ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Two new frameworks for biphenyl-3,3′,5,5′-tetracarboxylic acid and nitrogen-containing organics

Wen-Jie Zhao, Jin-Ting Tan, Xia Li, Ying-Li Lu, Xing Feng, and Xu-Wu Yang

Department of Biochemical Engineering, Xianyang Vocational Technical college Xianyang, Xianyang, 712000, China

E-mail: yangxuwu@nwu.edu.cn

Abstract: Two complexes, {Zn(bptc)_0.5(bib)} _n (I) and {Mn₂(bptc)(pip)(H₂O)} _n (II) (H₄bptc = biphenyl-3,3′,5,5′-tetracarboxylic acid; bib = 1,4-bis(2-methylimidazol-1-yl)butane; pip = 2-phenyl-1H-imidazo[4,5-f][1,10]phenanthroline) were synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, IR, TGA and solid fluorescence spectra. The results show that I and II both have 3D network architectures. I has porous architecture with a 16² topology structure. Effective porosity calculated by Platon is 5.5 %. Moreover, it has a two-fold interpenetrating structure allowed by a 70.73° torsion between the benzene rings of the bptc⁴⁻ ligand and the flexibility of bib. II has a tetranuclear structure composed of binuclear architecture units with the torsion of 43.44° between the benzene rings of the bptc⁴⁻ ligand. TGA shows that the skeletons of I and II are stable up to 372°C and 553°C, respectively. I exhibits fluorescence.

Keywords: biphenyl-3,3′,5,5′-tetracarboxylic acid – nitrogen-containing organics – parallel interpenetrating – polynuclear – solid fluorescence

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-014-0584-0

Chemical Papers 68 (10) 1415–1420 (2014)