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Updated: Jan 11, 2026
Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
Published on: November 21, 2013
2D Assemblies Based on a Tetraphenylethylene D,L-Cyclic Peptide Scaffold
Alfonso Bayón-Fernández1, Alba Torrón-Celada1, Alejandro Méndez-Ardoy2
1Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, Rúa de Jenaro de la Fuente, s/n, 15705, Santiago de Compostela, Spain.
Researchers created novel light-emitting two-dimensional (2D) nanosheets using pH-responsive cyclic peptide-tetraphenylethene (TPE) building blocks. This breakthrough enables precise control over 2D material assembly and function, opening doors for new supramolecular materials.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Nanotechnology
Background:
- Two-dimensional (2D) materials and aggregation-induced emission (AIE) fluorophores offer unique properties.
- Integrating AIE probes into 2D self-assembled systems with nanometric control is challenging due to assembly sensitivity.
Purpose of the Study:
- To develop a novel scaffold for creating light-emitting 2D materials by combining AIE fluorophores with self-assembling cyclic peptides (CPs).
- To achieve nanometric control over the self-assembly of AIE-functionalized 2D materials.
Main Methods:
- Synthesized tetrakis-(cyclopeptide) tetraphenylethene monomers using oxime bond connections.
- Exploited pH-dependent self-assembly of these monomers to form 2D macrotubular nanoarrays.
- Investigated the impact of molecular modifications on the TPE core and CP units on self-assembly and material properties.
Main Results:
- Achieved pH-dependent self-assembly of TPE-CP monomers into light-emitting 2D nanosheets.
- Demonstrated that the tetrameric CP motif tolerates diverse molecular modifications without disrupting 2D self-assembly.
- Showcased precise height control of the 2D nanosheets by adjusting the TPE core structure.
- Utilized the aligned histidine residues for enzyme mimicry, demonstrating esterase activity.
Conclusions:
- The developed TPE-CP scaffold enables the creation of functional 2D supramolecular materials with tunable properties.
- The system's tolerance to molecular diversity facilitates the design of new advanced materials.
- This work provides a versatile platform for constructing sophisticated 2D nanoarchitectures with potential applications in catalysis and sensing.
