Photophysical and photoelectric properties of phthalocyanine-based MOF thin films

SPP第二个资助期项目的总体目标是在导电和/或透明衬底上制造基于发色团的晶体和定向MOF薄膜（surmof）。除了卟啉（PPs）外，我们还将研究酞菁（PCs）和卟啉（PYs），这两种物质都能吸收更长的波长，因此与在上一个资助期内成功研究的PPs形成了很好的互补。采用光物理和电化学方法对单片SURMOF涂层进行表征。在选定的情况下，这些薄膜将集成到特定应用的器件中，例如用于光伏。这项工作将补充在第一个资助期内活跃的基于pp的SURMOFs的成功项目，并将利用pc和PYs的更高稳定性用于设备制造，特别是在光伏和光电化学领域。在之前的资助期间，我们从基于pp的SURMOF光物理性质的理论描述中获得的经验将用于筛选大量的pc和PYs。这一步是强制性的，因为pc和PYs的合成比PPs更具挑战性。只有最有前途的PC和PY候选者将被合成并用于制造surmof。此外，层接层的SURMOF生长过程允许携带不同吸收范围染料的SURMOF分层生长。连续堆叠的PPs， pc和PYs吸收增加的波长范围将允许光伏器件的设计覆盖整个太阳光谱，从紫外线到红外线。

The overarching goal of the project proposed for the second funding period of the SPP is the fabrication of chromophore-based, crystalline and oriented MOF thin films (SURMOFs) on conducting and/or transparent substrates. Besides porphyrins (PPs), we will study phthalocyanines (PCs) and porphyrazines (PYs), both absorbing at longer wavelengths and hence nicely complementary to the PPs, which were successfully studied during the previous funding period. The monolithic SURMOF coatings will be characterized using photophysical and electrochemical methods. In selected cases, these films will be integrated in devices for specific applications, e.g. for photovoltaics. This work will complement the successful project on PP-based SURMOFs active during the first funding period and will exploit the higher stability of PCs and PYs for device fabrication, in particular in the area of photovoltaics and photo-electrochemistry. Our experience gained with the theoretical description of PP-based SURMOF photophysical properties during the previous funding period will be used to screen a large number of PCs and PYs in silico. This step is mandatory, since the synthesis of PCs and PYs is much more challenging as in case of the PPs. Only the most promising PC and PY candidates will then be synthesized and used to fabricate SURMOFs. Moreover, the layer-by-layer SURMOF growth process allows the hierarchical growth of SURMOFs carrying dyes of different absorption range. Consecutive stacking of PPs, PCs and PYs with absorption in increasing wavelength ranges will allow the design of photovoltaic devices with covering the entire solar spectrum, ranging from ultraviolet to infrared.