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Unique Lewis acid/base liquid coordination catalysts were compared to the known super acidic ionic liquid chloroaluminates and found to have higher catalytic activity in the alkylation of benzene.

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In our efforts to overcome the limitations in using ionic liquids (ILs) as homogeneous catalysts, we prepared a heterogeneous analog by loading 10−40 wt% [HN 222 ][Al 2 Cl 7 ] ([HN 222 ] + = triethylammonium) onto Fe 3 O 4 nanoparticles (NPs) to obtain free-flowing solid catalysts. Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX), and Brunauer−Emmett−Teller (BET) surface area analysis of 20% [HN 222 ][Al 2 Cl 7 ]/Fe 3 O 4 , all confirmed loading of the IL. Catalytic performance was assessed with the alkylation of benzene with benzyl chloride reaction, and 20% [HN 222 ][Al 2 Cl 7 ]/Fe 3 O 4 was found to be the best catalyst with 100% conversion and 77% product selectivity.The catalyst was also found to be active for alkylation of other substrates such as toluene and o-, m-, and p-xylene. Utilizing a magnet for separation, the catalyst could be recycled and reused for five runs without loss of catalytic activity.

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A series of novel fluoroionophore bearing derivatives of benzo-15-crown-5 were synthesized by the amination of benzo-15-crown-5 followed by condensation with different quinones in the presence of titanium tetrachloride (TiCl4 ) and 1,4-diazabicyclo-[2.2.2]octane. The compounds were characterized by infrared, (1) H and (13) C nuclear magnetic resonance, mass spectroscopy and elemental analysis. Absorption and fluorescence spectral characteristics of these compounds were studied. It was observed that the anthraquinone derivative was acting as an Hg(2+) ion sensor.

New crown ether‐functionalized benzimidazoles was designed and synthesized via formylation of dibenzo‐18‐crown‐6 followed by condensation with different o‐phenylene diamines. The complexation properties of crown ether‐functionalized benzimidazoles with various metals (K+, Ca2+, Ba2+, Co2+, Hg2+) were examined using UV–vis spectroscopy. Hg2+ showed a well‐defined peculiar absorption maximum at 366 nm exclusively. All these newly synthesized compounds were screened for antifungal activity against Aspergillus niger and Aspergillus oryzae, respectively.

A process for exclusive mono-Michael addition of active methylene compounds to conjugated esters, nitriles and ketones is developed. An ionic liquid-mediated reaction is carried out at room temperature. A reaction carried out at 60 °C resulted in a double-addition. A mechanism is proposed and supported by P31 and DOSY NMR analysis.