A kind of copolymer and its preparation method and application
A copolymer and reaction technology, applied in chemical instruments and methods, material excitation analysis, fluorescence/phosphorescence, etc., can solve the problems of limiting the application of luminescent polymers, difficult luminescence characteristics, etc., to achieve good water solubility, high luminous efficiency, spectral Responsive wide effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0071] The present embodiment is a preparation method of a copolymer, comprising the following steps:
[0072] S1, the preparation of bromolactide:
[0073] Take (28.8g 0.2mol) L-lactide (L-Lactide) and (39.15g 0.22mol) N-bromosuccinimide (NBS) in benzene for reflux reaction for 24h, until the lactide reaction is complete . After the reaction was completed, it was cooled to room temperature (about 25° C.), and the solvent was removed to obtain a crude product as a pale yellow solid.
[0074] The pale yellow solid of the crude product was first extracted once with dichloromethane and 1 mol / L sodium thiosulfate solution, and then twice with saturated sodium chloride solution, the organic phase was separated, the solvent was removed, and recrystallized with ethyl acetate to obtain White needle-like crystals of bromolactide (Br-Lactide).
[0075] S2, the preparation of methylene lactide:
[0076] Bromolactide (5.0 g) was dissolved in dichloromethane, triethylamine (TEA, 2.72 g...
Embodiment 2
[0083] The present embodiment is a preparation method of a copolymer, comprising the following steps:
[0084] S1, the preparation of bromolactide:
[0085] Take (28.8g 0.2mol) L-lactide (L-Lactide) and (39.15g 0.22mol) N-bromosuccinimide (NBS) in benzene for reflux reaction for 24h, until the lactide reaction is complete . After the reaction was completed, it was cooled to room temperature, and the solvent was removed to obtain the crude product as a pale yellow solid.
[0086] The pale yellow solid of the crude product was first extracted once with dichloromethane and 1 mol / L sodium thiosulfate, and then twice with saturated sodium chloride solution, the organic phase was separated, the solvent was removed, and recrystallized with ethyl acetate to obtain a white Needle crystal bromolactide (Br-Lactide).
[0087] S2, the preparation of methylene lactide:
[0088] Bromolactide (5.0 g) was dissolved in dichloromethane, triethylamine (TEA, 2.72 g) was added dropwise under ni...
Embodiment 3
[0095] The present embodiment is a preparation method of a copolymer, comprising the following steps:
[0096] S1, the preparation of bromolactide:
[0097] Take (28.8g 0.2mol) L-lactide (L-Lactide) and (39.15g 0.22mol) N-bromosuccinimide (NBS) in benzene for reflux reaction for 24h, until the lactide reaction is complete . After the reaction was completed, it was cooled to room temperature, and the solvent was removed to obtain the crude product as a pale yellow solid.
[0098] The pale yellow solid of the crude product was first extracted once with dichloromethane and 1 mol / L sodium thiosulfate, and then twice with saturated sodium chloride solution, the organic phase was separated, the solvent was removed, and recrystallized with ethyl acetate to obtain a white Needle crystal bromolactide (Br-Lactide).
[0099] S2, the preparation of methylene lactide:
[0100] Bromolactide (5.0 g) was dissolved in dichloromethane, triethylamine (TEA, 2.72 g) was added dropwise under ni...
PUM
| Property | Measurement | Unit |
|---|---|---|
| wavelength | aaaaa | aaaaa |
| emission peak | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More