Acid-catalyzed Condensation of Phenothiazine with Formaldehyde
AP 21 – 07 – 600 315
Chemicals [CAS] | Chemicals | MW [g/mol] | Density [g/mL] | Amount [mmol] | Mass / Volume |
92-84-2 | Phenothiazine | 199.27 |
| 2.5 | 500 mg |
50-00-0 | Formaldehyde (36% in H2O) | 30.03 |
| 4 | 120 mg / 320 µL |
7647-01-0 | Hydrochloric acid (37%) | 36.46 | 1.2 |
| 500 µL |
64-19-7 | Acetic acid | 60.05 | 1.049 | solvent | 20 mL |
Keywords | Polyphenothiazines, polycondensation, copolymer, acid catalysis |
Instrument | Monowave 300 |
Description | An 80 mL quartz vessel was charged with the substrates and the solvent. HCl was added and the vessel was sealed and immersed in the casing. The reaction vessels (4 or 8) were placed n the rotor and the rotor top plate was fixed with the screws. The rotor was closed with the lid an subjected to microwave irradiation. |
Workup | After cooling the precipitate was filtered and washed with warm MeOH. The product was dissolved in THF and reprecipitated from MeOH. |
Comments | The microwave process was compared to conventional heating and solid-phase synthesis. The resulting copolymer was used to modify graphite electrodes for redox applications. |
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References | C. Christea et al., Stud. Univ. Babes-Bolyai Chem. 2007, 21–29 |
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