Chinese Journal of Organic Chemistry ›› 2020, Vol. 40 ›› Issue (5): 1361-1366.DOI: 10.6023/cjoc201912014 Previous Articles     Next Articles


胡智雄, 孙冬冬, 韩勰, 刘思敏   

  1. 武汉科技大学化学与化工学院 耐火材料与冶金国家重点实验室 武汉 430081
  • 收稿日期:2019-12-10 修回日期:2020-01-11 发布日期:2020-01-21
  • 通讯作者: 刘思敏
  • 基金资助:

Molecular Recognition of Cucurbit[10]uril toward Planar d8 and d10 Transition Metal Complexes

Hu Zhixiong, Sun Dongdong, Han Xie, Liu Simin   

  1. State Key Laboratory of Refractories and Metallurgy, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081
  • Received:2019-12-10 Revised:2020-01-11 Published:2020-01-21
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Nos. 21871216, 21901194, 21472143).

Due to the coordination-unsaturation feature of d8 and d10 transition metals, their unique electronic structures and easy formation of metal-metal bonds make them exhibit special photophysical and photochemical properties. The optical properties of luminescent molecules can be regulated through host-guest interactions. In order to further explore the effect of host-guest interaction on the optical properties of d8 and d10 transition metal complexes, the member with the largest cavity in the macrocyclic family of cucurbit[n]uril (CB[n], n=5~8, 10)-CB[10] was selected as host. The changes in photophysical properties of such water-soluble planar transition metal complexes after entering the host cavity were studied by means of UV/Vis, fluorescence, 1H NMR and mass spectra. The results show that the cavity of CB[10] can accommodate multiple Pt(II) complex molecules. By enhancing the π-π interaction between guest molecules in the cavity of CB[10], the distance between metal atoms was shortened, leading the formation of metal-metal interactions in the water phase. Encapsulation of Ir(III) complex in CB[10] causes the formation of excimer. In addition, strong metal-metal interactions between Rh(I) complex molecules were weakened after the guest went into CB[10], which should be attributed to the formation of 1:1 host-guest complex. The introduction of host-guest chemistry in regulating photophysical properties of d8 and d10 metal complexes would further expand the application of transition metal complexes in a wider range of fields.

Key words: transition metal complex, host-guest interaction, cucurbit[n]uril, inclusion complex, metal-metal interaction