Ammonia-sensitive metal-organic gel composite soft material with enhanced aggregation and luminescence and its preparation

[0034] Synthesis of salicylhydrazide: Mix 11 mL of methyl salicylate and 7 mL of hydrazine hydrate, add 20 mL of absolute ethanol; reflux at 75°C for 3 hours, cool to precipitate a solid, filter, and recrystallize with ethanol to obtain a white crystal that is salicylhydrazide ;

[0035] Synthesis of 4,4'-dicarboxylic acid diphenyl ether: Weigh 10 mmol of 4,4'-dicarboxylic acid diphenyl ether into a round bottom flask, add 20 mL of SOCl 2 and 40 μL of DMF, insert a drying tube, reflux at 75°C for 9 hours, and remove unreacted SOCl by rotary evaporation 2 Obtain yellowish diformyl chloride powder;

[0036] Synthesis of 4,4'-oxobis-N'-(2-hydroxybenzoyl)benzohydrazide (4,4'-OBHBBH): Weigh phenylene ether dicarbonyl chloride (10 mmol) into a round bottom flask Add DMF (10mL) to dissolve, then add dropwise a mixed solution of salicylhydrazide (24 mmol) in DMF (10mL) and triethylamine (1.4mL) in an ice bath, and then move to reflux reaction in an oil bath at 90°C 9 hours; DMF was...