Synthesis and Characterization of a Heteroleptic Ru(II) Complex of Phenanthroline Containing Oligo-Anthracenyl Carboxylic Acid Moieties
In an effort to develop new ruthenium(II) complexes, this work describes the design, synthesis and characterization of a ruthenium(II) functionalized phenanthroline complex with extended π-conjugation. The ligand were L1 (4,7-bis(2,3-dimethylacrylic acid)-1,10-phenanthroline), synthesized by a direc...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2010-09-01
|
Series: | International Journal of Molecular Sciences |
Subjects: | |
Online Access: | http://www.mdpi.com/1422-0067/11/9/3158/ |
id |
doaj-c41785461b0040cebd548977ff53ad4f |
---|---|
record_format |
Article |
spelling |
doaj-c41785461b0040cebd548977ff53ad4f2020-11-24T23:17:12ZengMDPI AGInternational Journal of Molecular Sciences1422-00672010-09-011193158317610.3390/ijms11093158Synthesis and Characterization of a Heteroleptic Ru(II) Complex of Phenanthroline Containing Oligo-Anthracenyl Carboxylic Acid MoietiesPeter A. AjibadeAdewale O. AdeloyeIn an effort to develop new ruthenium(II) complexes, this work describes the design, synthesis and characterization of a ruthenium(II) functionalized phenanthroline complex with extended π-conjugation. The ligand were L1 (4,7-bis(2,3-dimethylacrylic acid)-1,10-phenanthroline), synthesized by a direct aromatic substitution reaction, and L2 (4,7-bis(trianthracenyl-2,3-dimethylacrylic acid)-1,10-phenanthroline), which was synthesized by the dehalogenation of halogenated aromatic compounds using a zero-valent palladium cross-catalyzed reaction in the absence of magnesium-diene complexes and/or cyclooctadienyl nickel (0) catalysts to generate a new carbon-carbon bond (C-C bond) polymerized hydrocarbon units. The ruthenium complex [RuL1L2(NCS)2] showed improved photophysical properties (red-shifted metal-to-ligand charge-transfer transition absorptions and enhanced molar extinction coefficients), luminescence and interesting electrochemical properties. Cyclic and square wave voltammetry revealed five major redox processes. The number of electron(s) transferred by the ruthenium complex was determined by chronocoulometry in each case. The results show that processes I, II and III are multi-electron transfer reactions while processes IV and V involved one-electron transfer reaction. The photophysical property of the complex makes it a promising candidate in the design of chemosensors and photosensitizers, while its redox-active nature makes the complex a potential mediator of electron transfer in photochemical processes. http://www.mdpi.com/1422-0067/11/9/3158/polypyridyl ligandsruthenium complexoligoathracenepalladiumconjugationspectroscopyelectrochemistry |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Peter A. Ajibade Adewale O. Adeloye |
spellingShingle |
Peter A. Ajibade Adewale O. Adeloye Synthesis and Characterization of a Heteroleptic Ru(II) Complex of Phenanthroline Containing Oligo-Anthracenyl Carboxylic Acid Moieties International Journal of Molecular Sciences polypyridyl ligands ruthenium complex oligoathracene palladium conjugation spectroscopy electrochemistry |
author_facet |
Peter A. Ajibade Adewale O. Adeloye |
author_sort |
Peter A. Ajibade |
title |
Synthesis and Characterization of a Heteroleptic Ru(II) Complex of Phenanthroline Containing Oligo-Anthracenyl Carboxylic Acid Moieties |
title_short |
Synthesis and Characterization of a Heteroleptic Ru(II) Complex of Phenanthroline Containing Oligo-Anthracenyl Carboxylic Acid Moieties |
title_full |
Synthesis and Characterization of a Heteroleptic Ru(II) Complex of Phenanthroline Containing Oligo-Anthracenyl Carboxylic Acid Moieties |
title_fullStr |
Synthesis and Characterization of a Heteroleptic Ru(II) Complex of Phenanthroline Containing Oligo-Anthracenyl Carboxylic Acid Moieties |
title_full_unstemmed |
Synthesis and Characterization of a Heteroleptic Ru(II) Complex of Phenanthroline Containing Oligo-Anthracenyl Carboxylic Acid Moieties |
title_sort |
synthesis and characterization of a heteroleptic ru(ii) complex of phenanthroline containing oligo-anthracenyl carboxylic acid moieties |
publisher |
MDPI AG |
series |
International Journal of Molecular Sciences |
issn |
1422-0067 |
publishDate |
2010-09-01 |
description |
In an effort to develop new ruthenium(II) complexes, this work describes the design, synthesis and characterization of a ruthenium(II) functionalized phenanthroline complex with extended π-conjugation. The ligand were L1 (4,7-bis(2,3-dimethylacrylic acid)-1,10-phenanthroline), synthesized by a direct aromatic substitution reaction, and L2 (4,7-bis(trianthracenyl-2,3-dimethylacrylic acid)-1,10-phenanthroline), which was synthesized by the dehalogenation of halogenated aromatic compounds using a zero-valent palladium cross-catalyzed reaction in the absence of magnesium-diene complexes and/or cyclooctadienyl nickel (0) catalysts to generate a new carbon-carbon bond (C-C bond) polymerized hydrocarbon units. The ruthenium complex [RuL1L2(NCS)2] showed improved photophysical properties (red-shifted metal-to-ligand charge-transfer transition absorptions and enhanced molar extinction coefficients), luminescence and interesting electrochemical properties. Cyclic and square wave voltammetry revealed five major redox processes. The number of electron(s) transferred by the ruthenium complex was determined by chronocoulometry in each case. The results show that processes I, II and III are multi-electron transfer reactions while processes IV and V involved one-electron transfer reaction. The photophysical property of the complex makes it a promising candidate in the design of chemosensors and photosensitizers, while its redox-active nature makes the complex a potential mediator of electron transfer in photochemical processes. |
topic |
polypyridyl ligands ruthenium complex oligoathracene palladium conjugation spectroscopy electrochemistry |
url |
http://www.mdpi.com/1422-0067/11/9/3158/ |
work_keys_str_mv |
AT peteraajibade synthesisandcharacterizationofaheterolepticruiicomplexofphenanthrolinecontainingoligoanthracenylcarboxylicacidmoieties AT adewaleoadeloye synthesisandcharacterizationofaheterolepticruiicomplexofphenanthrolinecontainingoligoanthracenylcarboxylicacidmoieties |
_version_ |
1725584353880178688 |