Vibrational spectroscopy investigation of defects in Zr- and Hf-UiO-66.

ABSTRACT: Defect engineering in metal-organic framework compounds has allowed for improvements in catalysis-based functionalities, gas sensing, and gas storage. Metal-organic framework UiO-66 compounds with Zr- and Hf-based metal secondary building units were studied with Raman and infrared vibrational spectroscopy. Missing linker and missing cluster defects were engineered into the crystal structure via a modulated synthesis technique. Missing cluster defects in Hf-UiO-66 are first characterized by powder X-ray diffraction (PXRD) whereby two low-angle peaks were fit to extract the relative quantity of reo topology in four defective samples. A monotonic red-shift of the Raman-active Hf-O coordination bond vibration is interpreted as a signature of missing cluster defects, resulting fro

SUBMITTER: Yost BT 

PROVIDER: S-EPMC9366761 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature