Novel Erbium(III)-Encapsulated Complexes Based on pi-Extended Anthracene Ligands Bearing G3-Aryl-Ether Dendron: Synthesis and Photophysical Studies
- Authors
- Baek, Nam Seob; Kim, Yong Hee; Roh, Soo-Gyun; Lee, Dong Hyun; Seo, Kang Deuk; Kim, Hwan Kyu
- Issue Date
- 9월-2009
- Publisher
- POLYMER SOC KOREA
- Keywords
- Er(III)-encapsulated complexes; pi-extended anthracene ligand; near-IR emission; energy transfer efficiency
- Citation
- MACROMOLECULAR RESEARCH, v.17, no.9, pp.672 - 681
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- MACROMOLECULAR RESEARCH
- Volume
- 17
- Number
- 9
- Start Page
- 672
- End Page
- 681
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/119398
- DOI
- 10.1007/BF03218927
- ISSN
- 1598-5032
- Abstract
- A series of inert and photo-stable Er(III)-encapsulated complexes based on pi-extended dendritic anthracene ligands bearing G3-aryl-ether dendron ([G3-AnX]-CO2H), which retain different pi-bridging systems, such as single (X=S), double (X=D) and triple (X=T) bonds was designed and synthesized to establish the structure-property relationship. The near infrared emission intensities of Er(III)-encapsulated complexes were enhanced dramatically by increasing the pi-conjugated extension of anthracene ligands. The time-resolved luminescence spectra show monoexponential decays with a lifetime of 2.0 similar to 2.4 ms for Er3+ ions in thin films, and calculated intrinsic quantum yields of Er3+ ions are in the range of 0.025 similar to 0.03%. As a result, all Er(Ill)-encapsulated dendrimer complexes exhibit the near IR emission with the following order: Er3+-[G3-AnD](3)(terpy) > Er3+-[G3-AnS](3)(terpy) approximate to Er3+-[G3-AnT](3)(terpy), because Er3+-[G3-AnD](3)(terpy) has a higher relatively spectral overlap J value and energy transfer efficiency. In addition, the lack of detectable phosphorescence and no significant spectral dependence of the pi-extended anthracene moieties on the solvent polarity support energy transfer from their singlet state to the central Er3+ ion taking place in Er3+-[G3-AnX](3)(terpy).
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Graduate School > Department of Advanced Materials Chemistry > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.