Authors: Christof Woell
Source: ECS Meeting Abstracts (article, 2025-07-11)
Field: Materials Science — Materials Chemistry

Putting Phthalocyanines and Porphyrins to Work: Integration into Devices Using the SURMOF Approach This talk explores the strategic development of advanced metal-organic frameworks (MOFs) using porphyrins and phthalocyanines as chromophoric building blocks, with a focus on their integration into photoactive and electronic devices. Highlighted applications include energy storage, sensing, catalysis, photovoltaics, and photon upconversion in diode production. Leveraging the MOF approach, we demonstrate the assembly of crystalline materials with tailored functionalities, particularly through the layer-by-layer (LbL) deposition of surface-anchored MOF (SURMOF) thin films [1]. A key innovation involves the synthesis of a novel ditopic ABAB-phthalocyanine linker by avoiding statistical condensation with tailored building blocks, used for the growth of zinc-based SURMOFs. These materials exhibit superior electronic absorption properties and robust photophysical behavior, as revealed by UV-Vis spectroscopy, X-ray diffraction, SEM, and DFT calculations. A standout application is a photodetector capable of operating in the long-wavelength regime (780 nm), demonstrating potential in light harvesting and energy conversion [2,3]. Furthermore, the structural effects of porphyrin arrays on band structures and the incorporation of nanoparticles or quantum dots for second harmonic generation (SHG) will be discussed [4,5]. Addressing challenges like stable electrical contacts and high optical quality, the talk introduces methods for crafting highly oriented and uniform SURMOFs on conductive and transparent surfaces. These advancements enable the development of sensor systems optimized through automated research methods and machine learning (ML) algorithms [6,7]. The presentation concludes with insights into the integration of functional additives and the potential for SURMOFs to drive automated, high-throughput research [8]. References: [1] J. Liu, Ch. Wöll, Chem. Soc. Rev., 2017 , 46, 5730-5770 [2] L. Heinke, Ch. Wöll, Adv. Mater., 2019 , 31 (26), 1970184 [3] R. Haldar, L. Heinke, Ch. Wöll, Adv. Mater., 2020 , 32, 1905 [4] A. Chandresh, X. Liu, Ch. Wöll, L. Heinke, Adv. Sci., 2021 , 8, 2001884 [5] J. Liu, W. Zhou, J. Liu, I. Howard, G. Kilibarda, S. Schlabach, D. Coupry, M. Addicoat, S. Yoneda, Y. Tsutsui, T. Sakurai, S. Seki, Z. Wang, P. Lindemann, E. Redel, Th. Heine, Ch. Wöll, Angew. Chemie Int. Ed., 54, 7441 (2015) [6] A. Nefedov, R. Haldar, Zh. Xu, H. Kühner, D. Hofmann, D. Goll, B. Sapotta, S. Hecht, M. Krstić, C. Rockstuhl, W. Wenzel, S. Bräse, P. Tegeder, E. Zojer, Ch. Wöll, Adv. Mater., 2021 , 33, 2103287 [7] L. Pilz, C. Natzeck, J. Wohlgemuth, N. Scheuermann, P.G. Weidler, I. Wagner, Ch. Wöll, M. Tsotsalas, Adv. Mat. Interfaces, 2201771 (2023) [8] L. Pilz, C. Natzeck, J. Wohlgemuth, N. Scheuermann, S. Spiegel, S. Oßwald, A. Knebel, S. Bräse, C. Wöll, M. Tsotsalas, N. Prasetya, J. Mater. Chem. A, (2023), 11, 24724–24737 Work (physics) ; Porphyrin ; Nanotechnology ; Computer science ; Materials science ; Chemistry ; Engineering ; Photochemistry ; Mechanical engineering Porphyrin and Phthalocyanine Chemistry