Single-component Eu3+–Tb3+–Gd3+-grafted polymer with ultra-high color rendering index white-light emission. Issue 11 (20th January 2017)

• Record Type: Journal Article
• Authors: Liu, Lin; Fu, Guorui; Li, Baoning; Lü, Xingqiang; Wong, Wai-Kwok; Jones, Richard A.
• Is Part Of: RSC advances. Volume 7:Issue 11(2017)
• Page Start: 6762
• Page End: 6771
• Publication Date: 2017-01-20
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra26724f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Color-tuning to white-light (CIE coordinates of x = 0.322, y = 0.331; CCT of 5979 K; ultra-high CRI of 94) with a highly luminous efficiency (17.8%) was achieved for single-component Eu 3+ −Tb 3+ −Gd 3+ -grafted polymerPoly(MMA- co -2- co -3- co -4) . Abstract : Through an approach of pre-coordination and following terpolymerization from vinyl-functionalized complex monomers [Ln(TTA)3 (4-VB-PBI)] (Ln = Eu, 2 ; Ln = Tb, 3 and Ln = Gd, 4 ; HTTA = 2-thenoyltrifluoroacetonate; 4-VB-PBI = 1-(4-vinylbenzyl)-2-(pyridin-2-yl)-1 H -benzo[ d ]imidazole) with methyl methacrylate, the first example of a single-component Eu 2+ –Tb 3+ –Gd 3+ -grafted polymerPoly(MMA- co -2- co -3- co -4) was obtained. Moreover, control of an optimal dye content for suppressing Tb 3+ to Eu 3+ energy transfer and exciton formation provides new perspectives for hetero-Ln 3+ -grafted polymers as featured inPoly(MMA- co -2- co -3- co -4) with color-tuning to direct white-light (Commission International De L'Eclairage coordinates of x = 0.322, y = 0.331; corrected color temperature of 5979 K; and color rendering index up to 94), including a highly luminous efficiency of 17.8%.