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Lah, Myoung Soo
Nanoporous Materials Lab
Research Interests
  • Metal-Organic Frameworks (MOFs)
  • Crystal Engineering
  • Supramolecular coordination chemistry


Dynamic equilibrium between a supramolecular capsule and bowl generated by inter- and intramolecular metal clipping

DC Field Value Language Park, SJ ko Shin, DM ko Sakamoto, S ko Yamaguchi, K ko Chung, YK ko Lah, Myoung Soo ko Hong, JI ko 2014-09-16T06:57:34Z - 2014-09-12 ko 2005 ko
dc.identifier.citation CHEMISTRY-A EUROPEAN JOURNAL, v.11, no.1, pp.235 - 241 ko
dc.identifier.issn 0947-6539 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract The metal-induced self-assembly of a resorcin[4]arene derivative 1 that has four pyridine units as pendent groups and two equivalents of [M(dppp)(OTf) 2] (M=Pd, Pt) results in a dynamic equilibrium between an interclipped supramolecular capsule 3 and an intraclipped bowl 4 in nitromethane, although the interclipped capsule 3 is formed as a sole adduct in chloroform/methanol and the intraclipped bowl 4 is formed exclusively in an aqueous phase. This demonstrates how metal-induced self-assembly can be tuned by subtle changes in the solvent system. The coexistence of the two structures in nitromethane was characterized by NMR spectroscopy and coldspray ionization mass spectrometry (CSI-MS). The crystal structure of the interclipped capsule 3b, which is composed of two units of ligand 1 and four PtII ions, reveals the capsule cavity to have nanoscale dimensions of 15 × 20 A. NMR spectra show that the dynamic equilibrium between 3 and 4 is dependent on concentration and temperature. Temperature-dependent 1H NMR spectroscopy was carried out from 273 to 343 K to verify the thermodynamic parameters that control the dynamic equilibrium process; the conversion from the interclipped supramolecular capsule 3 a to the intraclipped bowl 4 a is entropically favored and enthalpically disfavored. The rotational barrier of the restricted rotation of pyridine units in the intraclipped bowl 4 was determined by line-shape analysis. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher WILEY-V C H VERLAG GMBH ko
dc.subject Dynamic equilibrium ko
dc.subject Interclipped capsule ko
dc.subject Intraclipped bowl ko
dc.subject Self-assembly ko
dc.subject Solvent effects ko
dc.title Dynamic equilibrium between a supramolecular capsule and bowl generated by inter- and intramolecular metal clipping ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-19944429121 ko
dc.identifier.wosid 000226278700021 ko
dc.type.rims ART ko
dc.description.wostc 49 *
dc.description.scopustc 16 * 2015-05-06 * 2014-09-12 *
dc.identifier.doi 10.1002/chem.200400801 ko
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