TY - JOUR
T1 - Room-Temperature Synthesis of UiO-66 and Thermal Modulation of Densities of Defect Sites
AU - DeStefano, Matthew R.
AU - Islamoglu, Timur
AU - Garibay, Sergio J.
AU - Hupp, Joseph T.
AU - Farha, Omar K.
N1 - Funding Information:
We gratefully acknowledge financial support from the National Science Foundation (NSF; Grant DMR-1334928). M.R.D. was supported by the Department of Defense (DoD) through the National Defense Science and Engineering Fellowship (NDSEG) program. PXRD was performed at the J. B. Cohen X-ray Diffraction Facility supported by the MRSEC program of the National Science Foundation (DMR-1121262) at the Materials Research Center of Northwestern University. This work made use of the EPIC facility (NUANCE Center, Northwestern University), which has received support from the MRSEC program (NSF Grant DMR-1121262), the International Institute for Nanotechnology (IIN), and the State of Illinois, through the IIN. We thank Cornelius Audu for helpful discussions regarding the analysis of N2 sorption isotherms
Publisher Copyright:
© 2017 American Chemical Society.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/2/14
Y1 - 2017/2/14
N2 - UiO-66 is an archetypal zirconium-based metal-organic framework (MOF) that is constructed from hexanuclear zirconium oxide clusters as secondary building units (SBUs) and 1,4-benzenedicarboxylate (bdc) linkers. For the first time, a room-temperature solution-based synthesis is reported for UiO-66 and several of its derivatives, UiO-66-X (X = NH2, OH, or NO2), resulting in materials that are as porous and crystalline as those made at elevated temperatures. In addition, via modulation of the temperature at which UiO-66 is synthesized, the number of defect sites can be varied. It was found through N2 sorption isotherm analysis and potentiometric acid-base titrations that increasing the synthesis temperature from 25 to 130 °C results in a systematic decrease in the number of defect sites in UiO-66. The results suggest that, with respect to this synthetic procedure, a maximal number of defect sites is achieved [∼1.3 missing linkers per Zr6O4(OH)4(bdc)6] at a temperature of 45 °C.
AB - UiO-66 is an archetypal zirconium-based metal-organic framework (MOF) that is constructed from hexanuclear zirconium oxide clusters as secondary building units (SBUs) and 1,4-benzenedicarboxylate (bdc) linkers. For the first time, a room-temperature solution-based synthesis is reported for UiO-66 and several of its derivatives, UiO-66-X (X = NH2, OH, or NO2), resulting in materials that are as porous and crystalline as those made at elevated temperatures. In addition, via modulation of the temperature at which UiO-66 is synthesized, the number of defect sites can be varied. It was found through N2 sorption isotherm analysis and potentiometric acid-base titrations that increasing the synthesis temperature from 25 to 130 °C results in a systematic decrease in the number of defect sites in UiO-66. The results suggest that, with respect to this synthetic procedure, a maximal number of defect sites is achieved [∼1.3 missing linkers per Zr6O4(OH)4(bdc)6] at a temperature of 45 °C.
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U2 - 10.1021/acs.chemmater.6b05115
DO - 10.1021/acs.chemmater.6b05115
M3 - Article
AN - SCOPUS:85012875784
VL - 29
SP - 1357
EP - 1361
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 3
ER -