Coordination motifs in modern supramolecular chemistry

Alexeev, Yu.E.; Kharisov, Boris I.; García, Tomás Constantino Hernández; Garnovskii, A. D.

doi:10.1016/j.ccr.2009.12.003

Cited by 117 publications

(40 citation statements)

References 206 publications

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“…Temperature-dependent measurements of the magnetic susceptibility of LIGPOH and PAWBOF revealed strong antiferromagnetic coupling, as expected for dinuclear copper(II) carboxylate units. [Cu 4 (CH 3 COO) 6 (μ 3 -OH) 2 (μ-dtdp) 2 ] n (PAWBIZ) and [Cu 4 (HCOO) 6 (μ 3 -OH) 2 (μ-dtdp) 2 ] n (VUKFUD) represent two ribbon structures based on similar tetranuclear μ 3 -hydroxido-bridged copper(II) carboxylate nodes ( Figure 23). Crystals of PAWBIZ were obtained by recrystallisation of an initial pale-green precipitate resulting from the reaction of dtdp and Cu(CH 3 COO) 2 ·H 2 O in methanol [86].…”

Section: Coordination Polymers Based On Metal Carboxylate Clustersmentioning

confidence: 99%

“…Figure 23. Repeated rhomboid related coordination polymer strands based on tetranuclear basic copper(II) carboxylate nodes in (a) [Cu 4 (CH 3 COO) 6 (μ 3 -OH) 2 (μ-dtdp) 2 ] n (PAWBIZ) and (b) [Cu 4 (HCOO) 6 (μ 3 -OH) 2 (μ-dtdp) 2 ] n (VUKFUD). [94] contain multinuclear nodes composed of Cu(II) and dicarboxylic acid dianions, namely oxalate and malate, respectively.…”

Section: Coordination Polymers Based On Metal Carboxylate Clustersmentioning

confidence: 99%

“…Metallosupramolecular chemistry also offers the promise of novel materials with interesting properties. Discrete metallosupramolecular assemblies, e.g., metallamacrocycles, box and cage compounds, have been used, for example, as receptors and reaction containers [5][6][7][8][9][10]. Potential applications in catalysis, gas-storage, separation, sensing, magnetism, optics and electrochemistry have often been mentioned in connection with coordination polymers [11][12][13][14][15][16][17].…”

Section: Introduction and Scopementioning

confidence: 99%

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Structural Diversity of Metallosupramolecular Assemblies Based on the Bent Bridging Ligand 4,4′-Dithiodipyridine

2013

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4,4′-Dithiodipyridine (dtdp), also termed 4,4′-dipyridyldisulfide, is a bridging ligand of the 4,4′-bipyridine type. The introduction of the disulfide moiety inevitably leads to a relatively rigid angular structure, which exhibits axial chirality. More than 90 metal complexes containing the dtdp ligand have been crystallographically characterised until now. This review focuses on the preparation and structural diversity of discrete and polymeric metallosupramolecular assemblies constructed from dtdp as bridging ligands. These encompass metallamacrocycles with M 2 L 2 topology and coordination polymers with periodicity in one or two dimensions. One-dimensional coordination polymers represent the vast majority of the metallosupramolecular structures obtained from dtdp. These include repeated rhomboids, zigzag, helical and arched chains among other types. In this contribution, we make an attempt to provide a comprehensive account of the structural data that are currently available for metallosupramolecular assemblies based on the bent bridging ligand dtdp. OPEN ACCESSPolymers 2013, 5 528

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Section: Coordination Polymers Based On Metal Carboxylate Clustersmentioning

confidence: 99%

Section: Coordination Polymers Based On Metal Carboxylate Clustersmentioning

confidence: 99%

Section: Introduction and Scopementioning

confidence: 99%

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Structural Diversity of Metallosupramolecular Assemblies Based on the Bent Bridging Ligand 4,4′-Dithiodipyridine

2013

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“…Son yıllarda, proton transfer reaksiyonlarına dayanan yeni aktif farmasötik katkı maddelerinin tasarımı ve geliştirilmesi sağlanmıştır [17,18]. Bir amin ve bir karboksilik asit tarafından oluşturulan proton transfer tuzu bir veya iki molekül arasında çok yönlü bağlantı oluşturabilir [15,16]. Yük-destekli hidrojen bağlarının etkileşiminin gücü nötr hidrojen bağı etkileşimlerinden daha fazladır [19][20].…”

Section: Introductionunclassified

Bazı karboksilik asitlerden elde edilen proton transfer tuzlarının ve Cu (II) komplekslerinin sentezi ve karakterizasyonu

Büyükkıdan

Demir²,

Büyükkıdan³

2017

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Bu çalışmada 2-amino-3-metilpiridinin (amp), 1,4-pirazin-2,3-dikarboksilik asit (H 2 pyzdc) ve tiyoglikolik asit (Htga) ile reaksiyonundan sırasıyla proton transfer tuzları (Hamp) + (Hpyzdc) -(1) ve (Hamp) + (tga) -(2) elde edilmiştir. Daha sonra elde edilen tuzların (1 ve 2) Cu(CH 3 COO) 2 .2H 2 O ile reaksiyonundan ise metal kompleksleri (Hamp) 2 [Cu 3 (pyzdc) 4 (H 2 O) 6 ].8H 2 O (3) ve (Hamp) 2 [Cu(tga) 2 (H 2 O) 2 ].2H 2 O (4) sentezlenmiştir. Tuzların yapıları 1 H ve 13 C-NMR, FT-IR ve UV-Vis spekroskopileri ve elementel analiz yöntemleri ile aydınlatılmıştır. Tek kristali elde edilemeyen komplekslerin yapıları ise FT-IR, UV-Vis, ICP-OES, manyetik duyarlılık ve elementel analiz tekniklerinden elde edilen sonuçların değerlendirilmesiyle önerilmiştir.

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“…7 Polydentate (n > 4) tripodal ligands are generally synthesized by the derivatization of (tri/tetra)dentate tripodal platforms, such as cis,cis-1,3,5-triaminocyclohexane (tach), tris-(2-aminoethyl)amine (tren) or nitrilotriacetic acid (nta). Such modifications may provide additional donor site(s), may influence the steric environment around the metal centre or may help introduce further metal binding site(s) in order to create polynuclear complexes.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the local environment around metal ions: a solution chemical and structural study of some multidentate tripodal ligands

et al. 2017

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Manganese(II), copper(II) and zinc(II) complexes of four polydentate tripodal ligands (tachpyr (N,N',N''-tris (2-pyridylmethyl)-cis,cis-1,3,5-triaminocyclohexane), trenpyr (tris[2-(2-pyridylmethyl)aminoethyl]amine, tach3pyr (N,N',N''-tris(3-pyridylmethyl)-cis,cis-1,3,5-triaminocyclohexane) and tren3pyr (tris[2-(2-pyridylmethyl)aminoethyl]amine)) were characterized in both solution and solid states. A combined evaluation of potentiometric, UV-VIS, NMR and EPR data allowed the conclusion of both thermodynamic and structural information about the complexes formed in solution. The four tailored polydentate tripodal ligands studied here exhibit a high thermodynamic stability, and a variety of coordination environments/geometries for the studied transition metal ions. Our data indicate that tachpyr is a more efficient zinc(II) chelator and a similar copper(II) chelator compared to trenpyr. Considering the higher number of N-donors and conformational flexibility of trenpyr, as well as the energy demanding switch to the triaxial conformation required for metal ion binding of tachpyr, the above observation is surprising and is very likely due to the encapsulating effect of the more rigid tachpyr skeleton. This relative binding preference of tachpyr for zinc(II) may be related to the observation that zinc(II) is one of the principal metals targeted by tachpyr in cells. In contrast, trenpyr is a considerably more efficient manganese(II) chelator, since it acts as a heptadentate ligand in the aqueous Mn(trenpyr) complex. The crystal structures of copper(II) and zinc(II) complexes of tachpyr indicated important differences in the ligand conformation, induced by the position of counter ions, as compared to earlier reports. The closely related new ligands, tach3pyr and tren3pyr, have been designed to form oligonuclear complexes. Indeed, we obtained a three dimensional polymer with a copper(II)/tren3pyr ratio of 11/6. Within this metal-organic framework, three distinctly different copper geometries can be identified: square pyramidal, trigonal bipyramidal and tetrahedral. Two square pyramidal and four trigonal bipyramidal copper centres create a hexanuclear subunit with a large inside cavity. These moieties are linked by tetrahedral copper(II) centres, constructing the three-dimensional polymer structure. The formation of such polynuclear complexes was not detected in solution. Both tach3pyr and tren3pyr form only mononuclear complexes with square pyramidal and trigonal bipyramidal geometries, respectively.

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Coordination motifs in modern supramolecular chemistry

Cited by 117 publications

References 206 publications

Structural Diversity of Metallosupramolecular Assemblies Based on the Bent Bridging Ligand 4,4′-Dithiodipyridine

Structural Diversity of Metallosupramolecular Assemblies Based on the Bent Bridging Ligand 4,4′-Dithiodipyridine

Bazı karboksilik asitlerden elde edilen proton transfer tuzlarının ve Cu (II) komplekslerinin sentezi ve karakterizasyonu

Tailoring the local environment around metal ions: a solution chemical and structural study of some multidentate tripodal ligands

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