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Articles de revues sur le sujet « Calixareni »

Auteur : Grafiati

Publié le 10 mars 2023

Mis à jour le 31 juillet 2025

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1

Jose, Princy, and Shobana Menon. "Lower-Rim Substituted Calixarenes and Their Applications." Bioinorganic Chemistry and Applications 2007 (2007): 1–16. http://dx.doi.org/10.1155/2007/65815.

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This review discusses in detail “calixarenes” since their discovery as by-products of the phenol formaldehyde bakelites till the present scenario wherein calixarene has assumed a new dimension in the field of supramolecular chemistry. Extensive literature exists for calixarenes; but herein we have tried to concentrate on the different lower-rim modified calixarenes with their potential applications. An attempt has also been made to critically evaluate the synthesis procedures for different lower-rim substituted calixarenes.

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Mironova, Diana, Vladimir Burilov, Farida Galieva, et al. "Azocalix[4]arene-Rhodamine Supramolecular Hypoxia-Sensitive Systems: A Search for the Best Calixarene Hosts and Rhodamine Guests." Molecules 26, no. 18 (2021): 5451. http://dx.doi.org/10.3390/molecules26185451.

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A potential hypoxia-sensitive system host-guest complex of three calixarenes (including two with four anionic carboxyl and sulphonate azo fragments on the upper rim and a newly synthesized bis-azo adduct of calixarene in the cone configuration with azo fragments on the lower rim with the most widespread cationic and zwitterionic rhodamine dyes (123, 6G and B)) was studied using UV-VIS spectrometry and fluorescence as well as 1D and 2D NMR techniques. It was found that all three calixarenes form a complex with rhodamine dyes with a 1:1 composition. The association constants of calixarene-dye co

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Basilotta, Rossella, Deborah Mannino, Alessia Filippone, et al. "Role of Calixarene in Chemotherapy Delivery Strategies." Molecules 26, no. 13 (2021): 3963. http://dx.doi.org/10.3390/molecules26133963.

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Since cancer is a multifactorial disease with a high mortality rate, the study of new therapeutic strategies is one of the main objectives in modern research. Numerous chemotherapeutic agents, although widely used, have the disadvantage of being not very soluble in water or selective towards cancerous cells, with consequent side effects. Therefore, in recent years, a greater interest has emerged in innovative drug delivery systems (DDSs) such as calixarene, a third-generation supramolecular compound. Calixarene and its water-soluble derivatives show good biocompatibility and have low cytotoxic

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Lazar, Adina N., Oksana Danylyuk, Kinga Suwinska, and Anthony W. Coleman. "The Structure of the Tetra-Potassium Salt of Calix[4]Arene Dihydroxyphosphonic Acid." Chemistry Journal of Moldova 2, no. 1 (2007): 98–101. http://dx.doi.org/10.19261/cjm.2007.02(1).07.

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The solid-state structure of the tri-potassium calix[4]arene dihydroxyphosphonate salt is presented. In this structure, two potassium cations bridge between layers of dimeric calixarene diphosphonate units and two other potassium cations bridge along the face of the layers. The ubiquitous dimeric association of the calixarenes shows the highest interdigitation value so far observed. As expected, the cations are solvated and are complexed exo with respect to calixarene crown. The octahedral coordination sphere of the potassium cations is formed by two phosphonate groups of the calixarenes and f

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Lebrón, José Antonio, Manuel López-López, Clara B. García-Calderón, et al. "Multivalent Calixarene-Based Liposomes as Platforms for Gene and Drug Delivery." Pharmaceutics 13, no. 8 (2021): 1250. http://dx.doi.org/10.3390/pharmaceutics13081250.

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The formation of calixarene-based liposomes was investigated, and the characterization of these nanostructures was carried out using several techniques. Four amphiphilic calixarenes were used. The length of the hydrophobic chains attached to the lower rim as well as the nature of the polar group present in the upper rim of the calixarenes were varied. The lipid bilayer was formed with one calixarene and with the phospholipid 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine, DOPE. The cytotoxicity of the liposomes for various cell lines was also studied. From the results obtained, the liposomes fo

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Cohen, Yoram, and Sarit Slovak. "Diffusion NMR for the characterization, in solution, of supramolecular systems based on calixarenes, resorcinarenes, and other macrocyclic arenes." Organic Chemistry Frontiers 6, no. 10 (2019): 1705–18. http://dx.doi.org/10.1039/c9qo00329k.

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The use of diffusion NMR in studying calixarenes and other arene-based supramolecular systems is described, emphasizing the pivotal role played by the calixarene community in transforming the methods into a routine tool used in supramolecular chemistry.

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Schatz, Jürgen. "Recent Application of ab initio Calculations on Calixarenes and Calixarene Complexes. A Review." Collection of Czechoslovak Chemical Communications 69, no. 6 (2004): 1169–94. http://dx.doi.org/10.1135/cccc20041169.

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In this short review the application of ab initio quantum chemical calculations on calixarenes and calixarene complexes is highlighted. The main focus lies on results obtained mainly during the last 2-3 years. A review with 92 references.

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Kalchenko, Vitaly I. "Calixarene receptors of environmentally hazardous and biorelevant molecules and ions." Pure and Applied Chemistry 80, no. 7 (2008): 1449–58. http://dx.doi.org/10.1351/pac200880071449.

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In the paper, a report on the rational design of the calixarene receptors bearing ligating, H-donor, H-acceptor fragments at the wide and/or narrow rim of the macrocycle is presented. The calixarenes form supramolecular complexes with various cations, anions, organic molecules, and biomolecules in solution, in the crystalline state and even in the gas phase. The calixarenes or their complexes can be used as materials for radionuclide extraction, construction of chemosensors, and drug design.

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Allen, Hillary F., Kevin D. Daze, Takashi Shimbo, et al. "Inhibition of histone binding by supramolecular hosts." Biochemical Journal 459, no. 3 (2014): 505–12. http://dx.doi.org/10.1042/bj20140145.

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We report a new set of calixarene-based host compounds and show their applicability in characterizing functions of methyllysine-recognizing epigenetic readers. Calixarenes disrupt the association of the PHD finger of CHD4 with a trimethylated, but not an unmodified, histone tail.

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Wojaczyńska, Elżbieta, Marta Ostrowska, Małgorzata Lower, Natalia Czyżyk, Anna Jakieła, and Alberto Marra. "Recent Advances in Synthesis and Applications of Calixarene Derivatives Endowed with Anticancer Activity." Molecules 29, no. 17 (2024): 4240. http://dx.doi.org/10.3390/molecules29174240.

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Calix[n]arenes, macrocycles constituted of 4–8 phenol moieties linked through methylene bridges, are stable molecules that can be selectively functionalised at the upper or lower rim. It has already been demonstrated that calixarene derivatives can be biologically or pharmacologically active compounds. More recently, suitably functionalised calixarenes and calixarene analogues (dihomooxacalixarenes, thiacalixarenes, calix[4]resorcinols, azacalixarenes, calixpyrroles, and pillarenes) were found to act as anticancer agents, at least in in vitro assays. We are reporting on the latest progress in

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Ling, Irene, Alexandre N. Sobolev, and Colin L. Raston. "Controlling the organization of phosphonium cations relative to p-sulfonatocalix[4]arene anions." CrystEngComm 17, no. 7 (2015): 1526–30. http://dx.doi.org/10.1039/c4ce02086c.

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A composite material containing supermolecules of 1,4-bis(triethylammoniomethyl)benzene and p-sulfonated calix[4]arene involves preferential binding of the ammonium moieties in the cavities of two geometrically opposed calixarenes with mono-phosphonium cations arranged in the endo-orientation with respect to the calixarene bilayers, as a multi-layered structure.

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SHIN, DONG-MYUNG, DONG-MEE SONG, GEEWON CHUNG, and KYEONGTAE KIM. "COMPLEXATION OF AROMATIC MOLECULES WITH NEW CALIXARENE DERIVATIVES CONTAINING TWO ARYL SULFIDE RINGS." Journal of Nonlinear Optical Physics & Materials 14, no. 04 (2005): 513–20. http://dx.doi.org/10.1142/s0218863505002967.

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The cuplike structure of calix[4]arenes is one of the most attractive features, which has been observed both in the solid state and in solution. The newly synthesized 5,11,17,23-tetrakis(3-mercaptopropyl)calix[4]arene (1) and 25,26,27,28-tetrakis(5-mercaptopenthoxy)calix[4]arene containing aryl sulfide rings (2), have four alkyl thiol linkages, which allow the calixarenes to attach onto the gold surface. Surface plasmon resonance (SPR) spectroscopy allows us to monitor the binding of calixarene derivatives on the gold surface. The 1 and 2 bind very effectively on the gold surface and self-asse

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Marcos, Paula M., and Mário N. Berberan-Santos. "Recent Advances in Calixarene-Based Fluorescent Sensors for Biological Applications." Sensors 24, no. 22 (2024): 7181. http://dx.doi.org/10.3390/s24227181.

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Due to their structural features, macrocyclic compounds such as calixarenes, conjugated with a variety of fluorophores have led to the development of fluorescent probes for numerous applications. This review covers the recent advances (from 2009 to date) made in calixarene-based fluorescent sensors and their biological applications. In addition to the fluorescence mechanisms used to signal the analyte binding, this article focuses mainly on the detection of biological relevant ions, on the selective sensing of biomolecules, such as amino acids, enzymes, drugs and other organic compounds, and o

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Ling, Irene, Mohamed Makha, Alexandre N. Sobolev, Yatimah Alias, and Colin L. Raston. "Mapping Out the Diversity of Lanthanide(III) Coordination Complexes Involving p-Sulfonatocalix[4,6]arenes." Australian Journal of Chemistry 73, no. 6 (2020): 570. http://dx.doi.org/10.1071/ch19640.

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Structurally authenticated complexes of the cone-shaped p-sulfonatocalix[4]arene and conformationally flexible p-sulfonatocalix[6]arene devoid of co-ligands/ancillary molecules are limited. Early and late members of the lanthanide series as their trivalent ions, La3+, Er3+, and Yb3+, form complexes from aqueous media under these conditions. For La3+ and Er3+, distinct hydrophobic and hydrophilic bilayers are formed with p-sulfonatocalix[4]arene, whereas for Yb3+, two complexes form that deviate from the well-known bilayer arrangement of calixarenes. Replacing the calixarene with p-sulfonatocal

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Elsegood, Mark, Lynne Horsburgh, Carl Redshaw, Oliver Rowe, and Simon Teat. "Pillared 2-D MOFs Based on a Lower-Rim Acid-Appended Calix[4]arene." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1226. http://dx.doi.org/10.1107/s2053273314087737.

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Calixarenes have been the focus of intense research study of both their organic and metal-coordinated chemistry over the past twenty or so years. Calixarenes generally have intrinsic cavities in their cone or partial cone structures, often filled with coordinated or non-coordinated solvent of crystallization, or filled with substituents from neighboring calixarene molecules. Much of this research has generated molecular, or zero-dimensional compounds, rather than oligomeric or polymeric materials. The shape and size of the calixarene molecules and complexes has led to their use in separation s

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Yeong Yi Wong, Faridah Lisa Supian, Afiq Radzwan, Nur Farah Nadia Abd Karim, Amiruddin Shaari, and Aminu Shehu Yamusa. "Density Functional Theory Study on the Reactivity and Stability of Calix[n]arene-paba Complexes: Drug Sensor Application." International Journal of Nanoelectronics and Materials (IJNeaM) 17, no. 2 (2024): 242–48. http://dx.doi.org/10.58915/ijneam.v17i2.698.

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As drug carriers, calixarenes are often investigated and employed in numerous sectors as host molecules. The use of calixarenes in drug delivery systems is a relatively new notion, despite the fact that countless studies have been conducted on calixarenes and their various applications. It is worthwhile to research the computational investigation of the host-guest interaction between calixarenes and para-aminobenzoic acid (PABA) in terms of their binding energy and band gap. The first principles study of PABA sensing by calix [4] arene (C4) and calix [6] arene (C6) based on density functional

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Priyangga, Krisfian Tata Aneka, Yehezkiel Steven Kurniawan, Keisuke Ohto, and Jumina Jumina. "Review on Calixarene Fluorescent Chemosensor Agents for Various Analytes." Journal of Multidisciplinary Applied Natural Science 2, no. 1 (2022): 23–40. http://dx.doi.org/10.47352/jmans.2774-3047.101.

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Calixarenes are well-known supramolecular host molecules with versatile applications. Over the past decades, hundreds of selective and sensitive detections of several analytes have been reported by employing calixarenes as the chemosensor agent. The detection and quantification of metal ions and anions are crucial as heavy metal ions are harmful to living organisms, while monitoring anions is pivotal in the environmental samples. On the other hand, detecting and quantifying biomolecules and neutral molecules are critical due to their irreplaceable role in human health. In this review, we summa

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Bilyk, Alexander, Annegret K. Hall, Jack M. Harrowfield, Mir Wais Hosseini, Brian W. Skelton, and Allan H. White. "A Unique Rare-Earth Cluster within a Calixarene Sandwich: Parallels in the Chemistry of Cyclosiloxanes and Calixarenes." Australian Journal of Chemistry 53, no. 12 (2000): 895. http://dx.doi.org/10.1071/ch00152.

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Determination of the crystal structure of a complex obtained by the reaction of the dimethyl sulfoxide (dmso) solvate of neodymium(III) nitrate with p-t-butyltetrathiacalix[4]arene in dimethylformamide (dmf) in the presence of base showed a regular, planar cluster of four neodymium atoms bridged by a hydroxyl group to be sandwiched between two fully deprotonated calixarene moieties. The sulfur and oxygen donor atoms of the calixarenes are both involved in coordination to the rare-earth atoms. Both dmf and dmso are found as ligands on neodymium but occupation of the calixarene cavity is by dmf

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Zaremba, A., and M. Platonov. "Search of the binding site of the calix[4]arene with the myosin light-chain kinase by molecular dynamics method." Bulletin of Taras Shevchenko National University of Kyiv. Series: Biology 78, no. 2 (2019): 57–61. http://dx.doi.org/10.17721/1728_2748.2019.78.57-61.

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Disruptions of the functional activity of human smooth muscle are associated with a significant number of pathological conditions of the human body. The myosin light-chain kinase is the key enzyme of the signaling cascade of neurohumoral signals in smooth muscle cells. Especially it is important in the long-term tonic contraction. Disruption of its kinase activity can lead to a weakening of the intercellular interaction of the epithelial and endothelial cells, disruption of functioning of the intestinal smooth muscles and vessels, complication of labor activity. At the moment the search for ef

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Weigand, Wolfgang, Thomas Weisheit, and Martin Freesmeyer. "Examination of the complexation ability of different calixarene derivatives towards [223Ra]RaCl2 in a hospital radiopharmaceutical laboratory." Nuklearmedizin 57, no. 06 (2018): 242–46. http://dx.doi.org/10.3413/nukmed-0933-18-08.

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Summary Aim: In this contribution we investigated the potential transfer of an established method for the synthesis of 223Ra-labelled calixarene complexes to a hospital radiopharmaceutical environment. For this purpose, commercially available [223Ra]RaCl2 solution in pharmaceutical grade (Xofigo®) was reacted with three calixarene derivatives. Methods: A wellestablished two-phase extraction method using a two-phase solvent system was performed for complexation of the radium ions with calixarenes under slightly basic conditions. Moreover, the complexation reaction was conducted in homogenous me

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Masoumifeshani, Emran, Michał Chojecki, Dorota Rutkowska-Zbik, and Tatiana Korona. "Association Complexes of Calix[6]arenes with Amino Acids Explained by Energy-Partitioning Methods." Molecules 27, no. 22 (2022): 7938. http://dx.doi.org/10.3390/molecules27227938.

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Intermolecular complexes with calixarenes are intriguing because of multiple possibilities of noncovalent binding for both polar and nonpolar molecules, including docking in the calixarene cavity. In this contribution calix[6]arenes interacting with amino acids are studied with an additional aim to show that tools such as symmetry-adapted perturbation theory (SAPT), functional-group SAPT (F-SAPT), and systematic molecular fragmentation (SMF) methods may provide explanations for different numbers of noncovalent bonds and of their varying strength for various calixarene conformers and guest mole

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Wong, Yeong Yi, Faridah Lisa Supian, Nur Farah Nadia Abd Karim, Mazlina Musa, Mohd Syahriman Mohd Azmi, and Ratnawulan Ratnawulan. "Host-Guest Sensing Interactions of Calixarene-Entrapped Para-Aminobenzoic Acid Using the Langmuir Technique." Journal of Science and Mathematics Letters 11, Special (2023): 63–72. http://dx.doi.org/10.37134/jsml.vol11.sp.7.2023.

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Calixarenes are frequently studied as the host supramolecule in drug carrier applications. The ability to encapsulate and control drug delivery is due to their unique structures with a hydrophobic upper rim and a hydrophilic lower rim. Para-aminobenzoic acid (PABA) is a drug used as the main ingredient in sunscreen products with photoallergic contact dermatitis effects. This study has been motivated by the necessity of developing a PABA sensor even at a deficient concentration. In this work, the uses of two calixarenes, calix[4]arene (C4) and calix[6]arene (C6), in entrapping the PABA drug hav

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Vysotsky, Myroslav, Christian Schmidt, and Volker Bohmer. "ChemInform Abstract: Chirality in Calixarenes and Calixarene Assemblies." ChemInform 32, no. 5 (2001): no. http://dx.doi.org/10.1002/chin.200105282.

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Islam, Md Monarul, Paris E. Georghiou, Shofiur Rahman, and Takehiko Yamato. "Calix[3]arene-Analogous Metacyclophanes: Synthesis, Structures and Properties with Infinite Potential." Molecules 25, no. 18 (2020): 4202. http://dx.doi.org/10.3390/molecules25184202.

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Calixarene-analogous metacyclophanes (CAMs) are a special class of cyclophanes that are cyclic polyaromatic hydrocarbons containing three or more aromatic rings linked by one or more methylene bridging groups. They can be considered to be analogues of calixarenes, since, in both types of molecules, the component aromatic rings are linked by methylene groups, which are meta to each other. Since the prototype or classical calix[4]arene consists of four benzene rings each linked by methylene bridges, which are also meta to each other, it can be considered to be an example of a functionalized [1.1

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Kogan, Katerina, Suheir Omar, Benny Bogoslavsky, and Silvio E. Biali. "The Preparation and Crystal Structures of Octaoxoketocalix[8]arene Derivatives: The Ketocalixarene Counterparts of the Largest “Major” Calixarene." Molecules 29, no. 17 (2024): 4094. http://dx.doi.org/10.3390/molecules29174094.

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The purpose of this study was to synthesize and structurally characterize ketocalixarenes (i.e., calixarenes where the bridging methylene bridges are replaced by carbonyl groups) derived from the largest “major” calixarene, namely p-tert-butylcalix[8]arene 3a. Ketocalix[8]arenes were synthesized by the oxidation of protected p-tert-butylcalix[8]arene derivatives. Octamethoxy-p-tert-butylketocalix[8]arene 6b was prepared by the photochemical reaction of the calixarene 3b with NBS in a CHCl3/H2O mixture. The oxidation of the methylene groups of octaacetoxy-p-tert-butylcalix[8]arene 3c was conduc

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Tao, Xuchen, Quan Feng, and Hui He. "Preparation of Calixarene-PI Nanofibers and Application as a Selective Adsorbent for Heavy Metal Ions." Journal of Engineered Fibers and Fabrics 13, no. 1 (2018): 155892501801300. http://dx.doi.org/10.1177/155892501801300101.

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In order to utilize the adsorption selectivity of calixarenes towards heavy metal ions, calixarene functionalized polyimide (Calix-PI) fibers were prepared by three main synthesis procedures including preparation of the calixarene polyamide acid (Calix-PAA) spinning solution via amidation, fabrication of the Calix-PAA fibers by electrospinning, and preparation of the Calix-PI fibers via thermal imidization on the Calix-PAA fibers. The Calix-PI fibers were characterized by Fourier transform infrared spectroscopy, scanning electronic microscopy and thermogravimetric analysis. The Calix-PI fibers

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Rathore, Rajendra, Sergey V. Lindeman, and Sameh H. Abdelwahed. "Design, Synthesis, Electronic Properties, and X-ray Structural Characterization of Various Modified Electron-Rich Calixarene Derivatives and Their Conversion to Stable Cation Radical Salts." Molecules 27, no. 18 (2022): 5994. http://dx.doi.org/10.3390/molecules27185994.

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We have designed and synthesized electron-rich calixarene derivatives, which undergo reversible electrochemical oxidation in a well-accessible potential range that allows the ready preparation and isolation of the corresponding cation radicals. Preparation of mono- or tetra-radical cation can be achieved by using stable aromatic cation-radical salts such as MA+•, MB+•, and NAP+• as selective organic oxidants. The cation radicals of calixarenes are stable indefinitely at ambient temperatures and can be readily characterized by UV-vis-NIR spectroscopy. These cation radicals bind a single molecul

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Mironova, Diana, Egor Makarov, Islamiya Bilyukova, et al. "Aggregation, Cytotoxicity and DNA Binding in a Series of Calix[4]arene Amphiphile Containing Aminotriazole Groups." Pharmaceuticals 16, no. 5 (2023): 699. http://dx.doi.org/10.3390/ph16050699.

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The present work focuses on the study of the aggregation and complexing properties of calixarenes as potential DNA condensation agents for gene delivery. In the current study, 1,4-triazole derivatives of calix[4]arenes 7 and 8 containing monoammonium fragments were synthesized. The synthesized compound’s structure was characterized by using various spectroscopic techniques (FTIR, HRESI MS, ¹H NMR and ¹³C NMR). The interactions between a series of calix[4]arene-containing aminotriazole groups (triazole-containing macrocycles with diethylenetriammonium fragments (3 and 4) and triazole-containing

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Kazantseva, Z. I., I. A. Koshets, A. V. Mamykin, et al. "Detection of the explosive nitroaromatic compound simulants with chemosensory systems based on quartz crystal microbalance and chemiresistive sensor arrays." Semiconductor Physics, Quantum Electronics and Optoelectronics 26, no. 3 (2023): 332–42. http://dx.doi.org/10.15407/spqeo26.03.332.

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The work is devoted to investigations of possibility of rapid detection and subsequent identification of explosive substances by using the arrays of two types of sensor elements: quartz crystal microbalances and chemiresistive electrodes. Thin layers of calixarene compounds and composites of electrically conductive polymers, respectively, were used as the sensitive coatings. Several types of nitroaromatic compounds from nitrotoluene series were chosen as simulants of explosive substances: O-Nitrotoluene (2-MNT) and Nitrobenzene (MNB), the concentration of these volatile compounds varied from 1

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Gidwani, Beena, Sanjay Kumar Gupta, and Jyoti Sahu. "A Panoptic Review on Improvement in Chemothera-peutic Properties of Cytotoxic Drugs through Calixarene." International Journal of Pharmaceutical Sciences and Nanotechnology(IJPSN) 16, no. 3 (2023): 6546–55. http://dx.doi.org/10.37285/ijpsn.2023.16.3.8.

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Cancer is one of the most fatal and complicated diseases. Chemotherapeutic drugs occupy a crucial position in cancer treatment, although it is still challenging to cure it from the root cause without harming healthy cells. Adjuvant or neoadjuvant and concurrent chemotherapies are usually used along with surgery and radiotherapy, depending on the spreading of tumour cells to its vicinity. However, it cannot wholly kill cancerous cells, which further develop after a while; the reason behind this is poor drug pharmacokinetic and biopharmaceutical parameters. Considering the approach of calixarene

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Peters, Max Sena, Miao Li, and Thomas Schrader. "Interactions of Calix[n]arenes with Nucleic Acids." Natural Product Communications 7, no. 3 (2012): 1934578X1200700. http://dx.doi.org/10.1177/1934578x1200700325.

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DNA interaction with artificial binders is of great interest, especially in light of the broad range of possible biomedical applications. The growing understanding of replication, transcription and translation opened the path for new approaches to target pathological effects at a very early stage. Meanwhile, the competitive binding to nucleic acids by designed molecules, which, for example, block certain sequences for natural binders, such as transcription factors, has become a promising concept in the context of gene therapy. On the other extreme, the transport of nucleic acids over the cell

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Alex, Jimi M., Martin L. Rennie, Sylvain Engilberge, et al. "Calixarene-mediated assembly of a small antifungal protein." IUCrJ 6, no. 2 (2019): 238–47. http://dx.doi.org/10.1107/s2052252519000411.

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Synthetic macrocycles such as calixarenes and cucurbiturils are increasingly applied as mediators of protein assembly and crystallization. The macrocycle can facilitate assembly by providing a surface on which two or more proteins bind simultaneously. This work explores the capacity of the sulfonato-calix[n]arene (sclx n ) series to effect crystallization of PAF, a small, cationic antifungal protein. Co-crystallization with sclx4, sclx6 or sclx8 led to high-resolution crystal structures. In the absence of sclx n , diffraction-quality crystals of PAF were not obtained. Interestingly, all three

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Shkrabak, O. A., T. O. Veklich, R. V. Rodik, V. I. Kalchenko та S. O. Kosterin. "Inhibition of plasma membrane Сa(2+),Mg(2+)-АТРase by сalixarene sulfonylamidines. Structure-activity relationship". Ukrainian Biochemical Journal 94, № 4 (2022): 18–35. http://dx.doi.org/10.15407/ubj94.04.018.

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Previously we have already shown that tetrasulfonylamidinecalixarene C-90 inhibited plasma membrane Са2+,Mg2+-АТРаse of smooth muscle cells selectively to other ATPases of plasma membrane. To inhance the inhibitory effect of calixarenes several alkoxycalixarene sulfonylamidines structurally similar to calixarene C-90 were synthesized and their effects on the mentioned enzyme activity, the level of cytoplasmic Ca2+ concentration and hydrodynamic diameter of isolated smooth muscle cells were checked. It was shown that sulfonylamidino groups are crucial for Са2+,Mg2+-АТРаse inhibition, the effic

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Adhel, Erika, Axel Labattut, Timothée Naret, Diana Dragoe, and Vincent Huc. "A Calix[8]arene-Based Catalyst for Suzuki–Miyaura Couplings with Reduced Pd_Leaching." Catalysts 12, no. 10 (2022): 1098. http://dx.doi.org/10.3390/catal12101098.

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Pd-catalysed reactions are amongst the most important in current chemistry. Consequently, very reactive catalysts were developed during the last decades, allowing very high conversions at low catalytic rates. However, decreasing Pd leaching in final products without decreasing catalyst efficiency remains an unsolved issue, especially in the pharma industry. We recently showed that using calixarenes as platforms for Pd-based catalysts constitutes an efficient answer to this concern. In the present work, we show that using these calixarenic platforms in combination with suitably engineered ligan

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Suchorski, Yuri, Jochen Gottfriedsen, Rafal Wrobel, Bartosz Strzelczyk, and Helmut Weiss. "Evaluation and X-Ray Induced Modification of the Cerium Oxidation State in Cerium Calixarene Complexes." Solid State Phenomena 128 (October 2007): 115–20. http://dx.doi.org/10.4028/www.scientific.net/ssp.128.115.

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The cerium oxidation state in novel calixarene-supported cerium(IV) β-diketonate complexes [p-tBu-calix[4](OMe)2(O)2]Ce(acac)2 (1) and [p-tBu-calix[4](OMe)2(O)2]Ce(hfac)2 (2), which are a new class of potential precursors for homogeneous oxidative transformations, has been determined using X-ray photoelectron spectroscopy (XPS). Cerium oxidation states between 3.6 and 3.65 were detected, distinctly different from their nominal value of +4. An X-ray induced photoreduction of these compounds was detected. Because of the observed stability of the X-ray modified oxidation state under ambient condi

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Burilov, Vladimir, Egor Makarov, Diana Mironova, et al. "Calix[4]arene Polyamine Triazoles: Synthesis, Aggregation and DNA Binding." International Journal of Molecular Sciences 23, no. 23 (2022): 14889. http://dx.doi.org/10.3390/ijms232314889.

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Artificial gene delivery systems are in great demand from both scientific and practical biomedical points of view. In this paper, we present the synthesis of a new click chemistry calix[4]arene precursor with free lower rim and new water-soluble calixarene triazoles with 12 amino-groups on the upper rim (one with free phenol hydroxyl groups and two another containing four butyl or tetradecyl fragments). Aggregation in the series of amino-triazole calixarenes of different lipophilicity (calixarene with free phenol hydroxyl groups or butyl and tetradecyl fragments on the lower rim) was studied u

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XIE, D., and C. D. GUTSCHE. "ChemInform Abstract: Calixarenes. Part 46. Calixarene Anhydrides as Useful Synthetic Intermediates." ChemInform 28, no. 33 (2010): no. http://dx.doi.org/10.1002/chin.199733124.

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Marradi, Marco, Stefano Cicchi, Francesco Sansone, Alessandro Casnati, and Andrea Goti. "Low-generation dendrimers with a calixarene core and based on a chiral C 2-symmetric pyrrolidine as iminosugar mimics." Beilstein Journal of Organic Chemistry 8 (June 26, 2012): 951–57. http://dx.doi.org/10.3762/bjoc.8.107.

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The preparation of low-generation dendrimers based on a simple calix[4]arene scaffold by insertion of the iminosugar-analogue C 2-symmetric 3,4-dihydroxypyrrolidine is described. This methodology allows a rapid incorporation of a considerable number of iminosugar-like moieties in a reduced volume and in a well-defined geometry. The inclusion of alkali-metal ions (sodium and potassium) in the polar cavity defined by the acetamide moieties at the lower rim of the calixarene was demonstrated, which allows also the rigidification of the dendrimer structure and the iminosugar presentation in the cl

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Vaňura, Petr, and Ivan Stibor. "Extraction of Alkaline and Alkaline-Earth Metal Cations at Synergistic Action of Bis[undecahydro-7,8-dicarbaundecaborato(2-)]cobaltate(1-) and Substituted Calix[n]arenes in Nitrobenzene." Collection of Czechoslovak Chemical Communications 63, no. 12 (1998): 2009–14. http://dx.doi.org/10.1135/cccc19982009.

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The extraction of alkaline and alkaline-earth metal cations at synergistic action of bis[undecahydro-7,8-dicarbaundecaborato(2-)]cobaltate(1-) and substituted calix[n]arenes (n = 4 and 6) in nitrobenzene was investigated. It was found that the lower-rim-substituted calix[4]arene with four (diethylcarbamoyl)methyl groups extracts calcium, strontium and barium in the systems under study much better than calixarenes which do not contain amide groups. Synergistic factor values log S(Ca) = 7, log S(Sr) = 5.5 and log S(Ba) = 5.4 were found. The competition of K+ and Na+ in the extraction of strontiu

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Glennon, Jeremy D., Elizabeth Horne, Patricia O'Sullivan, Sharon Hutchinson, M. Anthony McKervey, and Stephen J. Harris. "Transition Metal Ion Complexation and Extraction by Hydroxamate Functionalised p-Tert-Butylcalix[4]Arenes." Metal-Based Drugs 1, no. 2-3 (1994): 151–60. http://dx.doi.org/10.1155/mbd.1994.151.

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The functionalisation of macrocyclic p-tertbutylcalix[4]arenes at the lower rim with hydroxamic acid and proline hydroxamic acid groups gives the calixarenes chelating properties similar to siderophores. The H1 NMR spectrum of p-tertbutylcalix[4]arene tetrahydroxamic acid shows a broad band at 10.8 ppm in DMSO-d6 attributed to NHOH protons. Diffuse reflectance spectral analysis of PVC membranes containing the calixarene hydroxamic acids show absorption bands at 485 nm and 504 nm following contact with aqueous solutions of Fe(III) and V(V) respectively. The pH dependency of this extractive sele

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Cay, Seydahmet, Serkan Sayin, and Mehmet Soner Engin. "Calix[4]arene Embedded Polyamide Supported Liquid Membrane for Separation of Heavy Metals from Aqueous Solutions." Turkish Journal of Agriculture - Food Science and Technology 8, no. 2 (2020): 387. http://dx.doi.org/10.24925/turjaf.v8i2.387-391.3064.

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In this study, we aimed to prepare new calixaren embedded mercapto groups supported liquid membranes and to use them in the transport of heavy metals. For this purpose 5,11,17,23-tetra-tert-butyl-25,27-bis(3-thiol-1-oxypropane)-26,28-dihydroxylcalix[4]arene was synthesized. The synthesized calixarene compounds were fully characterized by spectroscopic and the other techniques. The prepared compounds were supported polyamide liquid membranes and obtained calix[4]aren embedded supported liquid membranes (C@PSMs). The characterization of C@PSM was carried out by FTIR, TGA and elemental analysis t

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Memon, Shahabuddin, D. Max Roundhill, and Mustafa Yilmaz. "Remediation and Liquid-Liquid Phase Transfer Extraction of Chromium(VI). A Review." Collection of Czechoslovak Chemical Communications 69, no. 6 (2004): 1231–50. http://dx.doi.org/10.1135/cccc20041231.

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Chromium(VI) is a widely used industrial chemical, and is generally considered to pose a greatest human health risk because it is more toxic, more soluble, and more mobile than chromium(III). Workers in industries that use chromium, in particular stainless steel welding, chromate production, chromium plating, and chrome pigment industries, where exposure via inhalation of aerosols is primarily to hexavalent chromium, are at increased risk of chromium effects. In this article we demonstrate various studies regarding remediation methods in particular liquid-liquid extraction of chromate and dich

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Supian, Faridah Lisa, Wong Yeong Yi, Nur Farah Nadia Abd Karim, Afiq Radzwan, Darvina Lim Choo Kheng, and Abdullah Faisal Al Naim. "THE MOLECULAR BEHAVIORS OF CALIXARENES AT THE AIR-WATER INTERFACE: DENSITY FUNCTIONAL THEORY, SURFACE PRESSURE, POTENTIAL, AND EFFECTIVE DIPOLE MOMENT." Malaysian Journal of Science 41, no. 3 (2022): 63–68. http://dx.doi.org/10.22452/mjs.vol41no3.9.

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This study examined the behaviors of Langmuir-Blodgett ultrathin calixarene films at the air-water interface. The Langmuir trough was used to estimate the surface pressure, surface potential, and effective dipole moment of two calixarenes, namely, calix[4]arene (THC4) and calix[8]arene (THC8). The band gap was determined using the density functional theory (DFT). The DFT simulation gave a band gap of 2.28 eV for THC4, confirming that THC4 was an insulator. The surface pressure isotherms of THC4 and THC8 yielded the expected molecular behavior from the gaseous to the solid phases. THC4 and THC8

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Wang, Jianshe, and C. David Gutsche. "ChemInform Abstract: Calixarenes. Part 54. Synthesis and Structure of Calixarene-Fullerene Dyads." ChemInform 32, no. 1 (2001): no. http://dx.doi.org/10.1002/chin.200101130.

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Azahari, Noor Azyyati, Faridah Lisa Supian, Tim H. Richardson, and Syed Abdul Malik. "Properties of Calix4-Lead(Pb) Films Using Langmuir-Blodgett (LB) Technique as an Application of Ion Sensor." Advanced Materials Research 895 (February 2014): 8–11. http://dx.doi.org/10.4028/www.scientific.net/amr.895.8.

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Calixarenes are promising compounds to be used as ionophores and for molecular recognition. Their ability to form Langmuir and Langmuir-Blodgett (LB) films is of great interest in order to obtain small sensor devices which incorporate an active nanometric film. Calix[4]arene (Calix4) has been used in this work and its ability to form Langmuir films has been shown. Calix4 forms monolayers but at higher compressions tends to form multilayers. The presence of ions in the subphase, as lead chloride salt solutions, leads to some changes in the surface pressure-area (П-A) isotherms and surface poten

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Daze, Kevin D., Catherine E. Jones, Brandin J. Lilgert, Cory S. Beshara, and Fraser Hof. "Determining the effects of salt, buffer, and temperature on the complexation of methylated ammonium ions and methyllysines by sulfonated calixarenes." Canadian Journal of Chemistry 91, no. 11 (2013): 1072–76. http://dx.doi.org/10.1139/cjc-2013-0186.

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Sulfonated calixarenes have long been used as effective binders of ammonium ions in aqueous solution. Recently, the utility of sulfonated calix[4]arenes and calix[6]arenes as specific agents for binding biologically important ammonium ions, and especially post-translationally methylated amino acids, peptides, and proteins, has suggested that they might have important roles to play in the control and understanding of biological pathways. We report here binding data in various buffer systems that attempt to shed light on the roles of buffer and salt in the recognition processes of these hosts. W

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Delaigue, Xavier, Jack M. Harrowfield, M. Wais Hosseini, Mauro Mocerino, Brian W. Skelton, and Allan H. White. "'Soft' Calixarenes–Structural Aspects of Calixarene Allyl Ethers and of Thiacalixarene Synthesis." Australian Journal of Chemistry 51, no. 2 (1998): 111. http://dx.doi.org/10.1071/c97095.

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Syntheses and room-temperature single-crystal X-ray structure determinations are recorded for an array of p-t-butylcalix[n]arenes, n = 4 or 6, diversely functionalized at the phenolic oxygen atoms: the 1,3-diallyl 2,4-dimethyl ether for n = 4 (1), the hexaallyl ether for n = 6 (2), and the 1,3-dibenzyl 2,4-bis(dimethylthiocarbamoyl) derivative for n = 4 (3), with a view to establishing ligand baseline conformations for subsequent metal complexation studies, and for exploring any inclusion properties. Compound (1) is monoclinic, P21/c, a 16·751(9), b 20·772(7), c 27·91(1) Å, β 99·39(4)°, Z = 8,

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Mourer, Maxime, Jean-Bernard Regnouf-de-Vains, and Raphaël E. Duval. "Functionalized Calixarenes as Promising Antibacterial Drugs to Face Antimicrobial Resistance." Molecules 28, no. 19 (2023): 6954. http://dx.doi.org/10.3390/molecules28196954.

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Since the discovery of polyphenolic resins 150 years ago, the study of polymeric compounds named calix[n]arene has continued to progress, and those skilled in the art perfectly know now how to modulate this phenolic ring. Consequently, calix[n]arenes are now used in a large range of applications and notably in therapeutic fields. In particular, the calix[4]arene exhibits multiple possibilities for regioselective polyfunctionalization on both of its rims and offers researchers the possibility of precisely tuning the geometry of their structures. Thus, in the crucial research of new antibacteria

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Hamidon, Farish Armani, Faridah Lisa Supian, Mazlina Mat Darus, Yeong Yi Wong, and Nur Farah Nadia Abd Karim. "Molecular Modelling Comparisons, Optical and Band Gap Characterisation of 4-Sulfocalix[4]arene Thin Film." Sains Malaysiana 53, no. 6 (2024): 1405–19. http://dx.doi.org/10.17576/jsm-2024-5306-14.

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The advantageous property of water-soluble calixarenes is their ability to form stable complexes with inorganic guest molecules. Due to these attributes, their application in areas including molecular recognition, sensing, and supramolecular chemistry is extraordinarily alluring. The 4-sulfocalix[4]arene (SC[4]) is a water-soluble molecule and a derivative of the calixarene family that has both aromatic rings and sulfonate groups. The thin films were prepared using a spin-coating technique and characterised by Ultraviolet-Visible Spectroscopy (UV-Vis). By employing the Corey-Pauling-Koltun (CP

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Arimura, Takashi, Seiji Shinkai, Tsutomu Matsuda, Yoshimi Hirata, Hiroshi Satoh, and Osamu Manabe. "Fries Rearrangement in Calixarene Esters: A New Entry for the Synthesis ofp-Substituted Calixarenes." Bulletin of the Chemical Society of Japan 61, no. 10 (1988): 3733–34. http://dx.doi.org/10.1246/bcsj.61.3733.

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