18. Juli 2023

Guest lecture Prof. Dr. Josef Michl Guest lecture Prof. Dr. Josef Michl

Guest lecture on July 18, 2023: "Metalloporphenes, a New Family of Conjugated 2-Dimensional Polymers”

Guest lecture on July 18, 2023: Prof. Dr. Michl
Guest lecture on July 18, 2023: Prof. Dr. Michl © Lonski
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Abstract:

Two-dimensional materials have unusual properties and promise applications in nanoelectronics, spintronics, photonics, etc. Most are inorganic and their properties are difficult to tune. We have prepared Zn porphene, a fully conjugated two-dimensional organic polymers composed of fused porphyrin rings, by oxidative polymerization of a Langmuir bilayer of Zn porphyrin on water surface. It is transferable to other substrates and bridges µm-sized pits. Contrary to previous theoretical predictions, it is a p-type semiconductor due to a distortion of its unit cell from square to rectangular shape, analogous to the appearance of bond-length alternation in antiaromatic molecules. Reversible insertion of metal ions, possibly with a fifth or sixth ligand, promises patterning circuits on an atomic canvas without removing any π centers from conjugation.

Further information about the research group of Prof. Dr. Michl can be found at: https://www.colorado.edu/lab/michlgroup/josef-michl1 or https://michl.group.uochb.cz/en2 .

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