Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 133, Issue 10, Pages 3365-3371Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja106095w
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Funding
- National Science Foundation [DMR-0801329, AGS-0927944]
- University of Iowa
- Office of Science, Office of Basic Energy Sciences, the Division of Chemical Sciences, Geosciences, and Biosciences
- Division of Materials Sciences of DOE at the ALS [DE-AC03-76S00098]
- Division of Materials Sciences of DOE at the LBNL [DE-AC03-76S00098]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0801329] Funding Source: National Science Foundation
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Metallogels form from Cu(II) ions and tetratopic ligand rctt-1,2-bis(3-pyridyl)-3,4-bis(4-pyridyl)cyclobutane. The tetrapyridyl cyclobutane has been synthesized in the organic solid state. The gel forms with a variety of counteranions and gels water. The hydrogel is thixotropic and is composed of nanoscale metal-organic particles (NMOPs), a high surface area of which likely accounts for the gelation of the polar aqueous medium. A shear stress profile of the thixotropic hydrogel gave a yield value of 8.33 Pa. A novel combination of atomic force microscopy (AFM) and scanning transmission X-ray microscopy (STXM) is used to assess the densities of individual NMOPs. A density of 1.37 g/cm(3) has been determined. A single-crystal X-ray diffraction study demonstrates the ability of the unsymmetrical cyclobutane 3,4'-tpcb to self-assemble with Cu(II) ions in [Cu-2(hfac)(4)(3,4'-tpcb)](infinity) (where hfac is hexafluoroacetylacetonate) to form a solvated 1D coordination polymer.
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