Bulletin of the Korean Chemical Society

  • 제30권3호
  • /
  • Pages.573-576
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  • 2009
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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First Hydrogelation of Discrete Metal Complexes. Structures and Fluxional Behavior of Cyclopalladium(II) Complexes

  • Na, Young-Mee (Department of Chemistry, Pusan National University) ;
  • Noh, Tae-Hwan (Department of Chemistry, Pusan National University) ;
  • Ha, Byung-Jo (Department of Dermatic Health Management, Eulji University) ;
  • Hong, Jong-Ki (College of Pharmacy, Kyung Hee University) ;
  • Jung, Ok-Sang (Department of Chemistry, Pusan National University)
  • 발행 : 2009.03.20
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초록

The reaction of $(en)Pd(NO_3)_2$ (en = ethylenediamine) with 1,4-bis(dimethyl-4-pyridylsilyl)benzene (L) affords cyclodimer, $[(en)Pd(L)]_2(NO_3)_4$, whereas the reaction of $(tmeda)Pd(NO_3)_2$ (tmeda = N,N,N’,N’-tetramethylethylenediamine) with L gives cyclotrimer, $[(tmeda)Pd(L)]_3(NO_3)_6$. Both complexes exist as catenane in water. The catenated cyclodimer is rigid whereas the catenated cyclotrimer is dynamic in water. The catenated cyclotrimers afford hydrogel containing 98.5% water below 2 ${^{\circ}C}$. The hydrogel changes to its sol around 38 ${^{\circ}C}$, and to its clear solution at 78 ${^{\circ}C}$. Such a notable difference between $[(en)Pd(L)]_2(NO_3)_4$ and $[(tmeda)Pd(L)]_3(NO_3)_6$ might be explained by their different dynamic behavior via ring size effects.

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  2. ) based binuclear complexes as tectons in crystal engineering and the imperative role of the cis-protecting agent vol.19, pp.35, 2017, https://doi.org/10.1039/C7CE00654C
  3. ) complex with a propeller-type ligand: metal hopping on both sides pp.1477-9234, 2018, https://doi.org/10.1039/C8DT03884H
  4. Solution-Behavior of Ionic Palladium(II) Complexes Sensitive to Metallophilicity of Counteranions vol.31, pp.12, 2009, https://doi.org/10.5012/bkcs.2010.31.12.3844
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