Extended Calix[4]arene-Based Receptors for Molecular Recognition and Sensing

Lo, Pik Kwan; Wong, Man Shing

doi:10.3390/s8095313

Cited by 54 publications

(18 citation statements)

References 90 publications

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“…Protocols for replacing the tbutyl group of the upper rim (R = t-Bu) in the parent calixarenes, which is a necessary blocking group during the base-catalyzed condensation of the phenol and formaldehyde, are also well developed. The variability in n, R, and the phenol substituent provides a rich class of hosts with diverse applications, including sensing [104][105][106]. Although a variety of different-sized resorcinarenes have been reported (n = 4, 5, 6, and 7), only the resorcin [4]arene 4 (n = 4) is accessible in high yield by the acid-catalyzed condensation of resorcinol and aldehydes.…”

Section: Common Classes Of Water-soluble Hostsmentioning

confidence: 99%

Van Der Waals Interactions and the Hydrophobic Effect

Gibb

2011

Chemosensors

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Section: Common Classes Of Water-soluble Hostsmentioning

confidence: 99%

Van Der Waals Interactions and the Hydrophobic Effect

Gibb

2011

Chemosensors

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“…Molecular recognition and inclusion complexation mechanism offer promising approaches for electrochemical sensing [27][28][29][30]45]. Calixarenes are cavity-shaped cyclic oligomers made up of phenol units linked via alkylidene groups [26,[46][47][48][49][50]. The lipophilic cavity of calixarene macromolecule provides a micro environment which an appropriately sized nonpolar drug molecule, or more often nonpolar parts, can enter to form an inclusion complex.…”

Section: Resultsmentioning

confidence: 99%

Novel Calixarene/Carbon Nanotubes Based Screen Printed Sensors for Flow Injection Potentiometric Determination of Naproxen

et al. 2018

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Novel sensitive disposable sensors have been introduced for potentiometric determination of naproxen (NAP) based on single‐walled carbon nanotubes‐polyvinyl chloride (SWNTs‐PVC) composite incorporated of calix[4]arene as host‐guest molecular recognition element. The electrode matrix composition was optimized on the basis of the nature and content of the sensing element, cationic sites, plasticizer and nanomaterial. Remarkable selectivity and sensitivity towards NAP was achieved in the concentration range from 10−8 to 10−2 mol L−1 with anionic Nernstian compliance −61.0±0.0 mV decade−1. Modification with calixarene and carbon nanotubes improved the sensors performance through formation of NAP‐calixarene inclusion complex and promotion of the electron‐transfer processes which enhance the potential stability, response time, and shelf lifetime of the sensor. The proposed sensors were successfully applied for the potentiometric assay of NAP in dosage formulation and biological fluids under batch and flow injection analysis (FIA) conditions with average recoveries agreeable with the reported official methods.

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“…Conjugates of calix[n]arenes, in particular, the calix[4]arene, have been studied for their ion and molecular sensing aspects in solution owing to the ease of controlled derivatization of the platforms both at lower and upper rims . Variations in the induced supramolecular aggregation of the conjugates of calix[4]arenes by an ion or a molecule have been reported .…”

Section: Introductionmentioning

confidence: 99%

Switching the Ion Selectivity from Fe³⁺ to Al³⁺ by a Triazole‐Appended Calix[4]arene‐Based Amphiphile^†

2018

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A triazole appended benzaldehydic lower rim derivative of calix [4]arene (L) has been synthesized and was thoroughly characterized. In CH 3 CN solution, the L showed greater sensitivity for Fe 3 + by a 5-fold increase in the absorbance and 37% quenching in the fluorescence intensity, by forming a 1:1 complex. The Fe 3 + induces aggregation in L as studied by microscopy. The Langmuir film formed at the air-water interface was characterized by pressure-area isotherm and Brewster angle micrographs, both in the presence and absence of metal ions. The Langmuir films of pure L, {L + Al 3 + } and {L + Zn 2 + } were transferred onto H-terminated Si-wafer and characterized using Atomic Force Microscopy, contact angle, Grazing Incidence Fourier Transform Infrared Spectrscopy and X-ray Photoelectron Spectroscopy. The study resulted selective binding of Al 3 + to the Langmuir film of L among the nine metal ions studied. Thus, the calix[4]arene-conjugate L is sensitive and selective to Fe 3 + in acetonitrile solution whereas to Al 3 + in Langmuir film and hence acts as an ion switch depending upon the physical state of L.designed in the light of the following aspects: (i) The calix [4] arene core is required for the presence of arene compartment and also to provide a platform in order to build the arms with [a] R.

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Extended Calix[4]arene-Based Receptors for Molecular Recognition and Sensing

Cited by 54 publications

References 90 publications

Van Der Waals Interactions and the Hydrophobic Effect

Van Der Waals Interactions and the Hydrophobic Effect

Novel Calixarene/Carbon Nanotubes Based Screen Printed Sensors for Flow Injection Potentiometric Determination of Naproxen

Switching the Ion Selectivity from Fe³⁺ to Al³⁺ by a Triazole‐Appended Calix[4]arene‐Based Amphiphile^†

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Extended Calix[4]arene-Based Receptors for Molecular Recognition and Sensing

Cited by 54 publications

References 90 publications

Van Der Waals Interactions and the Hydrophobic Effect

Van Der Waals Interactions and the Hydrophobic Effect

Novel Calixarene/Carbon Nanotubes Based Screen Printed Sensors for Flow Injection Potentiometric Determination of Naproxen

Switching the Ion Selectivity from Fe3+ to Al3+ by a Triazole‐Appended Calix[4]arene‐Based Amphiphile†

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Switching the Ion Selectivity from Fe³⁺ to Al³⁺ by a Triazole‐Appended Calix[4]arene‐Based Amphiphile^†