Triethylamine

Graphene powder, folic acid (FA), 3-ammonia propyl-triethoxy silane (APTES), dicyclohexyl carbon imine (DCC), 4-dimethylaminopyridine (DMAP) and doxorubicin hydrochloride (DOX) were purchased from Aladdin Industrial Corporation.
Anhydrous ethanol, dimethyl sulfoxide (DMSO), ferric chloride and ferrous chloride were obtained from Tianjin Hengxing chemical reagent Co. Ltd. Maltodextrin (MD, 99%) was purchased from Shanghai Ciwei Chemical Technology Co., Ltd. Pyromellitic dianhydride (PDA) was purchased from Shanghai McLean Biochemical Technology Co., Ltd. Triethylamine is analytical pure, purchased from Tianjin Damao Chemical Reagent Company. Ammonia solution (NH₃, 25%) was supplied by Tianjin Beichen Reagent Factory. Phosphate Buffer Saline (PBS, pH 7.4) and 4′,6-diamidino-2-phenylindole (DAPI) were obtained from Boster Biological Technology Co., Ltd. Deionized water (DI water) was obtained from PURELAB Classic UVF system (ELGA, UK).

L-cystine was purchased from Dipper Biotechnology Co., Ltd. (Shanghai, China). Acrylic chloride, aqueous ammonia (28 wt%), paclitaxel (PTX), glutathione (GSH), 2,2-Azobisisobutyronitrile (AIBN), and dithiothreitol (DTT) were purchased from Sun Chemical Technology (Shanghai, China) Co., Ltd. The AIBN was used after recrystallization in ethanol. Methanol, tetrahydrofuran (THF) and diethyl ether were purchased from Hengxing Chemical Preparation Co., Ltd (Tianjin, China). Triethylamine and thionyl chloride were purchased from Damao Chemical Reagent Factory (Tianjin, China). Methanol and THF were dried with CaH₂ and distillated before use.