Phenanthroline-polyoxometalate hybrid compounds and the observation of intramolecular charge transfer

Itsik Bar-Nahum; K. V. Narasimhulu; Lev Weiner; Ronny Neumann

doi:10.1021/ic050473c

Phenanthroline-polyoxometalate hybrid compounds and the observation of intramolecular charge transfer

Itsik Bar-Nahum, K. V. Narasimhulu, Lev Weiner, Ronny Neumann^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

67 Scopus citations

Abstract

A phenanthroline ligand has been covalently modified at the 2 and 9 positions by an aminophenylhexamolybdate substituent. The 1H NMR spectrum indicated a strong electron-withdrawing effect of the hexamolybdate (Mo ₆O₁₉^2-) moiety on the phenanthroline ligand. UV-vis and cyclic voltammetry showed extended conjugation of the hybrid phenanthroline-polyoxometalate compound and the possibility of easy oxidation of the extended phenanathroline ligand. Further EPR experiments provided strong evidence for an intramolecular charge-transfer process with the formation of a phenanthroline cation radical and a reduced hexamolybdate.

Original language	English
Pages (from-to)	4900-4902
Number of pages	3
Journal	Inorganic Chemistry
Volume	44
Issue number	14
DOIs	https://doi.org/10.1021/ic050473c
State	Published - 11 Jul 2005
Externally published	Yes

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title = "Phenanthroline-polyoxometalate hybrid compounds and the observation of intramolecular charge transfer",

abstract = "A phenanthroline ligand has been covalently modified at the 2 and 9 positions by an aminophenylhexamolybdate substituent. The 1H NMR spectrum indicated a strong electron-withdrawing effect of the hexamolybdate (Mo 6O192-) moiety on the phenanthroline ligand. UV-vis and cyclic voltammetry showed extended conjugation of the hybrid phenanthroline-polyoxometalate compound and the possibility of easy oxidation of the extended phenanathroline ligand. Further EPR experiments provided strong evidence for an intramolecular charge-transfer process with the formation of a phenanthroline cation radical and a reduced hexamolybdate.",

author = "Itsik Bar-Nahum and Narasimhulu, {K. V.} and Lev Weiner and Ronny Neumann",

year = "2005",

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doi = "10.1021/ic050473c",

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AU - Bar-Nahum, Itsik

AU - Narasimhulu, K. V.

AU - Weiner, Lev

AU - Neumann, Ronny

PY - 2005/7/11

Y1 - 2005/7/11

N2 - A phenanthroline ligand has been covalently modified at the 2 and 9 positions by an aminophenylhexamolybdate substituent. The 1H NMR spectrum indicated a strong electron-withdrawing effect of the hexamolybdate (Mo 6O192-) moiety on the phenanthroline ligand. UV-vis and cyclic voltammetry showed extended conjugation of the hybrid phenanthroline-polyoxometalate compound and the possibility of easy oxidation of the extended phenanathroline ligand. Further EPR experiments provided strong evidence for an intramolecular charge-transfer process with the formation of a phenanthroline cation radical and a reduced hexamolybdate.

AB - A phenanthroline ligand has been covalently modified at the 2 and 9 positions by an aminophenylhexamolybdate substituent. The 1H NMR spectrum indicated a strong electron-withdrawing effect of the hexamolybdate (Mo 6O192-) moiety on the phenanthroline ligand. UV-vis and cyclic voltammetry showed extended conjugation of the hybrid phenanthroline-polyoxometalate compound and the possibility of easy oxidation of the extended phenanathroline ligand. Further EPR experiments provided strong evidence for an intramolecular charge-transfer process with the formation of a phenanthroline cation radical and a reduced hexamolybdate.

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JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 14

ER -

Phenanthroline-polyoxometalate hybrid compounds and the observation of intramolecular charge transfer

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