SYNTHESIS AND COMPARATIVE COMPLEXATION STUDIES OF SCHIFF BASE DERIVATIVES OFp-TERTBUTYLCALIX[4]ARENE COPOLYMERS

Synthesis and binding properties of two polymeric thiacalix[4]arenes

“…From the results given in Table 1, it has been observed that oligomer 4a shows significant extraction ability toward alkali metal cations, whereas the other compounds (1-3) are ineffective for alkali metal cations in the liquid-liquid extraction systems (Fig. 1), and 4b can be a good adsorbent for alkali metal cations in the solid-liquid batchwise adsorption systems, very likely because of the structural and collective/cooperative behavior of thiacalix [4]arene moieties where the amide bridges and polymeric groups may also play an important role in this situation, which agreed with our previous results [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48]. Table 2 shows that MerrifieldÕs polymer 5 is ineffective for alkali metal cations in the solid-liquid systems.…”

“…As the applications of chemically modified calixarenes/thiacalixarenes, several researchers have attempted to prepare various extractants and chelating adsorbents for alkali/transition metal cations and anions, either by transforming into oligomeric/polymeric structures or by immobilizing them onto solid support materials [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51]. Although quite a number of reports exist on monomeric thiacalixarenes as mentioned above, those on the oligomeric/polymeric thiacalixarenes are very limited.…”

Transition metal cations extraction by ester and ketone derivatives of chromogenic azocalix[4]arenes

“…Despite the complexation of transition metal cations being favoured by the introduction of softer donor atoms, such as nitrogen [4,5], sulphur [6], or phosphorus [7], ligands with harder oxygen atoms also bind those cations. These calix[n]arenes bear phenoxy and carbonyl oxygens as the ligating sites, and include vic-dioximes [8,9], hydroxamates [10], amides [11], carboxylic acids [12], esters [13], and ketones [14].…”

Synthesis and properties of calix[4]crown-6 functionalized polymers

“…[14][15][16][17] It was reported that the copolymers containing pendant calix [4]arene and calix [4]crown units or polymer-supported calix [4]arenes were prepared and the cation ion-binding studies were performed using liquid-liquid and solid-liquid extraction methods. [18][19][20][21][22][23][24] Recently, in our previous work we have synthesized polyesters and polyurethane having calix [4]crown-5 and calix [4]crown-6 and have investigated their ionophoric properties for alkali and alkali earth metal cations. 25,26 In order to study the selectivity of polymeric calix [4] crown-metal ion complex, we prepared new polyamide and polyimide containing calix [4]crown-6 moiety by reacting calix [4]crown-6-2,4-bis(4-aminobutyl ether) with adipoyl chloride and 1,2,4,5-benzenetetracarboxylic dianhydride and performed liquid-liquid extraction experiments of various alkali and alkali earth metal.…”