Development of the anti-Stokes fluorophore and its application

反斯托克斯荧光团的研制及其应用

• 批准号: 22655033
• 负责人: CHUJO Yoshiki
• 金额: $ 1.98万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22655033/
• 关键词: アップコンバージョン; 三重項-三重項消滅; デンドリマー

The dendrimer complex which can show triplet-triplet annihilation-supported upconversion from visible light to UV light in aqueous solutions was developed. The Pt complex of octaethylporphyrin as a sensitizer and anthracene as an emitter were accumulated into the water-soluble dendrimers, and triplet-triplet annihilation-supported upconversion can efficiently occur in the dendrimer complexes in water. In addition, the fluorescence intensities of the dendritic complexes showed significant dependency on pH. In addition, the influence on the efficiencies of the upconversion by oxygen under biological condition was investigated with the dendrimer complexes containing sensitizers and fluorophores. The emissions via TTA-supported upconversion were significantly depended on the dissolved oxygen(DO) concentrations. It was found from the evaluation of the quantum yields that the degree of the quenching to the triplet-excited states of the sensitizers and the fluorophore by oxygen was responsible for the upconversion efficiency. These data indicate that the environment-responsive upconversion in water can be realized. From these results, it can be said that the purposes of this project were fully accomplished.

开发了一种在水溶液中能显示三重态-三重态湮灭支持的从可见光到紫外光的上转换的树枝状大分子复合物。八乙基卟啉的铂配合物作为敏化剂，蒽作为发光体，在水溶性树枝状大分子中聚集，在水溶液中可以有效地发生三重态-三重态湮灭支持的上转换发光。此外，树枝状复合物的荧光强度表现出显着的依赖性pH值。此外，在生物条件下的上转换效率的影响进行了研究与树枝状复合物含有敏化剂和荧光团。通过TTA支持的上转换的排放显着依赖于溶解氧（DO）浓度。从量子产率的评价中发现，敏化剂和荧光团被氧猝灭到三重激发态的程度是上转换效率的原因。这些数据表明，环境响应的上转换在水中可以实现。从这些结果来看，可以说该项目的目的已经完全实现。

项目成果

Enhancement of affinity in molecular recognition via hydrogen bonds by POSS-core dendrimer and its application for selective complex formation between guanosine triphosphate and 1,8-naphthyridine derivatives.

• DOI: 10.1039/c1ob06630g
• 发表时间: 2012-01
• 期刊: Organic & biomolecular chemistry
• 影响因子: 3.2
• 作者: Kazuo Tanaka;M. Murakami;Jonghwan Jeon;Y. Chujo

rsonic Acid-Presenting Super paramagnetic Iron Oxide for pH-Responsive Aggregation under Slight Acidic Conditions

具有酸性的超顺磁性氧化铁，可在弱酸性条件下实现 pH 响应性聚集

• DOI: 10.1016/j.bmc.2011.02.027
• 发表时间: 2011
• 期刊: Bioorg. Med. Chem
• 作者: Minehara;H.; Naka;K.; Tanaka;K.; Narita;A.; Chujo;Y.
• 通讯作者: Y.

デンドリマーによる水中アップコンバージョンの高効率化と環境応答性の付与

使用树枝状聚合物提高水下上转换的效率并提供环境响应能力

• 发表时间: 2010
• 作者: T.Yoshimi;N.Sugiyama;Y.Takeoka;M.Rikukawa;M.Aizawa;田中一生・大橋亘・中條善樹
• 通讯作者: 田中一生・大橋亘・中條善樹

Side-Chain Effect of Octa-Substituted POSS Fillers on Refraction in Polymer Composites

八取代 POSS 填料对聚合物复合材料折射的侧链效应

• DOI: 10.1002/pola.24370
• 发表时间: 2010
• 期刊: J. Polym. Sci. Part A : Polym. Chem
• 作者: Tanaka;K.; Adachi;S.; Chujo;Y.
• 通讯作者: Y.

高分子薄膜の低屈折率化におけるPOSSフィラーの置換基効果

POSS填料降低聚合物薄膜折射率的取代效应

• 发表时间: 2010
• 作者: 加藤和明;伊藤耕三;尾西尚弥・塩月雅士・三田文雄・青木俊樹・増田俊夫;田中一生・足立茂寛・安田則彦・中條善樹
• 通讯作者: 田中一生・足立茂寛・安田則彦・中條善樹