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Catalytic Synthesis of 2⁃Phenylthioethanol under Mild Conditions
Chen Shuai, Wang Rui, Gong Hong, Wei Yushi, Wang Jiale, Zhang Chi, Min Jiachen
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2⁃Phenylthioethanol was synthesized from thiophenol and ethylene carbonate using 1,5⁃diazabicyclo[4.3.0]non⁃5⁃ene (DBN) as a catalyst. The effects of catalyst type and amount, reaction time and temperature on the reaction were studied. The results showed that, the conversion of 2⁃phenylthioethanol can reach more than 90% when the reaction temperature is 50 ℃ and 100% conversion can be obtained when the reaction temperature is 90 ℃ using DBN as the catalyst, n(thiophenol)/n(DBN)=100, the reaction time 10 min. The selectivity of the catalyst of the synthetic route is 100% The paper discusses the reaction mechanism according to the theory of soft and hard acid and alkali.
2021, 41 (2): 17-20.
DOI:
10.3969/j.issn.1672-6952.2021.02.004
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LowTemperature Synthesis of Potassium Niobate by Improved SolidState Method and Its Photocatalytic Properties
Su Tingting, You Chunling, Zang Litao, Fan Chunyu, Jiang Heng, Gong Hong
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505
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Potassium Niobate was obtained by grinding the mixture of niobium formate and potassium hydroxide and small amount of water, then dried at room temperature, and finally calcined at 500 ℃ for 3 h . It can be seen from the Infrared spectroscopy that an ionexchange reaction occurred and NH3 was released during grinding. Assynthesized potassium niobate powders were used to degrade methylene blue solution under irradiation of UV, and found that the catalyst showed better photocatalytic properties, and the degradation ratio reaches to 90% after 3 h reaction.
2014, 34 (4): 18-21.
DOI:
10.3696/j.issn.1672-6952.2014.04.005
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Synthesis and Characterization of Nickel(Ⅱ) Complex of 2-Hydroxy-4-Methoxybenzophenone
WANG Rui, YANG Xiao-na, GONG Hong
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A new Nickel(Ⅱ) complex was sythesized with 2-hydroxy-4-methoxybenzophenone and NiCl2 used as raw materials, and characterized through IR, TG, UV. The results show that the complex ratio of 2-hydroxy-4-methoxybenzophenone to Nickel(Ⅱ) is 1∶2; the metal ion coordinates with oxygen atoms of -C=O and next to -OH group. Meanwhile, its thermal decomposition process is divided into three weightless stages during 120~630 ℃, of which 120~258 ℃ is the process of a coordinated water lost, and 258~630 ℃ has two thermal decomposition stages. Finally, the complex is decomposed into NiO. UV analysis indicates that thermal stability of the complex is better than that of 2-hydroxy-4-methoxybenzophenone. The complex remains the quality of absorbing ultraviolet radiation.
2009, 29 (3): 23-25.