Abstract
A europium(III) hybrid material Eu(tta)3bpdc-SiO2@mTiO2 (Htta = 2-thenoyltrifluoroacetone, H2bpdc = 2,2′-bipyridine-3,3′-dicarboxylic acid) was successfully designed and synthesized by the covalent grafting complex Eu(tta)3bpdc to SiO2@mTiO2 core–shell nanosphere. The FT-IR, PXRD, XPS, TEM, HRTEM, SAED, TGA and PL were performed to characterize these materials. The results indicate that core–shell nanosphere structure and anatase crystallites of SiO2@mTiO2 are retained well after grafting the europium complex. Hybrid material Eu(tta)3bpdc-SiO2@mTiO2 displays uniform nanosphere structure, bright red color and long lifetime, which can serve as a multicolor emission material modulated by using Al3+ ions via the cation exchange approach under a single-wavelength excitation. To the best of our knowledge, this work is the first multicolor emissive sensor for Al3+ ions based on the lanthanide hybrid material.
Highlights
Lanthanide-based luminescent hybrid materials have sharp emission bands, high color purity, long luminescent lifetime and high quantum efficiency
Li et al have achieved some progress in the field of singlecomponent lanthanide-based hybrid materials with multicolor emission [16,17]
Eu(tta)3 bpdc-SiO2 @mTiO2 are exhibited in Scheme 1
Summary
Lanthanide-based luminescent hybrid materials have sharp emission bands, high color purity, long luminescent lifetime and high quantum efficiency. They can act as excellent candidates for multicolor luminescent materials, and further are applied in many fields, such as bio-imaging and bioanalytical detection [1,2], luminescent probes and sensors [3,4,5], tunable luminescence [6,7,8], and optoelectronic devices and displays [9,10,11]. Li et al have achieved some progress in the field of singlecomponent lanthanide-based hybrid materials with multicolor emission [16,17]. To the best of our knowledge, this work is the first multicolor emissive sensor for Al3+ ions based on the lanthanide hybrid material
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