Journal ArticleDOI
Carbon-13 NMR chemical shifts. A single rule to determine the conformation of calix[4]arenes
TLDR
The conformations of calix [4] arenes can be deduced from the 13 C NMR chemical shift of the methylene groups connecting each pair of aromatic rings.Abstract:
The conformations of calix [4] arenes can be deduced from the 13 C NMR chemical shift of the methylene groups connecting each pair of aromatic rings. Inspection of 24 cases revealed that when the phenol rings beside each methylene are in a syn orientation (i.e., in cone conformations), the methylene signals appear aroung δ31, whereas they appear around δ37 when both phenol rings are anti oriented (i.e., in 1,3-alternate conformations). Steric effects are believed to be the main cause of such large differencesread more
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Host–guest chemistry of calixarene capsules
TL;DR: Reversible encapsulation is one of the more recent forms of molecular recognition as mentioned in this paper, where small molecule targets are completely surrounded by larger molecular assemblies and steric barriers keep the guest from escaping the host.
Journal ArticleDOI
Calixarene – Makrocyclen mit (fast) unbegrenzten Möglichkeiten
TL;DR: In this article, Resorcin bei der Kondensation mit einer Vielzahl von Aldehyden cyclische Tetramere with dem gleichen Grundgerust (Resorcarene) erklart den Namen Calixaren (calix = Kelch).
Journal ArticleDOI
Calix[4]arene-based, Hg2+ -induced intramolecular fluorescence resonance energy transfer chemosensor.
Amel Ben Othman,Jeong Won Lee,Jiasheng Wu,Jong Seung Kim,R. Abidi,Pierre Thuéry,Jean Marc Strub,and Alain Van Dorsselaer,Jacques Vicens +8 more
TL;DR: A novel calix[4]arene-based chemosensor 1 based on Hg2+-induced fluorescence resonance energy transfer (FRET) was synthesized, and its sensing behavior toward metal ions was investigated by UV/vis and fluorescence spectroscopies.
Journal ArticleDOI
Biopharmaceutical applications of calixarenes
TL;DR: An overview of the studies, by our group and other research groups, that led to the elucidation of biological and biopharmaceutical activity of these calixarenes can be found in this article.
Journal ArticleDOI
Calix[n]arene‐Based Glycoclusters: Bioactivity of Thiourea‐Linked Galactose/Lactose Moieties as Inhibitors of Binding of Medically Relevant Lectins to a Glycoprotein and Cell‐Surface Glycoconjugates and Selectivity among Human Adhesion/Growth‐Regulatory Galectins
Sabine André,Francesco Sansone,Herbert Kaltner,Alessandro Casnati,Jürgen Kopitz,Hans-Joachim Gabius,Rocco Ungaro +6 more
TL;DR: Calix[n]arenes proved especially effective for the plant AB‐toxin, in the solid‐phase model system with a single glycoprotein (asialofetuin) and with human tumor cells in vitro, andBioactivity of galactose‐/l lactose‐presenting calix[ n]arene for medically relevant lectins and selectivity within the family of adhesion/growth‐regulatory human galectins were revealed.
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