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Chapter 2 7
2.2 Definition, Chemistry and features of MOFs
2.2.1 Definition and nomenclature of MOFs
The IUPAC group recommends the following definition of MOFs: “A metal–organic
framework, abbreviated to MOF, is a coordination network with organic ligands containing
potential voids.” Moreover, the hierarchical terminology is also recommended, where the
most general term is CP, followed by the coordination networks acting as a subset of CPs
and MOFs, a further subset of coordination networks (Figure 2.3). [5] It is worth
mentioning that other terms like “porous CPs” or “porous coordination network”, which
have basically the same meaning as MOFs, are also present in many scientific publications.
In addition, another term “hybrid inorganic-organic material” was occasionally used for
MOFs, however is not recommended by the IUPAC group due to its imprecise description.
Owing to the cumbersome work, the systematic nomenclature of MOFs has not been given
yet. Nevertheless, assigning to some conceptually important compounds the trivial names
or nicknames in accordance with place of their origin followed by a number, such as
HKUST-1 (Hong Kong University of Science and Technology), MIL-53 (Matériaux de
l′Institut Lavoisier) and UiO-66 (Universitetet i Oslo), is also acceptable.
Figure 2.3. The hierarchical terminology of the CPs, coordination networks and MOFs based on
the recommendations of the IUPAC group.