All manipulations involving air- and/or water-sensitive compounds were carried out with the standard Schlenk and vacuum line techniques under an argon atmosphere or in a nitrogen-filled glovebox.
Succinic anhydride (SA) and citraconic anhydride (CA) were purchased from Macklin. Propylene epoxide (PO) was purchased from Aldrich. Chromatographic purity solvents, including
toluene,
dichloromethane,
tetrahydrofuran (THF), ethanol, and flaky sodium hydroxide (CaH
2), were bought from SINOPHARM. Triethyl borane (TEB) in
tetrahydrofuran solution (1.0 mol/L),
Dimethyl succinate (DS), and dimethyl citraconate (DC) were purchased from the Tokyo Chemical Industry (TCI).
Triethylamine (TEA) was purchased from Aldrich, and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene (mTBD) and 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) were purchased from TCI. PO, TEA, DBU, DS, DC, and
toluene were refluxed over CaH
2 for 24 h and vacuum-distilled prior to use. In particular, chloroform-d for dynamic NMR characterization of amine-ester complexes was refluxed over CaH
2 for 24 h and distilled prior to use. Both the anhydrides (SA and CA) were purified by vacuum sublimation three times. The purified anhydrides were collected under an inert atmosphere and stored in the glovebox for use. Other organic reagents were used without purification.
Chu B., Liu X., Xiong Z., Zhang Z., Liu B., Zhang C., Sun J.Z., Yang Q., Zhang H., Tang B.Z, & Zhang X.H. (2024). Enabling nonconjugated polyesters emit full-spectrum fluorescence from blue to near-infrared. Nature Communications, 15, 366.