β-Cyclodextrin modified imidazole probe specific recognition of organic acids based on nuclear magnetic resonance.

Supramolecular interactions play an important role in molecular recognition. Cyclodextrins (CDs) are excellent hosts that are frequently utilized in the identification of chemical compounds. Proper modifications to CD can give it the ability to accurately recognize specific molecules.

Direct Observation of HOON Intermediate in the Photochemistry of HONO.

The photochemistry of nitrous acid (HONO), encompassing dissociation into OH and NO as well as the reverse association reaction, plays a pivotal role in atmospheric chemistry. Here, we report the direct observation of nitrosyl--hydroxide (HOON) in the photochemistry of HONO, employing matrix-isolation IR and UV-vis spectroscopy. Despite a barrier of approximately 30 kJ/mol, HOON undergoes spontaneous rearrangement to the more stable HONO isomer through quantum mechanical tunneling, with a half-life of 28 min at 4 K.

[Molluscicidal activity of methanol extracts of Jatropha curcas leaves against Ampullaria gigas].

Objective: To evaluate the molluscicidal activities of methanol extract of Jatropha curcas leaves against Ampullaria gigas.

Methods: Young snails, adult snails and eggs of Ampullaria gigas were treated with the methanol extract of J. curcas leaves at different doses for different time lengths and the molluscicidal effects of the extract were evaluated.