Aggregation enhances luminescence and photosensitization properties of a hexaiodo-BODIPY,Materials Chemistry Frontiers

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Aggregation enhances luminescence and photosensitization properties of a hexaiodo-BODIPY
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020/02/01 , DOI: 10.1039/d0qm00010h
P. P. Praveen Kumar _{1,

2,

3,

4} , Pranjali Yadav _{1,

2,

3,

4} , Asifkhan Shanavas _{1,

2,

3,

4} , Prakash P. Neelakandan _{1,

2,

3,

4}

Affiliation

Intramolecular rotations are known to interfere with the excited-state processes resulting in luminescence quenching. Efforts aimed at restricting intramolecular rotations have led to the development of highly luminescent systems. Here we report the luminescence properties of a BODIPY molecule (I₆) containing six iodo-substituents. The luminescence of I₆ was highly quenched in the solution state whereas the conversion of this molecule into its nanoaggregates enhanced the emission intensity. Detailed photophysical studies and molecular simulations were employed to study the underlying mechanism which showed that the electron-withdrawing nature of iodine atoms and the peculiar structure of I₆ contributed towards the anomalous luminescence behaviour. Further, the luminescence and photosensitization properties of I₆ were exploited for cell imaging and photodynamic therapy. Thus, our simple but intelligent molecular design yielded a multi-faceted molecule having excellent photophysical properties for potential photobiological applications.

中文翻译：

聚集增强了六碘代-BODIPY的发光和光敏特性

已知分子内旋转会干扰激发态过程，从而导致发光猝灭。旨在限制分子内旋转的努力导致了高发光系统的发展。在这里，我们报告包含六个碘取代基的BODIPY分子（I ₆）的发光特性。I ₆的发光在溶液状态下被高度淬灭，而该分子向其纳米聚集体的转化增强了发射强度。通过详细的光物理研究和分子模拟研究了潜在的机理，该机理表明碘原子的吸电子性质和I ₆的特殊结构导致了异常的发光行为。此外，I ₆的发光和光敏特性被用于细胞成像和光动力疗法。因此，我们简单而智能的分子设计就可以为潜在的光生物学应用提供具有出色光物理性质的多面分子。

更新日期：2020-03-05

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