Virgili Tersilla, Ganzer Lucia, Squeo Benedetta Maria, Calzolari Arrigo, Pasini Mariacecilia
Istituto di Fotonica e Nanotecnologia-CNR, IFN-Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
Istituto di Scienze e Tecnologie Chimiche "Giulio Natta"-SCITEC-CNR, via Corti, 20132 Milano, Italy.
Molecules. 2024 Jun 3;29(11):2625. doi: 10.3390/molecules29112625.
4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY)-based molecules have emerged as interesting materials for optoelectronic applications due to the possibility to easily fine-tune their photophysical and optical properties, dominated by two main absorption bands in the visible range. However, no studies have been reported on the nature of these spectral features. By means of ultrafast spectroscopy, we detect intramolecular energy transfer in a spin-coated film of di-thieno-phenyl BODIPY (DTPBDP) dispersed in a polystyrene matrix after pumping the high-energy absorption band. The same effect is not present upon pumping the lowest-energy band, which instead allows the achievement of efficient amplified spontaneous emission. Density functional calculations indicate the different nature of the two main absorption bands, explaining their different photophysical behavior.
基于4,4-二氟-4-硼-3a,4a-二氮杂-s-茚（BODIPY）的分子已成为光电子应用中有趣的材料，因为可以轻松微调其光物理和光学性质，其主要由可见范围内的两个主要吸收带主导。然而，尚未有关于这些光谱特征本质的研究报道。通过超快光谱，我们在泵浦高能吸收带后，检测了分散在聚苯乙烯基质中的二噻吩基苯基BODIPY（DTPBDP）旋涂膜中的分子内能量转移。泵浦最低能量带时不存在相同的效应，但这反而能够实现高效的放大自发发射。密度泛函计算表明了两个主要吸收带的不同性质，解释了它们不同的光物理行为。
