ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTApplication of Carbon Nanotubes as Supports in Heterogeneous CatalysisJ. M. Planeix, N. Coustel, B. Coq, V. Brotons, P. S. Kumbhar, R. Dutartre, Geneste, Bernier, and AjayanCite this: J. Am. Chem. Soc. 1994, 116, 17, 7935–7936Publication Date (Print):August 1, 1994Publication History Published online1 May 2002Published inissue 1 August 1994https://pubs.acs.org/doi/10.1021/ja00096a076https://doi.org/10.1021/ja00096a076research-articleACS...

The self-assembly between a bis-monodentate tecton based on two pyridine units connected to an enantiomerically pure isomannide stereoisomer and HgCl2 leads the formation of triple stranded helical infinite coordination network which was structurally characterised by X-ray diffraction single crystal.

Exo-ligands based on functionalisation of diazacyclic cores variable size by two pyridines has been achieved; under self-assembly conditions, their ability to form metallamacrocycles in the presence PdII or AgII was demonstrated X-ray crystallography.

Neutral hybrid 2-D networks have been generated using a bis-amidinium capable of chelating M(CN)6(3-) anions via hydrogen bonds: the packing achiral leads to channels which are occupied by water molecules forming polymeric H-bonded chains; furthermore, owing dihapto mode H-bonding, presence supramolecular chirality delta' and lambda' types taking place within second coordination sphere metallic centre has demonstrated.

Four novel polymeric coordination networks have been obtained through self-assembly processes involving alkoxo-bridged copperII species as nodes, and anionic cyano-complexes linkers: infinity2[{Cu2(pa)2}{M(CN)2}2](M=Ag, 1; Au, 2), (infinity)3[{Cu4(mea)4}{Au(CN)2}4.H2O]3, (infinity)3[{Cu2(pa)2}{Ni(CN)4}](pa = deprotonated propanolamine; mea monoethanolamine). The supramolecular architectures of compounds 1, 2 are sustained by argentophilic or strong aurophilic interactions. solid-state 1 2,...

The role played by different anions (XF6− (X = P, As, Sb), BF4−) on the connectivity of coordination networks formed a combination silver salts and an organic tecton based piperazine bearing two pyridine units has been studied in crystalline phase X-ray diffraction single crystal. All four weakly coordinating lead to formation analogous 2-D networks. For isostructural XF6− Sb) crystals are isomorphous.

Using the bis-amidinium dication 1 bearing four acidic protons disposed in a divergent fashion and capable of chelating, through H-bonds, metal cyanide anions, neutral 1- 2-D hybrid networks were generated. Whereas presence M(CN)42− (M = Ni(II), Pd(II) Pt(II)), 1-D H-bonded are formed double dihapto mode H-bonding between dianion, case M(CN)64− Fe(II) Ru(II)), based on interconnection by analogous to those [M(CN)4]2− mentioned above obtained. Interestingly, [M(CN)6]3− Cr(III)), again network...

The combination of two organic tectons 1 and 2, based on a 1,4-phenylenediamine backbone functionalised with pyridine units through amide junctions HgCl2, leads to the formation types 2-D networks, one purely metallo-organic type, only coordination bonds, other combining both hydrogen bonds.

Using bis-amidinium dications as tetra H-bond donor tectons and Au(CN)2− anion, neutral 1-D networks based on a bis monohapto mode of H-bonding are obtained. Owing to the short metal–metal distance within network, luminescent crystals The emission phenomena may be tuned by nature spacer connecting two cyclic amidinium groups.

Based on the coordination ability of ClO4−, BF4− and Cl− anions, a switch from discrete octahedral Co(II) complexes to directional 1-D network was demonstrated using organic tectons based pyridine unit as monodentate site terpyridine moiety tridentate pole; whereas with non-coordinating anions mononuclear were obtained, for anion obtained in presence CoCl2 under self-assembly conditions; X-ray study single crystal revealed centrosymmetric packing networks.

Ligands based on oligoethylene glycol units bearing at their extremities benzonitrile groups behave in the crystalline phase as tectons and lead presence of silver cation to different coordination networks. Depending number units, 1-D stair type or interdigitated 2-D interwoven architectures composed helical strands are obtained.

Upon combining the dicationic bis-amidinium tecton 2 bearing four propyl chains with tetra- and hexa-cyanometallate anions neutral 1- 2-D hybrid networks were obtained. In case of [M(CN)4]2− (M = Ni(II), Pd(II) Pt(II)), control spacing between consecutive 1-D H-bonded by presence was demonstrated. For [M(CN)6]3− Fe(III), Co(III), Cr(III)), presenting hexagonal channels have been marked contrast based on use 1 for which are filled water molecules, in 2, as expected, solvent molecules replaced chains.

With the aim of combining luminescence and chirality in heterometallic Ir(III)-Cd(II) coordination networks, synthetic strategies for formation new Ir(III)-based chiral metallatectons ([Ir(dFppy)2(1)][PF6]), both as a racemic mixture Δ Λ enantiomers (rac-[Ir(dFppy)2(1)][PF6]) enantiopure complexes (Δ-[Ir(dFppy)2(1)][PF6] Λ-[Ir(dFppy)2(1)][PF6]), were developed. The final compounds characterized solution crystalline phase. Notably, their crystal structures determined by single X-ray...

The combination of three isomeric organic tectons 1–3 based on 1,2-, 1,3- and 1,4-phenylenediamine backbones bearing two isonicotinoyl groups with a Cu(OAc)2 neutral complex leads to the formation 1-D 2-D coordination networks. Whereas for both 1 2 network is generated through interconnection moieties by copper dimers paddle-wheel type, in case 3, formed another type connector, binuclear which metal centres adopt an octahedral geometry.

The combination of ligands based on two quinoline units acting as primary coordinating sites connected by tetra- or penta-ethyleneoxy fragments behaving secondary interaction leads spontaneously in a one-pot reaction to the formation tri- and terta-nuclear metalla-organic knots presence silver cation.

The combination of flexible neutral organic tectons based on two pyridines interconnected by a thioether or thioester type spacer with an inorganic ZnSiF(6) pillar leads to the formation 2-D coordination networks and packing latter generates crystals offering controllable tubular channels imposed orientation along axis.

The combination of the chiral tecton based on (R)-6,6'-dibromo-1,1'-binaphthyl moiety bearing two isonicotinoyl groups with AgX (X = BF4-, CF3SO3-, PF6-) leads to formation enantiomerically pure helical strands orthogonal packing in rare space group I2(1)3.

The co-crystallisation of [Fe(CN)5NO]2- and cyclic achiral 1(2+) chiral 2(2+) or 3(2+) bisamidinium tectons leads in the crystalline phase to formation 1-D H-bonded molecular networks respectively. In all cases, network is formed by mutual bridging anionic cationic units through a chelate mode H-bonding.

Abstract In the presence of MX 2 salts, ligand 1 (in a M/L ratio 2:2, M = Zn, Hg, Co, X Cl or I), based on ethylene glycol fragment bearing two pyridine units as monodentate coordination sites, leads to isostructural square‐shaped neutral metallamacrocycles demonstrated by X‐ray diffraction single crystals. For all dinuclear complexes generated, dicationic metal centre adopts distorted tetrahedral geometry and its sphere is composed N set coordinating atoms. complexes, parallel packing...