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This work presents synthesis and characterization of two cobalt‐based coordination polymers (CPs) prepared by using two positionally related pyridine‐2,6‐dicarboxamide fragment‐based ligands containing appended arylcarboxylic acid groups. While arylcarboxylate groups of ligands coordinate to the Co(II) ions to produce 2D CPs; the amidic N−H groups remain free and generate large cavities lined with hydrogen bonds. Such hydrogen bonding cavities based CPs were found to reversibly adsorb molecular iodine. The Lewis acidic Co(II) ions and metal‐coordinated labile solvent molecules in CPs promoted noteworthy heterogeneous catalysis for Friedel crafts reactions as well as multicomponent condensation reactions. [ABSTRACT FROM AUTHOR]

The present review discusses selected compounds based on polycyclic aromatic hydrocarbons (PAHs); mainly those containing naphthalene, anthracene, fluorene, pyrene, triphenylene and perylene rings. The focus has been placed to highlight both properties and applications of such PAH‐containing compounds in gelation, aggregation‐induced enhanced emission (AIEE) and mechanochromism as well as in fluorescence sensing of assorted analytes. [ABSTRACT FROM AUTHOR]

In this work, two Schiff-base-based chemosensors L1 and L2 containing electron-rich quinoline and anthracene rings were designed. L1 is AIEE active in a MeOH-H2O solvent system while formed aggregates as confirmed by the DLS measurements and fluorescence lifetime studies. The chemosensor L1 was used for the sensitive, selective, and reversible 'turn-on' detection of Al3+ and Ga3+ ions as well as Aspartic Acid (Asp). Chemosensor L2, an isomer of L1, was able to selectively detect Ga3+ ion even in the presence of Al3+ ions and thus was able to discriminate between the two ions. The binding mode of chemosensors with analytes was substantiated through a combination of 1H NMR spectra, mass spectra, and DFT studies. The 'turn-on' nature of fluorescence sensing by the two chemosensors enabled the development of colorimetric detection, filter-paper-based test strips, and polystyrene film-based detection techniques. [ABSTRACT FROM AUTHOR]