Guest lecture - Prof. Dr. Josef Michl
University of Colorado, Boulder - "Metalloporphenes, a New Family of Conjugated 2-Dimensional Polymers”⠀
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.
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.
Zeit
Dienstag, 18.07.23 - 17:15 Uhr
Veranstaltungsformat
Vortrag
Themengebiet
Chemie
Referierende
Prof. Dr. Josef Michl
Zielgruppen
Alle Interessierten
Ort
Gerhard-Domagk-Str. 1, 53121
Raum
Hörsaal 2
Reservierung
nicht erforderlich
Veranstalter
Institut für Anorganische Chemie
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