Off–on BODIPY-based chemosensors for selective detection of Al<sup>3+</sup> and Cr<sup>3+</sup>versus Fe<sup>3+</sup> in aqueous media
作者:Andrea Barba-Bon、Laura Calabuig、Ana M. Costero、Salvador Gil、Ramón Martínez-Máñez、Félix Sancenón
DOI:10.1039/c3ra46845c
日期:——
Two new off–on BODIPY-based chemosensors that are highly sensitive for trivalent cations in aqueous solutions are described. Compound 2 exhibits selective sensing of Al3+ and Cr3+ versus Fe3+ through two different channels (UV-vis and fluorescence).
Reaction of aluminum cluster ions with oxygen and nitrous oxide: Energetics and dynamics of cluster oxidation
作者:Stephen A. Ruatta、Scott L. Anderson
DOI:10.1063/1.455522
日期:1988.7
We report a study of the absolute cross sections, reaction threshold energies, and product branching ratios for interactions of aluminum cluster ions (Al+n, n=1–9) with O2 and N2O. Most of the reactions are observed to have collision energy thresholds which are attributed to activation barriers or bottlenecks. At collision energies above threshold, exoergic oxidation of the cluster ions occurs, and the resulting energy release causes extensive fragmentation to yield a variety of product ions. Comparison of threshold behavior for different product channels suggests that in addition to the dominant oxidation reactions, the clusters undergo Al abstraction, O2–Al+ exchange, and collision induced dissociation.