Photoluminescence, Unconventional-Range Temperature Sensing, and Efficient Catalytic Activities of Lanthanide Metal-Organic Frameworks

GERMÁN E. GOMEZ; ANNA KACZMAREK; RIK VAN DEUN; ELENA V. BRUSAU; GRISELDA E. NARDA; DANIEL VEGA; MARTA IGLESIAS; ENRIQUE GUTIÉRREZ-PUEBLA; MARÍA ÁNGELES MONGE

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY

WILEY-V C H VERLAG GMBH

Lugar: Weinheim; Año: 2016 vol. 2016 p. 1577 - 1588

1434-1948

Abstract: A luminescent lanthanide metal-organic framework based on Eu3+, Tb3+ and 2-phenylsuccinate (EuTb-psa) was solvothermally obtained to explore its behavior as a temperature sensor in a non-conventional temperature range, by studying the thermal evolution of both the hypersensitive 4f-4f transition 5D0→7F2 and the luminescence lifetime. The efficiency of the luminescence process was evaluated by the europium intrinsic quantum yield (QEu) and its variation as a function of temperature is also reported. The optical properties of four isostructural compounds (Pr-psa, Nd-psa, Gd-psa and Tb-psa) were investigated and compared with related ones. The energy of the triplet state of the ligand was also estimated. The samples were fully characterized by single-crystal and powder X-ray diffraction, thermal analysis and vibrational spectroscopy. The catalytic activity of a series of Ln-psa MOFs (with Ln = Sm, Eu, Gd, Tb, EuGd and EuTb) as heterogeneous catalysts was evaluated in a one-pot cyanosilylation of benzaldehyde as substrate.