Porous NiO nanotetrahedrons and elongated irregular nanoparticles were synthesized, exhibiting superior gas-sensing behavior toward formaldehyde with high gas sensitivity and stability.
One‐pot three‐component condensation of α‐ or β‐naphthol with 1,3‐dicarbonyl compounds and aromatic aldehydes affords a variety of biologically interesting benzo[c]xanthene derivatives.
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