title: STRUCTURE OF PORPHYRIN TPPS4AND ITS INTERACTION WITH METAL IONS AS ELUCIDATED BY1H NMR AND UV-VISIBLE SPECTRA.
abstract: Porphyrins are a group of tetrapyrrole pigments. Physical and chemical properties of porphyrins are often related to their compositions and structures. We conducted1H solution NMR and UV-visible spectral analysis to characterize the structural feature of a water-soluble, synthetic porphyrin i.e. tetrakis (p-sulfonatophenyl) porphyrin, TPPS4, and its interaction with different metal ions in aqueous solutions. The results indicate that tetrapyrrole and tetraphenyl rings in TPPS4molecule form a co-planar electron conjugation system; transition-metal ions show stronger binding capacity than alkali and alkali-earth metal ions; the relative stabilities of TPPS4-metal ion complexes can be well assessed by NMR and UV-visible spectral data.
authors.affiliation: Department of Natural Sciences, Savannah State University, Savannah, GA 31404, USA.
authors.forename: Zhiyan
authors.initials: Z
authors.lastname: Song
authors.forename: Adegboye O
authors.initials: AO
authors.lastname: Adeyemo
authors.forename: Jannie
authors.initials: J
authors.lastname: Baker
authors.forename: Shakeya M
authors.initials: SM
authors.lastname: Traylor
authors.forename: Marcia L
authors.initials: ML
authors.lastname: Lightfoot
keywords: NMR; Porphyrin; TPPS4
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