Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Spectroscopic Properties of cis-(1,4,8,11-Tetraazacyclotetradecane)(1,2-propanediamine)chromium(Ⅲ) Perchlorate$^1$

  • Jong-Ha Choi (Department of Chemistry, Andong National University)
  • Published : 1993.02.20
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Abstract

The 77 K luminescence and excitation spectra, room-temperature FT-infrared and visible absorption spectra of a newly prepared complex cis-[Cr(cyclam)(pn)]$(ClO_4)_3$, where cyclam and pn represent 1,4,8,11-tetraazacyclotetradecane and 1,2-propanediamine respectively, have been measured. Absorption maximum of the first spin-allowed transition in the electronic absorption spectra of cis-[Cr(cyclam)(pn)]$^{3+}$ and cis-[Cr(cyclam)(en)]$^{3+}$ appears at nearly the same position. The two spin-allowed and six spin-forbidden electronic transitions are assigned from the visible absorption and excitation spectra. It is also shown that the zero phonon line in the excitation spectrum splits into two components by 50 cm$^{-1}$.

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