Colorimetric and luminescent sensing of DMF by crystalline non-porous pyrene-based coordination compounds†
‡a
Patricia
Jiménez-Hernández,
‡a
E. Carolina
Sañudo,
cd
Jose Sanchez
Costa
*ae
and
Esther
Resines-Urien
*a
Abstract
Here, two non-porous coordination compounds, [Co2(trz-pyr)5(NCS)4]·3MeOH (1) and [Fe2(trz-pyr)5(NCS)4]·3MeOH (2), are presented as promising new materials for N,N-dimethylformamide (DMF) sensing. Unlike conventional metal organic-frameworks (MOFs), these non-porous compounds achieve “porous-like” behavior through crystal lattice reorganization upon DMF exposure. Crucially, both compounds demonstrate clear color changes when exposed to DMF vapors: compound 1 shifts from orange to green, and compound 2 changes from orange to dark red. This visual response is further supported by changes in their photoluminescence spectra, with a doubling of emission intensity, and confirmed by PXRD and FTIR data. These findings highlight the potential of these non-porous coordination compounds for developing sensitive and selective DMF sensors with real-time monitoring capabilities.
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