sciencedirect.com/topics/chemistry/condensation) of Ni (CH3COO)2·4H2O and Schiff base ligand (H2L) (2‐hydroxy‐4‐methoxybenzaldehyde and 2‐amino‐2‐methylpropanol). The ligand based on Schiff base and fabricated complexes (1a) and (1b‐1 and 1b‐2) were successfully identified by CHN assessment, FT‐IR, UV–Vis spectra, melting point and CV voltammogram. The electrochemical behavior investigation shows that the nickel complexes exhibited irreversible oxidation processes in methanol solution. Additionally, the crystal structures of complexes (1a) and (1b) have been recognized by single‐crystal X‐ray diffraction investigation. It turned out that the complexes (1b‐1) and (1b‐2) crystallize together, making a co‐crystal 1b with an additional EtOH solvent molecule in the crystal structure. A detailed study of intermolecular exchanges was performed using attractive graphical analysis tools such as three‐dimensional Hirshfeld surfaces analysis, two‐dimensional fingerprint plots (FPs), and enrichment ratios (E), which make C‐H … C, C‐H … O hydrogen bond, C … O, H … H, and O … O short contacts on Hirshfeld surfaces with color code are observed. Moreover, an appraisement of the inhibitory trace against coronavirus (main protease SARS‐CoV‐2, PDB ID: 6Y2F) and molecular targets of human angiotensin‐converting enzyme‐2 (ACE‐2) was performed by a molecular docking study in which two nickel complexes performed best for PDB protein ID: 6M0J and all three complexes for PDB protein ID: 6Y2F.

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Anion‐Modulated Construction of Two Novel Tetra‐ and Hepta‐Nuclear Ni(II) Salamo‐Type Clusters: Comparison of the DFT Calculations and Weak Interaction Analyses

Zhang,

Zheng

et al. 2024

Applied Organom Chemis

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Two novel tetra‐ and hepta‐nuclear Ni(II) salamo‐type clusters, [Ni4(L)2(μ2‐Cl)2(μ3‐OH)2(EtOH)2]⋅4CH2Cl2 (1) and [Ni7(L)3(μ3‐OEt)2(μ3‐OH)6(EtOH)2] (2), were constructed by modulating different anions (Cl− and NO3−). X‐ray crystallographic researches revealed that cluster 1 is a tetranuclear cluster consisting of a symmetric binuclear structure in which chloride ions are involved in coordination. Although cluster 2 consists of seven Ni(II) ions, three deprotonated (L)2− parts, two μ3‐ethoxy groups, six μ3‐OH− anions, and two coordinated ethanol molecules, in which it is quite rare for a large number of water molecules to be deprotonated to participate in the bridging of the cluster due to the alkaline environment. TEM electron scanning displayed the distinct shapes. Comparison of DFT calculations revealed that cluster 2 is less chemically reactive and more kinetically stable, which is in accordance with the analytical results of weak interactions, where the stronger weak interaction forces were presented, the more stable the molecule is. Finally, a comparative analysis of UV–Vis, IR, and fluorescence spectra were carried out.

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Solvent-driven self-assembly of two novel di- and tetra-nuclear Cu(II) bis(salamo)-based complexes

Cited by 49 publications

References 64 publications

Coordination-Driven Salamo-Salen-Salamo-Type Multinuclear Transition Metal(II) Complexes: Synthesis, Structure, Luminescence, Transformation of Configuration, and Nuclearity Induced by the Acetylacetone Anion

Coordination-Driven Salamo-Salen-Salamo-Type Multinuclear Transition Metal(II) Complexes: Synthesis, Structure, Luminescence, Transformation of Configuration, and Nuclearity Induced by the Acetylacetone Anion

Novel dinuclear Ni (II) Schiff base complexes induced noncovalent exchanges: Crystal structure investigation, electrochemical assessment, Hirshfeld surface analysis and SARS‐CoV‐2 docking study

Anion‐Modulated Construction of Two Novel Tetra‐ and Hepta‐Nuclear Ni(II) Salamo‐Type Clusters: Comparison of the DFT Calculations and Weak Interaction Analyses

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