microwave assisted method
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2022 ◽  
Vol 6 (2) ◽  
pp. 84-87
Luthfi Ahmad Muchlashi

This study aims to compare conventional heating with microwave irradiation in order to obtain the optimal method for 3-amino-2-(2-chlorophenyl)quinazolin-4(3H)-one synthesis. For the compound to be completely synthesised, one needs to carry out much heating for a long period of time. 10 hours are required for the reaction using conventional heating; yet it takes only 5 minutes using microwave with 800 watts of power. It was found in this study that there was an improvement in percent yields of 3-amino-2-(2-chlorophenyl)quinazolin-4(3H)-one, 87 %  using microwave irradiation compared to 79 % using reflux. Therefore, microwave-assisted method is a quicker, higher yielding method for 3-amino-2-(2-chlorophenyl)quinazolin-4(3H)-one synthesis.

2021 ◽  
Vol 10 (1) ◽  
pp. 33-39
Tu Nguyen Thi Thanh ◽  
Thien Tran Vinh

In this work, zeolitic imidazolate framework-67(ZIF-67) was synthesized by using microwave-assisted method. The obtained ZIF-67 was characterized by means of scanning electron microscope (SEM), X-ray diffraction (XRD), and thermal gravity analysis (TG). The microwave-assisted method enabled to fabricate ZIF-67 with high yield rate and high specific surface areas of 1935 m2/g in relatively short time as compared to hydrothermal and solvothermal approaches. The Langmuir and Freundlich isotherm models were utilized to determine the adsorption capacity of ZIF-67. It was found that the adsorption capacity of ZIF-67 for RDB could be as high as 123,5 mg/g.

2021 ◽  
Vol 50 (5) ◽  
pp. 403
A. Rajapakshe ◽  
A. Bandara ◽  
R. Weerasooriya ◽  
L. Jayarathna

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