Methanol Sensing by a Luminescent Zinc(II)‐Based Metal−Organic Framework. Issue 3 (21st March 2019)

• Record Type: Journal Article
• Authors: Durini, Sara; Ilić, Nebojša; Ramazanova, Kyzgaldak; Grell, Toni; Lönnecke, Peter; Hey‐Hawkins, Evamarie
• Is Part Of: ChemPlusChem. Volume 84:Issue 3(2019)
• Page Start: 307
• Page End: 313
• Publication Date: 2019-03-21
• Subjects: luminescence -- metal-organic frameworks -- methanol -- sensors -- zinc; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cplu.201900109
• Languages: English
• ISSNs: 2192-6506

Abstract

Abstract: A luminescent zinc‐based metal‐organic framework (MOF;1 ) was synthesized from a highly conjugated tridentate ligand, 1, 3, 5‐tris[(1 E )‐2′‐(4′′‐benzoic acid)vinyl]benzene. X‐ray single crystal analysis reveals the organization of1 in a three‐dimensional porous framework. Thermogravimetric analysis shows that1 has a good thermal stability, and resists decomposition up to 420 °C. The removal of the solvent molecules from the cavities leads to a temporary loss of crystallinity, which can be regained by heating the MOF in diethylformamide, the solvent used for the synthesis, as shown by powder X‐ray diffraction. In addition, 1 shows luminescent features influenced by the chemical environment, making it suitable as optical sensor. Detection of methanol with a turn‐on effect was possible in low concentration in mixtures with water (50 μL/3 mL and 10 μL/3 mL) and as vapor. Abstract : A Zn II ‐based metal‐organic framework containing tris[(1 E )‐2′‐(4′′‐benzoic acid)vinyl]benzene shows luminescent properties, with significant change of emission intensity when suspended in different solvents. A notable turn‐on effect of the emissive features of1 is triggered in the presence of methanol, both in a mixture with water and as vapor.