Akademik Veri Yönetim Sistemi
Polyhedron, cilt.297, 2026 (SCI-Expanded, Scopus)
Two Zn(II)-coordination polymers, namely, [Zn(μ-(Me)2abdc)(μ-mbix)]n (1) and {[Zn2(μ4-(Me)2abdc)2(μ-bisobix)]·2H2O}n (2) ((Me)2abdc: 2,2′-dimethyl-4,4′-azobenzenedicarboxylate, mbix: 1,3-bis(imidazol-1ylmethyl)benzene, bisobix: 1,4-bis(2-isopropylimidazol-1ylmethyl)benzene) were synthesized with azodicarboxylic acid and bis(imidazole) linkers. Single crystal X-ray results showed that, depending on the length and conformation of the bis(imidazole) ligands, compound 1 exhibited a 2D structure, while compound 2 formed a 3-fold interpenetrated pillared 3D framework. In 1, (Me)2abdc linker formed 1D chains with Zn(II) ions, while it generated 2D layers with Zn(II) ions in 2. The bis(imidazole) linkers further extended these structures into higher dimensions. In 2, despite 3-fold interpenetration, a porous structure was retained. The BET surface area of compound 2 was measured to be 516.77 m2/g. Moreover, it exhibited greater adsorption of CO2 (49.7 cm3/g) compared to CH4 (6.15 cm3/g) at 100 kPa and 273 K. This enhanced CO2 uptake was attributed to dipole-quadrupole interactions between CO2 and azo-groups within the pores.