Aggregation-induced emission from silole-based lumophores embedded in organic-inorganic hybrid hosts.
Aggregation-induced emission from silole-based lumophores embedded in organic-inorganic hybrid hosts.
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DOI：
10.1039/d1tc02794h
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发表时间：
2021-10-14
期刊：
影响因子：
--
通讯作者：
Evans RC
中科院分区：
文献类型：
--
作者：
Lyu G;Southern TJF;Charles BL;Roger M;Gerbier P;Clément S;Evans RC
聚集诱导的发射体-或AIEgens -通常由它们的光致发光增强作为在不良溶剂中聚集的结果来表征。然而，对于某些应用，优选在固态下诱导AIE响应。在这里，已经探索了有机-无机杂化聚合物主体从嵌入的基于噻咯的发光团诱导AIE响应的能力。我们已经专注于理解掺入方法如何控制发光团聚集的程度，从而控制相关的生物物理性质。为了实现这一目标，基于母体AIEgen 1，1-二甲基-2，3，4，5-四苯基硅杂环戊烯（DMTPS）或甲硅烷基化类似物（DMTPS-Sil）制备了两个样品浓度系列，它们分别物理掺杂或共价接枝到dU（600）-聚（氧化烯）/硅氧烷混合物的尿硅树脂家族的成员。稳态和时间分辨的光致发光测量，再加上共聚焦显微镜研究，揭示了共价接枝导致AIEgen的改进的光致发光，减少散射损失，增加光致发光量子产率（高达约1000）。40%）和改善的化学稳定性。此外，脲二氧化硅还充当光活性主体，其以几乎70%的效率经历激发能量转移到嵌入的DMTPS-Sil。这项研究突出了设计复杂的光致发光混合聚合物表现出增强的AIE响应固态光学应用的潜力。通过共价接枝或物理混合将基于噻咯的发光团并入光活性有机-无机脲二氧化硅主体中通过聚集和主体-客体能量转移导致增强的光致发光。
Aggregation-induced emitters – or AIEgens – are often symbolised by their photoluminescence enhancement as a result of aggregation in a poor solvent. However, for some applications, it is preferable for the AIE response to be induced in the solid-state. Here, the ability of an organic–inorganic hybrid polymer host to induce the AIE response from embedded silole-based lumophores has been explored. We have focussed on understanding how the incorporation method controls the extent of lumophore aggregation and thus the associated photophysical properties. To achieve this, two sample concentration series have been prepared, based on either the parent AIEgen 1,1-dimethyl-2,3,4,5-tetraphenylsilole (DMTPS) or the silylated analogue (DMTPS-Sil), which were physically doped or covalently grafted, respectively, to dU(600) – a member of the ureasil family of poly(oxyalkylene)/siloxane hybrids. Steady-state and time-resolved photoluminescence measurements, coupled with confocal microscopy studies, revealed that covalent grafting leads to improved dispersibility of the AIEgen, reduced scattering losses, increased photoluminescence quantum yields (up to ca. 40%) and improved chemical stability. Moreover, the ureasil also functions as a photoactive host that undergoes excitation energy transfer to the embedded DMTPS-Sil with an efficiency of almost 70%. This study highlights the potential for designing complex photoluminescent hybrid polymers exhibiting an ehanced AIE response for solid-state optical applications. The incorporation of silole-based lumophores into a photoactive organic–inorganic ureasil host via covalent grafting or physical mixing results in enhanced photoluminescence through aggregation and host–guest energy transfer.
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影响因子：
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作者：
Kaniyoor, Adarsh;McKenna, Barry;Evans, Rachel C.
通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
6.4
作者：
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通讯作者：
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