Solutions of KCN in 0.1 mol/liter NaOH, stored for six months at 4 degrees C, were unchanged as determined by silver titration and color development with pyridine-pyrazalone reagent. At room temperature the cyanide concentration of such solutions decreased by 0.079% per day (half life = 880 days) and the extent of color development changed in direct proportion to the change in silver titer. Rub...

Agglomerated cork composites production has been arising as an alternative eco-friendly to stoppers use and attracts interest create sustainable products materials. A cork-bamboo-latex composite was developed by compression-molding the interaction between three interfaces well their mechanical properties were evaluated density measure, immersion test, FTIR, compression microbial analysis aiming...

A tight [2]rotaxane with two chromophores as stoppers is described, in which the macrocycle is able to reversibly move by tuning of base. This moving process can result in intramolecular photo-induced electron transfer (PET), changing the photo-physical properties.

The aim of this paper was to evaluate the potential using near-infrared (NIR) spectroscopy and multivariate analysis as a rapid tool non-destructively determine presence surface treatments applied cork stoppers. Density dimensions 6 closure varieties were characterized extraction force measured on those produced for still wines. Cork stoppers also analyzed hand-held NIR Raman spectrometers. Sof...

A pillar[5]arene decaamine has been synthesized and revealed to encapsulate linear diacids in neutral, alkaline, and acidic conditions, driven by the hydrophobic and electrostatic interactions, to give rise to pseudo[2]rotaxanes. Ion pair-bonded stoppers can further lock the diacids to generate stable water soluble [2]rotaxanes.

A series of Sauvage-type porphyrinorotaxanes containing [60]fullerene stoppers have been synthesized by a convergent route. Photoinduced energy transfer and electron-transfer reactions in these rotaxanes yield long-distance charge-separated radical-pair states, whose lifetimes in solution at ambient temperatures are as high as 32 mus, depending on the distance between the fullerene and zinc por...

Permanently interlocked [2]rotaxane ligands can be created by capping a pyridine terminated [2]pseudorotaxane with terpyridine containing stoppers. The robust nature of the resulting [2]rotaxane ligand allows coordination to inert metals such as Ru(II) not possible under standard self-assembly conditions.

Stable pillar[5]arene-containing [2]rotaxane building blocks with pentafluorophenyl ester stoppers have been efficiently prepared on a multi-gram scale. Reaction of these various nucleophiles gave access to wide range [2]rotaxanes amide, or thioester in good excellent yields. The rotaxane structure is fully preserved during chemical transformations. Actually, the addition-elimination mechanism ...