Block copolymer based on dendritic monomer, and photonic crystal, preparation method and applications thereof
A technology of block copolymers and photonic crystals, which is applied in the measurement of color/spectral properties, material analysis by optical means, and analysis by chemical reaction of materials, etc., to save time, reduce costs, and improve simplicity.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0063] Example 1 - Synthesis of Dendritic Monomer NBM
[0064]
[0065] (1) Weigh the product 2-1 (10g, 22.00mmol), dissolve it in 50mL of freshly dried tetrahydrofuran, and slowly add the suspension of lithium aluminum hydride (1.3362g, 35.21mmol) in tetrahydrofuran through a constant pressure dropping funnel , in a nitrogen atmosphere, reflux at 60°C for 1.5h. After the reaction was finished, cool to room temperature, slowly add deionized water (1.6mL), 10% by mass percent sodium hydroxide aqueous solution (1.6mL) and 4.8mL of deionized water, then add anhydrous sodium sulfate in the system, then After filtering and drying with sodium sulfate, concentrated and dried to constant weight, the yield was 90%, and the intermediate product 2-2 was obtained. 1 H NMR (400MHz, CDCl 3 ): δ=7.46-7.33(m,15H),6.70(s,2H),5.14(s,4H),5.08(s,2H),4.61(s,2H), as attached figure 1shown.
[0066] (2) Weigh 1-1 product (1.046g, 3.20mmol), 2-2 product (3g, 7.03mmol), 1-ethyl-(3-dimethylamino...
Embodiment 2
[0067] The synthesis of embodiment 2-monomer NDMA
[0068]
[0069] (1) Dissolve 2g norbornene and 7.32g diaminododecylamine with dichloromethane respectively, add very dilute norbornene dioic anhydride dropwise to very concentrated 1,12-diaminododecylamine solution, stir overnight, spin After drying, close the ring at 120°C in an oven, dissolve in 200mL of dichloromethane, the dissolution is not complete, extract with 0.2M dilute hydrochloric acid (8×100mL), remove unreacted diaminododecane, wash twice with saturated saline, and wash with Dry over anhydrous MgSO4 overnight. Pass through a silica gel column, remove impurities with dichloromethane:petroleum ether=10:1 (volume ratio), remove both ends with dichloromethane, wash out the product with methanol, and dry in vacuo to obtain white needle-like crystals with a yield of 37%. Intermediate 3-1. 1 H NMR (400MHz, CDCl 3 ):δ=8.14(s,2H),6.31(s,2H),3.50-3.43(m,2H),3.29(s,2H),3.00(s,2H),2.69(s,2H),1.78( dd, J=14.6, 7.4Hz, ...
Embodiment 3
[0072] Synthesis of block copolymer P(NAM-r-NDMA)-b-PNBM: using dichloromethane to dissolve and disperse Grubbs third-generation reagent (dichloro[1,3-bis(2,4,6-trimethylphenyl) -2-(imidazolidinylidene)][(benzylidene)bis(3-bromopyridine)ruthenium(II)), norbornene benzyl monomer, norbornene alkyl monomer and norbornene dodeca Alkylmethacrylamide monomer; the concentration of the monomer is 0.5mmol / mL, first add 159.1mg of NBM monomer, the molar ratio of catalyst and NBM monomer is 1:250, and react at room temperature for 25min. A mixture of 180.8 mg NAM and 5.76 mg NDMA monomer was added, the polymerization reaction time was 40 min, terminated with vinyl ether, and methanol precipitated three times to obtain a white solid product. The peak of the monomer at the chemical shift of about 6.2 obtained from the polymer NMR spectrum completely disappears, which proves that the conversion of the monomer is complete, as shown in the attached Figure 5 shown.
[0073]
[0074] The ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| molecular weight | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More