Hydrogen bonding is one of the most important intermolecular forces in molecular self-assembly or non-covalent synthesis. It is now possible to prepare rather large supramolecular assemblies (>1,000 Da) held together by hydrogen bonds between their molecular building blocks. From the standpoint of electrochemistry, this opens up interesting research avenues. This manuscript reviews recent results-mostly from the authors' own group-on the electrochemistry of systems in which hydrogen bonding plays a crucial role. First, we explore the encapsulation of redox-active centers inside large hydrogen-bonded assemblies and its effects on the kinetics and thermodynamics of the electron transfer reactions of the encapsulated center. Second, we survey the use of electrochemistry to modulate the strength of hydrogen bonding between complementary partners. In this regard, the association and dissociation of dimeric calixarene molecular capsules can be fully controlled by the oxidation state of ferrocenyl centers located nearby the hydrogen-bonding sites. Finally, we also present very recent and intriguing results on the strong electronic coupling between two equivalent ferrocenyl centers held together by four hydrogen bonds in a non-covalent dimer.
- Hydrogen bonding
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Chemical Engineering (miscellaneous)
- Physics and Astronomy (miscellaneous)
- Materials Science (miscellaneous)