Features of proteolytic properties of tetraphenylporphyrin complex with lanthanide group metals

Elena A. Tobolkina, Tatiana A. Skripnikova, Anna A. Starikova, Galina I. Shumilova, Andrey A. Pendin

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Demetallation of metalloporphyrin molecules is one of the essential degradation reactions in photosynthesis. The effect of metalloporphyrin nature on removal of central metals from tetraphenylporphyrin complexes based on lanthanide group metals (Dy, Er, Lu, Ho) has been studied. pH values, at which the metal ions leave the metalloporphyrin complex were established using two-phase spectrophotometric titration with potentiometric pH-control. The pH values decrease with the increase of atomic numbers of lanthanide groups, as well as with increase of 4f–electrons. The reaction of an extra ligand exchange for the hydroxide ion was studied. For Dy-, Er- and Ho-tetraphenylporphyrin complexes one particle of extra ligand coordinates with one porphyrin complex. A complex with dimeric particles can be formed for the system of Lu-tetraphenylporphyrin. Constants of the ion exchange reactions were calculated. Synopsis The effect of metalloporphyrin nature on removal of central metals from tetraphenylporphyrin complexes based on lanthanide group metals (Dy, Er, Lu, Ho) has been studied. The heterophase reaction of ion-selective electrodes were calculated, as well as the reaction of an extra ligand exchange for the hydroxide ion.

Original languageEnglish
Pages (from-to)227-230
Number of pages4
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume189
DOIs
StatePublished - 15 Jan 2018

Keywords

  • Dy-
  • Er-
  • Ho-tetraphenylporphyrins
  • Ion-selective electrode
  • Lu-
  • UV–Vis spectroscopy

Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

Cite this

Tobolkina, Elena A. ; Skripnikova, Tatiana A. ; Starikova, Anna A. ; Shumilova, Galina I. ; Pendin, Andrey A. / Features of proteolytic properties of tetraphenylporphyrin complex with lanthanide group metals. In: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy. 2018 ; Vol. 189. pp. 227-230.
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abstract = "Demetallation of metalloporphyrin molecules is one of the essential degradation reactions in photosynthesis. The effect of metalloporphyrin nature on removal of central metals from tetraphenylporphyrin complexes based on lanthanide group metals (Dy, Er, Lu, Ho) has been studied. pH values, at which the metal ions leave the metalloporphyrin complex were established using two-phase spectrophotometric titration with potentiometric pH-control. The pH values decrease with the increase of atomic numbers of lanthanide groups, as well as with increase of 4f–electrons. The reaction of an extra ligand exchange for the hydroxide ion was studied. For Dy-, Er- and Ho-tetraphenylporphyrin complexes one particle of extra ligand coordinates with one porphyrin complex. A complex with dimeric particles can be formed for the system of Lu-tetraphenylporphyrin. Constants of the ion exchange reactions were calculated. Synopsis The effect of metalloporphyrin nature on removal of central metals from tetraphenylporphyrin complexes based on lanthanide group metals (Dy, Er, Lu, Ho) has been studied. The heterophase reaction of ion-selective electrodes were calculated, as well as the reaction of an extra ligand exchange for the hydroxide ion.",
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Features of proteolytic properties of tetraphenylporphyrin complex with lanthanide group metals. / Tobolkina, Elena A.; Skripnikova, Tatiana A.; Starikova, Anna A.; Shumilova, Galina I.; Pendin, Andrey A.

In: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, Vol. 189, 15.01.2018, p. 227-230.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Features of proteolytic properties of tetraphenylporphyrin complex with lanthanide group metals

AU - Tobolkina, Elena A.

AU - Skripnikova, Tatiana A.

AU - Starikova, Anna A.

AU - Shumilova, Galina I.

AU - Pendin, Andrey A.

PY - 2018/1/15

Y1 - 2018/1/15

N2 - Demetallation of metalloporphyrin molecules is one of the essential degradation reactions in photosynthesis. The effect of metalloporphyrin nature on removal of central metals from tetraphenylporphyrin complexes based on lanthanide group metals (Dy, Er, Lu, Ho) has been studied. pH values, at which the metal ions leave the metalloporphyrin complex were established using two-phase spectrophotometric titration with potentiometric pH-control. The pH values decrease with the increase of atomic numbers of lanthanide groups, as well as with increase of 4f–electrons. The reaction of an extra ligand exchange for the hydroxide ion was studied. For Dy-, Er- and Ho-tetraphenylporphyrin complexes one particle of extra ligand coordinates with one porphyrin complex. A complex with dimeric particles can be formed for the system of Lu-tetraphenylporphyrin. Constants of the ion exchange reactions were calculated. Synopsis The effect of metalloporphyrin nature on removal of central metals from tetraphenylporphyrin complexes based on lanthanide group metals (Dy, Er, Lu, Ho) has been studied. The heterophase reaction of ion-selective electrodes were calculated, as well as the reaction of an extra ligand exchange for the hydroxide ion.

AB - Demetallation of metalloporphyrin molecules is one of the essential degradation reactions in photosynthesis. The effect of metalloporphyrin nature on removal of central metals from tetraphenylporphyrin complexes based on lanthanide group metals (Dy, Er, Lu, Ho) has been studied. pH values, at which the metal ions leave the metalloporphyrin complex were established using two-phase spectrophotometric titration with potentiometric pH-control. The pH values decrease with the increase of atomic numbers of lanthanide groups, as well as with increase of 4f–electrons. The reaction of an extra ligand exchange for the hydroxide ion was studied. For Dy-, Er- and Ho-tetraphenylporphyrin complexes one particle of extra ligand coordinates with one porphyrin complex. A complex with dimeric particles can be formed for the system of Lu-tetraphenylporphyrin. Constants of the ion exchange reactions were calculated. Synopsis The effect of metalloporphyrin nature on removal of central metals from tetraphenylporphyrin complexes based on lanthanide group metals (Dy, Er, Lu, Ho) has been studied. The heterophase reaction of ion-selective electrodes were calculated, as well as the reaction of an extra ligand exchange for the hydroxide ion.

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JF - SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

SN - 1386-1425

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