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Complex of meso-tetra-(1-naphthyl)tetrabenzo-porphyrin withholmium acetylacetonate,Ho(TNTBP)acac(TNTBP:meso-tetra-(1-naphthyl)tetrabenzoporphyrin.Hacac:acetylacetone)have been prepared and char-acterized by elemental analyses,ultra-violet visible spectra