@article{2928271,
    title = "Unravelling the mechanism of water sensing by the Mg2+
dihydroxy-terephthalate MOF (AEMOF-1 ‘)",
    author = "Eleutheria Papazoi and Antigoni Douvali and Stavros A. Diamantis and Giannis S. Papaefstathiou and Svetlana V. Eliseeva and Stéphane Petoud and Antonios G. Hatzidimitriou and Theodore Lazarides and Manolis J. Manos",
    journal = "Molecular Systems Design & Engineering",
    year = "2020",
    volume = "5",
    number = "2",
    pages = "461--468",
    publisher = "Royal Society of Chemistry (RSC)",
    issn = "2058-9689",
    doi = "10.1039/c9me00098d",
    abstract = "In this contribution we build upon our previous work on the MOF
[Mg(H(2)dhtp)(H2O)(2)]center dot DMAc (AEMOF-1 center dot DMAc) and
its activated dry version AEMOF-1 ‘ which has been shown to exhibit
excellent luminescence sensing properties towards water in organic
solvents. We demonstrate through combined structural and photophysical
studies that the observed changes in the fluorescence properties of
AEMOF-1 ‘ upon hydration arise from a structural transformation to the
mononuclear complex [Mg(H(2)dhtp)(H2O)(5)]center dot H2O (H(4)dhtp =
2,5-dihydroxyterepthalic acid) (1). In the latter complex, excited state
intramolecular proton transfer (ESIPT) is strongly favoured thereby
leading to enhanced and red shifted emission in comparison to AEMOF-1
center dot DMAc. Powder X-ray diffraction measurements confirmed that
complex 1 is identical to the hydrated form of AEMOF-1 center dot DMAc.
As in the case of AEMOF-1 ‘, the dry form of complex 1 (1 ‘) is also an
effective sensor for the determination of traces of water in
tetrahydrofuran (THF). This work demonstrates that the same chromophore
may exhibit very different emission properties when it exists in
different chemical environments and that these transformations may be
controlled and utilized in water sensing applications."
}