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

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

Research output: Contribution to journalArticle

61 Citations (Scopus)

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 languageEnglish
Pages (from-to)4900-4902
Number of pages3
JournalInorganic Chemistry
Volume44
Issue number14
DOIs
Publication statusPublished - Jul 11 2005

Fingerprint

Phenanthrolines
Charge transfer
charge transfer
ligands
Ligands
conjugation
Cyclic voltammetry
Paramagnetic resonance
Cations
cations
nuclear magnetic resonance
oxidation
Nuclear magnetic resonance
Oxidation
polyoxometalate I
Electrons
electrons
Experiments

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Phenanthroline-polyoxometalate hybrid compounds and the observation of intramolecular charge transfer. / Bar-Nahum, Itsik; Narasimhulu, K. V.; Weiner, Lev; Neumann, Ronny.

In: Inorganic Chemistry, Vol. 44, No. 14, 11.07.2005, p. 4900-4902.

Research output: Contribution to journalArticle

Bar-Nahum, Itsik ; Narasimhulu, K. V. ; Weiner, Lev ; Neumann, Ronny. / Phenanthroline-polyoxometalate hybrid compounds and the observation of intramolecular charge transfer. In: Inorganic Chemistry. 2005 ; Vol. 44, No. 14. pp. 4900-4902.
@article{528f9c4e9de44da4b3ec47f92447d2bf,
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 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.",
author = "Itsik Bar-Nahum and Narasimhulu, {K. V.} and Lev Weiner and Ronny Neumann",
year = "2005",
month = "7",
day = "11",
doi = "10.1021/ic050473c",
language = "English",
volume = "44",
pages = "4900--4902",
journal = "Inorganic Chemistry",
issn = "0020-1669",
publisher = "American Chemical Society",
number = "14",

}

TY - JOUR

T1 - Phenanthroline-polyoxometalate hybrid compounds and the observation of intramolecular charge transfer

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 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.

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 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.

UR - http://www.scopus.com/inward/record.url?scp=22544480311&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=22544480311&partnerID=8YFLogxK

U2 - 10.1021/ic050473c

DO - 10.1021/ic050473c

M3 - Article

C2 - 15998013

AN - SCOPUS:22544480311

VL - 44

SP - 4900

EP - 4902

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 14

ER -