Molecular sensing and discrimination by a luminescent terbium–phosphine oxide coordination material

Abstract

PCM-15 is a robust and recyclable sensor for the effective discrimination of a wide range of small molecules. Sensing is achieved by direct attenuation of the luminescence intensity of Tb(III) ions within the material. A competition study involving trace amounts of NH3 in H2 gas shows that PCM-15 can be used to quantitatively detect trace analytes.

Photoluminescent Metal–Organic Frameworks for Gas Sensing

“…Many small molecules possessing O/N/S donor atoms can coordinate at the open metal sites (OMSs) on the pore surface of MOFs, which can facilitate non‐radiative relaxation of the excited state and lead to luminescence quench. The most representative examples are water induced luminescence quenching of lanthanide metal based MOFs, because their luminescence directly emit from the oxophilic lanthanide ions which have strong coordination ability for H 2 O, and the high‐energy O–H oscillators can effectively match electronic energy gaps of the lanthanide ions …”

Rational synthesis and dimensionality tuning of MOFs from preorganized heterometallic molecular complexes

“…Due to the benzenetricarboxylate and benzenetribenzoate aromatic ligands, the title frameworks 4dmf and 6dmf exhibit photoluminescent (PL) properties. The dependence of such properties upon the presence of a certain guest molecules in the channels of porous MOFs have been exploited in sensor applications a number of times already [12,47]. In this work porous 4dmf and 6dmf were selected to investigate their guest-dependent luminescence towards various nitroaromatic molecules, such as nitrobenzene (NB), 4-nitro-m-xylene (NX) and 2,6-dimethylnitrobenzene (DMNB).…”

Lanthanide contraction effect and white-emitting luminescence in a series of metal–organic frameworks based on 2,5-pyrazinedicarboxylic acid

“…There are many possible applications for MOFs in the areas of gas storage and separation, [17][18][19][20] heterogeneous catalysis 21,22 and sensing. [23][24][25][26][27][28] Still one of the most necessary properties for MOFs is high thermal stability and durability over a wide pH range. 29,30 With the using of rare earth elements into the framework a new subclass was created, named Lanthanide MOFs (LnMOFs) that have demonstrated their uncommon characteristics as catalysts, 31 luminescent sensors, [32][33][34] white light emitting devices 35,36 as well as their role in biomedical applications.…”