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A Bispyrazole Based Porous 2D Luminescent MOF for the Turn‐Off Detection of Pd(II) Ions
Author(s) -
Kumar Sushil,
Kaushal Jolly,
Singh Siddhant,
Sharma Vikas,
Kumar Arun,
Tomar Kapil
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201902151
Subject(s) - alkene , luminescence , fluorescence , ion , detection limit , quenching (fluorescence) , chemistry , supramolecular chemistry , photochemistry , metal ions in aqueous solution , ligand (biochemistry) , inorganic chemistry , materials science , crystallography , crystal structure , catalysis , organic chemistry , biochemistry , physics , receptor , optoelectronics , chromatography , quantum mechanics
A novel bispyrazole based porous MOF ({[Zn(MBPz)(Ene) 0.5 ]⋅2DMF⋅2H 2 O} n ( 1 )) with open alkene (‐HC=CH‐) and nitrogen sites has been synthesized, as an efficient fluorescent sensor for Pd(II) ions. The MOF exhibits 3D supramolecular structure with open channels having 27.2% porosity. The unsaturated ‐CH=CH‐ moieties are present along the walls of open channels which is favorable for interaction with guest moieties. The cation sensitivity of 1 was evaluated using a series of transition metal ions in DMF. The fluorescence quenching of 1 was demonstrated by an approximately 94% reduction in the emission intensity upon binding to Pd 2+ ions. The emission intensity of 1 at 414 nm has shown a linear response to Pd(II) ion concentration with a detection limit of 4.7 x 10 −7 M. The sensing property of 1 towards Pd(II) ions is attributed to the π electron donation from the alkene bonds present in the ligand (Ene).