10.1021/acsami.7b16380.s002
Giasemi K. Angeli
Giasemi K.
Angeli
Christina Sartsidou
Christina
Sartsidou
Styliani Vlachaki
Styliani
Vlachaki
Ioannis Spanopoulos
Ioannis
Spanopoulos
Constantinos Tsangarakis
Constantinos
Tsangarakis
Andreas Kourtellaris
Andreas
Kourtellaris
Emmanuel Klontzas
Emmanuel
Klontzas
George E. Froudakis
George E.
Froudakis
Anastasios Tasiopoulos
Anastasios
Tasiopoulos
Pantelis N. Trikalitis
Pantelis N.
Trikalitis
Reticular
Chemistry and the Discovery of a New Family of Rare Earth (4, 8)-Connected
Metal-Organic Frameworks with <b>csq</b> Topology Based on RE<sub>4</sub>(μ<sub>3</sub>‑O)<sub>2</sub>(COO)<sub>8</sub> Clusters
American Chemical Society
2017
IAST
298 K
8 Clusters
H 4 L
building unit
tunable chemical composition
isosteric heat
Xe
reticular chemistry rules
csq Topology
methyl groups
MOF -1.
New Family
RE-MOF
8 cluster
metal-organic framework
RE
COO
phenyl ring
single-crystal X-ray diffraction analysis
D 2 h symmetry
Reticular Chemistry
csq topology
results show
4- c linker
building block
MBB
rectangular-shaped 4- c linker
carboxyphenyl groups
2017-12-07 00:00:00
Dataset
https://acs.figshare.com/articles/dataset/Reticular_Chemistry_and_the_Discovery_of_a_New_Family_of_Rare_Earth_4_8_-Connected_Metal-Organic_Frameworks_with_b_csq_b_Topology_Based_on_RE_sub_4_sub_sub_3_sub_O_sub_2_sub_COO_sub_8_sub_Clusters/5706331
In recent years, the design and discovery
of new metal-organic framework (MOF) platforms with distinct structural
features and tunable chemical composition has remarkably enhanced
by applying reticular chemistry rules and the molecular building block
(MBB) approach. We targeted the synthesis of new rare earth (RE)-MOF
platforms based on a rectangular-shaped 4-c linker, acting as a rigid
organic MBB. Accordingly, we designed and synthesized the organic
ligand 1,2,4,5-tetrakis(4-carboxyphenyl)-3,6-dimethyl-benzene (H<sub>4</sub><b>L</b>), in which the two methyl groups attached to
the central phenyl ring lock the four peripheral carboxyphenyl groups
to an orthogonal/vertical position. We report here a new family of
RE-MOFs featuring the novel inorganic building unit, RE<sub>4</sub>(μ<sub>3</sub>-O)<sub>2</sub> (RE: Y<sup>3+</sup>, Tb<sup>3+</sup>, Dy<sup>3+</sup>, Ho<sup>3+</sup>, Er<sup>3+</sup>, and Yb<sup>3+</sup>), with planar <i>D</i><sub>2<i>h</i></sub> symmetry.
The rigid 4-c linker, H<sub>4</sub><b>L</b>, directs the in
situ assembly of the unique 8-c RE<sub>4</sub>(μ<sub>3</sub>-O)<sub>2</sub>(COO)<sub>8</sub> cluster, resulting in the formation
of the first (4, 8)-c RE-MOFs with <b>csq</b> topology, RE-<b>csq</b>-MOF-1. The structures of the yttrium (Y-<b>csq</b>-MOF-1) and holmium (Ho-<b>csq</b>-MOF-1) analogues were determined
by single-crystal X-ray diffraction analysis. Y-<b>csq</b>-MOF-1
was successfully activated and tested for Xe/Kr separation. The results
show that Y-<b>csq</b>-MOF-1 has high isosteric heat of adsorption
for Xe (33.8 kJ mol<sup>–1</sup>), with high Xe/Kr selectivity
(IAST 12.1, Henry 12.9) and good Xe uptake (1.94 mmol g<sup>–1</sup> at 298 K and 1 bar), placing this MOF among the top-performing adsorbents
for Xe/Kr separation.