ChemInform Abstract: Dynamic Study of Metal-Ion Incorporation into Porphyrins Based on the Dynamic Characterization of Metal Ions and on Sitting-Atop Complex Formation.

ChemInform ◽  
2010 ◽  
Vol 33 (1) ◽  
pp. no-no
Author(s):  
Shigenobu Funahashi ◽  
Yasuhiro Inada ◽  
Masahiko Inamo
Keyword(s):  
Complex Formation ◽  
Metal Ions ◽  
Metal Ion ◽  
Dynamic Study ◽  
Dynamic Characterization ◽  
Ion Incorporation

Adsorption of Cu2+ Metal Ions on Dithizone-Immobilized Natural Bentonite

2020 ◽  
Vol 840 ◽  
pp. 64-70
Author(s):  
Dian Mira Fadela ◽  
Mudasir Mudasir ◽  
Adhitasari Suratman
Keyword(s):  
Adsorption Isotherm ◽  
Complex Formation ◽  
Metal Ions ◽  
Electrostatic Interaction ◽  
Metal Ion ◽  
Synthesis And Characterization ◽  
Optimum Conditions ◽  
Initial Concentration ◽  
Activated Bentonite

The research of adsorption of Cu2+ metal ion on dithizone-immobilized natural bentonite (DNB) had been carried out. The experiment was begun by the activation of natural bentonite with HCl 4 M and dithizone-immobilized on activated bentonite surface. This study included synthesis and characterization of dithizone-immobilized bentonite and its application in adsorption of Cu2+ metal ions. The type of interaction occurred in the adsorption was tested by sequential desorption. The result showed that dithizone successfully immobilized on activated natural bentonite (ANB). The optimum conditions for Cu2+ metal ions adsorption using dithizone-immobilized natural bentonite are at pH 5; 0.1 g mass of adsorbent, with interaction time 60 min, and the initial concentration of ion at 80 ppm. Kinetics and adsorption isotherm studies suggest that the capacity, of the dithizone-immobilized natural bentonite in adsorbing Cu2+ metal ion is significantly improved compared to activated natural bentonite. The adsorption of Cu2+ metal ions by activated natural bentonite was through several interactions dominated by electrostatic interaction (82%). Otherwise, the interaction of dithizone-immobilized natural bentonite with Cu2+ metal ions in the sequence were dominated by the mechanism of complex formation of (75%). The result shows that the immobilization of dithizone changes the type of electrostatic interaction into complex formation.

scholarly journals Synthesis and Characterization of Piperidin-4-one Derivatives Using Green Solvent

2020 ◽  
Vol 32 (4) ◽  
pp. 727-732
Author(s):  
Harish Sharma ◽  
Rajesh Kumar ◽  
Mahesh Chandra Vishwakarma ◽  
Sushil Kumar Joshi ◽  
Narender Singh Bhandari
Keyword(s):  
Metal Ions ◽  
Contact Time ◽  
Metal Ion ◽  
Low Cost ◽  
Ion Concentration ◽  
Green Solvent ◽  
Optimum Ph ◽  
Influence Of Ph ◽  
Biosorption Equilibrium

In present study, Pyras pashia leaves were used as low cost biosorbent to study biosorption of Cu(II), Pb(II) and Cd(II) ions from contaminated wastewater. In the employed batch methods pH, contact time, metal ion concentration, temperature, biosorbent doses were taken as study parameters. The pH was varied from pH 1-9 to study the influence of pH on biosorption of metal ions by Pyras pashia. The optimum pH for the removal of Cu(II), Pb(II) and Cd(II) is observed at pH 5. The biosorption equilibrium time was varied between 15-75 min. Langmuir, Freundlich and Temkin isotherms were employed to study the biosorption. The biosorption parameter fits well with Langmuir isotherm. The biosorption of metal ions was increased with increasing biosorbent dose and contact time while increase in pH, metal ion concentration and temperature decrease the biosorption. Thermodynamic data suggest that the bisorption process was spontaneous, feasible and endothermic.

Structural variations of trinitrato(terpyridine)lanthanoid complexes

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mahsa Armaghan ◽  
Khodabakhsh Darzinezhad ◽  
Mostafa M. Amini ◽  
Christoph Janiak
Keyword(s):  
Metal Ions ◽  
Coordination Number ◽  
Structural Characterization ◽  
Metal Ion ◽  
Hirshfeld Surface ◽  
Structural Variations ◽  
Coordination Polyhedra ◽  
Percentage Contribution ◽  
Terpyridine Ligands

Abstract The structural characterization of the newly synthesized trinitrato(terpyridine)lanthanoid complexes [Nd(NO3)3(pytpy)(H2O)] (1), [Eu(NO3)3(pytpy)(EtOH)]·EtOH (2·EtOH) and [Tb(NO3)3(ptpy)(EtOH)] (3), with the modified terpyridine ligands pytpy = 4′-(pyridin-3-yl)-2,2′:6′,2″-terpyridine and ptpy = 4′-phenyl-2,2′:6′,2″-terpyridine, show all a coordination number of 10 at the metal ion with three bidentate nitrato ligands and an additional solvent ligand. The coordination polyhedra around the metal ions are highly irregular. Hirshfeld surface analyses of the intermolecular interactions show (C/O–)H⋯O bonding having the largest percentage contribution in all three structures, while there are remarkably few π-π interactions despite the numerous aryl rings.

Coordination arrays — Synthesis and characterization of tetranuclear complexes of grid-type

2004 ◽  
Vol 82 (10) ◽  
pp. 1428-1434 ◽  
Author(s):  
Garry S Hanan ◽  
Dirk Volkmer ◽  
Jean-Marie Lehn
Keyword(s):  
Metal Ions ◽  
Self Assembly ◽  
Metal Ion ◽  
Transition Metal Ions ◽  
Tridentate Ligands ◽  
H Nmr ◽  
Nitrogen Ligands ◽  
Metal Metal ◽  
Tetranuclear Complexes

A series of tetranuclear metal complexes of grid-type consisting of four bis-tridentate ligands and four divalent transition metal ions were synthesized and characterized. The 1H NMR spectra of diamagnetic complexes containing Zn(II), Cd(II), Fe(II), and Ru(II) was correlated to the radius of the metal ion. The UV–vis and electrochemical results indicated that the bridging ligand π* orbital and the dπ metal orbital are stabilized by complexation of more than one metal ion. Furthermore, the Co(II) and Fe(II) grids exhibit metal–metal interaction mediated by the bis-tridentate ligands as indicated by electrochemical and spectroscopic methods. These results provide guidelines for the design of larger grids bearing several metal centres in a square arrangement, which also represent potential components of molecular electronic devices.Key words: complexes with nitrogen ligands, octahedral metal ions, self-assembly, supramolecular chemistry.

scholarly journals Synthesis of N-Pyridin-2-ylmethyl and N-Quinolin-2-ylmethyl ­Substituted Ethane-1,2-diamines

SynOpen ◽  
2017 ◽  
Vol 01 (01) ◽  
pp. 0147-0155 ◽  
Author(s):  
Yi-Qiu Yang ◽  
Long-Zhi Ke ◽  
Gui-Fei Wang ◽  
Shu-Yong Song ◽  
Ming-Ning Qiu ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Metal Ions ◽  
Targeted Delivery ◽  
Metal Ion ◽  
Synthesis And Characterization ◽  
Long Wavelength ◽  
Initial Work ◽  
Wavelength Light

Two N-(2-(bis(pyridin-2-ylmethyl)amino)ethyl)quinoline-2-carboxamides and two N-(2-(bis(quinolin-2-ylmethyl)amino)ethyl)quinoline-2-carboxamides have been synthesized. These structures contain five nitrogen atoms that can form coordinate bonds with metal ions such as Mn(II) and Fe(II). An additional coordinating bond can be formed between the metal ion and a neutral molecule of nitric oxide (NO). The resultant complexes are potentially useful agents for targeted delivery of NO to in vivo biological sites such as tumors, where the NO is released upon irradiation with long-wavelength light. Initial work involving the synthesis and characterization of these analogues is reported here.

Sign in / Sign up

Export Citation Format

Share Document