Interactions between Copper(II) Complexes of Mono-, Bis-, and Tris(macrocyclic) Ligands and Inorganic or Organic Guests

Comba, Peter; Lampeka, Ya. D.; Nazarenko, Alexander Y.; Prikhod'ko, Alexander I.; Pritzkow, Hans

doi:10.1002/1099-0682(200206)2002:6<1464::aid-ejic1464>3.0.co;2-r

Cited by 26 publications

(20 citation statements)

References 43 publications

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“…These studies were based on melamine-derived mono-, bis-, and tris-macrocyclic copper(II) and nickel(II) complexes and their host-guest compounds with cyanometalates (341)(342)(343)(344)(345). Magnetic exchange through the cyano bridge was shown to lead to multivarious effects and based on a thorough interpretation, there is the possibility to tune the magnetic properties of heterooligonuclear complexes (345,346).…”

Section: New Developmentsmentioning

confidence: 99%

Bispidine Coordination Chemistry

Comba

Kerscher

Schiek

2007

Progress in Inorganic Chemistry

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198

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Section: New Developmentsmentioning

confidence: 99%

Bispidine Coordination Chemistry

Comba

Kerscher

Schiek

2007

Progress in Inorganic Chemistry

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143

198

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“…Vibrational spectra of the complexes have features, which are characteristic for both the melamine fragment and the tetraazamacrocyclic ligand nickel(II) core. Similar to the copper(II) compounds, [9] the number of transitions which correspond to the out-of-plane vibrations of the aromatic amino groups [δ(NH 2 ), 1660 cm Ϫ1 in melamine] are related to the nuclearity of the complexes and, for complexes of L 1 and L 2 , to the degree of protonation of the melamine fragment: three bands (1700, 1650, 1600 cm Ϫ1 ) are observed in the nickel(II) compounds of the protonated mono(macrocyclic) ligand (HL 1 ) ϩ ; two bands (1667 and 1600 cm Ϫ1 ) are characteristic for complexes of the protonated bis(macrocyclic) ligand (HL 2 ) ϩ ; one band is observed for complexes of the free bases ([Ni(L 1 )] 2ϩ , 1600 cm Ϫ1 ; [Ni 2 (L 2 )] 4ϩ , 1610 cm Ϫ1 ).…”

Section: Synthesismentioning

confidence: 99%

Cooperative Effects in the Binding of Substrates to Nickel(II) and Nickel(III) Complexes with a Bis(macrocyclic) Ligand

Comba¹,

Lampeka²,

Nazarenko³

et al. 2002

Eur. J. Inorg. Chem.

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Nickel(II) complexes of mono-and bis(macrocyclic) ligands are the products of a nickel(II)-assisted template reaction with 2,3,2-tet, melamine and formaldehyde [2,3,2-tet = bis−N,NЈ-(2-aminoethyl)propane-1,3-diamine; melamine = 2,4,6-triamino-1,3,5-triazine]. The structures of two four-coordinate, diamagnetic nickel(II) complexes (protonated and non-protonated form) and of a six-coordinated paramagnetic nickel(II) compound with the protonated ligand have been determined by X-ray crystallography. Electronic spectroscopy was used to analyze the equilibrium between the paramagnetic and diamagnetic forms, and the electrochemical properties have been studied extensively (Ni III/II and Ni II/I

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“…Perchlorate salts of these cations were obtained according to reported procedures [11,12]. Keggin acids H 3 [PW 12 O 40 ], H 4 [SiMo 12 O 40 ], and H 4 [SiW 12 O 40 ] were selected as the POM source.…”

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Kinetic features of the adsorption of water vapor by copper and nickel ammine complexes with polyoxometallate anions

Barna

Lampeka

2007

Theor Exp Chem

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The rate of adsorption of water vapor by compounds obtained from cationic copper(II) and nickel(II) ammine complexes and polyoxometallate anions may be described by the linear driving force mass transfer model as one or two parallel processes. The differences observed were attributed to differences in the crystal structure of the adsorbents.Polyoxometallates (POM) are a large family of anionic metal-oxygen cluster species with highly variable composition, structure, and electronic structure. These features impart POM with many valuable properties and may permit their use in catalysis, materials science, medicine, etc. [1][2][3][4]. In light of their fixed nanodimensional size, POM anions are also suitable building blocks for obtaining structurized materials (organometallic framework materials, OMF), which may be expected to have specific adsorption properties. However, this aspect of the chemistry of these compounds has hardly been studied.Recent investigations have shown that ionic OMF with the general formula M n [Cr 3 O(OOCR) 6 (H 2 O) 3 ][XW 12 O 40 ]·mH 2 O (M = K + or Cs + , R = H or Et, X = Si IV or Co II ) [5-9] and the complex [Pd(en)(bpy)] 2 [SiW 12 O 40 ]·8DMSO·4DMF (en = ethylenediamine, bpy = 4,4¢-bipyridyl) [10] have a number of features distinguishing them from other adsorbents derived from organometallic compounds without POM.Firstly, the hydrophilic nature of the oxometallate building blocks leads to high selectivity of these adsorbents relative to polar molecules such as water, acetone, alcohols, and nitriles and their virtual inability to adsorb nonpolar adsorbates or molecules, which interact with the adsorbent by means of van der Waals forces [5-10]. Such molecules include nitrogen [7,8,10], which makes the use of the traditional adsorption chemistry methods for analyzing the porous structure of these compounds impossible. Secondly, as noted for compounds with M n [Cr 3 O(OOCR) 6 (H 2 O) 3 ] (n+1)+ cations, variation of the alkali metal and organic fragment permit fine control of the selectivity of the adsorption processes due to slight changes in the crystal lattice parameters. Thus, the complex Cs 5 [Cr 3 O(OOCH) 6 (H 2 O) 3 ][CoW 12 O 40 ] selectively adsorbs water in the presence of methanol and ethanol [6], while K 2 [Cr 3 O(OOCH) 6 (H 2 O) 3 ][CoW 12 O 40 ] also binds alcohols and nitriles with two or less carbon atoms in addition to water [7]. Similar behavior is found for K 2 [Cr 3 O(OOCC 2 H 5 ) 6 (H 2 O) 3 ][SiW 12 O 40 ] with the distinction that this compound also adsorbs alcohols with four or more carbon atoms [8]. The replacement of the potassium ions in this complex by cesium ions leads to the appearance of additional hydrophobic channels in its lattice, capable of binding dichloromethane molecules. This process occurs independently of the adsorption of water molecules in the hydrophilic channels [9].In light of the very limited number of compounds studied and their interesting properties, we investigated the adsorption characteristics of other compounds containing POM. For thi...

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Interactions between Copper(II) Complexes of Mono-, Bis-, and Tris(macrocyclic) Ligands and Inorganic or Organic Guests

Cited by 26 publications

References 43 publications

Bispidine Coordination Chemistry

Bispidine Coordination Chemistry

Cooperative Effects in the Binding of Substrates to Nickel(II) and Nickel(III) Complexes with a Bis(macrocyclic) Ligand

Kinetic features of the adsorption of water vapor by copper and nickel ammine complexes with polyoxometallate anions

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