@article {161,
	title = {Thixotropic Hydrogel Derived from a Product of an Organic Solid-State Synthesis: Properties and Densities of Metal-Organic Nanoparticles.},
	journal = {Journal of the American Chemical Society},
	volume = {133},
	year = {2011},
	note = {CAPLUS AN 2011:232592(Journal; Online Computer File)},
	month = {2011///},
	pages = {3365 - 3371},
	publisher = {American Chemical Society},
	abstract = {Metallogels form from Cu(II) ions and tetratopic ligand rctt-1,2-bis(3-pyridyl)-3,4-bis(4-pyridyl)cyclobutane.  The tetrapyridyl cyclobutane was synthesized in the org. solid state.  The gel forms with a variety of counteranions and gels water.  The hydrogel is thixotropic and is composed of nanoscale metal-org. particles (NMOPs), a high surface area of which likely accounts for the gelation of the polar aq. medium.  A shear stress profile of the thixotropic hydrogel gave a yield value of 8.33 Pa.  A novel combination of at. force microscopy (AFM) and scanning transmission x-ray microscopy (STXM) is used to assess the densities of individual NMOPs.  A d. of 1.37 g/cm3 was detd.  A single-crystal x-ray diffraction study demonstrates the ability of the unsym. cyclobutane 3,4{\textquoteright}-tpcb to self-assemble with Cu(II) ions in [Cu2(hfac)4(3,4{\textquoteright}-tpcb)]$\infty$ (hfac is hexafluoroacetylacetonate) to form a solvated 1-dimensional coordination polymer. [on SciFinder(R)]},
	keywords = {nanoparticle hydrogel thixotropy copper coordination polymer crystal},
	isbn = {0002-7863},
	author = {Hamilton, Tamara D. and Bucar, Dejan-Kresimir and Baltrusaitis, Jonas and Flanagan, Douglas R. and Li, Yingjian and Ghorai, Suman and Tivanski, Alexei V. and MacGillivray, Leonard R.}
}
