A novel calix[4]arene-based neutral semicarbazone receptor for anion recognition

Calixarene-based anionic receptors

“…After working for a month, the response was 93% of the original value. Complex formation of a series of 1,3-lower rimsubstituted calix [4]arenes 103a-103d having semiand thiosemicarbazone fragments with Cl -, Br -, I -, ClO 4 -, HSO 4 -, H 2 PO 4 -, and PF 6 -(tetrabutylammonium salts) was studied by 1 H NMR titration [87]. Receptor 103a was capable of recognizing HSO 4 -among other anions.…”

“…A highly efficient C 3v -symmetric receptor for halide ions, N 7 -hexahomotriazacalix [3]cryptand 87, was designed on the basis of azacalix [3]arene [80]. Compound 87 selectively binds halide ions (Cl -> Br -) over other anions (CH 3 87 Tables 7 and 8 show the structure of anionic calix- [4]arene receptors which were not considered in Sections 1-4 of the review.…”

A fluorescent turn-on probe for detection of HSO4− ion based on hydrolysis of BODIPY-derived Schiff base with chromogenic and fluorogenic dual signals

“…To date, many of the reported HSO 4 − anion receptors have relied on hydrogen-bonding motifs [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], which enables them to interact with HSO 4 − as well as a few other tetrahedral analytes such as HClO 4 , ClO 4 − , H 2 PO 4 − A c c e p t e d M a n u s c r i p t 6 temperature was raised to 50 0 C, and the mixture was stirred for an additional 2 h. The reaction mixture was cooled to room temperature and slowly poured into saturated aqueous NaHCO 3 under ice-cold conditions till no gas formed. After being warmed to room temperature, the reaction mixture was further stirred for 30 min and washed with water.…”

Dye responsive optical-electrochemical-wettability on a naphthalene-appended calix[4]arene clicking surface

“…By virtue of the lower detection limit and widely available instrumentation, fluorescenceresponsive chemosensors [1][2][3] offer a simple and rapid approach in monitoring of the target molecule in complex biological fluids. Similarly, real-time electrochemical sensing also plays a leading role in the analysis of the target molecules in complex biological environment [4,5].…”