A tubular europium–organic framework exhibiting selective sensing of Fe3+ and Al3+ over mixed metal ions

Abstract

A luminescent europium-organic framework with tubular channels based on the H4BTMIPA ligand (H4BTMIPA = 5,5'-methylenebis(2,4,6-trimethylisophthalic acid)) was assembled and characterized. The [H2N(CH3)2](+) ions as counterions are located in the channels. The cation exchange between [H2N(CH3)2](+) and metal ions resulted in complex that can selectively sense Fe(3+) and Al(3+) ions through fluorescence quenching and enhancement, respectively.

Metal–organic framework nanosheets for fast-response and highly sensitive luminescent sensing of Fe3+

“…[14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] The pore sizes/shapes of MOFs can be systematically optimized to best match with the metal ions. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Although extensive research has been carried out on bulk-size MOFs, those exhibiting high surface area are still of few percentage, due to the labile coordination geometries of metal-oxo clusters and framework interpenetration, which limits their close interactions with targeted analytes. 6,8 However, most of the current researches on MOF fluorescent probes are focused on the design and synthesis of bulk-size MOFs.…”

White-light emission by selectively encapsulating single lanthanide metal ions into alkaline earth metal-organic coordination polymers

“…Fe 3þ is indispensable for production of many materials, so it is often found as a contaminant [29]. Therefore, it is important to monitor Fe 3þ in a selective and sensitive manner.…”

Multi-Color Luminescence and Sensing of Rare Earth Hybrids by Ionic Exchange Modification

“…This can develop a lot of rare earth hybrids based with coordination polymers, just like rare earth phosphors. On the other hand, there are a lot of metallic (including rare earth) coordination polymers with cationic dimethyl amino group (H 2 NMe 2 + ) in the DMF solution reaction systems [46][47][48][49]. So it can be expected to further introduce other rare earth ions through ionic exchange reaction with H 2 NMe 2 + .…”