Structural, Thermal and Transport Properties of 1,2,9-trimethyl-7H-furo[3,2-f]chromen-7-one]

Document Type : Original articles

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1 physics department Faculty of science Damietta University

2 New Damietta city, Damietta

3 Faculty of Science, Damietta University, Egypt

Abstract

A coumarine derivative namely1,2,9-trimethyl-7H-furo[3,2-f]chromen-7-one] (TFC) is subjected to investigate thermal (TGA, DTG and DSC) structural, and AC conduction properties are done in dark and in air. The XRD investigation showed that TFC in powder form is polycrystalline and demonstrates monoclinic crystal system. Thermo-grave metric analyses proved that TFC has a good thermal stability from room temperature up to approximately 460 K. furthermore, it undergoes decomposition in one major step in the temperature range 460 – 583 K. Ac and dc electrical conductivity measurements revealed that TFC showed a semiconductor behavior. The thermal activation energy for DC conductivity ΔEdc are found to be 0.0576 and 0.617 eV in the low and high temperature regions, respectively. The analyses of AC conductivity as a function of temperature and frequency revealed that the correlated barriers hoping (CBH) conduction mechanism is the dominant mechanism for conduction of charge carriers in TFC. The related parameters for the CBH are calculated.

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Scientific Journal for Damietta Faculty of Science
Volume 15, Issue 2
August 2025
Pages 237-246

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