pH-Controlled Assembly of Two Unusual Entangled Motifs Based on a Tridentate Ligand and Octamolybdate Clusters: 1D + 1D → 3D Poly-Pseudorotaxane and 2D → 2D → 3D Polycatenation

Two unusual entangled motifs of [Ag0.52Na0.48(β-Mo8O26)­(H2O)]­[Ag3(Tipa)2] (1) and [Ag6(Tipa)4(β-Mo8O26)]­[H2(β-Mo8O26)]·5H2O (2) based on a tri­(4-imidazolylphenyl)­amine (Tipa) ligand and octamolybdate clusters have been successfully synthesized at different pH values. In compound 1, the 1D inorganic chains and 1D ladders are entangled to give a highly novel 1Dladder +1Dchain → 3D poly-pseudorotaxane framework. The unusual topological feature of 2 consists of the 2-fold interpenetrated layer, which is further catenated to the two adjacent such sheets in parallel fashion to give an overall unique (2D → 3D) polycatenated framework. The luminescent properties of the compounds have also been investigated

Syntheses and Characterization of Six Coordination Polymers of Zinc(II) and Cobalt(II) with 1,3,5-Benzenetricarboxylate Anion and Bis(imidazole) Ligands

Six new coordination polymers, namely [Zn1.5(BTC)(L1)(H2O)2]·1.5H2O (1), [Zn3(BTC)2(L2)3] (2), [Zn3(BTC)2(L3)1.5(H2O)]·H2O (3), [Co6(BTC)4(L1)6(H2O)3]·9H2O (4), [Co1.5(BTC)(L2)1.5]·0.25H2O (5), and [Co4(BTC)2(L3)2(OH)2(H2O)]·4.5H2O (6), where L1 = 1,2-bis(imidazol-1-ylmethyl)benzene, L2 = 1,3-bis(imidazol-1-ylmethyl)benzene, L3 = 1,1‘-(1,4-butanediyl)bis(imidazole), and BTC = 1,3,5-benzenetricarboxylate anion, were synthesized under hydrothermal conditions. In 1−6, each of L1−L3 serves as a bidentate bridging ligand. In 1, BTC anions act as tridentate ligands, and compound 1 shows a 2D polymeric structure which consists of 2-fold interpenetrating (6, 3) networks. In compound 2, BTC anions coordinate to zinc cations as tridentate ligands to form a net with (64·82)2(86)(62·8)2 topology. In compound 3, BTC anions act as tetradentate ligands and coordinate to zinc cations to form a net with (4·62·83)2(8·102)(4·6·83·10)2 topology. In compound 5, each BTC anion coordinates to three Co cations, and the framework of 5 can be simplified as (64·82)2(62·82·102)(63)2 topology. For 4 and 6, the 2D cobalt−BTC layers are linked by bis(imidazole) ligands to form 3D frameworks. In 6, the Co centers are connected by μ3-OH and carboxylate O atoms to form two kinds of cobalt−oxygen clusters. Thermogravimetric analyses (TGA) for these compounds are discussed. The luminescent properties for 1−3 and magnetic properties for 4−6 are also discussed in detail

Syntheses and Characterization of Six Coordination Polymers of Zinc(II) and Cobalt(II) with 1,3,5-Benzenetricarboxylate Anion and Bis(imidazole) Ligands

Six new coordination polymers, namely [Zn1.5(BTC)(L1)(H2O)2]·1.5H2O (1), [Zn3(BTC)2(L2)3] (2), [Zn3(BTC)2(L3)1.5(H2O)]·H2O (3), [Co6(BTC)4(L1)6(H2O)3]·9H2O (4), [Co1.5(BTC)(L2)1.5]·0.25H2O (5), and [Co4(BTC)2(L3)2(OH)2(H2O)]·4.5H2O (6), where L1 = 1,2-bis(imidazol-1-ylmethyl)benzene, L2 = 1,3-bis(imidazol-1-ylmethyl)benzene, L3 = 1,1‘-(1,4-butanediyl)bis(imidazole), and BTC = 1,3,5-benzenetricarboxylate anion, were synthesized under hydrothermal conditions. In 1−6, each of L1−L3 serves as a bidentate bridging ligand. In 1, BTC anions act as tridentate ligands, and compound 1 shows a 2D polymeric structure which consists of 2-fold interpenetrating (6, 3) networks. In compound 2, BTC anions coordinate to zinc cations as tridentate ligands to form a net with (64·82)2(86)(62·8)2 topology. In compound 3, BTC anions act as tetradentate ligands and coordinate to zinc cations to form a net with (4·62·83)2(8·102)(4·6·83·10)2 topology. In compound 5, each BTC anion coordinates to three Co cations, and the framework of 5 can be simplified as (64·82)2(62·82·102)(63)2 topology. For 4 and 6, the 2D cobalt−BTC layers are linked by bis(imidazole) ligands to form 3D frameworks. In 6, the Co centers are connected by μ3-OH and carboxylate O atoms to form two kinds of cobalt−oxygen clusters. Thermogravimetric analyses (TGA) for these compounds are discussed. The luminescent properties for 1−3 and magnetic properties for 4−6 are also discussed in detail

pH-Controlled Assembly of Two Unusual Entangled Motifs Based on a Tridentate Ligand and Octamolybdate Clusters: 1D + 1D → 3D Poly-Pseudorotaxane and 2D → 2D → 3D Polycatenation

Two unusual entangled motifs of [Ag_0.52Na_0.48(β-Mo₈O₂₆)­(H₂O)]­[Ag₃(Tipa)₂] (<b>1</b>) and [Ag₆(Tipa)₄(β-Mo₈O₂₆)]­[H₂(β-Mo₈O₂₆)]·5H₂O (<b>2</b>) based on a tri­(4-imidazolylphenyl)­amine (Tipa) ligand and octamolybdate clusters have been successfully synthesized at different pH values. In compound <b>1</b>, the 1D inorganic chains and 1D ladders are entangled to give a highly novel 1D_ladder +1D_chain → 3D poly-pseudorotaxane framework. The unusual topological feature of <b>2</b> consists of the 2-fold interpenetrated layer, which is further catenated to the two adjacent such sheets in parallel fashion to give an overall unique (2D → 3D) polycatenated framework. The luminescent properties of the compounds have also been investigated

Two Unusual 3D Copper(II) Coordination Polymers Constructed by p-Sulfonated Calixarenes and Bis(triazolyl) Ligands

Two novel Cu(II) compounds [Cu2(btb)3.5(C4AS)(H2O)]·2.5(H2O) (1) and [Cu2.5(btp)2(C4AS)(htz)(H2O)3]·4.75(H2O) (2) have been hydrothermally synthesized and structurally determined by single-crystal X-ray diffraction analyses (btb = 1,4-bis(1,2,4-triazol-1-yl)butane, btp = 1,5-bis(1,3,4-triazol-1-yl)pentane, htz = 1,3,4-triazolate, and C4AS = p-sulfonato-calix[4]arene). In 1, the btb ligands connect Cu(II) atoms to form a 3D porous framework. The 1D chains constructed by C4AS and Cu(II) atoms are further bonded to the 3D porous framework through the Cu–O bonds. Topologically, structure 1 belongs to a 3D (3,6)-connected net with the Schläfli symbol of (42·6)(46·68·8). In 2, the C4AS links the Cu(II) atoms to form 1D chains, which are further connected by the btp and htz to generate a 3D (3,4,6)-connected framework with the Schläfli symbol of (62·8)(52·62·7·8)(54·62·7·87·9). The two compounds have been further characterized by infrared spectra (IR), elemental analyses, powder X-ray diffraction (PXRD), thermogravimetric (TG) analyses, and UV–vis absorption spectra

Species Plantarum

Series of inorganic–organic hybrid materials based on octamolybdates, silver ions, and multidentate N-donor ligands, namely, [Ag₂(2,3′-tmbpt)­(β-Mo₈O₂₆)_0.5] (<b>1</b>), [Ag₂(2,4′-tmbpt)₂(α-Mo₈O₂₆)_0.5(H₂O)_0.5]·2H₂O (<b>2</b>), [Ag₃(3,3′-tmbpt)₂(α-H₂Mo₈O₂₆)_0.5(β-Mo₈O₂₆)_0.5]·3.5H₂O (<b>3</b>), [Ag₂(3,3′-tmbpt)­(ε-Mo₈O₂₆)_0.5]·1.75H₂O (<b>4</b>), [Ag₂(3,4′-tmbpt)₂(β-Mo₈O₂₆)_0.5]·0.5H₂O (<b>5</b>), and [Ag­(3,4′-Htmbpt)­(β-Mo₈O₂₆)_0.5] (<b>6</b>), where 2,3′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)­methyl)-3-(3-pyridyl)-5-(2-pyridyl)-1,2,4-triazole), 2,4′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)­methyl)-3-(4-pyridyl)-5-(2-pyridyl)-1,2,4-triazole), 3,3′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)­methyl)-3,5-bis­(3-pyridyl)-1,2,4-triazole, and 3,4′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)­methyl)-3-(4-pyridyl)-5-(3-pyridyl)-1,2,4-triazole) have been synthesized under hydrothermal conditions. Compound <b>1</b> displays a rare 3D (3,4,8)-connected net with (4·8²)­(4²·8⁴)­(4³·8²⁰·10⁵) topology. Compound <b>2</b> shows a rare 3D (4,6)-connected self-catenated framework with (6⁴·8²)­(4²·6³·8²)­(4²·6⁸·8⁴·10) topology. Compound <b>3</b> is a scarce 3D framework based on two different kinds of [Mo₈O₂₆]^4– isomers. Compound <b>4</b> exhibits a 3D framework constructed by silver–organic sheets and the rare [ε-Mo₈O₂₆]^4– anions. Compound <b>5</b> shows an interesting 1D → 2D polythreaded structure. Compound <b>6</b> displays a 2D layer structure, which is further linked by the N–H···O hydrogen bonds to form a 3D supramolecular architecture. Their structures have been further characterized by infrared spectra (IR), elemental analyses, powder X-ray diffraction (PXRD), electrochemistry and photoluminesce. Moreover, the photocatalytic activities for degradation of organic pollutant have been investigated for compounds <b>3</b>–<b>6</b>

Fluorescent Aromatic Tag-Functionalized MOFs for Highly Selective Sensing of Metal Ions and Small Organic Molecules

By varying the fluorescent tags of resorcin[4]­arene-based tetracarboxylic acids from phenyl to naphthyl, two highly luminescent metal–organic frameworks (MOFs), namely, [Zn2(TPC4A)­(DMF)­(H2O)4]·3H2O (1) and [(CH3)2NH2]2­[Zn­(TNC4A)]·4H2O (2), were successfully achieved (TPC4A = 2,8,14,20-tetra-phenyl-6,12,18,24-tetra-methoxy-4,10,16,22-tetra-carboxy-methoxy-resorcin[4]­arene and TNC4A = 2,8,14,20-tetra-1-naphthal-6,12,18,24-tetra- methoxy-4,10,16,22-tetra-carboxy-methoxy-resorcin[4]­arene). Compound 1 features a unique 2D network, while 2 exhibits a fascinating 3D framework. The highly selective detection of small organic molecules as well as Fe2+ and Fe3+ was performed for 1 and 2 as fluorescent sensors. Remarkably, luminescent 1 and 2 were used as sensory materials for the sensing of various amine vapors with high selectivity and rapid response. Most strikingly, clear fluorescence “on–off” switch-functions toward small organic molecules as well as amine vapors were also explored for luminescent 1 and 2

Syntheses and Characterization of Six Coordination Polymers of Zinc(II) and Cobalt(II) with 1,3,5-Benzenetricarboxylate Anion and Bis(imidazole) Ligands

Six new coordination polymers, namely [Zn1.5(BTC)(L1)(H2O)2]·1.5H2O (1), [Zn3(BTC)2(L2)3] (2), [Zn3(BTC)2(L3)1.5(H2O)]·H2O (3), [Co6(BTC)4(L1)6(H2O)3]·9H2O (4), [Co1.5(BTC)(L2)1.5]·0.25H2O (5), and [Co4(BTC)2(L3)2(OH)2(H2O)]·4.5H2O (6), where L1 = 1,2-bis(imidazol-1-ylmethyl)benzene, L2 = 1,3-bis(imidazol-1-ylmethyl)benzene, L3 = 1,1‘-(1,4-butanediyl)bis(imidazole), and BTC = 1,3,5-benzenetricarboxylate anion, were synthesized under hydrothermal conditions. In 1−6, each of L1−L3 serves as a bidentate bridging ligand. In 1, BTC anions act as tridentate ligands, and compound 1 shows a 2D polymeric structure which consists of 2-fold interpenetrating (6, 3) networks. In compound 2, BTC anions coordinate to zinc cations as tridentate ligands to form a net with (64·82)2(86)(62·8)2 topology. In compound 3, BTC anions act as tetradentate ligands and coordinate to zinc cations to form a net with (4·62·83)2(8·102)(4·6·83·10)2 topology. In compound 5, each BTC anion coordinates to three Co cations, and the framework of 5 can be simplified as (64·82)2(62·82·102)(63)2 topology. For 4 and 6, the 2D cobalt−BTC layers are linked by bis(imidazole) ligands to form 3D frameworks. In 6, the Co centers are connected by μ3-OH and carboxylate O atoms to form two kinds of cobalt−oxygen clusters. Thermogravimetric analyses (TGA) for these compounds are discussed. The luminescent properties for 1−3 and magnetic properties for 4−6 are also discussed in detail

A Series of Coordination Polymers Constructed by Flexible 4‑Substituted Bis(1,2,4-triazole) Ligands and Polycarboxylate Anions: Syntheses, Structures, and Photoluminescent Properties

Eleven Zn/Cd-containing coordination polymers (CPs) incorporating both flexible 4-substituted bis­(1,2,4-triazole) ligands and polycarboxylate anions, namely, [Zn­(L1)­(<i>o</i>-BDC)]·1.5H₂O (<b>1</b>), [Zn­(L1)­(<i>m</i>-BDC)] (<b>2</b>), [Cd₂(L1)­(BTEC)]·H₂O (<b>3</b>), [Zn­(L2)­(<i>m</i>-BDC)]·1.25H₂O (<b>4</b>), [Zn­(L2)­(<i>p</i>-BDC)]·4H₂O (<b>5</b>), [Cd­(L2)­(<i>p</i>-BDC)]·H₂O (<b>6</b>), [Zn₂(L2)­(BTEC)] (<b>7</b>), [Zn­(L3)­(<i>m</i>-BDC)]·3.5H₂O (<b>8</b>), [Zn₂(L3)­(<i>p</i>-BDC)₂]·2H₂O (<b>9</b>), [Zn₂(L3)₂(BTEC)]·2H₂O (<b>10</b>), and [Cd₂(L3)₂(BTEC)] (<b>11</b>) {L1 = 1,2-bis­[2-(4H-1,2,4-triazol-4-yl)­phenoxy]­ethane, L2 = 1,2-bis­[3-(4H-1,2,4-triazol-4-yl)­phenoxy]­ethane, L3 = 1,2-bis­[4-(4H-1,2,4-triazol-4-yl)­phenoxy]­ethane, <i>o</i>-H₂BDC = phthalic acid, <i>m</i>-H₂BDC = isophthalic acid, <i>p</i>-H₂BDC = terephthalic acid, and H₄BTEC = pyromellitic acid} have been prepared and identified by physical measurements. Compound <b>1</b> possesses a layered structure. Compound <b>2</b> shows one-dimensional chains. Weak π–π intermolecular stackings further join these chains into a two-dimensional (2D) supramolecular layered structure. Compound <b>3</b> displays a three-dimensional (3D) (4,8)-connected (3²·4²·5²)­(3⁴·4⁸·5¹²·6⁴) net. Compound <b>4</b> consists of two interlocked single-wall metal–organic nanotubes (SWMONTs) with both polyrotaxane and polycatenane characters. Compound <b>5</b> exhibits a 3D 5-fold interpenetrating diamond motif. Compound <b>6</b> furnishes a 3D α-Po net. Compound <b>7</b> reveals a 3D (4,6)-connected net with (4³·6³)­(4⁶·6⁶·8³) topology. Compound <b>8</b> features a 2D 4-connected network with (6⁵·8) topology. Compound <b>9</b> shows a 3D 3-fold interpenetrating α-Po net. Compounds <b>10</b> and <b>11</b> display 3D (4,4)-connected nets with the same (6⁴·7·8)­(6²·8⁴) topology. The effects of the bis­(triazole) ligands, aromatic polycarboxylate anions, and metals ions on the framework assemblies have been discussed. Solid-state luminescent of compounds <b>1</b>–<b>11</b> are reported as well. Moreover, fluorescent properties of compounds <b>4</b>–<b>7</b> in various solvent suspensions were investigated at room temperature

Two Unusual 3D Copper(II) Coordination Polymers Constructed by p-Sulfonated Calixarenes and Bis(triazolyl) Ligands

Two novel Cu(II) compounds [Cu2(btb)3.5(C4AS)(H2O)]·2.5(H2O) (1) and [Cu2.5(btp)2(C4AS)(htz)(H2O)3]·4.75(H2O) (2) have been hydrothermally synthesized and structurally determined by single-crystal X-ray diffraction analyses (btb = 1,4-bis(1,2,4-triazol-1-yl)butane, btp = 1,5-bis(1,3,4-triazol-1-yl)pentane, htz = 1,3,4-triazolate, and C4AS = p-sulfonato-calix[4]arene). In 1, the btb ligands connect Cu(II) atoms to form a 3D porous framework. The 1D chains constructed by C4AS and Cu(II) atoms are further bonded to the 3D porous framework through the Cu–O bonds. Topologically, structure 1 belongs to a 3D (3,6)-connected net with the Schläfli symbol of (42·6)(46·68·8). In 2, the C4AS links the Cu(II) atoms to form 1D chains, which are further connected by the btp and htz to generate a 3D (3,4,6)-connected framework with the Schläfli symbol of (62·8)(52·62·7·8)(54·62·7·87·9). The two compounds have been further characterized by infrared spectra (IR), elemental analyses, powder X-ray diffraction (PXRD), thermogravimetric (TG) analyses, and UV–vis absorption spectra