Binding sites on the outside of metallo-supramolecular architectures; engineering coordination polymers from discrete architectures

Pascu, Mirela; Tuna, Floriana; Kołodziejczyk, Edyta; Pascu, Gabriel I.; Clarkson, Guy J.; Hannon, Michael J.

doi:10.1039/b403749a

Cited by 37 publications

(18 citation statements)

References 69 publications

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“…4,6 In an initial supramolecular event the distinct metallo-supramolecular architecture is assembled, and then, in a second supramolecular event, this supramolecular architecture is assembled into a higher-order array. We have recently described examples where hydrogen-bond interactions 7,8 or metal-ligand interactions 9 are used to assemble pyridylimine metallo-supramolecular architectures into higher order structures and shown that this can be used to influence magnetic spincrossover properties. 7 Herein by introducing extended p systems into the array we explore the use of p-p interactions to aggregate such pyridylimine architectures.…”

Section: Introductionmentioning

confidence: 99%

Aggregation of imine-based metallo-supramolecular architectures through π–π interactions

et al. 2006

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The design of supramolecular architectures based on isoquinoline-imine ligand systems is described. The isoquinoline affords an extended pi surface and the use of this surface to obtain self-recognition and consequent pi-pi aggregation is investigated. The approach is effective in that each of four complexes is observed to aggregate through these interactions. Other pi-pi interactions can interfere with the aggregation indicating that a larger pi-surface may be required to obtain complete control over the aggregation of the units.

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Section: Introductionmentioning

confidence: 99%

Aggregation of imine-based metallo-supramolecular architectures through π–π interactions

et al. 2006

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“…For the use of dinucleating N-heterocyclic ligands in crystal engineering, see: Pascu et al (2004). For metal complexes of Schiff base ligands in coordination chemictry, see: Coles et al (1998); Gourbatsis et al (1999).…”

Section: Related Literaturementioning

confidence: 99%

“…Pyrazines themselves are well known dinucleating ligands and, as many dinucleating N-heterocyclic ligands, have attracted much attention from crystal engineers (Pascu et al, 2004). On the other hand, Schiff base ligands have played an integral role in the development of coordination chemistry since the late 19 th century.…”

Section: Commentmentioning

confidence: 99%

Dichlorido{N-[1-(pyrazin-2-yl)ethylidene-κN¹]ethane-1,2-diamine-κ²N,N′}zinc

Liu

Omer

et al. 2011

Acta Cryst E

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“…ESI + -MS: m/z = 359.1972. EA for C 21 (8). Complex 8 was obtained by a similar procedure as for 5 except for using Ni(NO 3 ) 2 ·6H 2 O instead of Cu(ClO 4 ) 2 ·6H 2 O.…”

Section: ■ Introductionmentioning

confidence: 99%

Assembly of Binuclear, Tetranuclear, and Multinuclear Complexes from Pincer-Like Mononuclear Metallotectons: Structural Diversity Dependent on Precursors

Zheng

Pan

Kai

et al. 2015

Crystal Growth & Design

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Reactions of Cu(II), Cd(II), and Ni(II) with a new tetradentate ligand N 1 ,N 3 -bis(1-(1H-benzimidazol-2-yl)-ethylidene)propane-1,3-diamine (H 2 bbepd) afforded four mononuclear pincer-like complexes of [Cu(H 2 bbepd)(ClO 4 )]-·CH 3 OH·ClO 4 (1), [Cd(H 2 bbepd)(CH 3 OH)(ClO 4 )]· CH 3 OH·ClO 4 (2), [Ni(H 2 bbepd)(H 2 O) 2 ]·2ClO 4 (3), and [Ni(H 2 bbepd)(NO 3 ) 2 ] (4), respectively. The labile small coordinated components (anions or solvent molecules) on the apical coordination site of metal ions in complexes 1−4 display three different modes, which can be substituted by 4,4′-bipyridine (bpy) to obtain four new multinuclear complexes of [Cu 2 (H 2 bbepd) 2 (bpy)] 2 ·4ClO 4 (5), [Cd 4 (H 2 bbepd) 4 (bpy) 3 -(ClO 4 ) 2 ]·6ClO 4 ·(bpy)·2CH 3 OH·6H 2 O (6), {[Ni(H 2 bbepd)-(bpy)]·2ClO 4 ·CH 3 OH} n (7), and {[Ni (H 2 bbepd)(bpy)]·2NO 3 ·CH 3 OH·H 2 O} n (8), respectively. Complex 5 is a binuclear dumbbell-like molecule, complex 6 is a rare example of discrete linear tetranuclear molecule, while complexes 7 and 8 are onedimensional chains formed by an alternate arrangement of bpy molecules and mononuclear subunits. The differences in complexes 5−8 are largely dependent on the structure of the mononuclear precusors of complexes 1−4. All eight complexes are assembled into higher dimensional supramolecular frameworks by diverse nonconvalent interactions including unusual anion···π interactions between perchlorate and five-membered benzimidazole rings. ■ INTRODUCTIONSmall metal−organic coordination molecular units with special structures are important in crystal engineering mainly in two facets: (i) they act as metallotectons to construct diverse frameworks via noncovalent contacts such as hydrogen bond, π···π interaction, CH···π interaction, cation···π interaction, and so on; 1−12 (ii) they act as a precursor to construct more complicated (higher dimensional or containing more nuclear) supramolecular assemblies via a substitution reaction taking on the labile coordination sites of the metallotectons, which can be seen as a stepwise bottom-up strategy. 13−21 Recently, coordination compounds based on this strategy are becoming interesting because the conditions for the assembly from structure-known subunits are more unambiguous than one-step synthesis, and thus it may lead to a more controllable system. 20 Obviously, the final assembly structures are largely dependent on the inherences of the precursors, whose structures may provide an important message for predicting the possible productions. Therefore, it is important to systematically illustrate the relationship between the precursors and the products.A stable mononuclear pincer-like complex can be constructed easily from tetradentate ligands with planar four-chelated coordination sites. When the equatorial plane of tetragonal pyramid or octahedral coordination sphere around the metal center is occupied by such tetradentate ligands, the resulting mononuclear complex will leave one or two labile coordination site(s) in the apex position which is suitable for substituti...

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Binding sites on the outside of metallo-supramolecular architectures; engineering coordination polymers from discrete architectures

Cited by 37 publications

References 69 publications

Aggregation of imine-based metallo-supramolecular architectures through π–π interactions

Aggregation of imine-based metallo-supramolecular architectures through π–π interactions

Dichlorido{N-[1-(pyrazin-2-yl)ethylidene-κN¹]ethane-1,2-diamine-κ²N,N′}zinc

Assembly of Binuclear, Tetranuclear, and Multinuclear Complexes from Pincer-Like Mononuclear Metallotectons: Structural Diversity Dependent on Precursors

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Binding sites on the outside of metallo-supramolecular architectures; engineering coordination polymers from discrete architectures

Cited by 37 publications

References 69 publications

Aggregation of imine-based metallo-supramolecular architectures through π–π interactions

Aggregation of imine-based metallo-supramolecular architectures through π–π interactions

Dichlorido{N-[1-(pyrazin-2-yl)ethylidene-κN1]ethane-1,2-diamine-κ2N,N′}zinc

Assembly of Binuclear, Tetranuclear, and Multinuclear Complexes from Pincer-Like Mononuclear Metallotectons: Structural Diversity Dependent on Precursors

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Dichlorido{N-[1-(pyrazin-2-yl)ethylidene-κN¹]ethane-1,2-diamine-κ²N,N′}zinc