399 Works

Enzyme-responsive supramolecular polymers by complexation of bis(p-sulfonatocalixarenes) with suberyl dicholine-based pseudorotaxane

Dong-Sheng Guo, Yu Liu, Tian-Xing Zhang & Yi-Xuan Wang
A linear supramolecular ternary polymer was fabricated by iteratively threading cyclodextrin with suberyl dicholine and end-capping with bis-calixarenes, showing desired cholinesterase response.

Fluorimetric and molecular mechanics study of the inclusion complex of 2-quinoxalinyl-phenoxathiin with β-cyclodextrin

Iulia Matei, Anca Nicolae & Mihaela Hillebrand
The complex formed by the inclusion of the polarity-sensitive fluorescent probe 2-[2′-quinoxalinyl]-phenoxathiin (QP) into β-cyclodextrin (β-CD) was investigated by steady-state fluorescence spectroscopy in order to confirm the previously stated intramolecular charge transfer nature of the first excited singlet state of QP. A decrease in the emission intensity in the presence of β-CD was observed and explained on this basis. The 1:1 stoichiometry of the inclusion complex and its association constant of 2,223 M−1 were computed....

Inhibition and disintegration of insulin amyloid fibrils: a facile supramolecular strategy with p-sulfonatocalixarenes

Meenakshi N. Shinde, Nilotpal Barooah, Achikanath C. Bhasikuttan & Jyotirmayee Mohanty
This study reveals the ability of p-sulfonatocalix[4/6]arenes to effectively inhibit the fibril formation in human insulin and demonstrate its potential to disintegrate/dissolve the mature fibrils, a promising supramolecular therapeutic strategy for amyloidosis.

Dynamically Self-Assembling Metalloenzyme Models Based on Calixarenes

Werner M. Nau, Hüseyin Bakirci, Apurba L. Koner, Michael H. Dickman & Ulrich Kortz
Dreifach kontrolliert: Ternäre Komplexe aus einem makrocyclischen Wirt (p-Sulfonatocalix[4]aren), einem organischen Gast (2,3-Diazabicyclo[2.2.2]oct-2-en) und Ãbergangsmetallionen (siehe Bild) result...

A green to blue fluorescence switch of protonated 2-aminoanthracene upon inclusion in cucurbit[7]uril

Donal H. Macartney, Ruibing Wang & Lina Yuan
The inclusion of protonated 2-aminoanthracene in the cavity of cucurbit[7]uril increases its pKa values in the ground and excited states, resulting in the disappearance of the green emission of the neutral excited state and the significant enhancement of the blue emissions from the protonated excited state g

pH-responsive molecular assemblies of pyridylbutadiene derivative with cucurbit[7]uril

Anuji K. Vasu, Raman Khurana, Jyotirmayee Mohanty & Sriram Kanvah
pH-responsive emission behavior of supramolecular complexes between pyridylbutadiene with CB7 and formation of molecular assemblies is described.

Effect of torsional isomerization and inclusion complex formation with cucurbit[7]uril on the fluorescence of 6-methoxy-1-methylquinolinium

Zsombor Miskolczy, József G. Harangozó, László Biczók, Véronique Wintgens, Cédric Lorthioir & Catherine Amiel
Inclusion of 6-methoxy-1-methylquinolinium (C1MQ) in the cavity of cucurbit[7]uril (CB7) was studied by absorption, fluorescence, NMR and isothermal calorimetric methods in aqueous solution at 298 K. The free C1MQ exhibited dual-exponential fluorescence decay kinetics due to the two torsional isomers differi

A fluorescent host-guest complex of cucurbituril in solution: a molecular Jack O'Lantern

Brian D Wagner, Shannon J Fitzpatrick, Monica A Gill, Andrew I MacRae & Natasa Stojanovic
Fluorescence enhancement of a probe molecule in solution by the container molecule cucurbituril (CB) is reported for the first time. The fluorescence of the probe 2-anilinonaphthalene-6-sulfonate (2,6-ANS) in aqueous Na2SO4 solution is found to increase by a maximum factor of 5.0 upon addition of cucurbituril. This fluorescence enhancement is the result of the formation of a hostguest inclusion complex, in which the guest 2,6-ANS is incorporated inside the cavity of the host, cucurbituril. Measurement of...

Cucurbituril‐Modulated Supramolecular Assemblies: From Cyclic Oligomers to Linear Polymers

Hai Qian, Dong‐Sheng Guo & Yu Liu
Abstract Employing bis(p-sulfonatocalix[4]arenes) (bisSC4A) and N′,N′′hexamethylenebis(1-methyl-4,4′-bipyridinium) (HBV4+) as monomer building blocks, the assembly morphologies can be modulated by ...

Synthesis of Doubly Ethyl-Bridged Bis(p-sulfonatocalix[4]arene) and Its Supramolecular Polymerization with Viologen Dimer

Kun-Peng Wang, Dong-Sheng Guo, Hong-Xia Zhao & Yu Liu
Abstract A water-soluble supramolecular polymer with a high degree of polymerization and viscosity has been constructed based on the strong host–guest interaction between p-sulfonatocalix[4]arenes ...

Investigation of the inclusion interaction of p-sulfonatocalix[6]arene with trimebutine maleate

Jianbin Chao, Zhiqing Li, Yuhong Liu, Yongbin Zhang, Zhiqiang Guo, Bingtai Zhang & Xiugen Wang

U-Shaped Conformation of Alkyl Chains Bound to a Synthetic Host

Young Ho Ko, Hyunuk Kim, Youngkook Kim & Kimoon Kim
Taking it in turn: Despite the high internal strain, the long aliphatic chains of alkyltrimethylammonium ions buried deeply inside the cucurbit[8]uril (CB[8]) cavity adopt a U-shaped conformation (se...

Considerable Change of Fluorescence Properties upon Multiple Binding of Coralyne to 4-Sulfonatocalixarenes

Mónika Megyesi & László Biczók
The interaction of coralyne, an analogue of natural protoberberine alkaloids, with 4-sulfonatocalixarenes (SCXn) was studied in aqueous solution at pH 2 to reveal the major factors determining the stability, stoichiometry, and fluorescent properties of the species formed. Addition of SCXn to coralyne solution brought about remarkable fluorescence intensity diminution and hypochromism in the 300−440 nm absorption domain. SCXn hosts were capable of binding as many coralyne molecules as the number of their hydroxybenzenesulfonate units. The...

Cyclodextrin-assisted modulation of the photophysical properties and acidity constant of pyrene-armed calix[4]arene

V. S. Kalyani, D. D. Malkhede & Jyotirmayee Mohanty
The supramolecular pKa shift and modulation in the monomer and excimer emission behaviour of pyrene-armed calixarene with cyclodextrins find applications in ratiometric sensing.

NMR Study of the Reversible Trapping of SF6 by Cucurbit[6]uril in Aqueous Solution

Michel Luhmer, Luca Fusaro, Emanuela Locci & Adolfo Lai
The complexation of sulfur hexafluoride (SF6), a highly potent greenhouse gas, by cucurbit[6]uril (CB) was studied at various temperatures in Na2SO4 aqueous solutions by 19F and 1H NMR. CB shows a remarkable affinity for SF6, suggesting that it is a suitable molecular container for the design of materials tailored for SF6 trapping. At 298 K, the equilibrium constant characterizing the inclusion of SF6 by CB is 3.1 × 104 M−1 and the residence time of...

Hypervalent Iodine Based Reversible Covalent Bond in Rotaxane Synthesis

Markéta Kandrnálová, Zoran Kokan, Václav Havel, Marek Nečas & Vladimir Sindelar
The interlocked bambusuril: Reactive hypervalent iodine species possessing dynamic covalent bonds are utilized in a constitutive sense for the near quantitative synthesis of rotaxanes via the stabili...

Flexible Viologen Cyclophanes: Odd/Even Effects on Intramolecular Interactions

Mathilde Berville, Sylvie Choua, Christophe Gourlaouen, Corinne Boudon, Laurent Ruhlmann, Corinne Bailly, Saioa Cobo, eric saint-aman, Jennifer Wytko & Jean WEISS
Abstract The ability of three bis-viologen cyclophanes to act as redox-triggered contractile switches is investigated. Odd/even effects in the formation of cyclic bis-viologens are circumvented by ...

Cucurbit[7]uril inclusion complexation as a supramolecular strategy for color stabilization of anthocyanin model compounds

Barbara Held, Hao Tang, Palani Natarajan, Cassio Pacheco da Silva, Volnir de Oliveira Silva, Cornelia Bohne & Frank H. Quina
Complete stabilization of the color of a flavylium cation by the formation of a higher order (1 : 2) complex with cucurbit[7]uril.

Spectroscopic studies on the interaction of Safranine T with DNA in β-cyclodextrin and carboxymethyl-β-cyclodextrin

Guomei Zhang, Yuehong Pang, Shaomin Shuang, Chuan Dong, Martin M.F. Choi & Diansheng Liu

Effects of cucurbituril size on the binding of a lutidine guest

Jan Svec, Vladimir Sindelar & Angel E. Kaifer
Six- and seven-membered cucurbiturils form inclusion complexes with a lutidine derivative. These inclusion complexes differ in the binding mode, stability, kinetics of complexation, and sensitivity toward basic media.

Thermodynamics of Halide Binding to a Neutral Bambusuril in Water and Organic Solvents

Tomas Fiala, Kristina Sleziakova, Kamil Marsalek, Karolina Salvadori & Vladimir Sindelar
Driving forces of anion binding in water in contrast to nonpolar environments are of high interest because of their relevance to biology and medicine. Here we report a neutral bambusuril macrocycle (1), soluble in both water and nonpolar solvents due to decoration with 12 polyethylene glycol-based substituents. The new bambusuril has the highest affinity for I– in pure water ever reported for a synthetic macrocycle relying on hydrogen bonding interactions rather than metal coordination or...

Supramolecular interaction of cucurbit[n]urils and coptisine by spectrofluorimetry and its analytical application

Chang-Feng Li, Li-Ming Du, Wen-Ying Wu & Ai-Zhuo Sheng

Propanediurea-Based Molecular Clips Bind Halide Anions: An Insight into the Mechanism of Cucurbituril Formation

Tomas Lizal, Lukas Ustrnul, Marek Necas & Vladimir Sindelar
The synthesis and supramolecular properties of the first methylene-bridged propanediurea-based dimers are described. These dimers, bearing an aromatic sidewall, have the shape of molecular clips. Unlike glycoluril-based dimers, these clips neither dimerize nor accept any organic guests, due to their small cavities. Both propanediurea- and glycoluril-based dimers bind halide anions on the convex side of the molecules, even in highly polar organic solvents. This observation brings new insights into the mechanism of cucurbituril formation.

A hypoxia-responsive supramolecular formulation for imaging-guided photothermal therapy

Tian-Xing Zhang, Xiaoxue Hou, Yong Kong, Fan Yang, Yu-Xin Yue, Muhammad Raza Shah, Hua-Bin Li, Fan Huang, Jianfeng Liu & Dong-Sheng Guo

Registration Year

  • 2022
    14
  • 2021
    385

Resource Types

  • Dataset
    399

Affiliations

  • Nankai University
    29
  • Department of Physical and Technical Sciences
    29
  • Masaryk University
    29
  • University of Miami
    17
  • Tulane University
    17
  • Institute of Materials and Environmental Chemistry
    15
  • Institute of Nanotechnology
    15
  • Trinity University
    14
  • Institute for Basic Science
    9
  • Institute of Organic Chemistry
    8