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38900354

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[交流] 水热/溶剂热法合成单晶时,加的一点点硝酸的作用是什么?

有的文献报道,在合成单晶时,用羧酸做配体,水热或溶剂热的方法合成,有时候要加那么一点点硝酸,不知道这样做的目的是什么?如下边的:To prepare crystals of JOU-34, a mixture of Zn(NO3)2⋅6H2O (0.045 mmol, 13.12 mg), H4TBAPy (0.015 mmol, 10.27 mg), DMF (2.5 mL), and HNO3 (60 μL, 65 wt%) were ultrasonic treated for 5 min, transferred into a 10 mL pressure-resistant glass bottle, and then heated at 120 ◦C for 72 h. Yellow block crystals were isolated by filtrating, washing with fresh DMF, and drying under air.     H4TBAPy= 1,3,6,8-tetrakis (p-benzoic acid) pyrene
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lvjie11

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7楼: Originally posted by 38900354 at 2022-02-07 21:51:48
能大致说说在什么情况下加这么一点点硝酸吗?...

我做的实验有一步是把物质溶于稀硝酸溶液,我都没想到可以控制成核速率
8楼2022-03-14 08:51:16
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38900354(金币+3): 谢谢参与
减缓成核速率,让晶体长大

发自小木虫Android客户端
4楼2022-02-05 15:54:49
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38900354

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4楼: Originally posted by 我想更懂你29 at 2022-02-05 15:54:49
减缓成核速率,让晶体长大

能大致说说在什么情况下加这么一点点硝酸吗?
7楼2022-02-07 21:51:48
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tzynew2楼
2022-02-05 15:04   回复  
38900354(金币+3): 谢谢参与
o 发自小木虫Android客户端
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