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Solvent-induced terbium metal–organic frameworks for highly selective detection of manganese(ii) ions.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 2/28/2019, Vol. 48 Issue 8, p2569-2573, 5p
- Publication Year :
- 2019
-
Abstract
- Highly selective detection of trace metal ions has become one of the most urgent issues in public security and living systems. Developing a highly efficient fluorescent sensor for manganese(ii) (Mn<superscript>2+</superscript>) ions is a huge challenge. Herein, by utilizing the solvent regulation approach, a pair of terbium metal–organic frameworks (UPC-36, [Tb<subscript>2</subscript>(btdc)<subscript>3</subscript>(DMF)(H<subscript>2</subscript>O)<subscript>4</subscript>]·DMF and UPC-37, [Tb<subscript>2</subscript>(btdc)<subscript>3</subscript>(H<subscript>2</subscript>O)<subscript>6</subscript>]) based on a π-electron-rich ligand (H<subscript>2</subscript>btdc = 2,2′-bithiophene-5,5′-dicarboxylic acid) has been chosen as highly efficient sensors for the selective detection of Mn<superscript>2+</superscript> ions. Interestingly, the fluorescence of UPC-36 can be quenched by Mn<superscript>2+</superscript>, Cu<superscript>2+</superscript>, Al<superscript>3+</superscript>, Cr<superscript>3+</superscript> and Fe<superscript>3+</superscript> ions, while UPC-37 can only be quenched by Mn<superscript>2+</superscript> ions. For detecting Mn<superscript>2+</superscript> ions, the limit of detection (LOD) values are calculated to be 0.813 mM and 0.715 mM for UPC-36 and UPC-37 respectively. According to the ICP results, UPC-37 has stronger interactions with Mn<superscript>2+</superscript> ions because of the more regular arrangement of ligands existing in UPC-37, so it exhibits a high sensitivity and selectivity (K<subscript>sv</subscript> = 5.25 × 10<superscript>5</superscript> M<superscript>−1</superscript>). [ABSTRACT FROM AUTHOR]
- Subjects :
- METAL-organic frameworks
X-ray diffraction
METAL ions
FLUORESCENCE
PHOTOLUMINESCENCE
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 48
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 134813623
- Full Text :
- https://doi.org/10.1039/c9dt00006b