Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (07): 1587-1594.doi: 10.3866/PKU.WHXB20110705

• THERMODYNAMICS, KINETICS, AND STRUCTURAL CHEMISTRY • Previous Articles     Next Articles

Crystal Structure and Surface Photoelectric Property of Mn(II) Coordination Complexes

JIN Jing, GONG Yuan-Yuan, WU Han-Qing, LI Lei, NIU Shu-Yun   

  1. School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, Liaoning Province, P. R. China
  • Received:2011-03-03 Revised:2011-05-04 Published:2011-06-28
  • Contact: NIU Sun-Yun E-mail:syniu@sohu.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20571037) and Innovative Team Foundation of Educational Office of Liaoning Province, China (2007T092).

Abstract:

Three Mn(II) complexes [Mn(SO4)(H2O)3]n (1), [Mn2.5(HPO4)(PO4)(H2O)2]n (2), [Mn(phen)2(H2O)2]?(C4H4O4)?4H2O (3) (phen=1,10-phenanthroline) were synthesized by a hydrothermal method and characterized by infrared spectrum (IR), ultraviolet-visible spectrum (UV-Vis), electron paramagnetic resonance spectrum (EPR), single crystal X-ray diffraction and surface photovoltage spectrum (SPS). The structural analyses indicate that complex 1 is a 2D coordination polymer and hydrogen bonds link the polymer to a 3D infinite structure. Complex 2 is a 3D coordination polymer. Complex 3 is a mononuclear complex and diverse hydrogen bonds connect the complex to the 3D supramolecule. SPS results indicate that the three complexes exhibit obvious surface photovoltage responses between 300-800 nm, which reveals that they possess a definite photoelectric conversion property. The structure of the complex, its dimensions and the coordination environment of the central metal affect obviously SPS: the intensity of the surface photovoltage (SPV) response bands become larger with increasing of dimensions and regularity of structure; differences in the species of direct coordination atoms and the strength of the crystal field around the central metal ions lead to the change of number and position of the response bands. Additionally, the association between SPS and UV-Vis were discussed.

Key words: Mn(II) complex, Synthesis, Crystal structure, Hydrogen bond, Photoelectric property

MSC2000: 

  • O641