10.1021/jacs.5b06637.s001
Hong Ki Kim
Hong Ki
Kim
Won Seok Yun
Won Seok
Yun
Min-Bum Kim
Min-Bum
Kim
Jeung
Yoon Kim
Jeung
Yoon
Kim
Youn-Sang Bae
Youn-Sang
Bae
JaeDong Lee
JaeDong
Lee
Nak Cheon Jeong
Nak Cheon
Jeong
A Chemical
Route to Activation of Open Metal Sites
in the Copper-Based Metal–Organic Framework Materials HKUST‑1
and Cu-MOF‑2
American Chemical Society
2015
function
HKUST
OCS
Open Metal Sites
chemical activation route
MC
activation process
MOF
2015-08-12 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/A_Chemical_Route_to_Activation_of_Open_Metal_Sites_in_the_Copper_Based_Metal_Organic_Framework_Materials_HKUST_1_and_Cu_MOF_2/2141473
Open coordination sites (OCSs) in
metal–organic frameworks
(MOFs) often function as key factors in the potential applications
of MOFs, such as gas separation, gas sorption, and catalysis. For
these applications, the activation process to remove the solvent molecules
coordinated at the OCSs is an essential step that must be performed
prior to use of the MOFs. To date, the thermal method performed by
applying heat and vacuum has been the only method for such activation.
In this report, we demonstrate that methylene chloride (MC) itself
can perform the activation role: this process can serve as an alternative
“chemical route” for the activation that does not require
applying heat. To the best of our knowledge, no previous study has
demonstrated this function of MC, although MC has been popularly used
in the pretreatment step prior to the thermal activation process.
On the basis of a Raman study, we propose a plausible mechanism for
the chemical activation, in which the function of MC is possibly due
to its coordination with the Cu<sup>2+</sup> center and subsequent
spontaneous decoordination. Using HKUST-1 film, we further demonstrate
that this chemical activation route is highly suitable for activating
large-area MOF films.