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Страница 1 од 19 резултати
Directional control and supramolecular protection allowing the chemo- and regioselective transformation of a triamine.
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A Zn(II)-funnel complex based on a calix[6]arene ligand decorated with three tris(imidazolyl) arms at one end of the cone and three NH(2) substituents at the other end, acts as a multipoint recognition host for polyfunctionalized guests. The selectivity is ensured by coordination to Zn(II), CH-pi
Syntheses, conformations, and basicities of bicyclic triamines.
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The multistep syntheses of several bicyclic triamines are described, all of which have an imbedded 1,5,9-triazacyclododecane ring. In 1,5,9-triazabicyclo[7.3.3]pentadecanes 12, 13, 15, and 16, two nitrogens are bridged by three carbons. The monoprotonated forms of these triamines are highly
Extraction of urinary cell-free DNA by using triamine-modified silica particles for liquid biopsy
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The presence of approximately 200-bp cell-free DNA (cfDNA) in the urine has attracted attention as a biomarker for liquid biopsy. However, it is currently useful only for diagnoses of cancers in which a large amount of cfDNA is excreted in the urine. Therefore, the development of an efficient method
Colocalization of gadolinium-diethylene triamine pentaacetic acid with high-molecular-weight molecules after intracerebral convection-enhanced delivery in humans.
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BACKGROUND
Convection-enhanced delivery (CED) permits site-specific therapeutic drug delivery within interstitial spaces at increased dosages through circumvention of the blood-brain barrier. CED is currently limited by suboptimal methodologies for monitoring the delivery of therapeutic agents that
Synthesis, cytotoxicity and cucurbituril binding of triamine linked dinuclear platinum complexes.
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The platinum complexes trans-[{PtCl(NH3)2}2(micro-NH2(CH2)3NH2(CH2)3NH2)]3+ (CT033) and the corresponding N4-dimethyl linked analogue trans-[{PtCl(NH3)2}2(micro-NH2(CH2)3N(Me)2(CH2)3NH2)]3+ (CT233) have been synthesised, and their cytotoxicity, ability to bind cucurbit[7,8]uril (Q[7,8]) and reaction
Synthesis, spectroscopic studies and inhibitory activity against bacteria and fungi of acyclic and macrocyclic transition metal complexes containing a triamine coumarine Schiff base ligand.
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Two series of new mono and binuclear complexes with a Schiff base ligand derived from the condensation of 3-acetylcoumarine and diethylenetriamine, in the molar ratio 2:1 have been prepared. The ligand was characterized by elemental analysis, IR, UV-visible, (1)H-NMR and mass spectra. The reaction
Synthesis and X-ray structures of novel macrocycles and macrobicycles containing N,N-di(pyrrolylmethyl)-N-methylamine moiety: preliminary anion binding study.
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The [2 + 2] Schiff base condensation reactions between the newly synthesized dialdehyde, N,N-di(α-formylpyrrolyl-α-methyl)-N-methylamine), and ethylenediamine or p-phenylenediamine dihydrochloride readily afforded the 30- and 34-membered large size macrocycles in very high yields. Subsequent
Peripheral Templation Generates an M(II) 6 L4 Guest-Binding Capsule.
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Pseudo-octahedral M(II) 6 L4 capsules result from the subcomponent self-assembly of 2-formylphenanthroline, threefold-symmetric triamines, and octahedral metal ions. Whereas neutral tetrahedral guests and most of the anions investigated were observed to bind within the central cavity,
Barium titanate microparticles as potential carrier platform for lanthanide radionuclides for their use in the treatment of arthritis.
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Since the inception of radiation synovectomy, a host of radioactive colloids and microparticles incorporating suitable therapeutic radionuclides have been proposed for the treatment of arthritis. The present article reports the synthesis and evaluation of barium titanate microparticles as an
Specificity in template syntheses of hexaaza-macrobicyclic cages: [Pt(Me5-tricosatrieneN6)]4+ and [Pt(Me5-tricosaneN6)]4+.
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The racemic C3 hexadentate cage complex, [Pt(Me5-tricosatrieneN6)]Cl4 (1,5,9,13,20-pentamethyl-3,7,11,15,18,22-hexaazabicyclo[7.7.7]tricosa- 3,14,18-triene)platinum(IV) tetrachloride), was synthesised stereospecifically and regiospecifically from a reaction of the bis-triamine template
Effects of sodium taurocholate on the absorption of inhaled 99mTc-DTPA.
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OBJECTIVE
The effects of a natural surface-active agent, sodium taurocholate (NaTC), on the absorption of a hydrophilic solute, technetium-99m-labelled diethylene triamine pentaacetic acid (99mTc-DTPA), deposited at various sites within the airways were evaluated in this open, cross-over, and
Subcomponent self-assembly and guest-binding properties of face-capped Fe4L4(8+) capsules.
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A general method for preparing Fe(4)L(4) face-capped tetrahedral cages through subcomponent self-assembly was developed and has been demonstrated using four different C(3)-symmetric triamines, 2-formylpyridine, and iron(II). Three of the triamines were shown also to form Fe(2)L(3) helicates when the
Palladium(II) Complexation by p-Cyclophane Receptors. A Solution and Solid State Study.
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The coordination properties of the macrocyclic ligands 1,4,7,16,19,22-hexamethyl-1,4,7,16,19,22-hexaaza[9.9]-p-cyclophane (L1) and 1,4,7-trimethyl-19,22,28,31-tetraoxa-1,4,7,14,23-pentaaza[9.25]-p-cyclophane (L2) have been studied by means of potentiometric and (1)H and (13)C measurements in aqueous
Guest-directed supramolecular architectures of {W36} polyoxometalate crowns.
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The {W36} isopolyoxotungstate cluster provides a stable inorganic molecular platform for the binding of inorganic and organic guest molecules. This is achieved by a binding pocket formed by six terminal oxo ligands located in the central cavity of the all-inorganic cation binding host. Previously it
Regional deposition of mometasone furoate nasal spray suspension in humans.
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Nasal deposition studies can demonstrate whether nasal sprays treating allergic rhinitis and polyposis reach the ciliated posterior nasal cavity, where turbinate inflammation and other pathology occurs. However, quantifying nasal deposition is challenging, because in vitro tests do not correlate to
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