1. Highly enantioselective photo-polymerization enhanced by chiral nanoparticles and in situ photopatterning of chirality
- Author
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Chenlu He, Sizhen Shan, Zeyu Feng, Mengqiao Wang, Xin Chen, and Gang Zou
- Subjects
Materials science ,Science ,High Energy Physics::Lattice ,General Physics and Astronomy ,Nanoparticle ,Physics::Optics ,Nanotechnology ,02 engineering and technology ,Conjugated polymers ,engineering.material ,010402 general chemistry ,01 natural sciences ,Article ,General Biochemistry, Genetics and Molecular Biology ,Silver nanoparticle ,chemistry.chemical_compound ,lcsh:Science ,Quantitative Biology::Biomolecules ,Multidisciplinary ,Diacetylene ,High Energy Physics::Phenomenology ,Enantioselective synthesis ,General Chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Polymerization ,chemistry ,engineering ,Nanoparticles ,Noble metal ,lcsh:Q ,0210 nano-technology ,Chirality (chemistry) ,Luminescence - Abstract
Chiral noble metal nanoparticles has recently gained great interest due to their potential applications including ultrasensitive chiral recognition and asymmetric synthesis. We anticipate that they could be utilized to induce asymmetric photo-polymerization reactions with high enantioselectivity and reactivity. Here, we report such a system. By employing silver nanoparticles modified with cysteine as the chiral inducer, polydiacetylene (PDA) with high chiral asymmetry was obtained from achiral diacetylene monomers triggered with unpolarized UV light. Furthermore, the helical sense of chirality can be controlled by varying the wavelength of UV irradiation. This enables a feasible and economical method to fabricate programmable 2D patterns of chiral PDA with tailored chirality distributions, such as smooth gradients in chirality and micropatterns with tailorable circularly polarized luminescence. Our finding not only opens a pathway for producing programmable chiroptical micropatterns, but also is highly valuable for deeper understanding of symmetry breaking in enantioselective photochemical reactions., Chiral nanoparticles are capable of ultrasensitive detection, characterization, and asymmetric synthesis of chiral organic and biological molecules. Here, the authors use silver nanoparticles modified with cysteine, as the sole chiral source, and unpolarized UV light, to form polydiacetylene with high chiral asymmetry from achiral diacetylene monomers.
- Published
- 2020