A Multifunctional Fluorescence Europium‐Organic Framework for Turn‐On Sensing of pH and Turn‐Off Sensing of 2‐Thiazolidinethione‐4‐carboxylic Acid and Aztreonam. Issue 3 (14th December 2022)

• Record Type: Journal Article
• Authors: Tan, Zhenqi; Quan, Yue; Li, Yufen; Yang, Tao; Zhou, Xinhui; You, Yujian
• Is Part Of: Chinese journal of chemistry. Volume 41:Issue 3(2023)
• Page Start: 265
• Page End: 272
• Publication Date: 2022-12-14
• Subjects: Metal‐organic framework -- Fluorescence -- Sensors -- Antibiotic -- Absorption -- 3D; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.202200569
• Languages: English
• ISSNs: 1001-604X

Abstract

Comprehensive Summary: A luminescent lanthanide‐organic framework [Eu2 (adip)(H2 adip)(DMF)2 ]·CH3 OH (1 ) was synthesized by a solvothermal method using anthracene‐based ligand 5, 5'‐(anthracene‐9, 10‐diyl)diisophthalic acid (H4 adip). 1 possesses a 3D coordination framework, which could be rationalized as a 4, 8‐connected 2‐nodal (4 16 6 12 )(4 4 6 2 ) topological network. 1 shows an excellent linear increase in fluorescence intensity as the pH value rises from 4.8 to 7.1. Particularly, the fluorescence enhancement percentage reaches 588% for each increase of pH value, which is the highest value recorded for fluorescence pH sensing materials, promoting the sensitivity of pH detection within the physiological pH range. In addition, 1 can also specifically recognize carbon disulfide biomarkers 2‐thiothiazolidine‐4‐carboxylic acid (TTCA) and antibiotic aztreonam (ATM) by fluorescence quenching, with the K SV values of 1.02 × 10 5 L·mol –1 (0—10 μmol·L –1 ) and 4.67 × 10 5 L·mol –1 (0—50 μmol·L –1 ), the limit of detection (LOD) of 86 nmol·L –1 and 19 nmol·L –1, respectively. Among only a few cases reported, the detection sensitivities of 1 for both TTCA and ATM are the highest. The sensing mechanisms of pH, TTCA, and ATM are also discussed in detail. Abstract : A luminescent lanthanide‐organic framework 1 was synthesized based on 5, 5'‐(anthracene‐9, 10‐diyl)diisophthalic acid. 1 can act as the fluorescence turn‐on sensing material for pH detection and turn‐off sensing material for TTCA and ATM detection with the excellent sensitivities, respectively.