A simple calix[4]arene dialkyne diester(C4DE) was designed and synthesized in high yield (80%). C4DE was clicked onto a microstructured Au surface, and showed selective macroscopic recognition of cobalt picrate by orthogonal interactions, detected via contact angle measurements. The proposed wettability sensing device displays good specificity, is fast and easy to use, and should be suitable for the rapid detection of cobalt ions in environmental monitoring.In this paper, A simple calix[4]arene dialkyne diester (C4DE) is synthesized in a good yield of 80% and was modified on a Au surface via click chemistry to be a switchable wettability sensor for Co2+. We report the synthesis of a simple calix[4]arene dialkyne diester, which was successfully applied to a functional microstructured Au surface using a simple click reaction. The C4DE surface acts as a convenient and effective macroscopic sensor for orthogonal recognition of cobalt picrate [Co(pic)2].

In this study, a novel colorimetric sensor based on 1,3-alternate calix[4]arene-modified silver nanoparticles (Ag NPs) was synthesized. The functionalized Ag NPs were characterized by Transmission Electron Microscopy (TEM) and Infrared Spectroscopy (IR). It was observed that the Ag NPs synthesized had a high selectivity for Cu2+ ions with the detection limit of 2.5 × 10−6M. Based on the findings in this research, the 1,3-alternate calix[4]arene-modified Ag NPs was found to be useful for colorimetric detection of Cu2+ in solution. Moreover, the Ag NPs continued to grow and larger three-dimensional aggregates were formed with increasing concentration of Cu2+.

A new naphthol-appended calix[4]arene (NOC4) has been synthesized and characterized. NOC4 is clicked onto a microstructured Au surface and exhibits selective macroscopic recognition of metolcarb (MC) via contact angle measurements. The proposed wettability sensing device displays remarkable specificity and is fast and easy to use, which should be suitable for the rapid detection of MC in environmental monitoring.

A novel series of calix[4]arene derivatives were synthesized via a Pd-catalyzed Sonogashira coupling reaction from para-substituted iodobenzene and 25,27-dipropargyl-calix[4]arene. Fluorescence studies found that nitro-phenols clearly exhibited quenching effects on 2c. Moreover, we minimized the free energy of the complexes by theoretical calculations. As the result, the π–π stacking interactions take place between the 4-nitrophenol and calix[4]arene, which may lead to the significant fluorescence quench.A novel series of calix[4]arene derivatives were synthesized via a Pd-catalyzed Sonogashira coupling reaction from p-substituted iodobenzene and 25,27-dipropargylcalix[4]arene. Preliminary fluorescence study found that p-nitrophenol clearly exhibited quenching effects on 2c.

A series of novel 1,3-alternate thiacalixarene derivatives containing triazole groups were synthesized directly from a conformationally mixed intermediate in high yields using click chemistry. They were used as building blocks for supramolecular self-assembly architecture, and shown to be good Ag+ receptors. As confirmed by AFM, one of the compounds was found to form nanorod aggregates by silver ion binding.

Several water-soluble calix[4]arenes were synthesized via radical addition reaction between thiols and alkenes under UV lamp irradiation (λ = 365 nm) in good yields. The structures of these compounds synthesized herein were fully confirmed by 1H NMR, ESI-MS and elemental analysis.Several water-soluble calix[4]arenes were synthesized via radical addition reaction between thiols and alkenes under UV lamp irradiation (λ = 365 nm) in good yields. The structures of these compounds synthesized herein were fully confirmed by 1H NMR, ESI-MS and elemental analysis.