Synthesis, crystal structure and optical property of two zinc metal organic frameworks constructed from isonicotinic acid

• Two novel metal organic frameworks have been synthesized by Zn(NO3)2 and isonicotinic acid.
• Compound 1 and reported compound 1′ are framework isomers.
• Two isomers have different optical properties and specific area due to the structure.
• There was a crystal phase transformation for 2 when it actived at 100 °C.

Two new zinc Metal Organic Frameworks(MOFs), Zn(IN)2 (1) and Zn(IN)2(NO3)(H2O) (2)(HIN = isonicotinic acid), have been synthesized and characterized by PXRD,IR, BET surface area test, uv–vis spectra, thermogravimetric analysis, fluorescent Spectra and single crystal X-ray diffraction. 1 is a 3D 3-fold interpenetrating framework. While 2 reveals a 1D chain structure. Different structures resulted in different optical properties. And there was a crystal phase transformation for 2 when it actived at 100 °C.

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