Coordination Networks ofC3vandC2vPhenylacetylene Nitriles and Silver(I) Salts:  Interplay of Ligand Symmetry and Molecular Dipole Moments in the Solid State

Choe, Wonyoung; Kiang, Y.‐H.; Xu, Zhengtao; Lee, Stephen

doi:10.1021/cm981153c

Cited by 48 publications

(36 citation statements)

References 13 publications

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“…Both contain three-connected nodes and although such nodes are relatively common within two-dimensional coordination polymers they normally form structures that contain six-membered rings (27)(28)(29)(30)(31)(32)(33). In particular, honeycomb sheet arrangements are formed by trigonal planar nodes (28)(29)(30)(31), and T-shaped nodes form a range of structural types, including brick-wall (27) and herringbone motifs (30,31), based on ''compressed'' honeycomb arrangements. All of these more common types adopt a 6 3 topology, as seen in 4, and larger rings are rarely observed within twodimensional networks.…”

Section: Comparison Of Structuresmentioning

confidence: 99%

Using multimodal ligands to influence network topology in silver(I) coordination polymers

Oxtoby

Blake

Champness

et al. 2002

Proc. Natl. Acad. Sci. U.S.A.

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A range of Ag(I) one-and two-dimensional coordination frameworks has been prepared and structurally characterized by using the multimodal ligand 3,6-di-pyrazin-2-yl-(1,2,4,5)-tetrazine, which offers both monodentate and chelating binding sites. It is demonstrated that multimodal ligands can be used to prepare coordination frameworks with novel and unusual topologies and to influence the precise geometrical arrangement of both ligands and metal centers within such supramolecular arrays.crystal engineering ͉ supramolecular chemistry ͉ tetrazine T he synthesis of coordination frameworks represents an extremely topical area of research (1-3) that has developed dramatically over recent years with many advances in understanding the control of framework structure and topology. For example, the degree of interpenetration (4), polymeric dimensionality (5), and framework connectivity (6) can be controlled by the design of the constituent building blocks or crystallization conditions. We (7,8), among others (9-13), have been developing a strategy that uses multimodal bridging ligands that differ from more traditional tri-and tetradentate bridging systems in that they offer chemically distinct binding sites, both chelating and monodentate (Scheme 1). By using such ligands for coordination polymer construction, we aim to introduce further control over network formation by controlling the precise arrangement of metal centers with respect to each other and have recently reported examples of chiral Ag(I) coordination frameworks with diamondoid topology by using 2,2Ј-bipyrazine as the multimodal bridging ligand (7,8). We are also interested in the assembly of discrete supramolecular entities, metallacycles, or oligomeric supramolecular arrays into infinite coordination arrays (13). Our recent studies combining coordinatively flexible Cd(II) metal centers with the angular ligand 2,4Ј-(1,4-phenylene)bispyridine indicate that centrosymmetric metallacyclic units can be readily prepared by using simple ligand design (13). The latter study (13) also demonstrated that the metallacyclic units could be arranged into coordination frameworks by means of bridging of coordinated NO 3 Ϫ anions (13). We are now extending this work to use ligands that simultaneously encourage the formation of metallacyclic units and also intermetallacycle bridging.We have targeted 3,6-di-pyrazin-2-yl-(1,2,4,5)-tetrazine (dpztz), which has the potential to control the relative displacement of up to four coordinated metal centers in a zigzag fashion (Scheme 2). Although bis-2-pyridyl substituted 1,2,4,5-tetrazine units in principle allow coordination of two metal centers in cis-bidentate sites, in practice this coordination mode has never been observed and the trans-arrangement is always adopted (14-16). Dpztz also has the potential to form metallacyclic units with a suitably flexible transition metal, such as Ag(I), using both chelating and monodentate donors (Scheme 2e). It is our experience that Ag(I) exhibits a marked tendency to adopt both chelating and mono...

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Section: Comparison Of Structuresmentioning

confidence: 99%

Using multimodal ligands to influence network topology in silver(I) coordination polymers

Oxtoby

Blake

Champness

et al. 2002

Proc. Natl. Acad. Sci. U.S.A.

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“…Illustrative examples, taken from solved singlecrystal X-ray data, are given in Figure 3. [12,16] Figure 3c is for the organic molecule shown in Figure 2 with seven aromatic rings and three acetylene bridges while Figure 3d is for the molecule shown in Figure 2d with four aromatic rings, three acetylene bridges and six ethylene oxide side chains.…”

Section: Hexagonal-porous Solids From Phenylacetylene Nitrilesmentioning

confidence: 99%

Persistent Honeycomb Structures in Porous and Other Two-Component Solids

Kiang

Lee

et al. 2000

Adv. Mater.

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Predicting three‐dimensional structure based on the individual components of hybrid structures remains one of the greatest challenges of crystal engineering; however, progress is reported here: For 21 different systems the crystallization of phenylacetylene nitriles with silver triflate salts leads to the same basic hexagonal honeycomb structures (see Figure). A rationalization based on interface minimization is proposed.

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“…21 Therefore, energy transfer can be affected by doping, since this varies the interaction between particles or ions. [26][27][28] Therefore, energy transfer between Eu 3+ and a dopant might be realized if the local symmetry of Eu 3+ is reduced. It possesses a cubic bixbyite structure (space group Ia3) and two distinct crystallographic sites available for rare earth ion substitution.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence and room temperature activity of Y₂O₃:(Eu³⁺,Au³⁺)/palygorskite nanocomposite

Yang

2015

Dalton Trans.

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The fluorescence and room temperature activity of a palygorskite supported Y2O3:(Eu(3+),Au(3+)) nanocomposite were investigated to design a fluorescence-indicated catalyst. The effects of Au(3+) doping on the structure and surface properties of the host material were systematically characterized. The fluorescence intensity of Y2O3:Eu(3+) was affected by Au(3+) doping, which was related to the crystallinity of Y2O3. Excess Au(3+) ions were segregated to the host surface and reduced to metallic Au. The local symmetry of Eu(3+) was reduced by Au(3+) doping, which benefited the energy transfer between Eu(3+) and Au(3+). Energy absorbed by Eu(3+) was transferred from Au(3+) to metallic Au, where electrons were produced. These electrons were absorbed by O2 to change into O2(-), which acted as the oxidant for ortho-dichlorobenzene (o-DCB). The variation of fluorescence intensity during the catalytic reaction was observed. The room temperature catalytic activity of the nanocomposite under UV irradiation was revealed. The as-synthesized nanocomposite might have potential applications in environmental fields.

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Coordination Networks ofC₃_vandC₂_vPhenylacetylene Nitriles and Silver(I) Salts: Interplay of Ligand Symmetry and Molecular Dipole Moments in the Solid State

Cited by 48 publications

References 13 publications

Using multimodal ligands to influence network topology in silver(I) coordination polymers

Using multimodal ligands to influence network topology in silver(I) coordination polymers

Persistent Honeycomb Structures in Porous and Other Two-Component Solids

Fluorescence and room temperature activity of Y₂O₃:(Eu³⁺,Au³⁺)/palygorskite nanocomposite

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Coordination Networks ofC3vandC2vPhenylacetylene Nitriles and Silver(I) Salts: Interplay of Ligand Symmetry and Molecular Dipole Moments in the Solid State

Cited by 48 publications

References 13 publications

Using multimodal ligands to influence network topology in silver(I) coordination polymers

Using multimodal ligands to influence network topology in silver(I) coordination polymers

Persistent Honeycomb Structures in Porous and Other Two-Component Solids

Fluorescence and room temperature activity of Y2O3:(Eu3+,Au3+)/palygorskite nanocomposite

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Product

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Coordination Networks ofC₃_vandC₂_vPhenylacetylene Nitriles and Silver(I) Salts: Interplay of Ligand Symmetry and Molecular Dipole Moments in the Solid State

Fluorescence and room temperature activity of Y₂O₃:(Eu³⁺,Au³⁺)/palygorskite nanocomposite