Thiacalix[4]arene-protected alkynyl Ag ( = 9, 18) nanoclusters: syntheses, structural characterizations, photocurrent responses and fluorescence properties.

Two thiacalix[4]arene-protected silver(I) alkynyl nanoclusters, [Na(HO)][Ag(TC4A)(BuCC)(CHOH)(SbF)(OH)]·3.5HO·CHOH (1, abbreviated as Ag9) and [Ag(TC4A)(BuCC)(CFCOO)]·4CHOH (2, abbreviated as Ag18), were synthesized by the reaction of [BuCCAg], -butylthiacalix[4]arene (HTC4A), NaBH, and AgSbF or CFCOOAg in the mixed solvent of methanol-trichloromethane-toluene under solvothermal conditions, respectively. Driven by SbF and CFCOO with different coordination properties, the structural unit [Ag(TC4A)(BuCC)] in both the compounds migrated in different modes, accompanied by distinct Ag⋯Ag distances.

Carboxylate Ligand-supported Ag (n=21 and 24) Alkynyl Clusters Induced by Single/Double Carbonate Ions.

Structural transformation is important for the study of silver cluster compounds, in which controlled synthesis of their shapes and sizes via anion template-driven is one key scientific question. In this work, the CO anion templates were captured by the [ BuC≡CAg] system under the stimulation induced by carboxylate ligand CF COO /PhCOO , and two silver alkynyl clusters [(CO )@Ag ( BuC≡C) (CF COO) (H O)]⋅DMF⋅2CH Cl (1) and [(CO ) @Ag ( BuC≡C) (PhCOO) ]⋅CH OH⋅4DMF (2) have been successfully isolated and charactered. With the increase of the number of CO templates from single to double, the outer silver atoms from twenty-one to twenty-four, accompanied by the growth of the cluster skeleton from 9.

Trapping a [W O ] Decatungstate Anion in an Ag Nanowheel.

Compound [Ag (W O )(S Bu) (CF COO) ](CF COO)  ⋅ 6H O (1) was synthesized through a one-pot method. This is the first case of isolating a new silver thiolate cluster containing a [W O ] template which transforms from WO polyoxoanion through a self-assembly process. The anionic nature of the reduced [W O ] template and the effective silver-oxygen interaction contribute to the formation of the Ag nanowheel in 1.

A one-dimensional infinite silver alkynyl assembly [Ag(C[triple bond, length as m-dash]C Bu)(CFCOO)(CHCN)] : synthesis, crystal structure and properties.

A high-yield silver alkynyl assembly [Ag(C[triple bond, length as m-dash]C Bu)(CFCOO)(CHCN)] (1) constructed from [AgC[triple bond, length as m-dash]C Bu] ligand, CFCOOAg and CHCN auxiliary ligands with a one-dimensional infinite chain structure has been obtained in one pot. Compound 1 has been well-defined and characterized. The photocurrent properties and the temperature-sensitive luminescent properties of 1 have been investigated.

A hierarchically assembled 88-nuclei silver-thiacalix[4]arene nanocluster.

Thiacalix[4]arenes as a family of promising ligands have been widely used to construct polynuclear metal clusters, but scarcely employed in silver nanoclusters. Herein, an anion-templated Ag nanocluster (SD/Ag88a) built from p-tert-butylthiacalix[4]arene (HTC4A) is reported. Single-crystal X-ray diffraction reveals that C-symmetric SD/Ag88a resembles a metal-organic super calix comprised of eight TC4A as walls and 88 silver atoms as base, which can be deconstructed to eight [CrO@Ag(TC4A)(EtS)(OAc)] secondary building units arranged in an annulus encircling a CrO in the center.

A Temperature-Sensitive Luminescent Ag Nanocluster Supported by TertButyl Thiol Ligands.

Compound [Ag S (StBu) (CF COO) (CO )](CO ) ⋅CH Cl ⋅4CH OH⋅9DMF (1) has been obtained and well defined. It consists of a multi-shell structure involving two Ag centres, one Ag S pentagram, two Ag S pentagons and one Ag S shell. Compound 1 has been characterized by XPS, FT-IR, PXRD, TGA, NMR, MS, UV/Vis spectrum, TEM and cyclic voltammetry.

[Linear discriminate analysis on annual and seasonal characteristics of major cations' profiles of rainwater at Zhoushan rain-sampling spot].

Rainwater samples were collected at rain-sampling Spot of Zhoushan in 2002-2003. Major cation concentrations (H+, NH4+, K+, Na+, Ca2+, Mg2+) of rainwater sample were determined. The concentration variation range and character were depicted by robust statistic analysis.