A modified graphene oxide containing aza-9-crown-3 ether units covalently anchored has been prepared; aqueous suspensions of this material in the presence of Li(+), Na(+) and K(+) cations exhibit enhanced electrochemical response, enhanced photoinduced charge separation and longer lifetimes, facts that can be attributed to stabilization of electrons on graphene oxide by the nearby alkali metal cation-azacrown complexes.

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The development of original strategies for the preparation of indole derivatives is a major goal in drug design. Herein, we report the first straight access to indoles from anilines and ethylene glycol by heterogeneous catalysis, based on an acceptorless dehydrogenative condensation, under noninert conditions. In order to achieve high selectivity, a combination of Pt/AlO and ZnO have been found to slowly dehydrogenate ethylene glycol generating, after condensation with the amine and tautomeric equilibrium, the corresponding pyrrole-ring unsubstituted indoles.

Highly concentrated: The title reaction proceeds to afford a rare type of 15-membered polyether macrocycle in up to 84 % yield (R1=alkyl, alkoxy, O-allyl, OCH2CH2Ph; R2=alkyl, Ph; R3=H, Me, Et). This nontemplated macrocyclization is performed in a single pot under high concentration and precludes the usual polymerization

In the course of the synthesis of new fluorophores for molecular recognition an experimental (1H NMR) and theoretical (DFT) study of the ring‐chain isomerism of 3‐(pyridin‐2‐yl)[1,2,3]triazolo[1,5‐a]quinoline derivatives (A) into 2‐([1,2,3]triazolo[1,5‐a]pyridin‐3‐yl)quinoline derivatives (B) has been carried out. The rearrangement is influenced by steric and electronic effects of the substituents present on the quinoline ring. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)