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157432-87-6

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157432-87-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157432-87-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,4,3 and 2 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 157432-87:
(8*1)+(7*5)+(6*7)+(5*4)+(4*3)+(3*2)+(2*8)+(1*7)=146
146 % 10 = 6
So 157432-87-6 is a valid CAS Registry Number.

157432-87-6Relevant articles and documents

Preparation of the ferrocene-substituted 1,3-distal p-tert-butylcalix[4]arene based QCM sensors array and utilization of its gas-sensing affinities

Sayin, Serkan,Ozbek, Cebrail,Okur, Salih,Yilmaz, Mustafa

, p. 9 - 13 (2014)

The article describes the synthesis of the new ferrocene-substituted calix[4]arene derivative 4 as sensitive layer, and suggests that the immobilization of it is on a quartz crystal microbalance gold electrode via the drop-casting method in order to produce the calix[4]arene-based QCM sensor. In addition, sensor response of the calix[4]arene-based QCM sensor was investigated towards carbon dioxide (CO2) and carbon monoxide (CO). The sensing and selectivity studies show that the ferrocene-substituted calix[4]arene-based QCM sensor is an effective gas sensor toward both carbon dioxide and carbon monoxide.

Feeding a Molecular Squid: A Pliable Nanocarbon Receptor for Electron-Poor Aromatics

Bury, Wojciech,Cybińska, Joanna,Frydrych, Rafa?,Lis, Tadeusz,St?pień, Marcin

, p. 15604 - 15613 (2020)

A hybrid nanocarbon receptor consisting of a calix[4]arene and a bent oligophenylene loop ("molecular squid"), was obtained in an efficient, scalable synthesis. The system contains an electron-rich cavity with an adaptable shape, which can serve as a host

Fabrication of calixarene based protein scaffold by electrospin coating for tissue engineering

Cagil, Esra Maltas,Ozcan, Fatih,Ertul, Seref

, p. 5292 - 5298 (2018)

In this study, calixarene was synthesized by using different functional groups as p-tert-butyl- Calix[4]arene ester and amides. Calixarene nanofibers were produced by electrospin coating. Protein immobilization onto the calixarene nanofibers was carried out with human serum albumin (HSA). The maximum amount of binding on produced three different calixarene nanofibers (DE, 2-AMP and 3-AMP) was compared by using a fluorescence technique for protein analysis. Result showed that maximum binding amount was found to be as 177.85 mg cm-2 for 3-AMP surface. The protein binding was also characterized by using SEM, TEM, AFM and FT-IR. From obtained results, calixarene-albumin nanofiber was also fabricated by spin coating using 3-AMP which has ability max binding of protein.

Preparation of thermosensitive, calix[4]arene incorporated P(NIPAM-co-HBCalix) hydrogel as a reusable adsorbent of nickel(II) ions

Yan, Fanyong,Wang, Meng,Cao, Donglei,Guo, Shanshan,Chen, Li

, p. 2401 - 2408 (2013)

A calix-conjugated thermo-responsive hydrogel containing 15% tetra(5-hexenyloxy)-p-tert-butylcalix[4]arene (HBCalix), P(NIPAM-co-HBCalix), was used to remove nickel(II) ions from water. Both thermo-sensitive properties and the Ni2+-adsorption capabilities of the prepared P(NIPAM-co-HBCalix) hydrogels are investigated. Introduction of the monomer HBCalix considerably enhanced the adsorption of Ni2+ onto the hydrogel by chelation between hexenyloxy groups and metal ion. When HBCalix units capture Ni2+ and forms HBCalix/Ni2+ host-guest complexes, the lower critical solution temperature of the hydrogel shifts to a higher temperature due to both the repulsion between charged HBCali/Ni 2+ groups and the osmotic pressure within the hydrogel. Adsorption studies were carried out by varying contact time, counter ion and initial concentration of Ni2+. The evaluation of adsorption properties showed that the hydrogel exhibited better correlation with Langmuir isotherm model. P(NIPAM-co-HBCalix) could be used repeatedly with little loss in adsorption capacity by simply changing the environmental temperature. This kind of ion-recognition hydrogel is promising as a novel adsorption material for adsorption and separation of Ni2+ ions.

Synthesis of macrocyclic polyphenol resin by methylene crosslinked calix[4]arene (MC-[4]H) for the adsorption of palladium and platinum ions

Priastomo, Yoga,Morisada, Shintaro,Kawakita, Hidetaka,Ohto, Keisuke,Jumina

, p. 8015 - 8023 (2019)

A novel macrocyclic polyphenol resin, a calix[4]arene derivative, namely, a methylene crosslinked calix[4]arene (MC-[4]H), was successfully synthesised by demethylation of MC-[4]CH3. MC-[4]CH3 was prepared by crosslinking [4]CH3 with s-trioxane under acidic conditions. Methylation of calix[4]arene ([4]H) is strongly required to protect the oxygen atoms on the phenolic groups. It was found that the adsorption of palladium and platinum optimally occurred at low pH. The maximum loading capacity of palladium on the resin was found to be 0.41 mol kg-1 while that of platinum was 0.23 mol kg-1. The stoichiometries of metal ions were found to be 5:1 of the calix[4]arene unit in MC-[4]H to Pd(ii) and 3:1 of that in MC-[4]H to Pt(iv), respectively.

Synthesis of p-tert-butylcalix[4]arene derivatives with trans-alkyl substituents on opposite methylene bridges

Simaan, Samah,Biali, Silvio E.

, p. 3634 - 3639 (2003)

Reaction of the bis(spirodiene) calixarene derivative 9 possessing exocyclic double bonds with tetraethylammonium fluoride or chloride afforded bis(spirodienone) calixarene derivatives substituted by the corresponding halogen atoms (11 and 12). Reaction of 9 with alkyl cuprates yielded in one step p-tert-butylcalix[4]arene derivatives with opposite methylene groups substituted in a trans fashion by identical alkyl substituents (methyl, ethyl, or isopropyl). The isopropyl derivative 16 displayed the largest cone-to-cone inversion barrier of the series.

Delayed lanthanide luminescent Tb(III) complexes formed from lower rim amide functionalised calix[4]arenes

Lincheneau, Christophe,Quinlan, Eoin,Kitchen, Jonathan A.,McCabe, Thomas,Matthews, Susan E.,Gunnlaugsson, Thorfinnur

, p. 869 - 880 (2013)

The synthesis and the photophysical studies of a new generation of time resolved luminescent systems based on calix[4] arenes alkylated at the lower rim, capable of hosting lanthanide (III) ions such as terbium and sensitising its emission, are described. Two series of ligands were designed to provide an ideal cavity to host terbium (Tb(III)) and were synthesised in high yields following two novel approaches. The tetra-alkylation, which was achieved in one step using with piperidino- and morpholino-acetamide pendant arms, provides eight donor atoms forming a binding 'pocket' at an ideal distance from the metal core to favour the sensitisation via the antenna effect. Of the two ligand series developed, compounds 3 and 4 possess a short spacer between the calix and the amide receptor site. The second series of ligands 6-7, designed with longer pendant amide arms, was synthesised from 2 in two steps through the ester analogue 5. The crystal structure of 3 (and 6 as shown in Supporting Information, available online) is presented. The synthesis and the photophysical studies of the four resulting complexes 3.Tb, 4.Tb, 6.Tb and 7.Tb are described in detail and in each case, successful sensitisation of the terbium emission occurred upon excitation of the phenolic scaffold of the calixarene.

Synthesis, spectral characterisation and thermal behaviours of some new p-tert-butylcalix[4]arene and calix[4]arene-esters containing acryloyl groups

?zkinali, Sevil,Kocaokutgen, Hasan

, p. 70 - 78 (2013)

The mono-, di-, tri-, and tetra-acryloyl esters of p-tert-butylcalix [4]arene and calix[4]arene were synthesised by reacting acryloyl chloride with sodium salts of p-tert-butylcalix[4]arene and calix[4]arene in THF. The structures of these compounds were characterised by IR, UV-VIS, 1H NMR, and 13C NMR. Thermal behaviour of the compounds were also examined by means of differential thermal analysis (DTA), thermogravimetry (TG), and derivative thermogravimetry (DTG).

Thermodynamic and Kinetic Studies for Adsorption of Reactive Blue (RB-19) Dye Using Calix[4]arene-Based Adsorbent

Junejo, Ranjhan,Memon, Shahabuddin,Memon, Fakhar N.,Memon, Ayaz Ali,Durmaz, Fatih,Bhatti, Asif Ali,Bhatti, Ashfaque Ali

, p. 3407 - 3415 (2019)

A current study demonstrates the removal of Reactive Blue 19 (RB-19) from industrial wastewater by synthesizing p-piperdinocalix[4]arene-immobilized silica resin (PASR). The surface morphology and functional group analysis were performed with scanning electron microscopy and Fourier transform infrared spectroscopy. The dye removal efficiency of PASR was analyzed through adsorption studies. Different parameters were optimized such as the pH value of dye, amount of resin, concentration of dye, and effect of electrolyte on adsorption. The adsorption mechanism was analyzed with Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherms. It was found that experimental data follow the Freundlich isotherm, which suggests multilayer adsorption. The column adsorption study was also evaluated by breakthrough and Thomas models. The Thomas model rate constant kTH (cm3 mg-1 min-1) and maximum solid phase concentration was found to be qo = 2.702 mg·g-1. The thermodynamic study reveals that the adsorption process is exothermic and spontaneous in nature. The kinetic study suggests that the adsorption process follows the pseudo-second-order kinetic model.

Surface-enhanced micro-raman detection and characterization of calix[4]arene-polycyclic aromatic hydrocarbon host-guest complexes

Leyton,Sanchez-Cortes,Campos-Vallette,Domingo,Garcia-Ramos,Saitz

, p. 1009 - 1015 (2005)

Surface-enhanced micro-Raman spectroscopy (micro-SERS) was used to detect traces of the hazardous pollutant polycyclic aromatic hydrocarbons (PAHs) pyrene and benzo[c]phenanthrene deposited onto a calix[4]arene-functionalized Ag colloidal surface. High spectral reproducibility and very low molecular detection limits (10 8 M) were obtained by using 25,27-carboethoxy-26,28- hidroxy-p-tertbutylcalix[4]arene as host molecule. Films of immobilized aggregated Ag nanoparticles, obtained by chemical reduction with hydroxylamine, were prepared by direct adhesion on a glass surface. The influence of the aggregation degree of the initial Ag nanoparticles on the micro-SERS detection effectiveness was checked. Different relative concentrations of the host (calixarene receptor) and the guest (PAHs) were attempted in order to optimize detection of the pollutant. The obtained results indicated that the detection limit is much lower in the case of benzo[c]phenanthrene than in pyrene when exciting with the 785 nm line of a diode laser. A detailed interpretation of the Raman spectra was accomplished in order to obtain more information about the interaction mechanism of the host-guest complex, which could be useful in the future for the design of powerful-detection systems.

Synthesis and complexation properties of N,N'-bis(calix[4]arenoxyacetyl) hydrazine derivative

Alekseeva, Elena A.,Luk'Yanenko, Aleksandr P.,Gren, Andrei I.

, p. 263 - 264 (2012)

Heating of p-tert-butylcalix[4]arene bearing acethydrazide moiety at the lower rim in MeCN or PriOH (EtOH) affords the corresponding N,N'-bis(calix[4]arenoxyacetyl)hydrazine derivative. The hydrazinolysis of mono(methoxycarbonylmethoxy)-p-tert-

Calix[4]arene-based supramolecular gels with unprecedented rheological properties

Cai, Xiuqin,Liu, Kaiqiang,Yan, Junlin,Zhang, Helan,Hou, Xiaoyu,Liu, Zhang,Fang, Yu

, p. 3756 - 3761 (2012)

A novel calix[4]arene-based dimeric-cholesteryl derivative was synthesized, and its gelation behaviour in thirty organic solvents was investigated. It has been shown that the compound cannot gel any of the pure solvents tested. However, it gels a mixture of solvents n-decane and acetonitrile efficiently, provided the volume ratio of the two solvents in a mixture is within 9:1 and 3:2. AFM and SEM measurements revealed that the molecules of the compound aggregate into micro-/nano-rods first, then fine fibers, and then thick fibers, and finally networked structures in the mixture solvents. Interestingly, the gel with a composition of 1 to 1 (Vn-Decane:VAcetonitrile) and 2.5% (w/v) of the compound exhibits super-smart and fully reversible thixotropic properties, a phenomenon never reported before. Furthermore, the mechanical strength of the gel could be easily adjusted by altering the concentration of the gelator and the composition of the mixture solvents. Further interrogation of the gel revealed that structurally the gel is a gel-emulsion with acetonitrile dispersed in n-decane, a rarely found O/O (oil in oil) gel-emulsion which may find uses in the templated preparation of low-density materials with complicated internal structures.

Analytical evaluation of Cu2+ selective behavior of calix[4]arene derivative

Qazi, Mansoor Ahmed,Qureshi, Imdadullah,Memon, Shahabuddin

, p. 1703 - 1711 (2011)

The present article describes the solvatochromic effect including solvent system selection, time study and a detailed complexation study along with exploration of extraction properties of 5,11,17,23-tetrakis[(diethylamino) methyl]-25,26,27,28-tetrahydroxycalix[4]arene (4) that bears nitrogen atom as a donor group available for chelating metal ions. Complexation properties of 4 toward selected transition metal ions have been investigated by UV-visible and fluorescence spectroscopies. The% efficiency of 4 toward selected transition metal ions was found in order Cu2+> Ni2+> Hg 2+> Zn2+> Co2+> Cd2+> Pb2+. It has been noticed that 4 is not only proved to be an efficient Cu2+ selective chromoionophore but also possesses an effective extraction property for transferring Cu2+ ions from an aqueous to dichloromethane layer. The FT-IR spectroscopic method has also been applied for further confirmation of the complexation phenomenon of 4 with Cu2+ ion and found adequate. Springer Science+Business Media, LLC 2009.

Easy and selective method for the synthesis of various mono-O- functionalized Calix[4]arenes: De-O-functionalization using TiCl4

Bois, Joackim,Espinas, Jeff,Darbost, Ulrich,Felix, Caroline,Duchamp, Christian,Bouchu, Denis,Taoufik, Mostafa,Bonnamour, Isabelle

, p. 7550 - 7558 (2010)

An efficient and selective method for the monofunctionalization of p-tert-butylcalix[4]arene is described. A mono-de-O-functionalization of disubstituted p-tert-butylcalix[4]arenes using titanium tetrachloride was developed to synthesize a series of monosubstituted p-tert-butylcalix[4]arenes with the pendant functions being ethoxycarbonylmethyloxy, 3- ethoxycarbonylpropyloxy, cyanomethyloxy, 3-cyanopropyloxy, 4-bromobutyloxy, 3-hydroxypropyloxy, propyloxy, 2-methylpropyloxy, 3-butynyloxy, and 3-cyanopropyloxy groups. The reaction mechanism of the formation of 5,11,17,23-tetra-tert-butyl-26,27,28-trihydroxy-25-(3-ethoxycarbonylpropyloxy) calix[4]arene was studied by 1H NMR and GC/mass spectroscopy monitoring. Reaction of TiCl4 with the disubstituted p-tert-butylcalix[4]arene produced the corresponding dioxocalix[4]arene titanium dichloride complex, which undergoes elimination of ethyl 4-chlorobutyrate, leading to a trioxocalix[4]arene titanium dichloride complex and to monosubstituted calix[4]arene after hydrolysis. These two complexes were also synthesized, isolated, and fully characterized.

Kaemmerer,Happel

, p. 1199,1200,1201,1202 (1978)

Synthesis of the porphyrin-calix[4]arene conjugates via Pd-catalyzed amination and their evaluation as fluorescent chemosensors

Yakushev, Alexei A.,Averin, Alexei D.,Sakovich, Maria V.,Vatsouro, Ivan M.,Kovalev, Vladimir V.,Syrbu, Sergei A.,Koifman, Oskar I.,Beletskaya, Irina P.

, p. 1551 - 1562 (2019)

The synthesis of the porphyrin-calix[4]arene conjugates was carried out using the Pd(0)-catalyzed amination of Zn(II) meso-(3-bromophenyl)porphyrinate with bis(3-aminopropoxy)substituted calix[4]arenes (in cone and 1,3-alternate conformations). One of the conjugates was demetalated to give free porphyrin base derivative. The investigation of the fluorescence of the conjugates was studied in the presence of 18 metal perchlorates. The zinc porphyrinate derivatives were found to quench fluorescence in the presence of Cu(II), Al(III) and Cr(III) cations as well as on protonation. Metal-free conjugate was shown to act as a molecular probe for Zn(II), Cu(II) and Cd(II) cations due to strong and different changes of the emission caused by these metals.

Synthesis of new anthracene-substituted calix[4]triazacrown-5 as highly sensitive fluorescent chemosensor and extractant against hazardous dichromate anion

Sayin, Serkan

, p. 1716 - 1724 (2021)

A new fluorogenic anthracene functionalized calix[4]triazacrown-5 (Ant-AzClx) was successfully synthesized using a simple Schiff’s base reaction. The 1H-NMR, 13C-NMR, ESI-MS, and elemental analysis techniques were performed to characterize its structure. Excited at 370 nm, Ant-AzClx reveals excimer emission at 418 nm. Therefore, its anion binding properties were investigated against F?, HCO3?, H2PO4?, NO3?, Cr2O72?, and SO42? ions. When hazardous dichromate anion was introduced into medium, the fluorescence intensity of Ant-AzClx was markedly quenched. The binding constant, stoichiometry, the detection limits and Stern–Volmer equation for the complex formed between Ant-AzClx and Cr2O72? ion were determined. Furthermore, the 1H-NMR technique was also performed to assess the mechanism of the complex (Ant-AzClx@Cr2O72?). Apart from its excellent fluorescent chemosensor properties for selective and sensitive recognition of Cr2O72? ion, Ant-AzClx was used as an efficient extractant towards dichromate anion. The extraction results indicated that Ant-AzClx exhibited high extraction capability, leading to it being a promising extractant for the removal of dichromate anions from water.

Enzyme-responsive supramolecular nanovalves crafted by mesoporous silica nanoparticles and choline-sulfonatocalix[4]arene [2]pseudorotaxanes for controlled cargo release

Sun, Yu-Long,Zhou, Yue,Li, Qing-Lan,Yang, Ying-Wei

, p. 9033 - 9035 (2013)

Mesoporous silica nanoparticles (MSNs) have been surface-functionalized with choline moieties encircled by sulfonatocalix[4]arenes. Two enzyme cleavable sites are incorporated in the stalks for specific enzymes to regulate the release of loaded cargos from MSNs. These gated materials show a clear enzymatic response and proven orthogonality.

Absorption of chlorinated hydrocarbons dissolved in water with pellets made of p-tert-butylcalix[4]arene and silica gel

Morohashi, Naoya,Shibata, Ozora,Hattori, Tetsutaro

, p. 1412 - 1413 (2012)

Powdery crystals of p-tert-butylcalix[4]arene (1) pelletized using silica gel as a binder absorb chlorinated hydrocarbons from saturated aqueous solutions by forming inclusion complexes with compound 1.

Calix[4]arene based highly efficient fluorescent sensor for Au3+ and I-

Memon, Shahabuddin,Bhatti, Ashfaque Ali,Bhatti, Asif Ali,Ocak, ümmühan,Ocak, Mira?

, p. 1507 - 1515 (2015)

This approach disclose the selective fluorogenic ion sensing ability of 5,11,17,23-tetratertbutyl-25,27-bis((2hydroxynaphthylimino)1,2-ethylenediaminecarbonylmethoxy)-26,28 dihydroxycalix[4]arene (C4NSB). Binding property of receptor probed by using selected various cations and anions with conferring of results that demonstrates 'turn-off' fluorescence response and significantly high chromogenic selectivity toward Au3+ and I-. Furthermore, selective nature of receptor was investigated in the presence of different co-existing competing ions. The limit of detection (LOD) for Au3+ and I- was determined as 1.5∈×∈10-5 and 4.5∈×∈10-6 M respectively. Receptor C4NSB form (1:1) stoichiometric complex with both ions and their binding constants were calculated as 8.0∈×∈102 for Au3+ and 15.6∈×∈102 M-1 for I-. Complexes were also characterized through FT-IR spectroscopy.

Extraannular fluorinated calixarenes: Regiospecificity of the deoxofluorination reactions of bis(spirodienol) derivatives

Agbaria,Woehnert,Biali

, p. 7059 - 7066 (2001)

A new route for the partial displacement of OH groups of p-tert-butylcalixarene via spirodienol derivatives is described. NaBH4 reduction of the bis(spirodienone) calixarene derivatives 2a-2c afforded the corresponding bis(spirodienols) 3a-3c in stereospecific fashion. 1H NMR NOESY spectroscopy indicated that in the case of 2a, the reaction proceeds by attack at the exo face of the two carbonyls (the face located anti to the spiro C-O bond). The spirodienols readily revert to p-tert-butylcalix[4]arene when heated. The reaction of 3a with the deoxofluorinating agent DAST (Et2NSF3) afforded a mixture of extraannular substituted calixarenes possessing one or two fluoro-substituted dehydroxylated rings. The bisfluorinated calixarene 6a adopts in the crystal a conformation (1,3-alternate) similar to that adopted in solution by the di-dehydroxylated calixarene 6b. An experiment conducted with a selectively deuterated spirodienol derivative indicated that the deoxofluorination reaction involves regiospecific nucleophilic attack at the γ position of the pentadienol subunit.

A novel calix[4]arene-based dimeric-cholesteryl derivative: Synthesis, gelation and unusual properties

Wu, Ying,Liu, Kaiqiang,Chen, Xiangli,Chen, Yongping,Zhang, Shaofei,Peng, Junxia,Fang, Yu

, p. 639 - 649 (2015)

A calix[4]arene-based dimeric-cholesteryl derivative with naphthalene in the linkers (C2N2C) was designed and synthesized. The gelation behaviors of the compound in 36 liquids were evaluated. It was demonstrated that C2N2C could gel 16 of the liquids tested, which include both polar and apolar liquids. SEM and AFM studies revealed that the morphologies of the gel networks are dependent on the concentrations of C2N2C and the nature of the liquids under study. Importantly, rheological studies revealed that the gel of the compound in benzene possesses sensitive, fast and fully reversible thixotropic property. More importantly, the Tgel of the C2N2C/benzene gel could be at least more than 60 degrees higher than the boiling point of benzene when the gelator concentration is greater than 6% (w/v), a result never reported before. CD measurements revealed the chiral nature of the assemblies of the gel networks. Further investigation by AFM measurements confirmed the right-hand helical structures of the gel networks of C2N2C/benzene gel. As anticipated, hydrogen bonding and π-π stacking are the two main driving forces for the formation of the gels.

Reversible coloring/decoloring reactions of thermochromic leuco dyes controlled by a macrocyclic compound developer

Chaodongbung, Tawatchai,Kaewtong, Chatthai,Pattavarakorn, Datchanee,Saenkham, Audchara,Sriphalang, Sanguansak,Wanno, Banchob

, (2022/03/31)

In this study, we examine macrocyclic compounds to determine whether they can provide a safer replacement and stable complex for BPA in thermochromic dyes. To achieve this objective, a series of macrocyclic compounds, Methyl-N-benzylhexahomotriazacalix[3]arene (MeAC3), p-Chloro-N-benzylhexahomo-triazacalix[3]arene (ClAC3), α-Cyclodexdrin (α-CD), β-Cyclodexdrin (β-CD), p-tert-Butylthiacalix[4]arene (TC4), Calix[4]arene (C4), and Resorcin[4]arene (RC4), were synthesized. Among these macrocyclic compounds, RC4 was determined to be the most appropriate candidate to replace BPA as the developer material used in thermochromic dyes. In tests of prepared thermochromic dyes, RC4 had results similar to those of BPA, achieving the best protonation/deprotonation equilibria and providing a dark contrast with the thermochromic dye. DFT calculations also showed stable complexes between RC4 and CVL via hydrogen-bond interactions.

Inclusion complexes of water-soluble calix[n]arenes with quercetin: preparation, characterization, water solubility, and antioxidant features

Ozyilmaz, Elif,Arpaci, Pembegul Uyar,Sayin, Serkan,Yildirim, Ayse,Ascioglu, Sebahat,Gok, Emine

, p. 201 - 209 (2022/01/20)

This study focuses on the construction of two new inclusion complexes of quercetin with p-sulfonatocalix[4]arene-tetracarboxylic acid and/or p-sulfonatocalix[8]arene-octacarboxylic acid, so that the drug gets soluble in an aqueous media. The structures of

Mathematical modeling studies for the adsorptive removal of ciprofloxacin drug from water samples using functionalized silica resin

Elik, Mustafa,Jalbani, Nida Shams,Junejo, Ranjhan,Kaya, Savas,Serdaroglu, Goncagül

, (2022/02/14)

The current research demonstrates the adsorptive removal of ciprofloxacin antibiotic drug from pharmaceutical wastewater samples using functionalized silica (FS) resin through batch adsorption experiments. The adsorption experiments were performed under the optimized parameters such as pH effect, FS-resin amount, ciprofloxacin concentration, equilibrium time and temperature. Results demonstrate that the maximum adsorption of ciprofloxacin was achieved at pH (6.5), while the effective resin dose was 20?mg?L?1. The Langmuir and Freundlich models were applied on equilibrium data, and it has been observed that the adsorption was best fit to the Freundlich model with a good correlation coefficient (R2 = 0.999). Moreover, the thermodynamic and kinetic parameters show that the adsorption of ciprofloxacin is endothermic and spontaneous in nature followed by pseudo-second-order kinetic model. To explore the efficiency of resin, the real wastewater samples were collected and it has been observed that resin has better potential to treat pharmaceutical effluents. Furthermore, the FS-resin and ciprofloxacin interaction were analyzed at a molecular level through quantum chemical calculation. Graphical abstract: [Figure not available: see fulltext.]

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