Tuning the fluorescence sensing for Fe ions by using different dipyridyl linkers in pillar-layered metal-organic frameworks

Isostructural, pillar-layered metal-organic frameworks (MOFs) will provide an ideal structural model for studying the influence of functional groups on fluorescence sensing. Here, we study dipyridyl linkers to tune the detection of Fe 3+ ions. Three isostructural analogues of pillar-layered framewor...

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Bibliographic Details
Published in:New journal of chemistry 2023-12, Vol.48 (1), p.377-383
Main Authors: Liu, Yan-E, Zhou, Ye, Li, Xiao-Yu, Yao, Jun, Li, Qiu-Xia, Xu, Quan-Qing, Zhu, Rong-Rong, Zhu, Ai-Xin
Format: Article
Language:English
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Summary:Isostructural, pillar-layered metal-organic frameworks (MOFs) will provide an ideal structural model for studying the influence of functional groups on fluorescence sensing. Here, we study dipyridyl linkers to tune the detection of Fe 3+ ions. Three isostructural analogues of pillar-layered frameworks were used as fluorescence sensors to quickly, sensitively, and selectively detect Fe 3+ ions with good repeatability. Importantly, an increase in length of the pillars and accessible volumes may lead to an increase in the fluorescence quenching constants ( K sv( PL-1 ) = 1.58 × 10 4 M −1 ) < ( K sv( PL-2 ) = 1.72 × 10 4 M −1 ) < ( K sv( PL-3 ) = 2.47 × 10 4 M −1 ), which may be related to different dipyridyl ligands acting as pillars. This study reveals that different dipyridyl linkers influence the fluorescence sensing for Fe 3+ ions in pillar-layered MOFs.
ISSN:1144-0546
1369-9261
DOI:10.1039/d3nj03489e