A three-dimensional metal-organic framework with high performance of dual cation sensing synthesized single-crystal transformation
A layer-pillared three-dimensional (3D) metal-organic framework (MOF) BUT-26 was synthesized from a two-dimensional (2D) MOF BUT-25 through single-crystal to single-crystal (SC-SC) transformation. Two honeycomb-shaped layers were linked by formate ions forming a bilayer structure of BUT-25 . The for...
Saved in:
Published in | New journal of chemistry Vol. 44; no. 27; pp. 11829 - 11834 |
---|---|
Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
13.07.2020
|
Online Access | Get full text |
Cover
Loading…
Summary: | A layer-pillared three-dimensional (3D) metal-organic framework (MOF)
BUT-26
was synthesized from a two-dimensional (2D) MOF
BUT-25
through single-crystal to single-crystal (SC-SC) transformation. Two honeycomb-shaped layers were linked by formate ions forming a bilayer structure of
BUT-25
. The formate pillar was then exchanged by the subsequently added ligand thiophene-2,5-dicarboxylic acid (H
2
TDC), which successfully stitched the 2D layers of
BUT-25
into 3D
BUT-26
without disturbing the original honeycomb-shaped layers. Interestingly,
BUT-26
with free nitrogen and oxygen sites proved to be a highly sensitive MOF-based sensor with a limit of detection (LOD) of 0.12 μM and 0.1 μM for Cu
2+
and Fe
3+
ions, respectively. These LOD results are much lower than the minimum values of these ions in drinking water specified by the US-EPA. Sensitive detection accompanied by a visible color change in the solution and solid phase confirms that
BUT-26
can be used for colorimetric sensing of both ions.
BUT-26
, synthesized
via
a ligand exchange reaction, can detect trace amounts of Cu
2+
and Fe
3+
ions in aqueous solutions. |
---|---|
Bibliography: | Electronic supplementary information (ESI) available. CCDC For ESI and crystallographic data in CIF or other electronic format see DOI 1982536 1982537 and 10.1039/d0nj02617d |
ISSN: | 1144-0546 1369-9261 |
DOI: | 10.1039/d0nj02617d |