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Abstract
Chirality plays a key role in many fields ranging from life to natural sciences. For a long time, chiral materials have been developed and used to interact with chiral environments. In recent years, fluorescent carbon dots (CDots) are a new class of carbon nanomaterials exhibit excellent optical properties, good biocompatibility, excellent water solubility, and low cost. However, chirality transfer between semiconductor CDots and organics remains a challenge. Herein, a facile one-step hydrothermal method was used to synthesize chiral CDs from cysteine (cys). The obtained chiral CDots can act as chiral templates to induce porphyrins to form chiral supramolecular assemblies. The successful transmission of chiral information provides more options for the development of various chiral composite materials and the preservation of chiral information in the future.
Highlights
Chirality is one of the most interesting phenomena in nature, which means that an object doesn’t overlap its mirror image (Wang et al, 2013)
This manuscript focuses on the introduce of L-carbon dots (CDots), more details of D-CDots are showed in Supplementary Materials
Chiral carbon dots were prepared by one-step hydrothermal method from amino acids, which were used as templates to induce the chiral J-type aggregates of H2TPPS porphyrins under the condition of pH = 2.5 and TMPyP4 porphyrins under the condition of pH = 7.0
Summary
Chirality is one of the most interesting phenomena in nature, which means that an object doesn’t overlap its mirror image (Wang et al, 2013). Compared with traditional semiconductor quantum dots and organic dyes, CDots maintain the advantages of low toxicity and good biocompatibility of carbon materials, and have the advantages of good light stability, easy functionalization, low price, and easy large-scale synthesis (Baker and Baker, 2010), that can be applied in optical devices (Tian et al, 2017), biosensors (Feng et al, 2013), drug delivery (Gong et al, 2019), and optical imaging (Han et al, 2019). The chiral CDots can act as chiral templates to induce organic porphyrins to form supramolecular assemblies. The L(D)-CDots+TMPyP4 solution was prepared by incubating TMPyP4 (100 μM) with chiral carbon dots (150 μg/mL) at pH = 7.0 for 24 h. Each CD spectrum was an average of at least three scans
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