Brine shrimp lethality of a new series of 16 to 26-membered macrocycles of iron(II) containing tetraaza groups and prepared by the template condensation reaction of diacarboxylic acids (malonic, succinic, glutaric or adipic) with 2,6-diaminopyridine and diethylenetriamine in 1:2:2 molar ratios have been studied. Structures and bonding of the macrocyclic complexes have been proposed based on ele...

Carbohydrate receptors with a chiral framework have been generated by combining a tetra-aminopyrene and a C3-symmetrical triamine via isophthalamide spacers bearing water-solubilising groups. These "synthetic lectins" are the first to show enantiodiscrimination in aqueous solution, binding N-acetylglucosamine (GlcNAc) with 16 : 1 enantioselectivity. They also show exceptional affinities. GlcNAc...

We report the Bose-Einstein condensation (BEC) of the most magnetic element, dysprosium. The Dy BEC is the first for an open f-shell lanthanide (rare-earth) element and is produced via forced evaporation in a crossed optical dipole trap loaded by an unusual, blue-detuned and spin-polarized narrowline magneto-optical trap. Nearly pure condensates of 1.5 × 10(4) (164)Dy atoms form below T = 30 nK...

Dithiocarbamates are highly versatile, mono-ionic chelates that form stable complexes with many transition metals and main group elements. Ccmplexes of cobalt(II) piperidine dithiocarbamate and diamines such as Ethylene diamine, Diethylene triamine and Triethylene tetramaine have been synthesised . The complexes have been characterized by IR , UV-Vis and EPR spectral studies , Thermal and magne...

In this paper, rapeseed oil was modified with diethylenetriamine to obtain a vegetable oil-derived pour point depressant (PPD), which used reduce the and improve flowability of crude (from Changqing Oilfield), has high content paraffin. Various instruments such as differential scanning calorimetry (DSC), polarized optical microscopy (POM), viscometer were investigate performance PPD. The result...

A styrylpyridine-containing cyclophane with diethylenetriamine linkers is presented as a host system whose association representative nucleotides was examined photometric and fluorimetric titrations. The spectrometric titrations revealed the formation of 1:1 complexes log Kb values in range 2.3–3.2 for pyrimidine TMP (thymidine monophosphate), TTP triphosphate) CMP (cytidine monophosphate) 3.8–...

Two extractants, N,N′-((octylazanediyl)bis(ethane-2,1-diyl))dioctanamide (LI) and N,N′-((octylazanediyl)bis(ethane-2,1-diyl))di-2-methylheptanamide (LII), have been synthesised in two steps starting from diethylenetriamine involving a peptide coupling step. The efficiency selectivity of the extractants dodecane/octanol (95/5 v/v) toward extraction uranium sulfate media investigated showing that...