Ruthenium(II)-cored polythiophene dendrimers

Suxiang Deng, Greg Krueger, Prasad Taranekar, Saengrawee Sriwichai, Ruifa Zong, Randolph P. Thummel, Rigoberto C. Advincula

研究成果: Article

22 引用 (Scopus)

抄録

We report the synthesis and characterization of ruthenium(II)-cored polythiophene dendrimers. Four new redox-active ruthenium(II) pyridine oligothiophene dendritic complexes that fluoresce in the near-infrared region have been synthesized, and their absorption spectra, fluorescence properties, and redox behavior have been investigated. The dendritic ligands phen3T and phen7T containing 1,10-phenanthroline as chelating sites and two oligothiophene dendrons (3T6COMe and 7T6COMe) have been synthesized and employed. The metal-polythiophene dendrimers investigated here are [Ru(bpy) 2(phen3T)]2+, [Ru(bpy)2(phen7T)]2+, [Ru(phen3T)3]2+, and [Ru(phen7T)3] 2+. Upon addition of acid, the charge transfer absorption bands of free dendritic ligands are significantly red-shifted and the fluorescence is greatly quenched. The Ru(II) polythiophene dendrimers exhibit very strong metal-to-ligand charge transfer (MLCT) absorption and enhanced absorption in the UV region and can be regarded as better light-harvesting species. The MLCT emission is extraordinarily red-shifted (∼165 nm) because of their planar excited states. The core of the dendrimers shows an electrochemical behavior typical of encapsulated metal electroactive units.

元の言語English
ページ(範囲)3302-3311
ページ数10
ジャーナルChemistry of Materials
23
発行部数14
DOI
出版物ステータスPublished - 2011 7 26
外部発表Yes

Fingerprint

Dendrimers
Ruthenium
Ligands
Charge transfer
Metals
Polymers
Absorption spectra
Fluorescence
Chelation
Excited states
Pyridine
Infrared radiation
Acids
polythiophene
Oxidation-Reduction

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

これを引用

Deng, S., Krueger, G., Taranekar, P., Sriwichai, S., Zong, R., Thummel, R. P., & Advincula, R. C. (2011). Ruthenium(II)-cored polythiophene dendrimers. Chemistry of Materials, 23(14), 3302-3311. https://doi.org/10.1021/cm200228p

Ruthenium(II)-cored polythiophene dendrimers. / Deng, Suxiang; Krueger, Greg; Taranekar, Prasad; Sriwichai, Saengrawee; Zong, Ruifa; Thummel, Randolph P.; Advincula, Rigoberto C.

:: Chemistry of Materials, 巻 23, 番号 14, 26.07.2011, p. 3302-3311.

研究成果: Article

Deng, S, Krueger, G, Taranekar, P, Sriwichai, S, Zong, R, Thummel, RP & Advincula, RC 2011, 'Ruthenium(II)-cored polythiophene dendrimers', Chemistry of Materials, 巻. 23, 番号 14, pp. 3302-3311. https://doi.org/10.1021/cm200228p
Deng S, Krueger G, Taranekar P, Sriwichai S, Zong R, Thummel RP その他. Ruthenium(II)-cored polythiophene dendrimers. Chemistry of Materials. 2011 7 26;23(14):3302-3311. https://doi.org/10.1021/cm200228p
Deng, Suxiang ; Krueger, Greg ; Taranekar, Prasad ; Sriwichai, Saengrawee ; Zong, Ruifa ; Thummel, Randolph P. ; Advincula, Rigoberto C. / Ruthenium(II)-cored polythiophene dendrimers. :: Chemistry of Materials. 2011 ; 巻 23, 番号 14. pp. 3302-3311.
@article{39d9ce5f92f44be787fb8c242ec87b44,
title = "Ruthenium(II)-cored polythiophene dendrimers",
abstract = "We report the synthesis and characterization of ruthenium(II)-cored polythiophene dendrimers. Four new redox-active ruthenium(II) pyridine oligothiophene dendritic complexes that fluoresce in the near-infrared region have been synthesized, and their absorption spectra, fluorescence properties, and redox behavior have been investigated. The dendritic ligands phen3T and phen7T containing 1,10-phenanthroline as chelating sites and two oligothiophene dendrons (3T6COMe and 7T6COMe) have been synthesized and employed. The metal-polythiophene dendrimers investigated here are [Ru(bpy) 2(phen3T)]2+, [Ru(bpy)2(phen7T)]2+, [Ru(phen3T)3]2+, and [Ru(phen7T)3] 2+. Upon addition of acid, the charge transfer absorption bands of free dendritic ligands are significantly red-shifted and the fluorescence is greatly quenched. The Ru(II) polythiophene dendrimers exhibit very strong metal-to-ligand charge transfer (MLCT) absorption and enhanced absorption in the UV region and can be regarded as better light-harvesting species. The MLCT emission is extraordinarily red-shifted (∼165 nm) because of their planar excited states. The core of the dendrimers shows an electrochemical behavior typical of encapsulated metal electroactive units.",
keywords = "dendrimers, metal-to-ligand charge transfer, oligothiophene, ruthenium",
author = "Suxiang Deng and Greg Krueger and Prasad Taranekar and Saengrawee Sriwichai and Ruifa Zong and Thummel, {Randolph P.} and Advincula, {Rigoberto C.}",
year = "2011",
month = "7",
day = "26",
doi = "10.1021/cm200228p",
language = "English",
volume = "23",
pages = "3302--3311",
journal = "Chemistry of Materials",
issn = "0897-4756",
publisher = "American Chemical Society",
number = "14",

}

TY - JOUR

T1 - Ruthenium(II)-cored polythiophene dendrimers

AU - Deng, Suxiang

AU - Krueger, Greg

AU - Taranekar, Prasad

AU - Sriwichai, Saengrawee

AU - Zong, Ruifa

AU - Thummel, Randolph P.

AU - Advincula, Rigoberto C.

PY - 2011/7/26

Y1 - 2011/7/26

N2 - We report the synthesis and characterization of ruthenium(II)-cored polythiophene dendrimers. Four new redox-active ruthenium(II) pyridine oligothiophene dendritic complexes that fluoresce in the near-infrared region have been synthesized, and their absorption spectra, fluorescence properties, and redox behavior have been investigated. The dendritic ligands phen3T and phen7T containing 1,10-phenanthroline as chelating sites and two oligothiophene dendrons (3T6COMe and 7T6COMe) have been synthesized and employed. The metal-polythiophene dendrimers investigated here are [Ru(bpy) 2(phen3T)]2+, [Ru(bpy)2(phen7T)]2+, [Ru(phen3T)3]2+, and [Ru(phen7T)3] 2+. Upon addition of acid, the charge transfer absorption bands of free dendritic ligands are significantly red-shifted and the fluorescence is greatly quenched. The Ru(II) polythiophene dendrimers exhibit very strong metal-to-ligand charge transfer (MLCT) absorption and enhanced absorption in the UV region and can be regarded as better light-harvesting species. The MLCT emission is extraordinarily red-shifted (∼165 nm) because of their planar excited states. The core of the dendrimers shows an electrochemical behavior typical of encapsulated metal electroactive units.

AB - We report the synthesis and characterization of ruthenium(II)-cored polythiophene dendrimers. Four new redox-active ruthenium(II) pyridine oligothiophene dendritic complexes that fluoresce in the near-infrared region have been synthesized, and their absorption spectra, fluorescence properties, and redox behavior have been investigated. The dendritic ligands phen3T and phen7T containing 1,10-phenanthroline as chelating sites and two oligothiophene dendrons (3T6COMe and 7T6COMe) have been synthesized and employed. The metal-polythiophene dendrimers investigated here are [Ru(bpy) 2(phen3T)]2+, [Ru(bpy)2(phen7T)]2+, [Ru(phen3T)3]2+, and [Ru(phen7T)3] 2+. Upon addition of acid, the charge transfer absorption bands of free dendritic ligands are significantly red-shifted and the fluorescence is greatly quenched. The Ru(II) polythiophene dendrimers exhibit very strong metal-to-ligand charge transfer (MLCT) absorption and enhanced absorption in the UV region and can be regarded as better light-harvesting species. The MLCT emission is extraordinarily red-shifted (∼165 nm) because of their planar excited states. The core of the dendrimers shows an electrochemical behavior typical of encapsulated metal electroactive units.

KW - dendrimers

KW - metal-to-ligand charge transfer

KW - oligothiophene

KW - ruthenium

UR - http://www.scopus.com/inward/record.url?scp=79960503128&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79960503128&partnerID=8YFLogxK

U2 - 10.1021/cm200228p

DO - 10.1021/cm200228p

M3 - Article

AN - SCOPUS:79960503128

VL - 23

SP - 3302

EP - 3311

JO - Chemistry of Materials

JF - Chemistry of Materials

SN - 0897-4756

IS - 14

ER -