34,806 research outputs found
Optical particle detection integrated in a dielectrophoretic lab-on-a-chip
No full textThe design and fabrication of a dielectrophoretic "lab-on-a-chip" device for bioparticle processing and counting is presented. The device consists of a multi-layer travelling wave dielectrophoretic electrode array for manipulating particles and/or fluids, micro channels for delivering samples, and optical fibres for counting particles and/or measuring their velocities. Single particles were detected optically using either light scattering or fluorescence emission. The technology described in this work is potentially applicable to a range of particulate diagnostic systems
C-H-activated aluminum hydroxide via molecular oxygen
No full textThe reaction of LAl[eta(2)-(C-2(SiMe3)(2))] (1; L = HC[(CMe)(NDipp)](2), Dipp = 2,6-iPr(2)C(6)H(3)) with dioxygen leads to the elimination of bis(trimethylsilyl)acetylene and the formation of the corresponding aluminum monohydroxide via the oxidation of one of the CHMe2 groups on the Dipp ring
Synthesis and structure of a monomeric aluminum(I) compound [{HC(CMeNAr)(2)}Al] (Ar=2,6-iPr(2)C(6)H(3)): A stable aluminum analogue of a carbene
No full textStable, monomeric imides of aluminum and gallium: Synthesis and characterization of [{HC(MeCDippN)(2)}MN-2,6-Trip(2)C(6)H(3)] (M = Al or Ga; Dipp=2,6-iPr(2)C(6)H(3); Trip=2,4,6-iPr(3)C(6)H(2))
No full text[HC{(CMe) (NAr)}(2)]Al[(NSiMe3)(2)N-2] (Ar=2,6-iPr(2)C(6)H(3)): The first five-membered AlN4 ring system
No full textPyrrolylaldiminato complexes of Zn, Mg and Al
No full textThe reaction of 2-(2,6-iPr(2)C(6)H(3)N = CH)-5-R-C4H2NH (R = H, (LH)-H-1; R = tBu, (LH)-H-2) with one equivalent of ZnMe2 or MgnBu(2) in toluene or n-hexane afforded the bis(pyrrolylaldiminato) complexes ZnL21 (1), ZnL22 (2) and MgL22 (3). Crystalline 2 2 MgL21.THF (4THF) was formed by treatment of LiL1 with MeMgCl in THF followed by recrystallization from n-hexane. (LAlMe2)-Al-1 (6) and (LAlMe2)-Al-2 (7) were readily prepared by refluxing (LH)-H-1 and (LH)-H-2 with AlMe3 in toluene or n-hexane for several hours, However, the reaction of LiL1 with AlCl3 in a 1:1 molar ratio provided (L2AlCl)-Al-1 (8), while the reaction of KL2 with AlCl3 afforded (LAlCl2)-Al-2 (9). Compounds 2, 3, 5, and 8 were characterized by a single-crystal X-ray structural analysis. Compounds 2, 3, and 5 all have a tetrahedral geometry around the metal atom, while the five-coordinate aluminum in 8 has a trigonal bipyramidal geometry
Pyrrolylaldiminato complexes of Zn, Mg and Al
No full textThe reaction of 2-(2,6-iPr(2)C(6)H(3)N = CH)-5-R-C4H2NH (R = H, (LH)-H-1; R = tBu, (LH)-H-2) with one equivalent of ZnMe2 or MgnBu(2) in toluene or n-hexane afforded the bis(pyrrolylaldiminato) complexes ZnL21 (1), ZnL22 (2) and MgL22 (3). Crystalline 2 2 MgL21.THF (4THF) was formed by treatment of LiL1 with MeMgCl in THF followed by recrystallization from n-hexane. (LAlMe2)-Al-1 (6) and (LAlMe2)-Al-2 (7) were readily prepared by refluxing (LH)-H-1 and (LH)-H-2 with AlMe3 in toluene or n-hexane for several hours, However, the reaction of LiL1 with AlCl3 in a 1:1 molar ratio provided (L2AlCl)-Al-1 (8), while the reaction of KL2 with AlCl3 afforded (LAlCl2)-Al-2 (9). Compounds 2, 3, 5, and 8 were characterized by a single-crystal X-ray structural analysis. Compounds 2, 3, and 5 all have a tetrahedral geometry around the metal atom, while the five-coordinate aluminum in 8 has a trigonal bipyramidal geometry
Design and fabrication of travelling wave dielectrophoresis structures
No full textThe design and fabrication of a generic travelling wave dielectrophoretic separation system is presented. A range of technical issues have been addressed and resolved. These include the optimization of the electrical insulation and electrical contact between different electrode layers and the choice of materials. A new method for fabricating microfluidic liquid channels, the fluidic channel cover and the seal within the channel, as well as an effective sample introduction system has been developed. A complete particle handling and fractionation system has been fabricated and the functioning of the device demonstrated with latex particles
The first structurally characterized metal-SeH compounds: [LAl(SeH)(2)] and [L(HSe)AlSeAl(SeH)L]
No full textSynthesis, molecular structure, and olefin polymerisation activity of an oxovanadium(v) alkoxide with unprecedented chloride bridging ligands
No full textThe reaction of 2-methoxyethanol or (2-methoxyethanolato)lithium with VOCl3 yields the chloro-bridged dinuclear complex [VOCl2(OCH2CH2OCH3)](2), which has been characterised spectroscopically and structurally by single-crystal X-ray diffraction analysis. This is the first reported structure of a neutral dinuclear oxovanadiurn complex connected by bridging chloro ligands. The orange complex is a precatalyst for the polymerisation of ethene and the oligomerisation of styrene. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)
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