Document Type

Journal Article

Department/Unit

Office of the Vice-President (Research and Development)

Title

The first example of Tb3-containing metallopolymer-type hybrid materials with efficient and high color-purity green luminescence

Language

English

Abstract

© The Royal Society of Chemistry 2015.In the series of homo-leptic trinuclear complexes {[Ln3(L)4Cl4(MeOH)(H2O)]·Cl} (Ln = La, 1; Ln = Eu, 2; Ln = Tb, 3 or Ln = Gd, 4) self-assembled from the allyl-modified benzimidazole-type ligand HL (4-allyl-2-(1H-benzo[d]imidazol-2-yl)-6-methoxyphenol) and LnCl3·6H2O, a suitable energy level match endows efficient green luminescence (Φoverall = 72%) of Tb3-arrayed complex 3. The copolymerization between each of these complex monomers 1-4 and CC-containing MMA (methyl methacrylate) or NBE (norbornene) shows that degradative chain transfer of the terminal four flexible allyl groups within restrains their radical polymerization with MMA while it does not hinder their effective ring-opening metathesis polymerization (ROMP) with NBE. Thus, two kinds of PMMA-supported doping hybrid materials 1@PMMA, 2@PMMA, 3@PMMA and 4@PMMA and PNBE-supported metallopolymer-type hybrid materials Poly(NBE-1), Poly(NBE-2), Poly(NBE-3) and Poly(NBE-4) are obtained, respectively. Especially for both 3@PMMA and Poly(NBE-3) with high color-purity characteristic green emission of Tb3+ ions, improved physical properties including significantly enhanced luminescence (Φoverall = 76% or 83%) are observed, and covalent-bonding endows a higher-concentration self-quenching as compared to physical doping. This journal is

Publication Date

2015

Source Publication Title

Dalton Transactions

Volume

44

Issue

13

Start Page

6229

End Page

6241

Publisher

Royal Society of Chemistry

DOI

10.1039/c5dt00141b

Link to Publisher's Edition

http://dx.doi.org/10.1039/c5dt00141b

ISSN (print)

14779226

ISSN (electronic)

14779234

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