Preparation method of super-molecule metal gel
A metal gel and supramolecular technology, applied in zinc organic compounds, cadmium organic compounds, lead organic compounds, etc., can solve problems such as insufficient coordination bonds
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Embodiment 1
[0022] Embodiment 1, the preparation of gel G1
[0023] (1) Preparation of compound L1 (N,N'-dicarboxymethyl-2-ethylbenzimidazole):
[0024] Take 4.00 g (42 mmol) of chloroacetic acid in a three-neck round bottom flask equipped with a reflux condenser, and adjust the pH value to 8~10 with NaOH solution, add 3.49 g (14 mmol) of 2-ethylbenzimidazole, and heat to reflux During this period, the pH value was continuously adjusted to maintain the pH value of the system at 8~10, until the pH value was stable, and then continued to reflux for 30 minutes, cooled, and added concentrated hydrochloric acid to adjust the pH value to 2~3, and a large amount of white precipitates formed. Let stand overnight, filter with suction, wash with distilled water and acetone three times respectively, and then recrystallize with water to obtain a white solid.
[0025] Melting point: 279~281°C Yield: 70%. 1 H NMR (400MHz D 2 O, ppm) δ: 7.45~7.56 (m, 4H, ), 4.65~5.01 (d, 4H), 3.03~3.05 (d, 2H), 1.10~...
Embodiment 2
[0028] Embodiment 2, the preparation of gel G2
[0029] (1) Preparation of compound L2 (N,N'-dicarboxymethyl-2-propylbenzimidazole):
[0030] Take 4.00g (42mmol) of chloroacetic acid in a three-neck round bottom flask equipped with a reflux condenser, and adjust the pH value to 8~10 with NaOH solution, add 3.86g (14mmol) of 2-propyl benzimidazole, and heat to reflux During this period, the pH value was continuously adjusted to maintain the pH value of the system at 8~10, until the pH value was stable, and then continued to reflux for 30 minutes, cooled, and added concentrated hydrochloric acid to adjust the pH value to 2~3, and a large amount of white precipitates formed. Let stand overnight, filter with suction, wash with distilled water and acetone three times respectively, and then recrystallize with water to obtain a white solid.
[0031] Melting point: 285~286 o C yield: 66%. 1 H NMR (400MHz D 2 O, ppm) δ: 7.46~7.57 (m, 4H), 4.56~4.75 (d, 4H), 1.57~1.63 (m 2H), 2.99~...
Embodiment 3
[0034] Embodiment 3, the preparation of gel G1
[0035] (1) Preparation of compound L1 (N,N'-dicarboxymethyl-2-propylbenzimidazole): same as Example 1.
[0036](2) Preparation of Gel G1
[0037] Mix compound L1 and copper sulfate in the amount of substance 1:1, add to H 2 O / DMSO mixed solution (H 2 The volume ratio of O to DMSO is 2:1), treated with 40 kHz sonication for 6 seconds, and left at room temperature to form a white fibrous gel G1. The formed gel returns to the solution state upon heating.
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