Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (06): 533-540.doi: 10.3866/PKU.WHXB19990610

• ARTICLE • Previous Articles     Next Articles

The Second Sphere Interaction in the Supramolecular Complexes Studiey by 59Co Solid Static NMR

Zhou Ping, OU  Yang-Zhi-Xun, Meng Qing-An   

  1. Department of Mcromolecular Science,Fudan University,Shanghai 200433|Department of Chemistry,The Chinese University of Hong Kong,Shatin,New Territories,Hong Kong|Institute of Physics,Chinese Academy of Sciences,Beijing 100080
  • Received:1998-08-31 Revised:1999-01-02 Published:1999-06-15
  • Contact: Zhou Ping

Abstract:

59Co solid static NMR has demontrated that the hydrogen bonding interaction plays an important role in the supramolecular complexes formed by the [Co (CN)6]3- and protonated polyammonium macrocycles. The 59Co chemical shift spans Ω in the supramolecular complexes containing hydrogen boning interaction are considerably larger than that in K3[Co(CN)6] which bears the electronic static interaction only. Hydrogen bonding interaction changes the symmetry, of [Co(CN)6]3- in the supramolecules leading to the split of the triplex degenerate state 1T1g and the extent of the split reveals the extent of the hydrogen bonding. Accordingly, the changes of the aquation quantum yields in the supramolecules are alternatively rationalized.

Key words: 59Co NMR, Supramolecular;Hydrogen bond, The second sphere interaction