Eu(III)- and Tb(III)-coordination polymer luminescent thermometers constructed from a π-rich aromatic ligand exhibiting a high sensitivity. (March 2019)

• Record Type: Journal Article
• Authors: Peng, Xin-Wen; Liu, Qing-Yan; Wang, Hui-Hong; Wang, Yu-Ling
• Is Part Of: Dyes and pigments. Volume 162(2019)
• Page Start: 405
• Page End: 411
• Publication Date: 2019-03
• Subjects: Ratiometric fluorescent probe -- Luminescent thermometer -- Eu(III)- and Tb(III)-Coordination polymer -- Light-harvesting ligand; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2018.10.055
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: A π-rich aromatic organic ligand, 4'-(3, 5-dicarboxyphenyl)-2, 2′, 6′, 2″-terpyridine (H2 -DCPTP), and four new lanthanide coordination polymers, {[Ln(DCPTP)(NO3 )]·(H2 O)} n (Ln = Tb, Eu, Gd) and {[Tb0.9064 Eu0.0936 (DCPTP)(NO3 )]·(H2 O)} n (termed Tb0.9064 Eu0.0936 -DCPTP), were prepared. Compound {[Ln(DCPTP)(NO3 )]·(H2 O)} n is a 3D framework based on the dinuclear Ln2 (μ2 -COO)2 ] units linked by the tridentate DCPTP 2− ligands. The H2 -DCPTP ligand with an appropriate triplet excited state confirmed by DFT calculations and experiments, is a light-harvesting ligand for efficiently sensitizing of Tb 3+ and Eu 3+ simultaneously, thus enhancing the overall luminescent properties of Tb0.9064 Eu0.0936 -DCPTP. The Tb0.9064 Eu0.0936 -DCPTP behaves as a high-performance luminescent thermometer ranging from 150 to 300 K with a large relative thermal sensitivity ( S m ) of 21.5% K −1 and a high energy transfer efficiency ( η ) of 84% at 300 K. Graphical abstract: The 4'-(3, 5-dicarboxyphenyl)-2, 2′, 6′, 2″-terpyridine (H2 -DCPTP) ligand serves as a light-harvesting ligand for efficiently sensitizing of Tb 3+ and Eu 3+ simultaneously, thus enhancing the overall luminescence of Tb0.9064 Eu0.0936 -DCPTP, which behaves as a high-performance luminescent thermometer with a high relative thermal sensitivity of S m up to 21.5% K −1 . Highlights: {[Ln(DCPTP)(NO3 )](H2 O)}n and {[Tb0.9064 Eu0.0936 (DCPTP)(NO3 )](H2 O)}n were presented. The H2 -DCPTP ligand is a light-harvesting ligand for efficiently sensitizing of Tb 3+ and Eu 3+ . Tb0.9064 Eu0.0936 -DCPTP behaves as a high-performance luminescent thermometer. Luminescent thermometer with a high relative thermal sensitivity of S m up to 21.5% K −1 .