Related Experiment Video
Updated: Nov 26, 2025

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Stimuli-Responsive Self-Sorting Hybrid Hydrogen-Bonded/Metal-Coordinated Cage
Petr Motloch1, Christopher A Hunter1
1Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
Researchers created a novel hybrid molecular cage using hydrogen bonds and metal coordination. This unique structure self-assembles and selectively disassembles in response to specific stimuli, showcasing its dual character.
Area of Science:
- Supramolecular Chemistry
- Coordination Chemistry
- Materials Science
Background:
- Self-assembly is a fundamental process in creating complex molecular structures.
- Hybrid systems combining different interaction types offer unique properties.
- Molecular cages are important for encapsulation and controlled release applications.
Purpose of the Study:
- To report the self-assembly of a novel hybrid molecular cage.
- To investigate the formation of a cage through combined hydrogen-bonding and metal-coordination.
- To demonstrate the selective response and disassembly of the hybrid cage.
Main Methods:
- Utilized a hydrogen-bonded rosette motif.
- Incorporated palladium(II)/platinum(II) coordination with a pyridine ligand.
- Employed integrative self-sorting for cage preparation.
- Applied selective stimuli (phosphine, cyanurate) to induce disassembly.
Main Results:
- Successfully synthesized a hybrid cage with a defined topology.
- Demonstrated cage formation via self-assembly from simple components.
- Showcased the integrative self-sorting capability for efficient synthesis.
- Observed selective disassembly upon exposure to specific external stimuli, confirming dual responsiveness.
Conclusions:
- The developed hybrid cage represents a novel supramolecular architecture.
- The cage exhibits a genuine dual character, responding selectively to different stimuli.
- This work opens avenues for designing responsive and switchable molecular containers.
Related Concept Videos
Valence Bond Theory
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Complexation Equilibria: Factors Influencing Stability of Complexes
Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...

