A rapid, inexpensive surface treatment for enhanced functionality of polydimethylsiloxane microfluidic channels.

A rapid, inexpensive method using alkoxysilanes has been developed to selectively coat the interior of polydimethylsiloxane (PDMS) microfluidic channels with an integral silicaceous layer. This method combines the rapid prototyping capabilities of PDMS with the desirable wetting and electroosmotic properties of glass. The procedure can be carried out on the open faces of PDMS blocks prior to enclosure of the channels, or by flowing the reagents through the preformed channels.

Synthesis and characterization of methylammonium borohydride.

A new borohydride, [CH(3)NH(3)](+)[BH(4)](-), has been synthesized through the metathesis of CH(3)NH(3)F and NaBH(4) in methylamine. Room-temperature X-ray diffraction studies have shown that [CH(3)NH(3)](+)[BH(4)](-) adopts a tetragonal unit cell with considerable hydrogen mobility similar to that observed in NH(3)BH(3). The kinetics and thermodynamics of hydrogen release have been investigated and were found to follow a similar pathway to that of [NH(4)](+)[BH(4)](-).

Ligand-functionalised copper(II) hydroxide for quantum dot photoluminescence quenching.

The preparation of ligand-functionalised copper(II) hydroxide (Cu(OH)(2)) particles and their conjugation with hydrophobic CdSeS quantum dots (QDs) is reported. The photoluminescence of the QDs is efficiently quenched upon their conjugation with the functionalised Cu(OH)(2) particles. Cu(OH)(2) was functionalised with 2,2'-dipyridyl (2,2-bipy) and n-octanoic acid (OcA), by adsorption of the desired ligand to Cu(OH)(2) suspended in solvent.

Interaction of ammonia borane with Li2NH and Li3N.

Interaction of NH(3)BH(3) and Li(2)NH (or Li(3)N) in THF leads to the formation of NH(3) and LiNH(2)BH(3), which further react with each other and produce ca. 10 wt.% hydrogen at 45 degrees C.

The first example of a mixed alkoxide hydride of boron: sodium boron isopropoxide trihydride.

The title compound, poly[[mu-trihydro(isopropoxy)borato]sodium(I)], [Na(C(3)H(10)BO)](n), forms unique polymeric layers normal to the c axis via Na(+)...

catena-Poly[sodium(I)-μ-tetra-butoxy-borato].

The title compound, [Na(C(16)H(36)BO(4))](n), has a fourfold axis passing through the Na and B atoms which both are bound by four O atoms. The tetra-butoxy-borate anion provides the bridging to form one-dimensional polymers running along [001], just like those found for the tetra-ethoxy-borate structure. The two but-oxy 'tail' atoms are disordered over two conformations in a 0.

Redetermination of the borax structure from laboratory X-ray data at 145 K.

THE TITLE COMPOUND, SODIUM TETRABORATE DECAHYDRATE (MINERAL NAME: borax), Na(2)[B(4)O(5)(OH)(4)]·8H(2)O, has been studied previously using X-ray [Morimoto (1956). Miner. J.

Dihydrobis(methylamine)borate triiodide.

Both cation and anion in the title compound, C2H12BN2+.I3-, lie on a crystallographic mirror plane and are bound in the lattice by N-H..

In situ synthesis of polysulfides covalently bonded to silica.

Silanol groups, triple bond SiOH, on the surface of silica were esterified with unsaturated alcohols and long-chain alcohols bearing thiol groups. The modified silicas obtained were used as substrates for a vulcanization-analogous reaction with sulfur catalyzed by zinc dimethyldithiocarbamate. Surface-esterified thiols could be smoothly converted to bridged polysulfides bonded to the silica surface, whereas the use of surface-esterified unsaturated alcohols led to removal of the surface-esterified alcohol from the silica surface.

catena-Poly[sodium(I)-mu-tetraethoxyborato].

The title compound, [Na(C8H20BO4)]n, has twofold crystallographic symmetry, with the Na+ cations bound by four O atoms [Na-O=2.251 (3) A]. The tetraethoxyborate anion acts as a bridging ligand to form one-dimensional polymers running along the twofold crystal axis.

Poly[di-mu2-methanolato-di-mu2-tetramethoxyborato-disodium(I)].

In the polymeric title compound, [Na2(C4H12BO4)2(CH4O)2]n, the two independent sodium cations are bound by five O atoms. All the O atoms of one tetramethoxyborate anion bind cations, forming a tetrameric cluster around a tetragonal inversion centre [Na-O = 2.2777 (18)-2.

Poly[tetrasodium(I)-tetra-mu2-bis(butane-1,4-diyldioxy)borato-mu2-1,4-butanediol].

In the title compound, [Na4(C8H16BO4)4(C4H10O2)]n, there are two coordination types for the four independent Na+ cations: two Na+ cations bond to six diolate O atoms [Na-O = 2.305 (2)-2.609 (2) A], while the other two are five-coordinate via one 1,4-butanediol [2.

Unprecedented oxo-titanium citrate complex precipitated from aqueous citrate solutions, exhibiting a novel bilayered Ti8O10 structural core.

Aqueous titanium citrate solutions were prepared from the reaction of citric acid with titanium 2-propoxide in a range of molar ratios. Solutions containing two or fewer citrates per titanium resulted in the slow crystallization of an insoluble titanium oxo-citrate complex. Single-crystal X-ray analysis identified the species as Ti(8)O(10)(citrate)(4)(H(2)O)(12).

An oxo-bridged centrosymmetric tetranuclear titanium compound.

The title compound, octa-tert-butoxybis[micro(3)-2,2'-(N-methylimino)diethanolato]di-micro-oxo-tetratitanium(IV), [Ti(2)O[(OCH(2)CH(2))(2)(NCH(3))][(CH(3))(3)CO](4)](2) or [Ti(4)(C(5)H(11)NO(2))(2)(C(4)H(9)O)(8)O(2)], lies about an inversion centre, and displays the less usual zigzag configuration. One O atom of the N-methyldiethoxoamine ligand bridges the symmetry-related Ti atoms, while the other bridges the two independent Ti atoms, with the N atom binding to give a facial configuration. Four (t)BuO(-) ligands and a bridging oxide complete the respective five- and sixfold coordination of the two Ti atoms.

A novel titanium-mu-O-zirconium complex: bis(mu-methyliminodiethanolato-1kappa(3)O,N,O';1:2kappa(2)O)(methyliminodiethanolato-2kappa(3)O,N,O')dipropanolato-1kappaO,2kappaO-titanium(IV)zirconium(IV).

The title compound, [TiZr(C(5)H(11)NO(2))(3)(C(3)H(7)O)(2)], contains three methyliminodiethanolate ligands, two in different mu-oxo bridging coordination modes and one bound only to the Ti atom. The Ti and Zr atoms have distorted octahedral and pentagonal-bipyramidal coordinations, respectively, which share edges. As well as some conformational disorder in the carbon chains, there is chemical disorder at one Ti site, with a mix of n- and isopropanolate ligands.

Multiple bridging modes in a novel trinuclear titanium 1,3-dioxypropane compound, Ti3(methyliminodiethanolate)2(1,3-propanediolate)4.

The title compound, bis(2,2'-methyliminodiethanolato)-1kappa(3)O,N,O';3kappa(3)O,N,O'-di-micro(3)-propane-1,3-diolato-1:2:3kappa(8)O:O,O':O'-micro-propane-1,3-diolato-1:3kappa(2)O:O'-propane-1,3-diolato-2kappa(2)O,O'-trititanium(IV), [Ti(3)(C(5)H(11)NO(2))(2)(C(3)H(6)O(2))(4)], has four 1,3-propanediolate ligands binding in three different modes. Two ligands chelate adjacent Ti atoms with normal micro(3)-O bridges, giving typical edge-sharing of the Ti distorted octahedra, one chelating to the central Ti atom with no micro-bridging, and the other spanning the cluster, binding only to the outermost Ti atoms. The two methyliminodiethanolate ligands each coordinate to the outer Ti atoms via their N and two O atoms.