TY - JOUR ID - 138837 TI - Synthesis, characterization, band gap and optical properties of new pyromellittic diimide core dervatives JO - Eurasian Chemical Communications JA - ECC LA - en SN - 2717-0535 AU - Kadhim, Ahmed Khudhair AU - Khalaf, Muna Ismael AU - Kadhim, Mohammed AD - Department of Chemistry, College of Science, University of Baghdad, Baghdad, Iraq AD - Department of Physics, College of Science, University of Baghdad, Baghdad, Iraq Y1 - 2021 PY - 2021 VL - 3 IS - 12 SP - 872 EP - 880 KW - pyromellittic KW - diimide KW - Triazole KW - optical KW - Energy gap DO - 10.22034/ecc.2021.295157.1207 N2 - This study is an overview of recent advances in development of high performance diimide derivatives and their optical properties. It covered pyromellitic diimide that conjugated a 1,2,3-triazole heterocyclic molecules containing π-conjugated molecules, which gave the molecule optoelectronic properties. The new N-amino diimide compound [1] was prepared from hydrazine and pyromellitic dianhydride which could react with chloroacetyl chloride controlled by heat to give N,N'- bis (2-amino acetyl chloride) pyromellitic diimide [2] then react with sodium azide to give N,N'- bis (2-amino acetyl azide) pyromellitic diimide [3] that could conjugate with α-β unsaturated aldehyde derivatives when heated at 110°C for 24 hrs to give 1,2,3-triazole heterocyclic. The prepared compounds were characterized by FT-IR spectrum and 1H-NMR and physical properties. The UV-vis spectrum showed the maximum wavelength for the prepared compounds ˃200 nm where the calculated direct band gap energy from tauc model for expected transition state was about ≥ 4.7 ev. The studied energy gap for prepared compounds approved the energy gap that decreased by about 0.1 ev when their molecule had π-electron, which conjugated with π eletrons in 1,2,3-triazole heterocyclic ring. UR - https://www.echemcom.com/article_138837.html L1 - https://www.echemcom.com/article_138837_259663c6b3c4af26ba66d3d0f66a1516.pdf ER -