Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 9, pp. 1388−1391.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © L.Yu. Filippova, V.N. Shubina, N.P. Kozlova, S.B. Putin, 2013, published in Zhurnal Prikladnoi Khimii, 2013, Vol. 86, No. 9,
Adsorption Properties of the МOF-5 Metal-Organic
Framework in Relation to Water and Benzene
L. Yu. Filippova, V. N. Shubina, N. P. Kozlova, and S. B. Putin
“Roskhimzashchita Corporation,” AOOT, Tambov, Russia
Received August 24, 2012
Abstract—Adsorption properties of synthesized metal-organic frameworks based on 1,4-dicarboxylate ligands
and zinc ions were studied. It was shown that the adsorption properties of these metal-organic frameworks in
relation to water and benzene are much higher than those for the known adsorbents: KT-1 and KT-2 coals, USY
and ZSM-5 zeolites, and pentasil.
Owing to ecological problems of the last decade the
interest has increased to searching for new adsorption
materials exceeding widely used active carbons and
mineral adsorbents based on zeolites in air puriﬁ cation
from technogenic and metabolic impurities. A special
condition of the application of sorbents is a possibility
of reﬁ ning moist air, which eliminates the stage of air
drying and thus considerably simpliﬁ es the technological
process of air reﬁ ning.
The synthesis of metal-organic frameworks (MOF)
representing a new class of porous crystalline organo–
inorganic polymers was described in [1, 2].
Metal-organic frameworks are coordination polymers
formed by metals and various organic compounds as
ligands [3–6]. Such supramolecular structures are highly
porous and have high speciﬁ c surface areas (for some
representatives up to 10 400 m
) depending on the
nature of the coordinating metal and the ligand , which
is a prerequisite of their use as sorbents and catalysts in
various engineering ﬁ elds.
At present more than 13 000 various frameworks have
been synthesized mainly for separation of industrial gas
mixtures, hydrogen storage, and methane and carbon
dioxide absorption. These frameworks possess unique
properties. In addition to a high speciﬁ c surface area
and developed porous structure they are heat-resistant,
hydrophobic or hydrophilic depending on the type of the
framework and coordinating metal.
The combination of properties allows us to assume
that these substances can act as an alternative to active
coals and zeolites [8, 9]. Adsorption properties of these
frameworks, their hydrophobic or hydrophilic properties
have been studied only slightly.
The aim of this study was to synthesize the metal-
organic compound MOF-5 on the basis of terephthalic
acid and zinc, and to estimate its physicochemical and
The synthesis of metal-organic frameworks is similar
to the synthesis of zeolites with metal ions playing the
coordinating role, except that various organic ligands act
instead of silico–aluminum tetrahedra.
The metal-organic framework (MOF-5) based on
terephthalic acid and zinc was synthesized by the pro-
cedure  in a DMF medium at 105°С and autogenic
pressure within 17 h with subsequent washing-up of the
formed crystals by DMF and hot ethanol. The resulting
crystals were dried in vacuum under a pressure of 30 Pa
within 3–4 h.
The structure of the samples obtained was estimated
by the X-ray crystal analysis on a DRON-6 X-ray dif-
fractometer. The X-ray patterns of the obtained samples
closely correlate with the theoretical data , MOF-5
being a unique crystal phase of the samples.