Two new <italic>rht</italic>-type anionic MOFs revealed a rapid and selective adsorption of cationic dyes desorption in saturated NaCl aqueous solution.

We presented an effective and universal strategy for the improvement of luminophore's solid-state emission, i.e., macrocyclization-induced emission enhancement (MIEE), by linking luminophores through C(sp3) bridges to give a macrocycle. Benzothiadiazole-based macrocycle (BT-LC) has been synthesized one-step condensation monomer 4,7-bis(2,4-dimethoxyphenyl)-2,1,3-benzothiadiazole (BT-M) with paraformaldehyde, catalyzed Lewis acid. In comparison monomer, BT-LC produces much more intense...

Step by step: Pentanuclear clusters (see picture) are synthesized as building units for the construction of three-dimensional, diamondlike networks. The ESI mass spectra these reveal that pentanuclear maintain their structural integrity before condensing into frameworks, thereby allowing a successful step-by-step assembly. Supporting information this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z800403_s.pdf or from author. Please note: publisher not...

Viologen cations are excellent electro- and photochromic materials. They generally have no response or very low sensitivity to bases. In this paper, three compounds, 1,1′-bis(2-oxo-2-phenylethyl)-4,4′-bipyridinium (viologen) with different substituents, including H (1), Cl (2), OH (3), were synthesized. All three, especially 1 2, high base in both solution solid state air atmosphere. These viologens responsive not only bases but also solvent polarity. NMR shows became enolic then a radical,...

Three porous Cu(II) coordination polymers {[(CH3)2NH2]3[Cu7K(μ7-L1)2(μ7-L1)2(μ2-OH)2(H2O)6]·18H2O}3n (1), {[Cu5(μ8-L1)2(μ3-OH)2(H2O)5]·4.5DMF·18H2O}3n (2), {[Cu5(μ8-L2)2(μ3-OH)2(H2O)4]·DMF·10.5H2O}3n (3), where KH3L1 and H4L2 are semirigid 3-(3′,5′-dicarboxylphenoxy) phthalic acid 4-(3′,5′-dicarboxylphenoxy) acid, respectively, were synthesized solvothermally. Their guest-accessible voids 36%, 59%, 39% in 1, 2, 3, respectively. These three show high catalytic activities for the degradation...

Abstract Viologen, as a type of strong electron acceptor, is prone to undergo transfer (ET) and change color under external stimuli. However, due the easy aggregation viologen molecules, they usually suffer from poor fluorescence emission in condensed phase. Herein, new derivative VioCl 2 ·2Cl ( 1 2+ ·2Cl) was designed synthesized, which enhanced by introducing Me‐β‐CD weaken interactions between molecules. Then viologen‐based host–guest supramolecule @Me‐β‐CD obtained electrostatic...

An anionic sod-type zeolitic metal-organic framework [(CH3)2NH2]9{Tb6(η6-TATAT)4(H2O)12}·3Cl·DMA·7H2O [1, H6TATAT = 5,5',5''-(1,3,5-triazine-2,4,6-triyltriimino)tri-1,3-benzenedicarboxylic acid] has been synthesized by metal-ligand directed assembly of hexacarboxylic acid units and Tb3+ ions. Compound 1 with extra-large cavities can efficiently extract natural product anthocyanins from blackberries release them rapidly into NaCl aqueous solution. And, the nature makes it very sensitive to...

As one of the most important environmental parameters, humidity always affects people's life. It is still a challenge in attaining precise sensors with rapid and convenient method. Herein, cobalt-based bimetallic zeolitic imidazolate frameworks (ZIFs) nanomaterials were obtained by facile solution precipitation method applied for quartz crystal microbalance (QCM) to measure relative (RH) at room temperature. The characterization sensing results show that ZIF-67 ZIF-CoX (X = Ni, Cu, Zn)...

In this work, a facile synthesis method was adopted to synthesize MOF-14 with mesoporous structure. The physical properties of the samples were characterized by PXRD, FESEM, TEM and FT-IR spectrometry. By coating mesoporous-structure on surface quartz crystal microbalance (QCM), fabricated gravimetric sensor exhibits high sensitivity p-toluene vapor even at trace levels. Additionally, limit detection (LOD) obtained experimentally is lower than 100 ppb, theoretical 57 ppb. Furthermore, good...

A porous MOF based on a tetranuclear copper cluster with intracluster antiferromagnetic interactions was synthesized, which reveals highly sensitive and selective sensing of small molecules.

Reaction of cupric salts with H(2)Rppz (R = H, Me; H(2)ppz 3-(2-hydroxyphenyl)pyrazole; H(2)Meppz 3-(2-hydroxy-5-methylphenyl)pyrazole) in the presence sodium azide and triethylamine as bases gave two high-nuclearity copper cage compounds [HNEt(3)](2)[Cu(21)(CH(3)CN)(2)(H(2)O)(mu(2)-N(3))(6)(mu(3)-N(3))(2)(ppz)(18)](H(2)O)(3)(EtOH)(2) (1) [Cu(16)(EtOH)(2)(H(2)O)(2)(Meppz)(16)]9.5 H(2)O (2), respectively. X-ray crystallographic studies revealed that molecular skeletons 1 2 are unique tricorne...

3,3′,5,5′-Azobenzenetetracarboxylic acid (H4abtc) was synthesized by reduction of 5-nitroisophthalic in basic aqueous/ethanol solution the presence Zn powder. Three novel coordination polymers {[Zn2(η6-ao2btc)(η2-2,2′-bpy)2(H2O)2]·2H2O}1n (1), {[Zn2(η8-aobtc)(η2-phen)(H2O)]·DMF}3n (2), and {(Hap)2[Zn3(η9-aobtc)2]·2H2O}3n (3) (2,2′-bpy = 2,2′-bipyridine, phen 1,10-phenanthroline, ap 4-aminopyridine, ao2btc4− aobtc4− are two oxidized forms H4abtc ligand) were prepared under hydrothermal...

Electron-withdrawing/coordinating o-phenolacetyl-substituted viologen can act as a visual sensor for solvents, bases, and temperature in organic solvents. Due to chelating phenolacetyl groups, this coordinate Fe(III), Cu(II), ZnCl2 aqueous DMF solutions. Interestingly, respond temperature, grind, NH3 vapor its solid state. Stimuli response is visible, fast, fully reversible air at room temperature. The color change attributed the enolic and/or free radical structure. This most versatile...

A complexone analog chemosensor, H2L, bearing chelating bis(2-pyridylmethyl) amine and alizarin groups was synthesized via the Mannich reaction. H2L chromically responds to OH-, F-, CH3COO-, H2PO4- in DMF, CH3CN, acetone, but not CH3OH or H2O. The addition of F- ions selectively induces a significant visible color change acetonitrile shifts both methylene proton signals upfield. also exhibits responses Mg2+, Sr2+, Ba2+, Tb3+, Cu2+, Co2+, Ni2+, Zn2+, Mn2+, Cd2+, Fe3+ solution. AlCl3 can form...

Three new metal-organic frameworks (MOFs), {(CH3NH3)3[Ba2(TTHA)(NO3)(H2O)2]}·2H2O (1), {(CH3NH3)4[Ba3(HTTHA)2(H2O)7]}·3H2O (2), and [Ba7(TTHA)2(NO3)2(H2O)10]·2H2O (3) (H6TTHA = 1,3,5-triazine-2,4,6-triamineh-exaacetic acid) have been synthesized characterized. The sensing properties of 1-3 were explored with regard to volatile organic compounds (VOCs) by the quartz crystal microbalance (QCM) technique. results indicated that 1 2 a much higher selectivity response chloromethanes (CH2Cl2,...

A new strategy is developed herein to improve the solid fluorescence of thiazolothiazole viologen by using ZnCl42– cluster as a scaffold hinder π-stacking. Importantly, Cl···H bonds are formed in state sustain framework and can be automatically dissociated when dissolved H2O, thus having no impact on strong emission aqueous solution. As such, first case organic–inorganic viologen–zinc halide named 4PV·ZnCl4 was designed synthesized, significant increase photoluminescence quantum yield (ΦF)...

Two chain compounds built with anti-anti acetate bridged Mn(III)(3)O units, [Mn(3)O(Clppz)(3)(EtOH)(4)(OAc)](n) (1) and [Mn(3)O(Clppz)(3)(EtOH)(2)(OAc)](n) (2), were synthesized characterized. The magnetic studies indicate that 1 is a single-chain magnet two slow magnetization relaxation processes which has for the first time been found in this type of complex, while 2 shows field-induced metamagnetic behavior. quite different behaviors resulted from number coordinated ethanol molecules on...