Syntheses and characterizations of the cyanide-bridged heteronuclear polymeric complexes with 2-ethylimidazole

Karaağaç, Dursun; Kürkçüoğlu, Güneş Süheyla

doi:10.4314/bcse.v30i2.10

Cited by 12 publications

(4 citation statements)

References 18 publications

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“…The DRIFT spectra of MAF-6 samples with different particle sizes are shown in Figures 3 and S5 (Supporting Information). In spectra of samples, the bands observed in the regions of 3650-3300 cm −1 and 1550-1650 cm −1 may be attributed to the ν (OH) stretching mode of water and alcohol molecules [52][53][54]. The 2-ethylimidazole has bands in the region of 2800-3150 cm −1 and at 1152 cm −1 which are assigned to the ν (CH3) and ν (CH2) asymmetric and symmetric stretching frequencies and ρ (CH2) in-plane rocking vibration frequency, respectively.…”

Section: Nature Of Active Sites Of Maf-6mentioning

confidence: 98%

Effect of MAF-6 Crystal Size on Its Physicochemical and Catalytic Properties in the Cycloaddition of CO2 to Propylene Oxide

et al. 2021

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Zeolitic imidazolate frameworks MAF-5 and MAF-6 based on Zn2+ and 2-ethylimidazole were demonstrated to be efficient heterogeneous catalysts in solvent-free coupling of CO2 and propylene oxide (PO) to produce propylene carbonate (PC) at 0.8 MPa of CO2 and 80 °C. Activity of MAF-5 was lower in comparison with MAF-6 due to the difference in their structural and textural characteristics. MAF-6 samples with particle size of 190 ± 20, 360 ± 30, and 810 ± 30 nm were prepared at room temperature from [Zn(NH3)4](OH)2 and 2-ethylimidazole. Control of particle size was achieved by variation of type of alcohol in alcohol/cyclohexane media for the preparation of MAF-6. According to this comprehensive study, the yield of PC was found to decrease with increasing crystal size of the MAF-6 material, which was related to the change in textural properties and the number and localization of active sites. The combination of MAF-6 with particle size of with particle size of 190 ± 20 nm and tetrabutylammonium bromide ([n-Bu4N]Br) as co-catalyst led to an approximately 4-fold enhancement in the yield of PC (80.5%). Compared with reported ZIFs catalysts, the efficiencies of MAF-5/[n-Bu4N]Br and MAF-6/[n-Bu4N]Br binary systems were comparable and higher under similar reaction conditions.

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Section: Nature Of Active Sites Of Maf-6mentioning

confidence: 98%

Effect of MAF-6 Crystal Size on Its Physicochemical and Catalytic Properties in the Cycloaddition of CO2 to Propylene Oxide

et al. 2021

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“…Also, a band appearing in the range 3081-2864 cm À1 is assigned for the C H (aromatic) stretching frequency [35]. The vibrational frequency appearing in the range 1644-1595 cm À1 can be attribute for the symmetric stretching frequency of C N group of imidazole ring present in the compounds (IM-1 to IM6-6) [36]. The C C aromatic stretching frequency was observed in the range 1556-1448 cm À1 [37].…”

Section: Ftir Spectral Studiesmentioning

confidence: 99%

Synthesis, physico‐chemical characterization and theoretical exploration of some 2,4,5‐triaryl imidazole derivatives

Chettri¹,

Tamang²,

Rai

et al. 2023

Journal of Heterocyclic Chem

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A series of six 2, 4, 5‐triarylimidazole (IM‐1 to IM‐6) have been prepared by the multi‐component condensation reaction involving benzil, substituted salicylaldehyde and NH4OAc under solvent free condition by using unconventional CuB4O7 catalyst. The compounds were characterized using various analytical and spectroscopic techniques. Furthermore, DFT studies such as optimization of gas phase structure, HOMO‐LUMO energies, Molecular electrostatic potential, NLO properties of these compounds have been investigated. In‐silico molecular docking study of 2, 4, 5‐triarylimidazole derivatives (IM‐1 to IM‐6) have been carried out to ascertain the inhibitory potential of these molecules against a diabetic protein (PDB ID 1IR3). The study showed that the these compounds have remarkable inhibitory potential against the protein 1IR3 with binding energy (ΔG) values for the compounds (IM‐1 to IM‐6) −8.7, −8.4, −8.8, −8.0, −8.9 and −7.8 kcal/mol respectively. In addition, the pharmacokinetic properties (ADMET) of the compounds (IM‐1 to IM‐6) have also been studied.

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“…In addition, lattice or coordinated water absorbs between 3550 and 3200 cm -1 . 31,32 It was observed from the infrared spectra of the complexes that there are water molecules in the structure of the complexes, and it was determined that the water molecules in the complexes act as crystal water (uncoordinated water molecules). The ѵ(OH) of water molecules in the complexes were observed as broadband between 4000 and 3500 cm -1 for uncoordinated water molecules of the complexes and at 3454 cm -1 for coordinated water molecules of complex 2.…”

Section: Water Vibrationsmentioning

confidence: 99%

Preparation and Characterisation of the Cyano-Bridged Transition Metal Complexes Using N,N-Diethyl Thiourea as a Ligand

Karaağaç

2021

S.Afr.j.chem.

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New cyano bridged transition metal complexes, [Cu(detu)4Ni(CN)4]-2H2O (1) and [Zn(H2O)(detu)Ni(CN)4]-2H2O (2) (detu = N, N' diethyl thiourea) have been synthesised in powder form. Their structures were illuminated by using spectroscopic, thermal and elemental analysis techniques. The nickel atom exhibits square planar geometry in these complexes by coordinating with the cyano group's nitrogen atoms. The copper atom of 1 is six coordinated with two bridging cyano groups and four detu ligands. In contrast, the zinc atom of 2 is six coordinated with four bridging cyano groups, one detu ligand and one aqua ligand. In addition, the structure of 2 is formed from polymeric layers of |Zn-Ni(CN)41 „ with the detu and aqua ligands bonded to the zinc atom. Thermal stabilities and decomposition products of 1 and 2 were examined in the static air atmosphere between 30 and 900 °C. Keywords: btetracyanonickelate(II) complex, N,N'-diethyl thiourea, cyano-bridged complex, vibration spectra, thermal analysis.

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Syntheses and characterizations of the cyanide-bridged heteronuclear polymeric complexes with 2-ethylimidazole

Cited by 12 publications

References 18 publications

Effect of MAF-6 Crystal Size on Its Physicochemical and Catalytic Properties in the Cycloaddition of CO2 to Propylene Oxide

Effect of MAF-6 Crystal Size on Its Physicochemical and Catalytic Properties in the Cycloaddition of CO2 to Propylene Oxide

Synthesis, physico‐chemical characterization and theoretical exploration of some 2,4,5‐triaryl imidazole derivatives

Preparation and Characterisation of the Cyano-Bridged Transition Metal Complexes Using N,N-Diethyl Thiourea as a Ligand

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