A Luminescent Zinc(II) Coordination Polymer for Selective Detection of Fe 3+ and Cr 2 O 7 2− in Water and Catalytic CO 2 Fixation

• Published in: European journal of inorganic chemistry 2023-06, Vol.26 (16)
• Main Authors: Sahoo, Subham, Mondal, Sumit, Sarma, Debajit
• Format: Article
• Language: English
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.202300067

Fluorescence‐based detection technique using coordination polymer has been considered an attractive alternative over conventional approaches. Herein, a new luminescent zinc(II) coordination polymer, [Zn(4‐ABPT)(NIPA)(H 2 O)], SSICG‐5 , is synthesized by using a Lewis acidic Zn(II) ion, aromatic nitro group containing ligand 5‐nitroisophthalic acid (H 2 NIPA), and basic −NH 2 rich ligand 3,5‐di(pyridine‐4‐yl)‐4H‐1,2,4‐triazol‐4‐amine (4‐ABPT). SSICG‐5 can detect Fe 3+ and Cr 2 O 7 2− selectively with a LOD of 0.16 μM and 1.94 μM, respectively. Additionally, carbon dioxide (CO 2 ) fixation via one‐pot CO 2 cycloaddition reaction has significant importance for reduced waste formation, minimizing reaction time and lowering chemical usage. Zn metal centre of SSICG‐5 possesses a replaceable coordinated water molecule. The active metal sites combined with the Lewis acidic and basic sites of the ligands make SSICG‐5 an ideal bifunctional heterogeneous catalyst for efficient CO 2 cycloaddition reaction under room temperature (RT), solvent‐free conditions. Notably, SSICG‐5 exhibits near quantitative conversion (turnover number (TON) of 198) of propylene oxide to its carbonate compound under mild reaction conditions.