scholarly journals Ester-imidazoline: Modification of imidazoline using MAOS (microwave assisted organic synthesis) method as corrosion inhibitor towards carbon steel

2020 ◽  
Author(s):  
M. I. Andra ◽  
D. U. C. Rahayu ◽  
I. Abdullah ◽  
Y. Krisnandi
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibitor ◽  
Organic Synthesis ◽  
Synthesis Method ◽  
Microwave Assisted

The Synthesis of Ethyl-1-Benzyl-5-Methyl-1H-1,2,3-Triazoles-4-Carboxylate Using Microwave Assisted Organic Synthesis Method and Determination of its Corrosion Inhibition Activity on Carbon Steel

2015 ◽  
Vol 1112 ◽  
pp. 333-337
Author(s):  
Rayyane Mazaya Syifa Insani ◽  
Deana Wahyuningrum ◽  
Bunbun Bundjali
Keyword(s):  
Carbon Steel ◽  
Organic Synthesis ◽  
Corrosion Inhibition ◽  
Electrochemical Impedance ◽  
Synthesis Method ◽  
Benzyl Bromide ◽  
Molecular Formula ◽  
H Nmr ◽  
Microwave Assisted ◽  
Two Stages

This study has successfully conducted the development method of synthesizing ethyl-1-benzyl-5-methyl-1H-1,2,3-triazoles-4-carboxylate utilizing Microwave Assisted Organic Synthesis (MAOS) method. Synthesis has been carried out in two stages. The first stage was the formation of benzyl azide (1) from the reaction between sodium azide and benzyl bromide using conventional method. In the second stage, product 1 was reacted with ethyl acetoacetate in the catalytic base of potassium carbonate using MAOS method to form ethyl-1-benzyl-5-methyl-1H-1,2,3-triazoles-4-carboxylate (2) with melting point of 75-77 °C and chemical yields of 37.5%. Measurement of compound 2 using mass spectroscopy TOF MS ES+ showed peak at 245.1244 corresponding to molecular formula C13H15N3O2. Structure elucidation has been confirmed through IR, 1H NMR, and 13C NMR spectroscopies. Corrosion inhibition test of compound 2 was conducted using Electrochemical Impedance Spectroscopy (EIS) on carbon steel in 1% (w/v) NaCl saturated with CO2. The largest corrosion inhibition efficiency of 2 was obtained at 45 °C and the concentration of 70 ppm, which is 91.54%. The ∆Gadsvalue of compound 2 at room temperature is 38.48 kJ/mole which corresponds to the semi-chemisorption or semi-physiosorption mechanism of compound 2 on the metal surface according to Langmuir adsorption isotherm.

Synthesized 2,4,5-Triphenylimidazole as Precursor of Organic Light Emitting Diode (OLED) Material

2014 ◽  
Vol 896 ◽  
pp. 468-471
Author(s):  
Ihsan Budi Rachman ◽  
Deana Wahyuningrum
Keyword(s):  
Melting Point ◽  
Organic Synthesis ◽  
Organic Material ◽  
Chemical Shifts ◽  
Light Emitting Diode ◽  
Synthesis Method ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Microwave Assisted ◽  
Organic Light

Current research based on fluorescent organic material has many advantages. One of advantages fluorescent organic material is as OLED (Organic Light Emitting Diode) based devices. OLED compound is rigid conjugated organic molecules. 2,4,5-triphenylimidazole (3) was synthesized by microwave assisted organic synthesis method. The first stage of synthesis is the synthesis of bibenzoyl (2) produced from the solventless oxidation reaction of benzoin (1) by atmospheric oxygen using MAOS (Microwave Assisted Organic Synthesis) method with chemical yields of 99.18% and melting point of bibenzoyl is 94-95 °C, and the FTIR spectrum showed the lost of -OH group peak at 3425.51 cm-1 and the strengthening of group C=O peak at 1672.25 cm-1. compound (3) was synthesized from the reactions between compound (2), benzaldehyde, ammonium acetate and acetic acid glacial by MAOS method with chemical yields of 69.04%. Melting point of compound (3) is 267-268°C and FTIR spectrum showed -NH group peak at 3038.53 cm-1 and C-N group peak at 1209.51 cm-1. Result of elucidation by 1H-NMR measurements of compound (3) showed a typical signal of -NH proton at chemical shifts of 9.31 ppm and the phenyl protons in the chemical shifts range of 7.46 to 7.94 ppm. UV-Vis and fluorescence spectra shown compound (3) has a potential as precursor compound of Organic Light Emitting Diode material.

scholarly journals Synthesis of imidazoline-palmitic derivative using MAOS (microwave assisted organic synthesis) method

2020 ◽  
Vol 763 ◽  
pp. 012006
Author(s):  
S Budiana ◽  
B Andreana ◽  
D U C Rahayu ◽  
D A Nurani ◽  
Y K Krisnandi ◽  
...  
Keyword(s):  
Organic Synthesis ◽  
Synthesis Method ◽  
Microwave Assisted

scholarly journals Ethylenediamine-derived imidazoline synthesis using MAOS (Microwave Assisted Organic Synthesis) method

2019 ◽  
Author(s):  
I. I. Lestari ◽  
D. U. C. Rahayu ◽  
D. A. Nurani ◽  
Y. K. Krisnandi ◽  
E. Budianto
Keyword(s):  
Organic Synthesis ◽  
Synthesis Method ◽  
Microwave Assisted

Investigation of 1-(2-benzothiazolyl)-3-methylpyrazol-5-one as a Corrosion Inhibitor for Carbon Steel in 1mol L-1 Hydrochloric Acid

2018 ◽  
Vol 10 (1) ◽  
pp. 102-115
Author(s):  
Cinthia E. B. Maia ◽  
Gilberto A. Romeiro ◽  
Márcia C. C. Veloso ◽  
Mariane F. dos Santos ◽  
Marcos V. da Silva Santana ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Corrosion Inhibitor
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