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1.
Chem Commun (Camb) ; 57(27): 3339-3342, 2021 Apr 07.
Article in English | MEDLINE | ID: mdl-33657199

ABSTRACT

A new conjugated ionic porous organic polymer (AN-POP), incorporated with anthracene-extended viologen, has been rationally designed and prepared to explore its dual functions in photocatalytic oxidation and bacterial killing. Compared with its anthracene-free counterpart (BD-POP), AN-POP showed a superior photocatalytic oxidation performance and antibacterial activity demonstrating the critical role of an anthracene-extended viologen structure.


Subject(s)
Anthracenes/pharmacology , Anti-Bacterial Agents/pharmacology , Polymers/pharmacology , Viologens/pharmacology , Anthracenes/chemistry , Anti-Bacterial Agents/chemical synthesis , Anti-Bacterial Agents/chemistry , Catalysis , Escherichia coli/drug effects , Ions/chemistry , Ions/pharmacology , Microbial Sensitivity Tests , Molecular Structure , Oxidation-Reduction , Particle Size , Photochemical Processes , Polymers/chemistry , Porosity , Staphylococcus aureus/drug effects , Surface Properties , Viologens/chemistry
2.
Soft Matter ; 13(22): 4074-4079, 2017 Jun 07.
Article in English | MEDLINE | ID: mdl-28537314

ABSTRACT

A novel C3-symmetric benzene-1,3,5-tricarboxamide (BTAs) decorated with three identical pillar[5]arene tails was designed, synthesized and characterized. The compound can gelate acetonitrile at low concentration (0.2 wt%) upon sonication at room temperature, but a precipitate was obtained by a conventional heating-cooling process. Scanning electron microscopy revealed that the gel and precipitate were constructed by entangled, high-aspect-ratio flexible bundles of nanofibrils. UV-vis spectroscopy, circular dichroism, Fourier transform infrared microscopy and powder X-ray diffraction showed that the compound formed chiral, elongated, columnar aggregates with nanofiber morphology by a combination of intermolecular hydrogen bonding between the N-H and C[double bond, length as m-dash]O of amides, π-π stacking (H-aggregates) and hydrophobic interactions of peripheral groups.

3.
Org Biomol Chem ; 13(7): 1979-82, 2015 Feb 21.
Article in English | MEDLINE | ID: mdl-25563510

ABSTRACT

Gemini surfactant-like receptor is designed and synthesized. The special preassembly phenomenon of in a nonpolar solvent facilitates the novel ratiometric fluorescence sensing of H2PO4(-)via an anion-induced reassembly process in organic solvents and an anion-induced disassembly process in water.

4.
ACS Appl Mater Interfaces ; 5(23): 12411-8, 2013 Dec 11.
Article in English | MEDLINE | ID: mdl-24224803

ABSTRACT

The porous hierarchical MgO with superb adsorption properties has been synthesized by a facile and scaled-up method. The X-ray powder diffraction, electron microscopy, Fourier transformed infrared, and N2 adsorption-desorption were carried out to study the microstructure of the as-synthesized precursor and product. It has been demonstrated that the as-prepared MgO has a porous hierarchical structure and a high specific surface area (148 m(2) g(-1)). And the MgO sample exhibited super adsorption properties, with maximum adsorption capacity of 2409 mg g(-1) for Congo red, which is the highest reported value. Moreover, the adsorption process of Congo red on porous hierarchical MgO was systematically investigated, which was found to obey the pseudo-second-order rate equation and Langmuir adsorption model.

5.
Dalton Trans ; 42(28): 10093-6, 2013 Jul 28.
Article in English | MEDLINE | ID: mdl-23728488

ABSTRACT

Efficient ratiometric fluorescent Fe(3+) probes were designed and synthesized by linking a conjugated naphthalene chromophore to a rhodamine platform and a lipophilic triphenylphosphonium (TPP) cation. The probes could sensitively and selectively detect mitochondrial Fe(3+) in living cells.


Subject(s)
Fluorescent Dyes/chemistry , Iron/analysis , Mitochondria/chemistry , Fluorescence Resonance Energy Transfer , HeLa Cells , Humans , Iron/chemistry , Naphthalenes/chemistry , Organophosphorus Compounds/chemistry , Rhodamines/chemistry
6.
Article in English | MEDLINE | ID: mdl-23602425

ABSTRACT

A new conjugated phosphonium salt TPP was synthesized readily from phosphine-triggered ring-opening of 2,4,5-triphenylpyrylium salt. In aqueous solution, it exhibited interesting AIEE properties and self-assembled into fluorescent nanoparticles, which can be used as a fluorescence probe to image mitochondria in cells.


Subject(s)
Fluorescent Dyes/analysis , Mitochondria/ultrastructure , Nanoparticles/analysis , Phosphines/analysis , HEK293 Cells , Humans , Microscopy, Confocal , Nanoparticles/ultrastructure , Salts/analysis
7.
Acta Crystallogr C ; 68(Pt 11): m306-8, 2012 Nov.
Article in English | MEDLINE | ID: mdl-23124449

ABSTRACT

In the title cadmium metal-organic framework complex, [Cd(C(8)H(3)NO(6))(C(24)H(16)N(2))](n) or [Cd(NIPH)(dpphen)] (NIPH is nitroisophthalate and dpphen is 4,7-diphenyl-1,10-phenanthroline), the unique Cd(II) cation in a general position is coordinated by four carboxy O atoms from three symmetry-related NIPH anions and two N atoms from a dpphen ligand. The Cd(II) cations are bridged by pairs of NIPH anions to generate a dinuclear molecular building block, [Cd(2)N(4)(CO(2)R)(4)], with a Cd···Cd separation of 4.0936 (10) Å. Each such building block is connected to four adjacent dinuclear building blocks by NIPH anions, resulting in a two-dimensional layer framework in the bc plane. The dpphen ligands occupy the space between these layers and are linked by π-π interactions, with a separation of 3.4541 (6) Å between the central aromatic rings of inversion-related dpphen ligands. The thermogravimetric and photoluminescent properties of the complex have also been investigated.

8.
Inorg Chem ; 49(3): 1186-90, 2010 Feb 01.
Article in English | MEDLINE | ID: mdl-20038139

ABSTRACT

Three framework silver-thioantimonates, K(3)Ag(9)Sb(4)S(12)(1), Rb(3)Ag(9)Sb(4)S(12)(2), and Cs(3)Ag(9)Sb(4)S(12)(3), and one layered silver-thioarsenate, CsAg(2)AsS(3)(4), have been synthesized solvothermally in the presence of thiophenol as a mineralizer. Compounds 1, 2, and 3 are isostructural and contain infinite silver-sulfur chains [Ag(9)S(12)](15-). These chains are connected to one another by the antimony atoms to generate wide channels along the [001] direction where the alkali metal cations reside. The structure of 4 consists of helical chains [Ag(2)S(3)](4-) linked by the arsenic atoms to form layers with potassium ions between the layers.


Subject(s)
Antimony/chemistry , Arsenates/chemistry , Silver/chemistry , Sulfur/chemistry , Crystallography, X-Ray , Models, Molecular
9.
J Org Chem ; 70(14): 5768-70, 2005 Jul 08.
Article in English | MEDLINE | ID: mdl-15989371

ABSTRACT

[reaction: see text] Oxidation of substituted cyclopentadienes by molecular oxygen afforded the corresponding pyrylium cations in acidic solution, whereby an oxygen atom was inserted into the cyclopentadiene ring. This novel one-step reaction proceeds in a different yield depending on substitution patterns of the cyclopentadiene. A possible reaction pathway and formation mechanism of the pyrylium cation are proposed and discussed.

10.
Spectrochim Acta A Mol Biomol Spectrosc ; 62(4-5): 835-9, 2005 Dec.
Article in English | MEDLINE | ID: mdl-15950527

ABSTRACT

Two novel phenylated pyrylium compounds, silver (I)-bridged 2,3,4,5-tetraphenylpyrylium perchlorate (P1) and its silver (I)-free pyrylium ligand (P2) were prepared from 1,2,3,4-tetraphenylcyclopentadiene to examine their spectroscopic behaviors. The UV/vis absorption and fluorescent emission spectra of P1 and P2, measured in three solvents (acetonitrile, dichloromethane and toluene), reveal that the photophysical behaviors are closely related to silver (I) fragment, and strongly dependent on solvent polarity. In polar acetonitrile, P1 displays longer absorption wavelength and much lower fluorescent emission intensity than P2, although they exhibit much similarity in shape. In contrast, in nonpolar toluene, while P2 shows an apparent absorption band at 338 nm, P1 displays a tail-like line without absorption band observed. All the spectra obtained indicate a better coplanarity and a stronger intra-molecular charge transfer in P1 due to the effect of silver (I) fragment. Additionally, the 1H NMR spectra of P1 and P2, which were recorded under the same conditions, indicate that the silver (I) fragment reinforces pyrylium ring's capacity to localize the formal positive charge within the heterocyclic ring.


Subject(s)
Heterocyclic Compounds, 3-Ring/chemistry , Salts/chemistry , Silver/chemistry , Magnetic Resonance Spectroscopy , Solvents , Spectrometry, Fluorescence
11.
Acta Crystallogr C ; 61(Pt 4): m194-6, 2005 Apr.
Article in English | MEDLINE | ID: mdl-15805619

ABSTRACT

In the title complex, [Ag2(C7H4NO4)2(C16H16S2)], each Ag(I) atom is trigonally coordinated by one S atom of a 2,11-dithia[3.3]paracyclophane (dtpcp) ligand, and by one N and one O atom of a 6-carboxypyridine-2-carboxylate ligand. Dtpcp acts as a bidentate ligand, bridging two inversion-related AgI atoms to give a dinuclear silver(I) compound. The dinuclear moieties are interconnected via O-H...O hydrogen bonds to form a two-dimensional zigzag sheet. Two such sheets are interwoven via pi-pi interactions between pyridine rings, affording an interwoven bilayer network.

12.
Inorg Chem ; 44(4): 1031-6, 2005 Feb 21.
Article in English | MEDLINE | ID: mdl-15859283

ABSTRACT

Three luminescent silver(I)-oligo(phenylenevinylene) complexes, [Ag2(bmsb)(ClO4)2] (1), [Ag2(bmsb)(H2O)4](BF4)2 (2), and [Ag2(bdb)(CF3SO3)2] (3) (bmsb = 1, 4-bis(methylstyryl)benzene, bdb = 4,4'-bis(2, 5-dimethylstryryl)biphenyl), have been synthesized and structurally characterized. Complexes 1 and 2 are 2D networks with unique metallocyclophane motifs. Complex 3 affords a 2D zigzag sheet, in which silver triflates form tubelike double chains and bdb molecules act as linkages. Complex 2 exhibits high electric conductivity because of columnar aromatic stackings formed through intra- and intermolecular pi-pi interactions. Complexes 1-3 in the solid state exhibit luminescence, of which excitation and emission maxima are shifted to longer wavelength as compared to those of the corresponding metal-free ligands.

13.
J Org Chem ; 69(4): 1432-4, 2004 Feb 20.
Article in English | MEDLINE | ID: mdl-14961713

ABSTRACT

Phenyl-substituted cyclopentadienes are proved to form phenylated pyrylium cations in the presence of silver(I) perchlorate by insertion of an oxygen atom into the cyclopentadiene-ring. Three phenylated pyrylium compounds, [(Ph(5)C(5)O(+))(ClO(4)(-))](2)(CH(2)Cl(2)) (1), Ag(ClO(4))(H(2)O)(Ph(4)HC(5)O(+)) (ClO(4)(-)) (2), and (Ph(3)H(2)C(5)O(+))(ClO(4)(-)) (3) have been synthesized and characterized. A possible reaction pathway and formation mechanism of the pyrylium cation are proposed and discussed.

15.
Inorg Chem ; 37(21): 5651-5656, 1998 Oct 19.
Article in English | MEDLINE | ID: mdl-11670714

ABSTRACT

This paper describes two copper(I) supramolecules with the same anion and cation but quite different topologies and properties. The reaction of [Cu(CH(3)CN)(4)]PF(6) and 1,2,4,5-tetracyanobenzene (TCNB) leads to two novel polymeric coordination compounds, [Cu(2)(TCNB)(3)](PF(6))(2)(Me(2)CO)(4)( )()(1) and [Cu(2)(TCNB)(3)](PF(6))(2) (2), depending on the solvents used. The crystal structures have been determined by single-crystal X-ray diffraction. Crystal data are as follows. 1: C(21)H(15)N(6)O(2)CuPF(6), monoclinic, P2(1)/a, a = 11.553(4) Å, b = 16.135(7) Å, c = 15.046(3) Å, beta = 108.08(2) degrees, Z = 4. 2: C(15)H(3)N(6)CuPF(6), orthorhombic, Cmcm, a = 28.282(3) Å, b = 10.337(3) Å, c = 16.285(4) Å, Z = 16. In both polymers, copper(I) ions have similar pseudotetrahedral environments and the four coordination sites are fully occupied by the four bridging ligands, two &mgr;(2)-TCNB and two &mgr;(4)-TCNB groups. Polymer 1, obtained in acetone, revealed a two-dimensional zigzag sheet network between copper(I) ions, whereas 2, synthesized in methylethyl ketone, displayed a three-dimensional porous framework with different functional groups (or atom) in different cavities. The redox, magnetic, and conductive behaviors of both complexes are discussed. It is demonstrated that the two complexes give different physicochemical properties.

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