One-Step Hydrothermal Synthesis of Nitrogen-Doped Carbonized Polymer Dots with Full-Band Absorption for Skin Protection

• DOI: 10.1021/acssuschemeng.2c03324
• Publication Date: 2022-08-30T18:49:40Z
• Authors: Jiemin Qiu; Weihao Ye; Xiaokai Xu; Congcong Chen; Zhiqiang Xu; Bingfu Lei; Chaofan Hu; Jianle Zhuang; Hanwu Dong; Guangqi Hu; Yingliang Liu
• Keywords: Imine; Carbon fibers; Heteroatom; Biocompatibility; Absorption band

Long-term and excessive ultraviolet (UV) radiation will trigger various skin diseases, traditional organic inorganic sunscreens possess disadvantages such as biocompatibility being prone to aggregation. Carbon polymer dots (CPDs) are an excellent candidate for UV absorbers due their polyfunctional groups, superior stabilization, low cytotoxicity. In this study, we explored the conformational relationship of structure CPDs on full-band by synthesizing using amino acids with different structures. We proposed that acid self-assembly readily generates UVB-absorbing CPDs, increase in nitrogen-containing compounds facilitates synthesis absorbers. The efficient full-band-absorbing carbon (His-CPDs) were synthesized l-histidine ethylene imine (PEI) through a one-step hydrothermal method obtained screening. Subsequently, three absorption bands His-CPDs attributed cores at 225 nm, including saturated hydrocarbons containing oxygen, nitrogen, other heteroatoms derivatives. C═C bond induced 300 nm band, 356 was mainly from C═N formed PEI. Finally, prepared applied mice, which showed anti-UV ability high sun protection factor (SPF) compared commercial sunscreens. It is essential breakthrough made UV-absorbing properties life.