Organic conjugated polymers have received extensive attention due to their unique electronic properties.However,there have been relatively few reports on the dark photocatalytic reactions utilizing organic conjugated ...Organic conjugated polymers have received extensive attention due to their unique electronic properties.However,there have been relatively few reports on the dark photocatalytic reactions utilizing organic conjugated polymers.Herein,we report the successful synthesis of an organic conjugated polymer based on poly(heptazine imide)nanocrystals(CNNCs)for H_(2)O_(2)evolution and biomedical applications using a simple salt molten method and sonication-centrifugation process.The results show that these colloid CNNCs have the characteristics of photogenerated electrons accumulation and realize dark photocatalysis with high reducibility under visible light irradiation.Notably,these accumulating photogenerated electrons can reduce O_(2)in darkness to produce H_(2)O_(2).In addition,cytotoxicity tests were conducted and it was found that H_(2)O_(2)produced under dark conditions could oxidize L-arginine(L-Arg)to NO,which effectively killed tumors in the dark.This work provides an important strategy to construct organic conjugated semiconductor nanocrystals and applying them to future energy and biomedical fields.展开更多
基金supported by the National Natural Science Foundation of China(Nos.22302154,U22A20391,22078256,22202043 and 82202355)Innovation Capability Support Program of Shanxi(No.2023-CX-TD-26)+3 种基金the Programme of Introducing Talents of Discipline to Universities(No.B23025)the“Young Talent Support Plan”of Xi’an Jiaotong University(No.HG6J030)the high-level innovation and entrepreneurship talent project of Qinchuangyuan(No.QCYRCXM-2023-98)the Young and Middle-aged Scholars Project of Fujian Province(No.JAT210368).
文摘Organic conjugated polymers have received extensive attention due to their unique electronic properties.However,there have been relatively few reports on the dark photocatalytic reactions utilizing organic conjugated polymers.Herein,we report the successful synthesis of an organic conjugated polymer based on poly(heptazine imide)nanocrystals(CNNCs)for H_(2)O_(2)evolution and biomedical applications using a simple salt molten method and sonication-centrifugation process.The results show that these colloid CNNCs have the characteristics of photogenerated electrons accumulation and realize dark photocatalysis with high reducibility under visible light irradiation.Notably,these accumulating photogenerated electrons can reduce O_(2)in darkness to produce H_(2)O_(2).In addition,cytotoxicity tests were conducted and it was found that H_(2)O_(2)produced under dark conditions could oxidize L-arginine(L-Arg)to NO,which effectively killed tumors in the dark.This work provides an important strategy to construct organic conjugated semiconductor nanocrystals and applying them to future energy and biomedical fields.
