[EN] CHEMILUMINESCENT IMIDAZOPYRAZINONE-BASED PHOTOSENSITIZERS WITH AVAILABLE SINGLET AND TRIPLET EXCITED STATES<br/>[FR] PHOTOSENSIBILISATEURS CHIMIOLUMINESCENTS À BASE D'IMIDAZOPYRAZINONE, PRÉSENTANT DES ÉTATS EXCITÉS SINGULETS ET TRIPLETS DISPONIBLES
申请人:UNIV DO PORTO
公开号:WO2019211809A1
公开(公告)日:2019-11-07
The present application describes the development of novel photosensitizers that can undergo self-excitation due to a chemiluminescent reaction, to produce readily-available singlet and/or triplet states and are composed by an imidazopyrazinone core. This core is functionalized with a variety of chromophores and spin converters, allowing to modulate the optical and photosensitizing properties. In one application, the chemiluminescent reaction is triggered by the superoxide anion, overexpressed in tumors, and by molecular oxygen, in aprotic solvents. The photosensitizers can be used in photodynamic therapy of cancer, without the need for external light sources and when triggered by a tumor marker, superoxide anion, while eliminating the restrictions of this therapy associated with tumor size and localization. The emission of light during the self-excitation reaction, and the resulting non-autofluorescence and low background noise, allow their use in tumor diagnostics. The photosensitizers can also be used without light sources and metal elements in photocatalysis reactions.
本申请描述了开发能够通过化学发光反应自激发的新型光敏剂,以产生易获得的单重态和/或三重态状态,并由咪唑吡嗪酮核心组成。该核心经过功能化处理,具有各种色素团和自旋转换器,可以调节光学和光敏性能。在一个应用中,化学发光反应由肿瘤中过度表达的超氧阴离子和分子氧在无极性溶剂中触发。这些光敏剂可用于癌症光动力疗法,无需外部光源,当被肿瘤标记物超氧阴离子触发时,同时消除与肿瘤大小和定位有关的该疗法的限制。在自激发反应期间发射的光和由此产生的非自发荧光和低背景噪音,使其可以用于肿瘤诊断。这些光敏剂也可在光催化反应中无需光源和金属元素的情况下使用。