BODIPY Immobilized MCM‐41 Based Multianalyte Sensor: Application in Detection and Removal of Trivalent (Al3+, Cr3+) and Divalent (Cu2+, Hg2+) Metal Ions in Aqueous Media

• Published in: European journal of inorganic chemistry Vol. 26; no. 7
• Main Authors: Chaudhary, Garima, Pratap Singh, Amit
• Format: Journal Article
• Language: English
• Published: WEINHEIM Wiley 01.03.2023; Wiley Subscription Services, Inc
• Subjects: Aluminum; Aqueous solutions; BODIPY; Chemical sensors; Chemistry; Chemistry, Inorganic & Nuclear; Chemoreceptors; Copper; Ethylenediaminetetraacetic acids; Inorganic chemistry; Ions; MCM-41; Mercury (metal); Mesoporous materials; Multianalyte chemosensors; Physical Sciences; Science & Technology; Sensors; Trivalent chromium; BODIPY; Multianalyte chemosensors; HEAVY-METALS; SELECTIVE FLUORESCENT; MCM-41; Mesoporous materials; FUNCTIONALIZED MESOPOROUS SILICA; ALUMINUM; FE3; EFFICIENT REMOVAL; Sensors; ORGANIC FRAMEWORK; PROBE; FLUORESCENT CHEMOSENSOR; WATER
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.202200537

In the present study, a novel p‐phenylcarboxylic acid BODIPY (L) immobilized MCM‐41 based solid chemosensor material L‐propylsilyl@MCM‐41 (MS4) was developed to detect multiple metal ions in a pure aqueous medium. The synthesized solid chemosensor material MS4 shows high sensitivity and removal ability towards trivalent (Al3+, Cr3+) and divalent (Cu2+, Hg2+) metal ions. The emission intensity of MS4 enhanced multifold selectively in the presence of trivalent (Al3+, Cr3+) metal ions and shows quenching in the presence of divalent (Cu2+, Hg2+) metal ions. The limit of detection was calculated to be in the nanomolar range with Al3+, Cr3+, Cu2+, and Hg2+ metal ions in the aqueous medium. The spectroscopic and analytical results suggest that MS4 selectively binds with Al3+ and Cr3+ through −NH functionality and with Hg2+ and Cu2+ through −COOH functionality of p‐phenylcarboxylic acid BODIPY (L). Further, MS4 selectively removes Al3+, Cr3+, Cu2+, and Hg2+ metal ions from the aqueous media with removal efficiency of 97.28 %, 96.34 %, 87.19 %, and 95.63 %, respectively. No noticeable change in the concentration was observed for other metal ions. The recycling potential of MS4 was evaluated using EDTA for up to seven cycles with no significant reduction in sensing capability. The p‐phenylcarboxylic acid BODIPY derivative was synthesized and immobilized on MCM‐41 to produce solid mesoporous sensing material L‐propylsilyl@MCM‐41 (MS4). The synthesized material MS4 was used to detect and remove divalent (Cu2+, Hg2+) and trivalent (Al3+, Cr3+) metal ions from an aqueous medium. The BODIPY immobilized MS4 shows turn‐ON fluorescence in the presence of Al3+ and Cr3+ metal ions and turn‐OFF fluorescence in the presence of Hg2+ and Cu2+ metal ions.