The pyridyltetrazolate ligand formed in situ from NaN3 and 3-cyanopyridine the presence of ZnCl2 or CdCl2 water affords acentric (1) chiral (2) coordination polymers, respectively. corresponding reaction with 4-cyanopyridine gives 3 (not shown). Compounds 1–3 are second harmonic generation active.

Selective inclusion of (S)-2-butanol and (S)-2-methyl-1-butanol from their racemic mixtures in 98.2 98.4 % ee, respectively, is obtained with the robust 3D enantiopure hybrid organic–inorganic zeolite analogue [Cd(QA)2] (see scheme), which formed by self-assembly chiral quitenine (HQA) Cd(OH)2.

Butterfly magnet: The replacement of diamagnetic CoIII for CrIII in a 3d-4f butterfly complex results vastly improved single-molecule magnet properties. Longer relaxation times are found, with magnetic hysteresis observed. This is due to exchange interactions between the DyIII and ions, resulting multilevel barrier significantly reduced quantum tunneling magnetization. As service our authors readers, this journal provides supporting information supplied by authors. Such materials peer...

The crystal method: Single-crystal-to-single-crystal (SCSC) transformations of two 3D coordination polymers, {[Zn4(μ3-OH)2(5-sipa)2(1,4-bpeb)2]⋅4 H2O}n (see picture; C pale blue, N dark H green) and an analogous cadmium species, gave rise to corresponding linked polymers through photochemical [2+2] cycloaddition reactions. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available...

The three-dimensional crystalline porous metal-organic framework [Ni(2)(μ(2)-OH(2))(1,3-BDC)(2)(tpcb)](n) (1) [1,3-H(2)BDC = 1,3-benzenedicarboxylic acid; tpcb tetrakis(4-pyridyl)cyclobutane] was used to separate a solid mixture of naphthalene and anthracene at room temperature via selective adsorption naphthalene. process involved single-crystal-to-single-crystal transformation. guest molecules could be exchanged with ethanol, the host, 1, regenerated by removal ethanol molecules.

Coordination chemistry of natural polyphenols and transition metals allows rapid self-assembly conformal coatings on diverse substrates. Herein, we report that this coordination-driven process applies to simple phenolic molecules with monotopic or ditopic chelating sites (as opposed macromolecular, multitopic polyphenols), leading surface-confined amorphous films upon metal coordination. Films fabricated from gallic acid, pyrogallol, pyrocatechol, which are the major monomeric building...

Abstract Photoreactive olefinic species are incorporated into a metal–organic framework (MOF), [Zn(bdc)(3‐F‐spy)] ( 1 ). Single crystals of shown to undergo three types photomechanical macroscopic deformation upon illumination by UV light. To demonstrate the practical potential this system, inclusion in PVA (polyvinyl alcohol) composite membrane, exploiting hydrogen‐bonding interactions, is presented. Using amplification mechanical stress achieve actuation behavior demonstrated. These...

Framework integrity is retained when water molecules replace the nitromethane in coordination polymer [Ag(hat)ClO4 ]⋅2 CH3 NO2 (see picture for structure), which are arranged a helical fashion within chiral micropores of three-dimensional [Ag(hat)+ ]n network with (10,3)-a topology. Remarkably, this also case after subsequent displacement by molecules. hat=1,4,5,8,9,12-hexaazatriphenylene.

The shortest circuits in the three-dimensional network with (12,3) topology of solvated Ni(tpt)(NO3)2 pass through one another (see picture). This based upon interlinked double helices occupies a unique position set (n,3) nets. tpt=tri-4-pyridyl-1,3,5-triazine.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new type of infinite 3D polymeric network containing 4-connected, peripherally-linked metalloporphyrin building blocksBrendan F. Abrahams, Bernard Hoskins, and Richard RobsonCite this: J. Am. Chem. Soc. 1991, 113, 9, 3606–3607Publication Date (Print):April 1, 1991Publication History Published online1 May 2002Published inissue 1 April 1991https://pubs.acs.org/doi/10.1021/ja00009a065https://doi.org/10.1021/ja00009a065research-articleACS...

An unusual supramolecular compound {[WS4Cu4(4,4′-bpy)4][WS4Cu4I4(4,4′-bpy)2]}∞ (see picture) was obtained from the self-assembly of a preformed mixed-metal sulfide cluster, [NEt4]4[WS4Cu4I6]. The product consists four interpenetrating diamond-type nets (two cationic and two anionic) has large open channels that are lined with "receptor sites" for guest iodine molecules. 4,4′-bpy=4,4′-bipyridyl. Supporting information this article is available on WWW under...

Two independent and identical interpenetrating three-dimensional networks of a highly symmetrical type in which tpt ligands act as trigonal building blocks CuI ions tetrahedral 4-connecting units are contained cubic crystals the title compounds. Tpt appear centrosymmetrically related pairs within triazine rings make close ππ contacts.

The reaction of 4-cyanopyridine with NaN(3) in the presence H(2)O and a Lewis acid (CdCl(2)) affords novel 3D pillared-layered fluorescent phosphorescent coordination polymer Cd(3)(OH)(2)Cl(2)(4-PTZ)(2) (4-PTZ = 5-(4-pyridyl)tetrazolate) (1) while direct CdCl(2) H-PTZ gives simpler species Cd(4-PTZ)(2)(H(2)O)(2). solid-state structure nature 1 provide an indication type materials that may be formed as intermediates Sharpless-Demko for generation 5-substituted 1H-tetrazoles.

Abstract Regioselective photodimerization of trans ‐4‐styrylpyridine (4‐spy) derivatives is performed using pseudorotaxane‐like Zn‐based metal organic frameworks MOFs as templates. The formation rctt ‐HT (head‐to‐tail) dimers achieved by confining pairs coordinated 4‐spy derivative ligands within hexagonal windows and then irradiating them with UV light. It also possible to achieve a reaction where two different substituted are included in such MOF material. ether bond employed protect the...

A family of dinuclear cobalt complexes with bridging bis(dioxolene) ligands derived from 3,3,3′,3′-tetramethyl-1,1′-spirobis(indane-5,5′,6,6′-tetrol) (spiroH4) and ancillary based on tris(2-pyridylmethyl)amine (tpa) has been synthesized characterized. The ligand is redox-active accessible in the (spirocat–cat)4–, (spiroSQ–cat)3–, (spiroSQ–SQ)2– forms, (cat = catecholate, SQ semiquinonate). Variation (Mentpa; n 0–3) by successive methylation 6-position pyridine rings influences redox state...

Six tetranuclear 3d–4f single-molecule magnet (SMM) complexes formed using N-n-butyldiethanolamine and N-methyldiethanolamine in conjunction with ortho- para-substituted benzoic acid hexafluoroacetoacetone ligands yield two families, both having a butterfly metallic core. The first consists of four type {Co2IIIDy2III} {Co2IIICoIIDyIII} variation the carboxylate ligand. anisotropy barriers are 80 cm–1, (77 96 cm–1—two relaxation processes occur), 117 88 respectively, each following mechanism...

We report a unique vinyl coordination polymer (CP), [Zn(4-Fb)2 (tkpvb)]n (1, 4-HFb=4-fluorobenzoic acid, tkpvb=1,2,4,5-tetrakis(4-pyridylvinyl)benzene) that undergoes rare photopolymerization reaction to form two-dimensional CP integrated with one-dimensional linear organic polymer. Upon light irradiation at different wavelengths, 1 exhibits an unprecedented phenomenon of photoinduced nonlinear lattice expansion. can be uniformly dispersed in polyvinyl alcohol (PVA) the composite film 1-PVA....

Abstract Molecular crystals with the ability to transform light energy into macroscopic mechanical motions are a promising class of materials potential applications in actuating and photonic devices. In regard such materials, coordination polymers that exhibit dynamic photomechanical motion, associated phase transition, unknown. Herein, we report an intriguing photoactive, one‐dimensional Zn II polymer, 1 , derived from 1,3,5‐tri‐4‐pyridyl‐1,2‐ethenylbenzene 3,5‐difluorobenzoate. Single...

A chessboard pattern: Saccharic acid, which could become a cheap chiral feedstock for possible "green" heterogeneous catalysts and sieves of the future, gives robust crystalline zinc derivative, is unusual in having within same crystal structure two types channels with very different characteristics: one hydrophilic, other hydrophobic. These are isolated from each by seemingly impenetrable walls, produces, projection, pattern shown.

A novel 8-fold interpenetration diamondoid-like chiral condensed neutral coordination polymer, bis{4-[2-(4-pyridyl)ethenyl]benzoato}zinc [Zn(PEBA)2] 1, synthesized by the hydrothermal reaction between Zn(ClO4)2·6H2O and 4-[2-(4-pyridylethenyl)]benzenecarbonitrile (PEBC), displays very strong blue fluorescent emission SHG response (ca. 1.5 × that of urea) as well high thermal stability (up to ca. 430 °C).

Temperature determines the product: The reaction of triallyl-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione with CuBr at 60°C affords a copper(I)–olefin coordination polymer Cu4Br4 open cubane (left) as connecting node; when is repeated 90°C Cu6Br6 prismane unit formed in (right). Supporting information for this article available on WWW under http://www.wiley-vch.de/contents/jc_2002/2002/z18732_s.pdf or from author. Please note: publisher not responsible content functionality any supporting supplied...

A supramolecular cube has been formed by linking WS3Cu3 clusters with bidentate ligands. Eight clusters, which have an incomplete cubane-like structure, serve as the three connecting nodes of cube, while 12 bridging cyanide anions coordinated to copper centers lie along edges cube. chloride and four lithium cations are located inside