Self-assembly of copper and cobalt complexes with hierarchical size and catalytic properties for hydroxylation of phenol

Dong, Hua; Tao, Wenbo; Bi, Jianhong; Milway, Victoria A.; Xu, Zhiqiang; Zhang, Shengyi; Meng, Xiangchao; Bi, Wentao; Li, Jian; Li, Meng

doi:10.1186/1556-276x-6-484

Cited by 68 publications

(7 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The copper ion is coordinated to two nitrogen atoms (N1, N2) and carboxylate oxygen atom (O2) of the tridentate primary ligand BIGH and two nitrogen atoms (N4, N5) of bpy. The value of the structural index ( τ ) of complex 1 is 0.58 ( τ = ( β − α )/60, where β = O2–Cu1–N5 = 141.9°and α = N1–Cu1–N4 = 176.80°). For perfect trigonal bipyramidal and square pyramidal geometries, the τ values are unity and zero, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Thermal behaviour of the complexes was studied using TGA and differential thermal analysis (DTA) at 0–800 ° C as shown in Figure S15 (supporting information). TGA data listed in Table show the loss of lattice water molecule in the range 80–120 ° C and loss of perchlorate ion in the range 210–220 ° C . Complexes 3 and 4 were found to be thermally unstable and exhibit a single‐stage decomposition pattern above 250 ° C.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

DNA binding and in vitro anticancer activity of 2‐((1H‐benzimidazol‐2‐yl)methylamino)acetic acid and its copper(II) mixed‐polypyridyl complexes: Synthesis and crystal structure

Sabithakala

Chittireddy

2018

Applied Organom Chemis

View full text Add to dashboard Cite

New copper(II) ternary complexes formulated as [Cu(N‐N)BIG]ClO4, where BIG is deprotonated 2‐((1H‐benzimidazol‐2‐yl)methylamino)acetic acid and N‐N represents 2,2′‐bipyridine (1) or 4,4′‐dimethyl‐2,2′‐bipyridine (2) or 5,5′‐dimethyl‐2,2′‐bipyridine (3) or 1,10‐phenanthroline (4) or 4,5‐diazafluoren‐9‐one (5) or dipyridylamine (6), were synthesized and characterized using analytical and spectral methods. Complex 1 was characterized using single‐crystal X‐ray diffraction analysis and found to be monomeric in nature with distorted square pyramidal geometry. The binding interactions of 1–6 with calf thymus DNA were studied using UV–visible absorption and emission spectroscopy and viscosity measurements. The DNA cleavage ability of 1–6 with pUC19 DNA shows that the complexes can cleave DNA without any external agents. The ligand and complexes were investigated for their in vitro antibacterial activity against Bacillus subtilis and Staphylococcus aureus. The complexes showed enhanced antibacterial activities compared to the free ligand. Molecular docking studies of complexes 1–6 were made using Genetic Optimization of Ligand Docking (GOLD) software. The study indicated that LEU23, ASP25, ILE84, ASN144 and ARG87 of COX‐2 were important for strong hydrogen bonding interaction with the complexes. Among the complexes, 2 showed the best docking result with COX‐2. Cytotoxicity assay was performed using MTT reagent against human cervical cancer cells, human breast cancer cells and human lung cancer cells. The complexes were found to show moderate anticancer activity.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

DNA binding and in vitro anticancer activity of 2‐((1H‐benzimidazol‐2‐yl)methylamino)acetic acid and its copper(II) mixed‐polypyridyl complexes: Synthesis and crystal structure

Sabithakala

Chittireddy

2018

Applied Organom Chemis

View full text Add to dashboard Cite

show abstract

“…q e (mg g −1 ) k 2 (g mg −1 h −1 ) AIC BIC q e (mg g −1 ) k 1 (h −1 ) AIC BIC 10 Adsorption Science & Technology site availability (e.g., by rearranging of adsorbed species) or the occurrence of metal nucleation induced by the salenmetal initial interaction [107][108][109]. EDS spectra support this conclusion, since some copper was quantified using a large area of sample.…”

Section: Modified Pseudo-second Order Modelmentioning

confidence: 88%

A New Schiff Base Organically Modified Silica Aerogel-Like Material for Metal Ion Adsorption with Ni Selectivity

Vareda

Matos

Valente

et al. 2022

Adsorption Science & Technology

View full text Add to dashboard Cite

Nickel has several industrial uses and is a valuable metal, making its selective separation and recycling a priority goal. A novel adsorbent, a Schiff base organically modified silica (ORMOSIL) aerogel, was prepared, for selective nickel removal from wastewater with other metal ions, by including a salen ionophore in the silica-based network. The newly developed adsorbent takes advantage of the salen’s selectivity and of the high porosity of silica aerogels. The aerogel-like adsorbent was prepared via sol-gel chemistry, using a coprecursor approach and ambient pressure drying. The inclusion of the Schiff base in the silica network was accomplished by reacting an amine-containing silica precursor with an aldehyde and confirmed by nuclear magnetic resonance (NMR) analysis. The adsorbent shrunk only 10% after evaporative drying, which resulted in a highly porous material (85% porosity, 4 cm3 g−1 specific pore volume). The low surface area of 28 m2 g-1 was due to the predominantly macroporous structure of the material (mean pore diameter of 563 nm). Adsorption isotherms and kinetic curves with single and binary mixtures of cations at room temperature were used to assess the selectivity of the adsorbent. The adsorption follows a BET (Brunauer-Emmett-Teller) trend. Due to the proximity of the oxygen and nitrogen atoms in the salen and steric hindrance from their neighboring atoms, it is likely that only the smallest hydrated cations can act as a coordination center and interact with both donor atoms. Thus, nickel was fairly removed (50 mg g-1), while other cations barely interacted with the adsorbent (cadmium adsorption maximum of 5 mg g-1). The estimated selectivity coefficient for nickel ranges from 1.8, in relation to copper, to 9.4 relatively to cadmium, which can be relevant for the separation of nickel in several industrial contexts, for instance, from electroplating sludge.

show abstract

“…Copper complexes are used for a wide range of applications and it is important to continue making new coppercontaining complexes to study their biological activity, pharmaceutical application and catalytic chemistry [1][2][3][4][5][6] . The copper complexes can have different number of coordinates, generally from 2 to 6 and a variety of structures.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Crystal Structure of a New Copper Complex: [Cu(Phen)(H2O)2SO4]

Hu¹,

Zao²

2013

Asian J. Chem.

View full text Add to dashboard Cite

A novel copper complex [Cu(Phen)(H2O)2SO4] was synthesized and characterized by IR spectra and single-crystal X-ray analysis. The crystal structure analysis shows that the Cu(II) has five coordinates in square-pyramid geometry. The complex forms bimolecular chains through hydrogen bonding interactions. In addition, an intermolecular π-π interaction is observed between the two parallel 1,10phenanthroline rings of the neighboring molecules. The crystal is monoclinic and has space group C2/c with the following unit cell parameters:

show abstract

Self-assembly of copper and cobalt complexes with hierarchical size and catalytic properties for hydroxylation of phenol

Cited by 68 publications

References 43 publications

DNA binding and in vitro anticancer activity of 2‐((1H‐benzimidazol‐2‐yl)methylamino)acetic acid and its copper(II) mixed‐polypyridyl complexes: Synthesis and crystal structure

DNA binding and in vitro anticancer activity of 2‐((1H‐benzimidazol‐2‐yl)methylamino)acetic acid and its copper(II) mixed‐polypyridyl complexes: Synthesis and crystal structure

A New Schiff Base Organically Modified Silica Aerogel-Like Material for Metal Ion Adsorption with Ni Selectivity

Synthesis and Crystal Structure of a New Copper Complex: [Cu(Phen)(H2O)2SO4]

Contact Info

Product

Resources

About