Synthesis and characterization of porous oligo(azomethine) from hydrazide-based needle-like crystal structure Schiff base: Evaluation of adsorption performance
Journal of Molecular Structure, cilt.1375, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 1375
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.molstruc.2026.146952
- Dergi Adı: Journal of Molecular Structure
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Adsorption, APS-oligomerization, Crystal violet, Oligo(azomethine), Thermal properties
- Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet
Özet
In this study, a Schiff base (HBABPH) was synthesized through a condensation reaction between 5-amino-N'1,N'3-di(benzylidene)isophthalohydrazide (ABPH) and 4-hydroxybenzaldehyde (4-HBA). The newly synthesized HBABPH was oligomerized via chemical oxidative polymerization by ammonium persulfate (APS) at 50 °C. The HBABPH and Oligo-(HBABPH) were characterized by FT-IR, 1H-13C-NMR, GPC, CV, UV–Vis, SEM, Brunauer Emmett Teller (BET), X-RD and TGA. X-RD analyses revealed that x has a crystalline structure while y has an amorphous structure. The limiting oxygen index (LOI) values for HBABPH and Oligo-(HBABPH) were determined to be 28.27% and 37.37%, respectively, based on thermogravimetric analysis (TGA). Cyclic voltammetry (CV) analysis determined the electrochemical band gap (Eg') values of HBABPH and Oligo-(HBABPH) to be 2.78 eV and 1.88 eV, respectively. The optical band gap (Eg) values for HBABPH and Oligo-(HBABPH) were determined to be 3.16 and 2.86 eV, respectively, from UV analysis. Oligo-(HBABPH) has a small band gap and therefore possesses semiconductor material potential. According to SEM data, HBABPH consisted of needle-like, rod-shaped crystals, while Oligo-(HBABPH) had a porous structure. The surface area and average pore diameter of Oligo-(HBABPH) were determined to be 21.31 m2 g-1 and 5.90 nm, respectively. Crystal violet (CV) was removed from aqueous solution utilizing oligo-(HBABPH) as the adsorbent. The Weber-Morris, Reichenberg, pseudo-first-order (Lagergren), and pseudo-second-order (Ho-McKay) kinetic models were applied to analyze the adsorption kinetic data. The CV adsorption kinetics on Oligo-(HBABPH) align with the pseudo-first-order kinetic model, as demonstrated by R2 and Δqe (%) validation methods.