|别名||四丁基叠氮化铵;四-正叠氮丁铵;Tetra-n-Butylammonium azide; N,N,N-Tributyl-1-butanaminium azide Tetrabutylammonium nitride|
|个人防护设备||Eyeshields,Faceshields,Gloves,type P2 (EN 143) respirator cartridges|
Novel reverse-phase ion pair-high performance liquid chromatography separation of heparin, heparan sulfate and low molecular weight-heparins disaccharides and oligosaccharides.
In this study, by using tetrabutylammonium bisulfate as ion-pairing reagent, we were able to separate all the main heparin/heparan sulfate disaccharides generated by the action of heparinases along wi...Read More
Photoinduced ligand exchange and DNA binding of cis-[Ru(phpy)(phen)(CH3CN)2]+ with long wavelength visible light.
The complex cis-[Ru(phpy)(phen)(CH3CN)2](+) (phpy=2-phenylpyridine, phen=1,10-phenanthroline) was investigated as a potential photodynamic therapy (PDT) agent. This complex presents desirable photoche...Read More
Understanding how ion channels open and close their pores is crucial for comprehending their physiological roles. We used intracellular quaternary ammonium blockers, electrophysiology and X-ray crysta...Read More
Rapid and efficient synthesis of nucleoside polyphosphates and their conjugates using sulfonyl imidazolium salts.
This unit describes a method for preparing nucleoside polyphosphates and their conjugates such as nucleoside triphosphates, symmetrical and unsymmetrical dinucleoside polyphosphates and sugar nucleoti...Read More
RNA editing at four sites in eag, a Drosophila voltage-gated potassium channel, results in the substitution of amino acids into the final protein product that are not encoded by the genome. These site...Read More
The phase behavior of charged disk suspensions displays a strong dependence on ionic strengths, as the interplay between excluded volume and electrostatic interactions determines the formation of glas...Read More
Convenient and efficient approach to the permanent or reversible conjugation of RNA and DNA sequences with functional groups.
The conversion of 3',5'-disilylated 2'-O-(methylthiomethyl)ribonucleosides to 2'-O-(phthalimidooxymethyl)ribonucleosides is achieved in yields of 66% to 94%. Desilylation and depht...Read More
In the presence of Rh(2)(OAc)(4) (OAc = acetate) and TBA(2)WO(4) (TBA = tetra-n-butylammonium), the N-silylation of indole derivatives with hydrosilanes efficiently proceeded to give the corresponding...Read More
Molecular and system parameters governing mass and charge transport in polar liquids and electrolytes.
Onsager's model of the dielectric constant is used to provide a molecular-level picture of how the dielectric constant affects mass and charge transport in organic liquids and organic liquid elec...Read More
Synthesis of 9,9'-[1,2-ethanediylbis(oxymethylene)]bis-2-amino-1,9-dihydro-6H-purin-6-one, an impurity of acyclovir.
The synthesis of 9,9'-[1,2-ethanediylbis(oxymethylene)]bis-2-amino-1,9-dihydro-6H-purin-6-one, a minor impurity of acyclovir, is described. Starting with commercial N-(9-acetyl-6-oxo-1H-purin-2-y...Read More
A series of amino acid functionalized tripodal hexaamide anion receptors: ion-pair-assisted capped-cleft formation by a pentafluorophenyl-functionalized amide.
A new series of tris(2-aminoethyl)amine (tren)-based L-alanine amino acid backboned tripodal hexaamide receptors (L1-L5) with various attached moieties based on electron-withdrawing fluoro groups and ...Read More
A tetra-n-butylammonium (TBA) salt of a γ-Keggin -6-charged germanodecatungstate, [γ-H(2)GeW(10)O(36)](6-) (I), could act as an efficient homogeneous catalyst for Knoevenagel condensation of active ...Read More
Adsorption of phenanthrene by quaternary ammonium surfactant modified peat and the mechanism involved.
Removal of phenanthrene (PHE) from aqueous solution by adsorption onto quaternary ammonium surfactant modified peat was studied. The results show that surfactant modification enhanced the PHE adsorpti...Read More
Small-angle neutron scattering study of temperature vs. salt dependence of clouding in charged micellar system.
Clouding is studied by small-angle neutron scattering (SANS) on a charged micellar system of sodium dodecyl sulphate (SDS) and tetrabutylammonium bromide (TBAB) with varying temperature and salt NaCl....Read More
Tetrabutylammonium iodide catalyzed synthesis of allylic ester with tert-butyl hydroperoxide as an oxidant.
A metal-free C-H oxidation for the construction of allylic esters has been developed. The use of a commercially available and inexpensive catalyst and oxidant, and readily available starting materials...Read More
The interaction of exciton and charge transfer (CT) states plays a centralrole in photo-induced CT processes in chemistry, biology and physics. In thiswork, we use a combination of two-dimensional ele...Read More
Quantitative imaging of ion transport through single nanopores by high-resolution scanning electrochemical microscopy.
Here we report on the unprecedentedly high resolution imaging of ion transport through single nanopores by scanning electrochemical microscopy (SECM). The quantitative SECM image of single nanopores a...Read More
Monitoring of thiopurine metabolites - a high-performance liquid chromatography method for clinical use.
A high-performance liquid chromatography method capable of measuring thiopurine mono-, di-, and triphosphates separately in red blood cells (RBCs) was developed. RBCs were isolated from whole blood us...Read More
Tandem cyclization of α-cyano α-alkynyl aryl ketones induced by tert-butyl hydroperoxide and tetrabutylammonium iodide.
The radical cascade protocol of the α-cyano α-TMS/aryl-capped alkynyl aryl ketones promoted by tert-butyl hydroperoxide under catalysis with tetrabutylammonium iodide in refluxing benzene has been d...Read More
Efficient [WO4](2-)-catalyzed chemical fixation of carbon dioxide with 2-aminobenzonitriles to quinazoline-2,4(1H,3H)-diones.
A simple monomeric tungstate, TBA(2)[WO(4)] (I, TBA = tetra-n-butylammonium), could act as an efficient homogeneous catalyst for chemical fixation of CO(2) with 2-aminobenzonitriles to quinazoline-2,4...Read More
A series of synthetic molecules bearing the same hydrogen bonding mode observed in StClC were prepared and their transport ability of chloride ion across a lipid membrane was systematically optimized....Read More
We have developed the first example of hypervalent iodine(V)-catalyzed regioselective oxidation of phenols to o-quinones. Various phenols could be oxidized to the corresponding o-quinones in good to e...Read More
Development of a new and environment friendly hollow fiber-supported liquid phase microextraction using vesicular aggregate-based supramolecular solvent.
Hollow fiber-based liquid phase microextraction (HF-LPME) using conventional solvents is limited by their relative instability and high volatility. The use of supramolecular solvents as a liquid membr...Read More
Extraction and stability of pesticide multiresidues from natural water on a mixed-mode admicellar sorbent.
The suitability of a mixed-mode sorbent made up of admicelles of sodium dodecyl sulphate (SDS) and tetrabutylammonium (TBA) to extract and preserve pesticides from river and underground water was asse...Read More
A new kind of organic-inorganic hybrid complexes based on polyoxometalate were synthesized through symmetrically grafting two adeninyl groups onto Anderson-type MnMo(6) clusters and encapsulating the ...Read More