کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5139562 | 1495182 | 2017 | 7 صفحه PDF | دانلود رایگان |
- A new (p-toluidine) oligomer (PTO) was synthesized.
- Chemical oxidative polymerization by potassium dichromate as an initiator was employed.
- Solvatochromism of PTO was studied in different polarities solvents.
- PTO was successfully used as an acid-base indicator.
A new (p-toluidine) oligomer (PTO) was facile synthesized and economically routed via chemical oxidative polymerization by potassium dichromate as an initiator in an acidic aqueous medium at room temperature. The characterization of (p-toluidine) oligomer (PTO) has been described by various techniques including Fourier transform infra-red (FTIR), UV-Visible measurements, Mass spectra, H NMR, and thermal gravimetric analysis (TGA). Solvatochromism of PTO was studied in different polaritiy solvents such as acetic acid, acetone, dimethyl formamide, ethanol, isopropanol, chloroform, p-xylene, dichloromethane and carbon teterachloride. The absorption bands were bathochromically shifted with increased polarity of the solvent (positive solvatochromism). PTO shows three isosbestic points at 333, 388 and 472Â nm in a binary mixture of acetone and chloroform. The deprotonation constants of PTO were found to be 3.1 and 5.8, based on spectrophotometric calculations. PTO was successfully used as an acid-base indicator; the acid solution color sharply turned from pink (acidic medium) to yellow (basic medium) at the end point.
Graphical Abstract110
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 187, 5 December 2017, Pages 61-67