Greenish-yellow-, yellow- and orange-light-emitting iridium(III) polypyridyl complexes with poly(eta-caprolactone)-bipyridine macroligands

E. Holder, V.N. Marin, A.A. Alexeev, U.S. Schubert

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Abstract

A set of novel greenish-yellow-, yellow-, and orange-light-emitting polymeric iridium(III) complexes were synthesized with the bridge-splitting method. The respective dimeric precursor complexes, [Ir(ppy)2--Cl]2 (ppy = 2-phenylpyridine) and [Ir(ppyCHO)2--Cl]2 [ppyCHO = 4-(2-pyridyl)benzaldehyde], were coordinated to 2,2-bipyridine carrying poly(-caprolactone) tails. The resulting emissive polymers were characterized with one-dimensional (1H) and two-dimensional (1H1H correlation spectroscopy) nuclear magnetic resonance and infrared spectroscopy, gel permeation chromatography, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, and the successful coordination of the iridium(III) centers to the 2,2-bipyridine macroligand was revealed. The thermal behavior was studied with differential scanning calorimetry and correlated with atomic force microscopy. Furthermore, the quantitative coordination was verified by both the photophysical and electrochemical properties of the mononuclear iridium(III) compounds. The photoluminescence spectra showed strong emissions at 535 and 570 nm. The color shifts depended on the substituents of the cyclometallating ligands. Cyclic voltammetry gave oxidation potentials of 1.23 V and 1.46 V. Upon the excitation of the films at 365 nm, yellow light was observed, and this could allow potential applications in light-emitting devices. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 2765-2776, 2005
Original languageEnglish
Pages (from-to)2765-2776
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume43
Issue number13
DOIs
Publication statusPublished - 2005

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Iridium
Iridium compounds
Gel permeation chromatography
Electrochemical properties
Nuclear magnetic resonance spectroscopy
Cyclic voltammetry
Ionization
Mass spectrometry
Differential scanning calorimetry
Infrared spectroscopy
Atomic force microscopy
Desorption
Photoluminescence
Polymers
Ligands
Spectroscopy
Color
Oxidation
caprolactone
Lasers

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@article{871d8f81f2864477bae226e8b9045ad2,
title = "Greenish-yellow-, yellow- and orange-light-emitting iridium(III) polypyridyl complexes with poly(eta-caprolactone)-bipyridine macroligands",
abstract = "A set of novel greenish-yellow-, yellow-, and orange-light-emitting polymeric iridium(III) complexes were synthesized with the bridge-splitting method. The respective dimeric precursor complexes, [Ir(ppy)2--Cl]2 (ppy = 2-phenylpyridine) and [Ir(ppyCHO)2--Cl]2 [ppyCHO = 4-(2-pyridyl)benzaldehyde], were coordinated to 2,2-bipyridine carrying poly(-caprolactone) tails. The resulting emissive polymers were characterized with one-dimensional (1H) and two-dimensional (1H1H correlation spectroscopy) nuclear magnetic resonance and infrared spectroscopy, gel permeation chromatography, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, and the successful coordination of the iridium(III) centers to the 2,2-bipyridine macroligand was revealed. The thermal behavior was studied with differential scanning calorimetry and correlated with atomic force microscopy. Furthermore, the quantitative coordination was verified by both the photophysical and electrochemical properties of the mononuclear iridium(III) compounds. The photoluminescence spectra showed strong emissions at 535 and 570 nm. The color shifts depended on the substituents of the cyclometallating ligands. Cyclic voltammetry gave oxidation potentials of 1.23 V and 1.46 V. Upon the excitation of the films at 365 nm, yellow light was observed, and this could allow potential applications in light-emitting devices. {\circledC} 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 2765-2776, 2005",
author = "E. Holder and V.N. Marin and A.A. Alexeev and U.S. Schubert",
year = "2005",
doi = "10.1002/pola.20690",
language = "English",
volume = "43",
pages = "2765--2776",
journal = "Journal of Polymer Science, Part A: Polymer Chemistry",
issn = "0887-624X",
publisher = "Wiley",
number = "13",

}

Greenish-yellow-, yellow- and orange-light-emitting iridium(III) polypyridyl complexes with poly(eta-caprolactone)-bipyridine macroligands. / Holder, E.; Marin, V.N.; Alexeev, A.A.; Schubert, U.S.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 43, No. 13, 2005, p. 2765-2776.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Greenish-yellow-, yellow- and orange-light-emitting iridium(III) polypyridyl complexes with poly(eta-caprolactone)-bipyridine macroligands

AU - Holder, E.

AU - Marin, V.N.

AU - Alexeev, A.A.

AU - Schubert, U.S.

PY - 2005

Y1 - 2005

N2 - A set of novel greenish-yellow-, yellow-, and orange-light-emitting polymeric iridium(III) complexes were synthesized with the bridge-splitting method. The respective dimeric precursor complexes, [Ir(ppy)2--Cl]2 (ppy = 2-phenylpyridine) and [Ir(ppyCHO)2--Cl]2 [ppyCHO = 4-(2-pyridyl)benzaldehyde], were coordinated to 2,2-bipyridine carrying poly(-caprolactone) tails. The resulting emissive polymers were characterized with one-dimensional (1H) and two-dimensional (1H1H correlation spectroscopy) nuclear magnetic resonance and infrared spectroscopy, gel permeation chromatography, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, and the successful coordination of the iridium(III) centers to the 2,2-bipyridine macroligand was revealed. The thermal behavior was studied with differential scanning calorimetry and correlated with atomic force microscopy. Furthermore, the quantitative coordination was verified by both the photophysical and electrochemical properties of the mononuclear iridium(III) compounds. The photoluminescence spectra showed strong emissions at 535 and 570 nm. The color shifts depended on the substituents of the cyclometallating ligands. Cyclic voltammetry gave oxidation potentials of 1.23 V and 1.46 V. Upon the excitation of the films at 365 nm, yellow light was observed, and this could allow potential applications in light-emitting devices. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 2765-2776, 2005

AB - A set of novel greenish-yellow-, yellow-, and orange-light-emitting polymeric iridium(III) complexes were synthesized with the bridge-splitting method. The respective dimeric precursor complexes, [Ir(ppy)2--Cl]2 (ppy = 2-phenylpyridine) and [Ir(ppyCHO)2--Cl]2 [ppyCHO = 4-(2-pyridyl)benzaldehyde], were coordinated to 2,2-bipyridine carrying poly(-caprolactone) tails. The resulting emissive polymers were characterized with one-dimensional (1H) and two-dimensional (1H1H correlation spectroscopy) nuclear magnetic resonance and infrared spectroscopy, gel permeation chromatography, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, and the successful coordination of the iridium(III) centers to the 2,2-bipyridine macroligand was revealed. The thermal behavior was studied with differential scanning calorimetry and correlated with atomic force microscopy. Furthermore, the quantitative coordination was verified by both the photophysical and electrochemical properties of the mononuclear iridium(III) compounds. The photoluminescence spectra showed strong emissions at 535 and 570 nm. The color shifts depended on the substituents of the cyclometallating ligands. Cyclic voltammetry gave oxidation potentials of 1.23 V and 1.46 V. Upon the excitation of the films at 365 nm, yellow light was observed, and this could allow potential applications in light-emitting devices. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 2765-2776, 2005

U2 - 10.1002/pola.20690

DO - 10.1002/pola.20690

M3 - Article

VL - 43

SP - 2765

EP - 2776

JO - Journal of Polymer Science, Part A: Polymer Chemistry

JF - Journal of Polymer Science, Part A: Polymer Chemistry

SN - 0887-624X

IS - 13

ER -