Lanthanides coordination polymers: Enhancement of luminescence and color emission modulation by core–shell shaping

• Published in: Inorganic chemistry communications 2024-12, Vol.170, p.113275, Article 113275
• Main Authors: Morvan, Thibaut, Blais, Chloé, Chang, Aurélien, Daiguebonne, Carole, Suffren, Yan, Audebrand, Nathalie, Calvez, Guillaume, Le Natur, François, Bernot, Kevin, Guillou, Olivier
• Format: Article
• Language: English
• Subjects: Chemical Sciences; Core-shell shaping; Emission color modulation; Intermetallic energy transfers; Lanthanide coordination polymers; Luminescence properties
• ISSN: 1387-7003
• DOI: 10.1016/j.inoche.2024.113275

Core–shell shaping of lanthanide coordination polymers allows an increase in luminescence intensity and in emission color modulation. [Display omitted] •Core–shell shaping reduces intermetallic energy transfers.•Introduction of an intermediate insulating shell reduces intermetallic energy transfers.•Optical dilution of core and shell reduces intermetallic energy transfers.•Core–shell shaping enhances luminescence intensity and emission color modulation. Microcrystalline powders of hetero-lanthanide coordination polymers with 1,4-benzene-dicarboxylate (bdc2−) have been prepared in the form of both molecular alloys and core–shell particles. They are all isostructural to [Tb2(bdc)3(H2O)4]∞ (CCDC n° 1241234). Photo-physical measurements evidence that the core–shell shaping strongly diminish intermetallic energy transfers between the core and the shell. Moreover, this layer-by-layer design allows introduction of an optically non-active insulating layer between the core and the shell. In this system, a 7 nm thick insulating shell reduces by 30 % intermetallic energy transfers between the core and the external shell. Based on these results core–shell microcrystalline sample with unprecedented luminescence properties have been prepared.