Novel metal-organic frameworks with high stability for selectively sensing nitroaromatics

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 47; no. 43; pp. 15399 - 1544
• Main Authors: Liu, Yi, Zhao, Yue, Liu, Xiao-Hui, Kang, Yan-Shang, Wang, Peng, Sun, Wei-Yin
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 21.11.2018
• Subjects: Benzaldehyde; Carbon dioxide; Crystallography; Dimensional stability; Fluorescence; Functional groups; Metal-organic frameworks; Photoluminescence
• ISSN: 1477-9226; 1477-9234; 1477-9234
• DOI: 10.1039/c8dt03551b

The stability and functionality of metal-organic frameworks (MOFs) are particularly important in considering their potential and/or practical use. Herein we report two novel aldehyde functional group-containing MOFs [Zn 2 (L)(BDC) 2 ]·2DMF·MeOH·H 2 O ( 1 ) and [Co 2 (L)(BDC) 2 ]·2DMF·2MeOH·H 2 O ( 2 ) (DMF = N , N -dimethylformamide, MeOH = methanol) achieved by reactions of mixed organic ligands of 2,4-bis[(pyridin-4-yl)methoxy]benzaldehyde (L) and 1,4-benzenedicarboxylic acid (H 2 BDC) with the corresponding metal salts under solvothermal conditions. Both 1 and 2 are 2-fold interpenetrated three-dimensional (3D) frameworks. Particularly, 1 exhibits excellent water and wide-range pH stability, and a large Q st value for carbon dioxide (CO 2 ) adsorption. Furthermore, photoluminescence (PL) studies indicate that 1 could be considered as a potential luminescent probe for detection of nitroaromatics. A Zn( ii ) framework with high stability was found to sensitively detect TNP with high selectivity and recyclability.