Inert and stable erbium(III)-cored complexes based on metalloporphyrins bearing aryl-ether dendron for optical amplification: synthesis and emission enhancement

Oh, Jae Buem; Kim, Yong Hee; Nah, Min Kook; Kim, Hwan Kyu

doi:10.1016/j.jlumin.2004.10.006

Cited by 48 publications

(7 citation statements)

References 40 publications

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“…3, both Zn(II)-porphyrin dyes showed a very intense band at 430 nm for B band, whereas the weak bands at 560 and 600 nm were assigned to the Q bands due to no d-p orbital interaction between fully occupied d orbital in Zn(II) ions and p orbital in porphyrin [17,18].…”

Section: Resultsmentioning

confidence: 94%

Novel extended π-conjugated Zn(II)-porphyrin derivatives bearing pendant triphenylamine moiety for dye-sensitized solar cell: synthesis and characterization

Kang

Seo

et al. 2009

J. Porphyrins Phthalocyanines

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We have designed and synthesized novel Zn(II)-porphyrin derivatives for dye-sensitized solar cells. The derivatives incorporate the electron-donating group of a pendant triphenylamine into cyano-substituted ([TPA]Zn-Por-CN1) or non-substituted stilbene moiety ([TPA]Zn-Por1) in the 5,10,15-meso-position and carboxylic acid group in the 20-meso-position in a porphyrin derivative. Their chemical structures were characterized by 1 H NMR, FT-IR, UV-vis absorption, EI-mass, and MALDI-TOF mass spectroscopies. Their electrochemical properties were studied by cyclic voltammetry measurement. These Zn(II)-porphyrin derivatives have been used to fabricate dye-sensitized solar cells based on I -/I 2 liquid electrolytes as dye sensitizers and their device performances were evaluated by comparing with that of a standard Ru(II) complex dye.[TPA]Zn-Por-CN1 showed higher power conversion effi ciency than that of [TPA]Zn-Por1, due to a broader absorption band around 435 nm. Short-circuit photocurrent density (J sc ), open-circuit voltage (V oc ), fi ll factor (FF), and power conversion effi ciency (η) of DSSC for [TPA]Zn-Por-CN1 were evaluated to be J sc = 6.3 mA.cm -2 , V oc = 0.737 V, FF = 0.683, and η = 3.1%, respectively.

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Section: Resultsmentioning

confidence: 94%

Novel extended π-conjugated Zn(II)-porphyrin derivatives bearing pendant triphenylamine moiety for dye-sensitized solar cell: synthesis and characterization

Kang

Seo

et al. 2009

J. Porphyrins Phthalocyanines

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“…On such a basis, several erbium-containing compounds have been synthesized and characterized over the past decade, – with the aim of enhancing the near-infrared (NIR) emission and improving the physical processability and compatibility of the materials. Specifically, great attention has been paid to the investigation and engineering of the intramolecular energy transfer through the choice of specific organic ligands, as well as to reducing the quenching of the radiative emission.…”

Section: Introductionmentioning

confidence: 99%

“…They concluded that energy-transfer rates should be improved by direct coordination of the antenna ligand to the lanthanide ion. On the other hand, Hwan Kyu Kim et al , investigated intramolecular processes in erbium-cored supramolecular complexes based on platinumporphyrin ligands with no direct coordination to the erbium ion. The authors’ calculations suggest that the excitation is conveyed to the erbium ion through Förster resonant transfer from the ligand first triplet excited state to the lanthanide 4 F 9/2 and 4 I 9/2 states.…”

Section: Introductionmentioning

confidence: 99%

Effects of Progressive Halogen Substitution on the Photoluminescence Properties of an Erbium−Porphyrin Complex

et al. 2010

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We have investigated the photoluminescence properties of porphyrin-based erbium and gadolinium complexes at different levels of halogen substitution. Both the intensity and the decay time of the erbium near-infrared emission correlate with the degree of the halogenation. Conversely, no clear correlation is found with the triplet-state energy levels nor with the intensity of the residual visible emission. Such findings confirm that the key role in the low efficiency of the near-infrared emission is played by the nonradiative quenching of the erbium emitting level due to the vibrational modes of the surrounding C-H bonds.

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“…Thus, Fréchet9, 10 and Kawa11 reported the site‐isolation and antenna effects of Eu 3+ , Tb 3+ , and Er 3+ ‐cored dendrimer complexes obtained by self‐assembly of suitably functionalized carboxylate aryl ether‐type dendrons around the lanthanide ion. Kim and co‐workers used dendritic luminescent ligands based on metalloporphyrin,12–14 naphthalene,15, 16 and 9,10‐diphenylanthracene17 units that also bear aryl ether‐type dendrons.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the complete elucidation of the structure of these Ln(III)‐cored dendrimers is still a challenge, and further work is necessary in order to overcome this issue. Typically, they are depicted in the literature as three dendrons that are probably assembled as carboxylate ligands surrounding the lanthanide core 9–11, 13–18. Some studies with different poly(benzyl ether) dendrons indicate that the co‐ordination structure depends on the type and generation of the dendron as well as the lanthanide ion 19…”

Section: Introductionmentioning

confidence: 99%

A MALDI‐TOF MS study of lanthanide(III)‐cored poly(phenylenevinylene) dendrimers

et al. 2008

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An extensive study by matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry (MS) of some first-generation and second-generation lanthanide(III)-cored poly(phenylenevinylene) dendrimers is described. The complexes were obtained by self-assembly of suitably functionalized carboxylate dendrons around the lanthanide ion (La(3+), Er(3+)). Fourier transform infrared (FT-IR) spectroscopy gave reasonable evidence for the proposed structures. However, MS was used to ascertain unequivocally the complex formation. The most reliable results were found in the negative reflector mode, using 2-[(2E)-3-(4-tert-butylphenyl)-2-methylprop-2-enylidene]malononitrile (DCTB) as matrix. Well-defined and highly resolved base peaks corresponding to negative ions of [Gn(4)La](-) and [Gn(4)Er](-) were found in all cases, with an excellent match between the theoretical and observed isotope distributions. However, the 3:1 stoichiometry used in the synthesis guarantees an empirical formula Gn(3)Ln for the complexes.

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Inert and stable erbium(III)-cored complexes based on metalloporphyrins bearing aryl-ether dendron for optical amplification: synthesis and emission enhancement

Cited by 48 publications

References 40 publications

Novel extended π-conjugated Zn(II)-porphyrin derivatives bearing pendant triphenylamine moiety for dye-sensitized solar cell: synthesis and characterization

Novel extended π-conjugated Zn(II)-porphyrin derivatives bearing pendant triphenylamine moiety for dye-sensitized solar cell: synthesis and characterization

Effects of Progressive Halogen Substitution on the Photoluminescence Properties of an Erbium−Porphyrin Complex

A MALDI‐TOF MS study of lanthanide(III)‐cored poly(phenylenevinylene) dendrimers

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