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A Eu‐Doped Y‐Based Luminescent Metal–Organic Framework as a Highly Efficient Sensor for Nitroaromatic Explosives
Author(s) -
Singha Debal Kanti,
Majee Prakash,
Mondal Sudip Kumar,
Mahata Partha
Publication year - 2015
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201403097
Subject(s) - nitrobenzene , chemistry , luminescence , acetonitrile , metal organic framework , phosphorescence , quenching (fluorescence) , photoluminescence , explosive material , solvent , trinitrotoluene , photochemistry , doping , analytical chemistry (journal) , fluorescence , organic chemistry , optoelectronics , catalysis , optics , physics , adsorption
By an isomorphous substitution strategy, a three‐dimensional metal–organic framework (MOF), [Y 1.8 Eu 0.2 (PDA) 3 (H 2 O) 1 ] · 2H 2 O ( 1 ; PDA = 1,4‐phenylenediacetate), has been synthesized by solvent‐assisted liquid grinding and direct heating. Dehydrated 1 ( 1′ ) shows strong red photoluminescence through the antenna effect upon excitation at 240 nm. The red emissive property was used for the visual detection of nitroaromatic explosives in acetonitrile through luminescence quenching. Importantly, 1′ exhibited high sensitivity towards the sensing of 2,4,6‐trinitrophenol (TNP), 1,3‐dinitrobenzene (DNB), 2,4‐dinitrotoluene (DNT), 4‐nitrotoluene (NT), and nitrobenzene (NB) at very low concentrations (0 to 20 μ M ). The estimated K SV (quenching constant based on linear Stern–Volmer plots) values are in the range 15.9 × 10 4 –1.1 × 10 4 M –1 , which are amongst the highest values known for nitroaromatic‐sensing materials. For 1′ , sensing of TNP down to 23 ppb has been achieved.