Direct Observation of Molecular-Level Template Action Leading to Self-Assembly of a Porous Framework

The molecular steps involved in the self‐assembly of Cu3(BTC)2 (BTC=1,3,5‐benzenetricarboxylic acid) metal–organic frameworks that enclose Keggin‐type H3PW12O40 heteropolyacid molecules were unraveled by using solution 17O, 31P, and 183W NMR spectroscopy, small‐angle X‐ray scattering, near‐IR spectr...

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Veröffentlicht in:Chemistry : a European journal Jg. 16; H. 13; S. 3926 - 3932
Hauptverfasser: Bajpe, Sneha R., Kirschhock, Christine E. A., Aerts, Alexander, Breynaert, Eric, Absillis, Gregory, Parac-Vogt, Tatjana N., Giebeler, Lars, Martens, Johan A.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Weinheim WILEY-VCH Verlag 06.04.2010
WILEY‐VCH Verlag
Wiley Subscription Services, Inc
Schlagworte:
Aqueous solutions
Chemistry
Complexation
Copper
Copper - chemistry
Formations
Infrared spectroscopy
Ions
Ions - chemistry
Joining
keggin heteropolyacids
Lead (metal)
Light scattering
Magnetic Resonance Spectroscopy
metal-organic frameworks
Metalorganic compounds
Metals - chemistry
Models, Molecular
Nanostructure
NMR spectroscopy
Organometallic Compounds - chemistry
polyoxometalates
Porosity
Self assembly
Solutions
Spectrophotometry, Ultraviolet
Spectroscopy
Spectrum analysis
template synthesis
Tungsten Compounds - chemistry
ISSN:0947-6539, 1521-3765, 1521-3765
Online-Zugang:Volltext
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Zusammenfassung:The molecular steps involved in the self‐assembly of Cu3(BTC)2 (BTC=1,3,5‐benzenetricarboxylic acid) metal–organic frameworks that enclose Keggin‐type H3PW12O40 heteropolyacid molecules were unraveled by using solution 17O, 31P, and 183W NMR spectroscopy, small‐angle X‐ray scattering, near‐IR spectroscopy, and dynamic light scattering. In aqueous solution, complexation of Cu2+ ions with Keggin‐type heteropolyacids was observed. Cu2+ ions are arranged around the Keggin structure so that linking through benzenetricarboxylate groups results in the formation of the Cu3(BTC)2 MOF structure HKUST‐1. This is a unique instance in which a templating mechanism that relies on specific molecular‐level matching and leads to explicit nanoscale building units can be observed in situ during formation of the synthetic nanoporous material. The template is the key: A strong noncovalent interaction between Cu2+ ions and Keggin‐type heteropolyacids leads to spatial organization that can be exploited for direct templating of a metal–organic framework (see figure; BTC=1,3,5‐benzenetricarboxylic acid).
Bibliographie:ark:/67375/WNG-CNR21386-R
CECAT
GOA
Flemish Government
FWO
istex:1F554004C0102157EAF841F89C3ACBF8592B214E
ArticleID:CHEM200903239
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
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ISSN:0947-6539
1521-3765
1521-3765
DOI:10.1002/chem.200903239