Sensitization of LnIII (Ln = Eu, Tb, Tm) Ion Luminescence by Functionalized Polycarbonate‐Based Materials and White Light Generation. Issue 44 (26th September 2017)

• Record Type: Journal Article
• Authors: Tigaa, Rodney A.; Aerken, Xuekelaiti; Fuchs, Alan; de Bettencourt‐Dias, Ana
• Other Names: Lo Kenneth Kam‐Wing guestEditor.; Charbonnière Loïc J. guestEditor.
• Is Part Of: European journal of inorganic chemistry. Issue 44(2017)
• Page Start: 5310
• Page End: 5317
• Publication Date: 2017-09-26
• Subjects: Lanthanides -- Polycarbonates -- Luminescence -- White light -- Sensitizers; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201700655
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : We prepared pyridine‐2, 6‐bis(ethyl)ester [BEP] and pyridine‐2, 6‐bis(diethylamide) [BDP] polymers with polycarbonate backbones by ring‐opening polymerization of the pyridine‐bis(ethyl)ester and pyridine‐bis(diethylamide) units appended to a cyclic carbonate via a glycol chain. The polymers were characterized by FTIR, NMR, UV/Vis absorption and fluorescence spectroscopy, as well as SEC, powder XRD, DSC, and TGA. The measured glass transition temperature ( T g ) of the BEP polymer was shifted from –32 °C to –7 and –8 °C after coordination of the Eu III and Tb III ions, respectively. Similarly, the T g of the BDP polymer was shifted from –13 °C to –9 and –10 °C after coordination of Eu III and Tb III ions, respectively. Both polymers sensitized Ln III ‐centered emission; the BEP polymer was the most efficient at sensitizing Ln III ‐centered luminescence with an emission efficiency of 30 and 31 % for the Eu III and Tb III systems, respectively, compared to the 2 % determined for both the Eu III and Tb III BDP systems. Blue emission was observed when Tm III was used, and a system with the composition BEP1 Eu1.8 Tb28 led to a material with CIE coordinates (0.31, 0.33), typical of white light. Abstract : Functionalized polycarbonates sensitize red, green, and blue emission from Eu III, Tb III, and Tm III, respectively.