Determination of Double Decker Sandwich Structure of Praseodymium-chlorophyll a Molecule Article

Wei, ZG, Hong, FS, Zhao, GW et al. (2000). Determination of Double Decker Sandwich Structure of Praseodymium-chlorophyll a Molecule . 21(3), 334.



cited authors

  • Wei, ZG; Hong, FS; Zhao, GW; Tao, Y; Hu, TD; Wang, W; Liu, T; Xie, YN; Wu, ZH

fiu authors

abstract

  • The Pr(III) complex of Chlorophyll a was synthesized and characterized. The results of UV-Vis and IR spectra indicate the coordination of Pr(III) to the porphyrin rings. The special bands in Soret band region in MCD spectra shown a transition type of the sandwich structure porphyrin complexes. By extended X-ray Absorption Fine Structure(XAFS) method, a double decker sandwich structure was well fitted, in which Pr is surrounded by eight nitrogen atoms from two porphyrin rings. Combining the MCD with EXAFS results, it is believed that the binding mode of Pr ion in chlorophyll a is a sandwich structure with the Pr - N bond length of average 0.242 nm.

publication date

  • March 10, 2000

start page

  • 334

volume

  • 21

issue

  • 3