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A Three-Dimensional Dynamic Supramolecular "Sticky Fingers" Organic Framework.

Estefania Fernandez-Bartolome¹, José Santos¹, Arturo Gamonal¹

¹IMDEA Nanociencia, C/ Faraday 9, Ciudad Universitaria de Cantoblanco, 28049, Madrid, Spain.

Angewandte Chemie (International Ed. in English)

|December 15, 2018

Summary

Researchers created a novel dynamic crystalline framework using van der Waals forces. This material undergoes single-crystal-to-single-crystal reactions with hydrazine vapor, showing potential for molecular sensors and energy storage.

Keywords:

fullerenes single-crystal-to-single-crystal reactions supramolecular Chemistry topological chemistry van der Waals interactions

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Area of Science:

Materials Science
Supramolecular Chemistry
Crystallography

Background:

Developing advanced host-guest materials with specific functionalities is a key research area.
Exploring novel porous materials often involves complex synthesis and limited dynamic properties.
Soft interactions offer a promising route to engineer dynamic crystalline structures.

Purpose of the Study:

To demonstrate the first pure molecular dynamic crystalline framework.
To investigate single-crystal-to-single-crystal reactions in such dynamic materials.
To explore potential applications in sensing and energy storage.

Main Methods:

Design and synthesis of an organic-fullerene-based dynamic crystalline framework.
Exposure of the crystalline material to hydrazine vapors.
Analysis of structural and chemical changes using single-crystal X-ray diffraction and spectroscopy.
Control experiments in solution to confirm reaction specificity.

Main Results:

A novel dynamic crystalline framework stabilized by van der Waals interactions ('sticky fingers') was successfully synthesized.
The material underwent toposelective hydrogenation of the fullerene surface upon exposure to hydrazine vapor, exclusively in the solid state.
Macroscopic property changes were observed, indicating a responsive material.

Conclusions:

The study presents the first pure molecular dynamic crystalline framework driven by soft van der Waals interactions.
The material exhibits unique single-crystal-to-single-crystal reactivity, demonstrating controlled chemical transformations in the solid state.
The observed properties suggest potential applications as sensitive molecular sensors or advanced energy-storage materials.