TY - JOUR
T1 - Europium Metal-Organic Framework Polymer Composites with Enhanced Luminescence and Selective Ferric Ion Sensing
AU - Rozenberga, Linda
AU - Bloch, Witold
AU - Gillam, Todd A.
AU - Lancaster, David G.
AU - Skinner, William
AU - Krasowska, Marta
AU - Blencowe, Anton
AU - Beattie, David A.
PY - 2024/3/22
Y1 - 2024/3/22
N2 - Ferric ions (Fe3+) play an important role in various biological and chemical processes in living organisms, natural environments, and industry. To understand these roles, a fast and accurate sensor for the selective detection and quantification of Fe3+ is highly desirable. Herein, we report the development and assessment of a luminescent europium metal-organic framework (MOF, with specific acronym EuMTA, named for the ligand used in the synthesis: 2-methoxyterephthalic acid)─polymer composite material. Immobilizing EuMTA within a cross-linked poly(2-hydroxyethyl methacrylate) (PHEMA) matrix resulted in a significant enhancement in the ligand-Eu antenna effect, as well as an increase in the Fe3+ sensing range (detection of Fe3+ at concentrations between 2 and 120 ppm) compared to native EuMTA powder (0.16-4 ppm). The PHEMA matrix also functioned to protect the embedded MOF, improving the stability of the sensor under acidic conditions, while enhancing Fe3+ ion selectivity compared to a EuMTA powder suspension. The MOF-composite sensor exhibited excellent luminescence intensity, stability over prolonged storage (21 days), and reusability. Furthermore, the application of the MOF-composite sensor for mineral processing was successfully demonstrated by monitoring Fe3+ concentrations using a simulated mineral leaching model.
AB - Ferric ions (Fe3+) play an important role in various biological and chemical processes in living organisms, natural environments, and industry. To understand these roles, a fast and accurate sensor for the selective detection and quantification of Fe3+ is highly desirable. Herein, we report the development and assessment of a luminescent europium metal-organic framework (MOF, with specific acronym EuMTA, named for the ligand used in the synthesis: 2-methoxyterephthalic acid)─polymer composite material. Immobilizing EuMTA within a cross-linked poly(2-hydroxyethyl methacrylate) (PHEMA) matrix resulted in a significant enhancement in the ligand-Eu antenna effect, as well as an increase in the Fe3+ sensing range (detection of Fe3+ at concentrations between 2 and 120 ppm) compared to native EuMTA powder (0.16-4 ppm). The PHEMA matrix also functioned to protect the embedded MOF, improving the stability of the sensor under acidic conditions, while enhancing Fe3+ ion selectivity compared to a EuMTA powder suspension. The MOF-composite sensor exhibited excellent luminescence intensity, stability over prolonged storage (21 days), and reusability. Furthermore, the application of the MOF-composite sensor for mineral processing was successfully demonstrated by monitoring Fe3+ concentrations using a simulated mineral leaching model.
KW - ferric ion sensing
KW - luminescence sensing
KW - metal ion detection
KW - metal−organic framework
KW - polymer composite
UR - http://www.scopus.com/inward/record.url?scp=85187575878&partnerID=8YFLogxK
U2 - 10.1021/acsapm.4c00111
DO - 10.1021/acsapm.4c00111
M3 - Article
AN - SCOPUS:85187575878
SN - 2637-6105
VL - 6
SP - 3544
EP - 3553
JO - ACS Applied Polymer Materials
JF - ACS Applied Polymer Materials
IS - 6
ER -