Synthesis and spectroscopic studies of 4-phenylacetyl-3-methyl-1-phenylpyrazolone-5 and its thorium(VI), lanthanum(III) and lead(II) complexes
β Scribed by Bieluonwu Augustus Uzoukwu; Patricia Ugboaku Adiukwu
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 146 KB
- Volume
- 51
- Category
- Article
- ISSN
- 1386-1425
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## Abstract A new, strongly absorbing red dipyrrole chromophore 1 suitable for exciton coupling studies has been synthesized and shown to exhibit an intense absorption (Ο΅Λ 57,000) at Ξ» (max) Λ520 nm and a strong fluorescence at Ξ» (em) Λ555 nm.
The monovalent metal complex of Na and the divalent metal complexes of Be, Mn, Co, Ni, Cu. Zn, Mg, Ba, Hg and Pb with l-phenyl-3-methyl-4-benzoyl-pyrazolone-5 (HPMBP), have been synthesized. It is shown that HPMBP behaves like a bidentate enol forming neutral metal chelates through the carbonyl and