Exploring Calixarene‐Based Pseudorotaxane Architectures: Threading Ammonium Axles With an Exo‐Rim π‐Functionalized Calix[6]Arene Macrocycle
Veronica Iuliano, Paolo Della Sala, Placido Neri, Donato De Simone, Rocco Del Regno, Margherita De Rosa, Carmine Gaeta, Carmen Talotta · 2026
Read Exploring Calixarene‐Based Pseudorotaxane Architectures: Threading Ammonium Axles With an Exo‐Rim π‐Functionalized Calix[6]Arene Macrocycle by Veronica Iuliano, Paolo Della Sala, Placido Neri, Donato De Simone, Rocco Del Regno, Margherita De Rosa, Carmine Gaeta, Carmen Talotta (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/PMC13628540.txt.
Description
Veronica Iuliano and seven colleagues built a new molecular wheel and studied how rod-shaped guests thread through it, work published in 2026. The wheel is a calix[6]arene, a cup-shaped ring molecule, decorated on its outer rim with electron-rich aromatic units that deepen and widen its cavity for gripping ammonium axles.
Magnetic resonance measurements confirmed that threaded complexes, called pseudorotaxanes, formed even with bulky groups on the rim. The new wheel held one biphenyl axle more than four times as firmly as a standard comparison wheel, and its deeper cavity steered directional axles into preferred orientations. Calculations supported the picture, and the authors present the design rules as guidance for building better wheels for molecular machines.
Catalog record
| CREATOR | Veronica Iuliano, Paolo Della Sala, Placido Neri, Donato De Simone, Rocco Del Regno, Margherita De Rosa, Carmine Gaeta, Carmen Talotta |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 43027 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |