Based on these characteristics, various molecules with amino acides were investigated on their molecular assemblies and exploitations for advanced functionalities 12. To produce chiral supramolecular biocoordination polymers (SBCPs), which exhibit unique biological characteristics and represent an excellent platform for understanding biorelated processes, amino acids are a particularly promising monomeric unit due to their remarkable molecular recognition capability, controllable chirality, and distinctive sequence-specific self-assembling properties 11. In general, they can be synthesized by introducing chiral ligands, chiral templates, chiral physical environments, or through spontaneous resolution from achiral materials without chiral auxiliaries 7, 8, 9, 10. Several optical devices based on the supramolecular chirality and other biological applications have also been reported 1, 5, 6.Ĭhiral coordination polymers (CPs) show diverse structures and topologies with many potential applications 7, 8, 9, 10. Recently, supramolecular chirality has attracted great attention due to its promising applications in chiral recognition, sensing, and catalysis 1. However, in some cases, heterochiral assemblies are spontaneously formed during phase separation in heterochiral systems this is not common since the energy difference between enantiomers is relatively small 4. In most cases, homochiral assemblies via self-recognition are more commonly formed from a mixed chiral system rather than heterochiral assemblies via self-discrimination. Chiral recognition between two homochiral pairs of the heterochiral system can lead to self-recognition or self-discrimination. Compared with homochiral assemblies, heterochiral systems are unique and largely dependent on the mixing of chiral enantiomers 1.
Chiral recognition is important in biological processes and organic synthesis 3. Self-assembly and self-organization to create higher-order functional structures play an important role in natural systems 2. These results provide guidelines for the synthesis of chiral SBCPs and demonstrate their versatility and feasibility for use in various sensors covering photoactive, chemiresistive, and chiral sensors.Ĭhirality is widespread in nature and common in the most abundant forms of matter 1. Specifically, these materials can be used for detecting hazardous amine materials due to the electron transfer from the amine to the SBCP surface and for enantioselectively sensing a chiral species naproxen due to the different binding energies with regard to their chirality.
Notably, we find that the chiral self-sorted SBCPs exhibit multifunctional properties, including photochromic, photoluminescent, photoconductive, and chemiresistive characteristics, thus can be used for various sensors. Here, we selectively synthesize homochiral and heterochiral SBCPs, composed of chiral naphthalene diimide ligands and Zn ions, from enantiomeric and mixed R-ligands and S-ligands, respectively. Particularly, chiral supramolecular biocoordination polymers (SBCPs) provide a versatile platform for characterizing biorelated processes such as chirality transcription. Chiral supramolecules have great potential for use in chiral recognition, sensing, and catalysis.
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