Dr. rer. nat. Michael Pätzel

Profil

Zusammenfassung

Dr. Pätzel entwickelt und synthetisiert organische Moleküle mit gezielten Funktionen, insbesondere photochrome Schalter und Stickstoff-Heterocyclen. Seine Expertise liegt in der präzisen chemischen Synthese komplexer Molekülstrukturen, der Optimierung ihrer Schalt- und Elektroneneigenschaften sowie der Oberflächenmodifizierung für optoelektronische Anwendungen. Diese Kompetenzen sind für die Entwicklung von licht- oder elektrisch steuerbaren Materialien und Bauelementen praktisch relevant.

Skills

Name

Dr. rer. nat. Michael Pätzel

Titel

Dr. rer. nat.

Fakultät

Mathematisch-Naturwissenschaftliche Fakultät

Institut

Institut für Chemie

Arbeitsgruppe

Organische Chemie und Funktionale Materialien

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HU-FIS-Profil

Quelle ↗

Zuletzt gescrapt

28.6.2026, 01:10:39

• Durchführung und Bewertung von Spezialsynthesen für zehn Modellsubstanzen

  Quelle ↗

  Zeitraum: 02/2006 - 12/2006 Projektleitung: Dr. rer. nat. Michael Pätzel

• Herstellung heterocycl. Stickstoffverbindungen

  Quelle ↗

  Zeitraum: 05/2007 - 12/2007 Projektleitung: Dr. rer. nat. Michael Pätzel

• Synthesen von Modellsubstanzen (Nitrifikationsinhibitoren))

  Quelle ↗

  Förderer: Wirtschaftsunternehmen / gewerbliche Wirtschaft Zeitraum: 02/2005 - 12/2006 Projektleitung: Dr. rer. nat. Michael Pätzel

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• Improving the Fatigue Resistance of Diarylethene Switches

  2015

  Journal of the American Chemical Society · 389 Zitationen · DOI

  When applying photochromic switches as functional units in light-responsive materials or devices, an often disregarded yet crucial property is their resistance to fatigue during photoisomerization. In the large family of diarylethene photoswitches, formation of an annulated isomer as a byproduct of the photochromic reaction turns out to prevent the desired high reversibility for many different derivatives. To overcome this general problem, we have synthesized and thoroughly investigated the fatigue behavior of a series of diarylethenes, varying the nature of the hetaryl moieties, the bridging units, and the substituents. By analysis of photokinetic data, a quantification of the tendency for byproduct formation in terms of quantum yields could be achieved, and a strong dependency on the electronic properties of the substituents was observed. In particular, substitution with 3,5-bis(trifluoromethyl)phenyl or 3,5-bis(pentafluorosulfanyl)phenyl groups strongly suppresses the byproduct formation and opens up a general strategy to construct highly fatigue-resistant diarylethene photochromic systems with a large structural flexibility.

• Optically switchable transistor via energy-level phototuning in a bicomponent organic semiconductor

  2012

  Nature Chemistry · 247 Zitationen · DOI

• Tuning the Work Function of Polar Zinc Oxide Surfaces using Modified Phosphonic Acid Self‐Assembled Monolayers

  2014

  Advanced Functional Materials · 207 Zitationen · DOI

  Zinc oxide (ZnO) is regarded as a promising alternative material for transparent conductive electrodes in optoelectronic devices. However, ZnO suffers from poor chemical stability. ZnO also has a moderate work function (WF), which results in substantial charge injection barriers into common (organic) semiconductors that constitute the active layer in a device. Controlling and tuning the ZnO WF is therefore necessary but challenging. Here, a variety of phosphonic acid based self‐assembled monolayers (SAMs) deposited on ZnO surfaces are investigated. It is demonstrated that they allow the tuning the WF over a wide range of more than 1.5 eV, thus enabling the use of ZnO as both the hole‐injecting and electron‐injecting contact. The modified ZnO surfaces are characterized using a number of complementary techniques, demonstrating that the preparation protocol yields dense, well‐defined molecular monolayers.

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