Syntheses and structures of [M{In(SC{O}Ph)4}2] (M = Mg and Ca): single molecular precursors to MIn2S4 materials.

The compounds [Mg{In(SC{O}Ph)4}2] (1) and [Ca(H2O)x{In(SC{O}Ph)4}2].yH2O (x = 0, y = 1, 2 major product; x = 1, y = 0, 2a minor product; x = 2, y = 2, 2b minor product) have been synthesized by reacting InCl3 and M(SC{O}Ph)2 (M = Mg and Ca) prepared in situ in the molar ratio 1:2. The structures of 1, 2a, and 2b have been determined by X-ray crystallography.

Surface plasmon resonance spectroscopy and electrochemistry study of 4-nitro-1,2-phenylenediamine: a switchable redox polymer with nitro functional groups.

Electrochemistry and electrochemical surface plasmon resonance (SPR) spectroscopy have been applied to study the electrochemical deposition and the redox transition of poly(4-nitro-1,2-phenylenediamine) (P4NoPD) on gold disk. It was shown that SPR can be the signal transducer for the different redox states of P4NoPD. Using a model biomolecular system, involving streptavidin, biotinylated DNA, and its complementary target DNA, it was found that the presence of nitro groups in P4NoPD allows the biorecognition events to be modulated by voltages.

Solvent-induced shape evolution of PVP protected spherical silver nanoparticles into triangular nanoplates and nanorods.

The reaction between silver nitrate and poly(N-vinyl-2-pyrrolidone) (PVP) in pyridine at ambient conditions could lead to the formation of spherical nanoparticles or quadrilateral and triangular silver nanoplates, depending on the silver-to-PVP ratio used. It is proposed that the spherical Ag nanoparticles, which were formed early in the reaction, were transformed into nanoplates through an Ostwald ripening process driven by the bridging flocculation of small spherical Ag nanoparticles. This unique and hitherto unreported shape evolution process was carefully followed by a combination of techniques, viz.

Acetate stabilization of metal nanoparticles and its role in the preparation of metal nanoparticles in ethylene glycol.

Acetate-stabilized ruthenium nanoparticles were prepared by the NaBH4 reduction of the metal precursor salt at room temperature. Nanoparticles with a mean diameter of 2.20 nm and a standard deviation of 1.

Hydrogen-bonded polyrotaxane-like structure containing cyclic (H2O)4 in [Zn(OAc)2(mu-bpe)]2.H2O: X-ray and neutron diffraction studies.

The reaction of 4,4'-bipyridylethane (bpe) and 4,4'-dipyridyl disulfide (dpds) with Zn(OAc)2.2H2O has led to the formation of two coordination polymers, [Zn(OAc)2(mu-bpe)].2H2O (1) and [Zn(OAc)2(mu-dpds)] (2).

A highly efficient phase transfer method for preparing alkylamine-stabilized Ru, Pt, and Au nanoparticles.

A highly efficient phase-transfer method was developed to prepare alkylamine-stabilized nanoparticles of several noble metals. This method involved first mixing the metal hydrosols and an ethanol solution of dodecylamine and then extracting the dodecylamine-stabilized metal nanoparticles into toluene. The efficiency of this phase-transfer method was nearly 100%.

Preparation and characterization of positively charged ruthenium nanoparticles.

Positively charged ruthenium nanoparticles were prepared by NaBH(4) reduction at room temperature and at pH values lower than 4.9. The ruthenium nanoparticles were characterized by zeta potential measurement, TEM, XPS, and XRD.

A novel synthesis route for ethylenediamine-protected ruthenium nanoparticles.

A novel method has been developed to prepare water-dispersible ethylenediamine (en)-stabilized ruthenium nanoparticles. The procedure involves the reduction of an en-RuCl(3) complex by sodium borohydride. The Ru nanoparticles so prepared are fairly stable in water.

Chemistry of thiocarboxylates: synthesis and structures of neutral copper(I) thiocarboxylates with triphenylphosphine.

The reactions of Na+ R[O]CS- (R = Me, Ph) with mixtures of CuCl and PPh3 in stoichiometric ratios yielded the compounds [Cu4(SC[O]Me)4(PPh3)4] (1), [Cu4(SC[O]Ph)4(PPh3)3] (2), [Cu2(SC[O]Me)2(PPh3)4] (3), [Cu(SC[O]Ph)(PPh3)2] (4), and [Cu2(SC[O]Ph)2(PPh3)3] (5) quantitatively. Compound 2 was also obtained from mixtures of CuCl, PPh3, and NaSC[O]Ph in the ratio 1:1:1. The analogous thioacetate compound similar to 2 and the thiobenzoate analogue of 1 could not be obtained.

Single-source precursors to ternary silver indium sulfide materials.

Compounds of type [(Ph3P)2AgIn(SC(O)R)4] (R = Me (1), Ph (2)) are excellent single-source precursors for AgInS2 bulk materials by pyrolysis and AgIn5S8 films by aerosol assisted chemical vapour deposition (AACVD).

New metalloligands [M(SC[O]Ph)(4)](-): synthesis and characterization of polymeric [A(MeCN)(x)[M(SC[O]Ph)(4)]] compounds (A = Li, Na and K; M = Ga and In; x = 0-2).

Exploiting the ability of the [M(SC[O]Ph)(4)](-) anion to behave like an anionic metalloligand, we have synthesized [Li[Ga(SC[O]Ph)(4)]] (1), [Li[In(SC[O]Ph)(4)]] (2), [Na[Ga(SC[O]Ph)(4)]] (3), [Na(MeCN)[In(SC[O]Ph)(4)]] (4), [K[Ga(SC[O]Ph)(4)]] (5), and [K(MeCN)(2)[In(SC[O]Ph)(4)]] (6) by reacting MX(3) and PhC[O]S(-)A(+) (M = Ga(III) and In(III); X = Cl(-) and NO(3)(-); and A = Li(I), Na(I), and K(I)) in the molar ratio 1:4. The structures of 2, 4, and 6 determined by X-ray crystallography indicate that they have a one-dimensional coordination polymeric structure, and structural variations may be attributed to the change in the alkali metal ion from Li(I) to Na(I) to K(I). Crystal data for 2 x 0.

Synthesis, structure, and multi-NMR studies of (Me4N)[A(M(SC(O)Ph)3)2] (A = Na, M = Hg; A = K, M = Cd or Hg).

The compounds (Me4N)[A(M(SC(O)Ph)3)2] (A = K, M = Cd (2); A = Na, M = Hg (3); and A = K, M = Hg (4)) were synthesized by reacting the appropriate metal chloride with A+PhC(O)S- and Me4NCl in the ratios 1:3:1 and 2:6:1. The structures of these compounds were determined by single-crystal X-ray diffraction methods. All the compounds are isomorphous, isostructural, and crystallized in the space group P1 with Z = 1.