Optical Properties of Organic-Inorganic Hybrid Mesoporous Materials with Crystal-like Wall Structure

类晶壁结构有机-无机杂化介孔材料的光学性能

• 批准号: 16310094
• 负责人: INAGAKI Shinji
• 金额: $ 6.85万
• 依托单位: Toyota Central R&D Labs., Inc.
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16310094/
• 关键词: Mesoporous material; Organic-inorganic hybrid; Emitted materials; Fluorescence dye; Quantum yield; Organic group; Photosynthesis; メソポーラス物質

We have obtained mainly three results, (1)understanding of fluorescence properties and discovery of unique light harvesting antenna property of mesoporous biphenylylene-silica (BPh-HMM), (2)the synthesis of novel mesoporous organosilicas with optical function, and (3)the construction of an electrical luminescence devices and it's luminescence property, (1)Fluorescence quantum yield of BPh-HMM solid was determined as Φ=0.37-0.56(λ_<ex.>=270,λ_<em.>=370nm) by using an absolute PL Quantum Yield Measurement System (Hamamatsu Photonics). It is higher than the quantum yields of biphenyl (C_6H_5-C_6H_5,Φ=0.07) and biphenyl-disilane precursor [(EtO)_3Si-C_6H_4-C_6H_4-Si(OEt)_3,Φ=0.23]. The high quantum yield for BPh-HMM is generated by the unique arrangement of biphenylylene and silica species, which prevent the fluorescence quenching of biphenylylene species. The excitation energy of biphenylylene was effectively transferred to coumarin dye located in the mesopores. Small addition of coumarin … More dye (0.5 mol% -biphenylylene) completely quenched the biphenylylene fluorescence (λ_<em>=270nm) and in turn emitted strongly coumarin fluorescence (λ_<em>=450nm). The fluorescence quantum yield of coumarin/BP-HMM was almost Φ=1(λ_<ex.>=270,λ_<em.>=450nm). The high quantum yield indicates that mesoporous organosilicas are excellent light harvesting antenna function. (2)We have synthesized new mesoporous organosilicas from optically functional terphenyl, naphthalene, anthracene, pyrene, fluorene, and carbazole-bridged disilane precursors [(EtO)_3Si-R-Si(OEt)_3]. They had absorption bands at 270-400 nm and emission bands at 370-520 nm in visible region, which is merit for applications to visible emitted devices and solar energy conversion devices. (3)We made the electrical emitted devices using mesoporous organosilicas including biphenylylene, anthracene, carbazole as emitted layer sandwiched by electrical and hole injection layers. The devices emitted electrically, but efficiency and life time are insufficient for the actual uses. The wavelength of the emission can be tunable by selecting organic groups in the framework and dyes introduced in the mesopores. These results revealed that mesoporous organosilicas showed excellent photoluminescence and light harvesting antenna properties and have highly potential applications to solar energy conversion system. Less

我们主要获得了三个结果，（1）了解荧光性能并发现介孔双苯基 - 二利 - 二利甲基二元（BPH-HMM）的独特光收集天线特性，（2）新型介嘴孔有机硅质的合成具有光学功能的新型介嘴孔和（3）构建电气发光器具和液体发光设备（1）的（1），并构建液体发光设备（1）。 ASφ= 0.37-0.56（λ_<ex。> = 270，λ_<em。> = 370nm），使用绝对的PL量子屈服测量系统（Hamamatsu Photonics）。它高于双苯基（C_6H_5-C_6H__5，φ= 0.07）和双苯基 - 二硅烷前体[（ETO）_3SI-C_6H_4-C_6H_6H_4-SI（OET）_3，φ= 0.23]。 BPH-HMM的高量子产率是由双苯基烯丙烯和二氧化硅物种的独特排列产生的，这些排列防止了双苯基烯基物种的荧光淬灭。有效地将双苯基乙烯的兴奋能量转移到位于中孔中的香豆素染料。香豆素的少量添加…更多的染料（0.5 mol％ - 二苯基）完全淬灭了双苯基乙烯荧光（λ_<em> = 270nm），然后又发射了强烈的香豆素荧光（λ__= 450nm）。香豆素/bp-hmm的荧光量子产率几乎为φ= 1（λ_<ex。> = 270，λ_<em。> = 450nm）。高量子产率表明介孔有机硅是出色的光收集天线功能。 （2）我们已经从光学功能性苯基苯基，萘，蒽，吡啶，氟和甲壳虫桥的二硅烷前体[（ETO）_3SI-R-SI（OET）_3]合成了新的介孔有机硅。他们在270-400 nm处的滥用带，可见区域的发射带的370-520 nm，这是对可见的发射器件和太阳能转换设备的应用。 （3）我们使用介孔有机硅制造了电气发射的设备，包括双苯基，蒽，甲壳唑，作为发射的层，由电气和孔注入层夹杂。电气发射的设备，但效率和寿命不足以用于实际用途。发射的波长可以通过在中孔中选择框架和染料中选择有机基团来调节。这些结果表明，介孔有机硅具有出色的光子性和光收集天线特性，并且在太阳能转化系统中具有很高的潜在应用。较少的

项目成果

多孔質吸着材ハンドブック

多孔吸附剂手册

• 发表时间: 2005
• 作者: S.Kittaka;T.Matsuda;K.Yamaguchi;A.Yamashita;J.Hedstrom;T.Yamaguchi;S.Kittaka;吉田弘之
• 通讯作者: 吉田弘之