Compound for light-controlled phase change and composition and preparation method thereof
A compound and composition technology, applied in the field of light-controlled phase change materials, can solve the problems of unstable connection, high cost, inconvenient application, etc., and achieve the effect of increasing stability
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Embodiment 1
[0069] Preparation of 4-tridecyloxyazobenzene
[0070] 4-hydroxyazobenzene (139mg, 0.0007mol), 1-bromotridecane (316mg, 0.0012mol), anhydrous K 2 CO 3 (966mg, 0.007mol), KI (100mg, 0.0006), and acetone (20ml) were mixed, placed in a three-necked flask, and refluxed at 68°C for 24h.
[0071] After the reflux was completed, the mixture was poured into 100 ml of cold aqueous solution to remove inorganic salts, filtered to obtain an orange-yellow solid, and the precipitate was dried to obtain a crude product.
[0072] The crude product was recrystallized with ice petroleum ether, the precipitate was filtered, placed in a vacuum oven at 60°C, and dried for 24 hours to obtain a pale yellow purified product.
[0073] The chemical formula of the obtained product is as follows.
[0074]
Embodiment 2
[0076] Preparation of 4-tridecyloxyazobenzene
[0077] 4-Hydroxyazobenzene (250.2mg, 1.26mmol), 1-bromotridecane (663.7mg, 2.52mmol), anhydrous K 2 CO 3 (1.739g, 12.6mmol), KI (180mg, 1.08mmol), and acetone (40ml) were mixed, placed in a three-necked flask, and refluxed at 65°C for 24h. After reflux finishes, the mixture is poured into 200ml of cold aqueous solution, get rid of inorganic salts, filter to obtain an orange-yellow solid, and dry the precipitate to obtain the crude product.
[0078] The crude product was recrystallized with ice petroleum ether, the precipitate was filtered, placed in a vacuum oven at 60°C, and dried for 24 hours to obtain a pale yellow purified product.
Embodiment 3
[0080] Preparation of 4-tridecyloxyazobenzene
[0081] 4-hydroxyazobenzene (208.5mg, 1.05mmol), 1-bromotridecane (394.5mg, 1.5mmol), anhydrous K 2 CO 3 (1449mg, 10.5mmol), KI (150mg, 0.9mmol), and acetone (30ml) were mixed, placed in a three-necked flask, and refluxed at 72°C for 20h.
[0082]After the reflux was completed, the mixture was poured into 150 ml of cold aqueous solution to remove inorganic salts, filtered to obtain an orange-yellow solid, and the precipitate was dried to obtain a crude product.
[0083] The crude product was recrystallized with ice n-hexane, the precipitate was filtered, placed in a vacuum oven at 60°C, and dried for 24 hours to obtain a pale yellow purified product.
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