Temperature-induced construction of two novel metal-organic frameworks with Pb-O-Pb inorganic skeletons and fluorescent properties

• Published in: Inorganic chemistry communications Vol. 97; pp. 25 - 29
• Main Authors: Song, Jiang-Feng, Yao, Rui-Chao, Qiu, Xiao-Min, Zhang, Xiao-Yu, Su, Li-Juan, Zhou, Rui-Sha
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.11.2018
• Subjects: Inorganic skeletons; Lead; Metal-organic framework; Pillared-layer; Lead; Inorganic skeletons; Metal-organic framework; Pillared-layer
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2018.09.002

Two novel metal-organic frameworks with Pb-O-Pb inorganic skeletons, [Pb(cppc)]n (1) and [Pb3(cppc)2(Cl)(NO3)]n (2) (H2cppc = 5-(4-carboxyphenyl)pyridine-2-carboxylic acid), have been successfully synthesized through solvo-thermal method at different temperature and characterized by single-crystal X ray diffraction, elemental analysis, IR spectroscopy, thermal analysis, and powder X-ray diffraction. The result indicated that higher temperature (160 °C) favored the formation of compound 1, lower temperature (120 °C) easily resulted in the formation of compound 2. Compound 1 is a two-dimensional double-layer framework containing one-dimensional -Pb-O-Pb- inorganic chains, however, compound 2 is an infinite three-dimensional pillar-layer framework constructed from inorganic -Pb-O-Pb- layers and cppc2− as pillars simultaneously. Compounds 1 and 2 show blue light emission when excited at 270 nm. Temperature induced construction of two novel metal-organic frameworks with Pb-O-Pb inorganic skeletons. [Display omitted] •Temperature-induced construction of two novel Pb-based compounds.•Compounds 1 and 2 contain Pb-O-Pb inorganic skeletons.•Compound 1 and 2 exhibit blue light emission when excited at 270 nm.