New organic–inorganic hybrid materials based on perylene diimide–polyhedral oligomeric silsesquioxane dyes with reduced quenching of the emission in the solid state
New organic–inorganic hybrid materials based on perylene diimide–polyhedral oligomeric silsesquioxane dyes with reduced quenching of the emission in the solid state
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DOI：
10.1016/j.dyepig.2012.11.015
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发表时间：
2013-03
影响因子：
4.5
通讯作者：
E. Lucenti;C. Botta;E. Cariati;S. Righetto;Michele Scarpellini;E. Tordin;R. Ugo
中科院分区：
文献类型：
--
作者：
E. Lucenti;C. Botta;E. Cariati;S. Righetto;Michele Scarpellini;E. Tordin;R. Ugo
从科学和技术的角度来看，固态发光材料越来越受到人们的关注，因为发光材料的高科技应用通常需要在凝聚相中使用它们。然而，聚集引起的猝灭过程对大多数发光体在凝聚相中的发展构成了障碍。这就是为什么那些在固态下表现出高发射强度的材料特别令人着迷。聚集引起的猝灭对于π-延长的多环芳烃特别有害，例如苝四羧酸二酰亚胺，其特征在于在溶液中接近一致的荧光量子产率，但在固态中发射性要低得多。在这里，我们报告了与多面体低聚倍半硅氧烷无机笼连接的苝四羧酸二酰亚胺衍生物的简单制备和光学研究。这些新型杂化苝二酰亚胺-多面体低聚倍半硅氧烷染料在溶液中表现出苝二酰亚胺片段的典型吸收和发射特征，量子效率接近于1。此外，在固态（旋涂薄膜和粉末）下，电子吸收光谱表明荧光团聚集减少，并且由多面体低聚倍半硅氧烷笼的积极作用引起显着的量子产率效率。
Solid state luminescent materials are the subject of ever growing interest both from a scientific and a technological point of view because high-tech applications of light emitting materials very often require their use in the condensed phase. Aggregation caused quenching processes however represent an obstacle to the development of most luminogens in the condensed phase. This is why particularly fascinating are those materials showing high emission intensity in the solid state. Aggregation caused quenching is particularly detrimental for π-extended polycyclic aromatic hydrocarbons, for example perylene tetracarboxylic acid diimides which are characterized by a near-unity fluorescence quantum yield in solution but are far less emissive in the solid state. Here we report on the easy preparation and on the optical investigation of perylene tetracarboxylic acid diimide derivatives linked to the inorganic cage of polyhedral oligomeric silsesquioxanes. These new hybrid perylene diimide–polyhedral oligomeric silsesquioxane dyes show in solution the typical absorption and emission features of the perylene diimide fragment, with a quantum efficiency close to unity. Moreover, in the solid state (both as spin-coated films and powders) the electronic absorption spectra indicate a reduced fluorophore aggregation and significant quantum yield efficiencies induced by the positive effect of the polyhedral oligomeric silsesquioxane cage.