Hybrid EuIII Coordination Luminophore Standing on Two Legs on Silica Nanoparticles for Enhanced Luminescence
Hybrid EuIII Coordination Luminophore Standing on Two Legs on Silica Nanoparticles for Enhanced Luminescence
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混合 EuIII 配位发光体站在二氧化硅纳米粒子上的两条腿上以增强发光
DOI：
10.1002/chem.202102156
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Y. Hasegawa
中科院分区：
文献类型：
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作者：
T. Zhang;Y. Kitagawa;R. Moriake;P. P. Ferreira da Rosa;Md. Jahidul Islam;T. Yoneda;Y. Inokuma;K. Fushimi;Y. Hasegawa
在这项研究中，我们展示了一种用于单色和亮红色发光LnIII-二氧化硅纳米材料的两条腿，直立分子设计方法。通过使用双重结合的TPPO−Si（OEt）3（TPPO：三苯基氧化膦）连接体开发了一种新型的EuIII-二氧化硅混合纳米颗粒。通过1H，31 P，29 Si NMR光谱和单晶X射线分析证实了TPPO−Si（OEt）3。将发光Eu（hfa）3和Eu（tfc）3部分（hfa：六氟乙酰丙酮酸酯，tfc：3-（三氟甲基羟基亚甲基）丙酮酸酯）固定到TPPO−Si（OEt）3改性的二氧化硅纳米颗粒上，分别产生Eu（hfa）3（TPPO−Si）2-SiO2和Eu（tfc）3（TPPO−Si）2-SiO2。Eu（hfa）3（TPPO−Si）2− SiO2具有更高的本征发光量子产率（93%）和更长的发光寿命（0.98 ms），远大于先前报道的EuIII基杂化材料。 Eu（tfc）3（TPPO−Si）2− SiO2显示出超大的本征发射量子产率（54%），尽管发现前体Eu（tfc）3（TPPO−Si（OEt）3）2的发射量子产率为39%。这些结果证实了TPPO−Si（OEt）3linker是开发EuIII基发光材料的有希望的候选者。
In this study, we have demonstrated a two‐legged, upright molecular design method for monochromatic and bright red luminescent LnIII‐silica nanomaterials. A novel EuIII‐silica hybrid nanoparticle was developed by using a doubly binding TPPO−Si(OEt)3(TPPO: triphenyl phosphine oxide) linker. The TPPO−Si(OEt)3was confirmed by1H,31P,29Si NMR spectroscopy and single‐crystal X‐ray analysis. Luminescent Eu(hfa)3and Eu(tfc)3moieties (hfa: hexafluoroacetylacetonate, tfc: 3‐(trifluoromethylhydroxymethylene)camphorate) were fixed onto TPPO−Si(OEt)3‐modified silica nanoparticles, producing Eu(hfa)3(TPPO−Si)2‐SiO2and Eu(tfc)3(TPPO−Si)2‐SiO2, respectively. Eu(hfa)3(TPPO−Si)2−SiO2exhibited the higher intrinsic luminescence quantum yield (93 %) and longer emission lifetime (0.98 ms), which is much larger than those of previously reported EuIII‐based hybrid materials. Eu(tfc)3(TPPO−Si)2−SiO2showed an extra‐large intrinsic emission quantum yield (54 %), although the emission quantum yield for the precursor Eu(tfc)3(TPPO−Si(OEt)3)2was found to be 39 %. These results confirmed that the TPPO−Si(OEt)3linker is a promising candidate for development of EuIII‐based luminescent materials.