Stefan Hecht (30 November 2020)

Stefan Hecht (born 6 January 1974) is a German chemist.

Life

Hecht was born in 1974 in East Berlin.[1] He studied chemistry from 1992 to 1997 at the Humboldt-Universität zu Berlin and the University of California, Berkeley, where he carried out his diploma thesis research with the late William G. Dauben about "New Mechanistic Insight into the Lumiketone Rearrangement – Wavelength-Dependent Photochemistry of 4-Methoxybicyclo[3.1.0]hex-3-en-2-ones".[2] After his diploma in chemistry, he carried out his graduate work from 1997 to 2001 on the "Synthesis and Application of Functional Branched Macromolecules – From Site Isolation and Energy Harvesting to Catalysis" in the research group of Jean Fréchet at the University of California, Berkeley.

After his return to Germany in the fall of 2001, Hecht established his independent research program as one of the first Sofja Kovalevskaja Awardees, initially as a Young Investigator at the Freie Universität Berlin and since 2005 as group leader at the Max Planck Institute for Coal Research in Mülheim upon Ruhr. In the fall of 2006 he became the youngest W3-professor in chemistry in Germany and holder of the chair of organic chemistry and functional materials at Humboldt-Universität zu Berlin. From 2019 until 2022 he was the scientific director of the DWI – Leibniz Institute for Interactive Materials in Aachen and held the chair for macromolecular chemistry at RWTH Aachen University. Since the fall of 2022 he is Einstein Professor[3] at Humboldt-Universität zu Berlin and founding director of the Center for the Science of Materials Berlin (CSMB).

Hecht is co-founder of the start-up company xolo GmbH that has been developing and commercializing xolography as new volumetric 3D printing technology since 2019.

He is married and father of two adult daughters.

Research

Hecht is a synthetic chemist with research interests that span from macromolecular and supramolecular chemistry over photochemistry and electrochemistry all the way to surface and interface phenomena. Particular focus of his work is on the development of photoswitchable molecules to optically control of physical, chemical, and biological processes and their application in materials, (opto)electronic devices, and additive manufacturing.

Together with Leonhard Grill, Hecht has pioneered the development of "On-Surface Polymerization"[4][5] as a new precision synthesis method for 1D and 2D nanostructures, such as molecular wires,[6] graphene ribbons, and networks.[7]

Hecht has made several seminal contribution in the area of photochromism by significantly improving the properties of molecular photoswitches and by exploiting them in a variety of applications. For example, he could address azobenzene by an electric field[8][9] or by electron/hole catalysis,[10][11] establish ortho-fluoroazobenzenes as solely visible light switchable and thermally stable photoswitches,[12] develop extremely fatigue resistant diarylethenes[13] as well as photoswitches based on acylhydrazones[14] and indigos,[15] and moreover design dihydropyrenes that allow for single NIR photon switching.[16][17] His photoswitches enable to control and drive various processes (folding,[18][19][20] reactivity,[21][22] and catalysis[23][24][25]), materials (self-healing[26][27] and detection[28][29]), and devices (transistors,[30] memories,[31] displays[32]) and actuators.[33]

Together with Martin Regehly he has invented xolography.[34] Xolography is a volumetric 3D printing method, which enables the rapid manufacturing of complex objects and entire systems directly in volume with high precision (resolution) and high material quality (homogeneous material with smooth surfaces). The technology and its application in additive manufacturing are being developed by the start-up company xolo GmbH, which he helped to co-found.

Awards

Source:[35][36][37]

References

  1. ↑ Curriculum Vitae der European Academy of Sciences retrieved 1 January 2022.
  2. ↑ Dauben, William G.; Hecht, Stefan (1998). "Wavelength-Dependent Photochemistry of 4-Methoxybicyclo[3.1.0]hexenones †". The Journal of Organic Chemistry. 63 (18): 6102–6107. doi:10.1021/jo970978n. ISSN 0022-3263. PMID 11672235.
  3. ↑ "Stefan Hecht – Einstein Foundation Berlin". www.einsteinfoundation.de. Retrieved 18 February 2023.
  4. ↑ Grill, Leonhard; Dyer, Matthew; Lafferentz, Leif; Persson, Mats; Peters, Maike V.; Hecht, Stefan (2007). "Nano-architectures by covalent assembly of molecular building blocks". Nature Nanotechnology. 2 (11): 687–691. Bibcode:2007NatNa...2..687G. doi:10.1038/nnano.2007.346. ISSN 1748-3387. PMID 18654406.
  5. ↑ Grill, Leonhard; Hecht, Stefan (2020). "Covalent on-surface polymerization". Nature Chemistry. 12 (2): 115–130. Bibcode:2020NatCh..12..115G. doi:10.1038/s41557-019-0392-9. ISSN 1755-4330. PMID 31996811. S2CID 210949547.
  6. ↑ Lafferentz, L.; Ample, F.; Yu, H.; Hecht, S.; Joachim, C.; Grill, L. (27 February 2009). "Conductance of a Single Conjugated Polymer as a Continuous Function of Its Length". Science. 323 (5918): 1193–1197. Bibcode:2009Sci...323.1193L. doi:10.1126/science.1168255. ISSN 0036-8075. PMID 19251624. S2CID 206517371.
  7. ↑ Lafferentz, L.; Eberhardt, V.; Dri, C.; Africh, C.; Comelli, G.; Esch, F.; Hecht, S.; Grill, L. (2012). "Controlling on-surface polymerization by hierarchical and substrate-directed growth". Nature Chemistry. 4 (3): 215–220. Bibcode:2012NatCh...4..215L. doi:10.1038/nchem.1242. ISSN 1755-4330. PMID 22354436.
  8. ↑ Alemani, Micol; Peters, Maike V.; Hecht, Stefan; Rieder, Karl-Heinz; Moresco, Francesca; Grill, Leonhard (2006). "Electric Field-Induced Isomerization of Azobenzene by STM". Journal of the American Chemical Society. 128 (45): 14446–14447. doi:10.1021/ja065449s. ISSN 0002-7863. PMID 17090013.
  9. ↑ Dri, Carlo; Peters, Maike V.; Schwarz, Jutta; Hecht, Stefan; Grill, Leonhard (2008). "Spatial periodicity in molecular switching". Nature Nanotechnology. 3 (11): 649–653. Bibcode:2008NatNa...3..649D. doi:10.1038/nnano.2008.269. ISSN 1748-3387. PMID 18989329.
  10. ↑ Goulet-Hanssens, Alexis; Utecht, Manuel; Mutruc, Dragos; Titov, Evgenii; Schwarz, Jutta; Grubert, Lutz; Bléger, David; Saalfrank, Peter; Hecht, Stefan (11 January 2017). "Electrocatalytic Z → E Isomerization of Azobenzenes". Journal of the American Chemical Society. 139 (1): 335–341. doi:10.1021/jacs.6b10822. ISSN 0002-7863. PMID 27997152.
  11. ↑ Goulet-Hanssens, Alexis; Rietze, Clemens; Titov, Evgenii; Abdullahu, Leonora; Grubert, Lutz; Saalfrank, Peter; Hecht, Stefan (2018). "Hole Catalysis as a General Mechanism for Efficient and Wavelength-Independent Z → E Azobenzene Isomerization". Chem. 4 (7): 1740–1755. doi:10.1016/j.chempr.2018.06.002.
  12. ↑ Bléger, David; Schwarz, Jutta; Brouwer, Albert M.; Hecht, Stefan (26 December 2012). "o -Fluoroazobenzenes as Readily Synthesized Photoswitches Offering Nearly Quantitative Two-Way Isomerization with Visible Light". Journal of the American Chemical Society. 134 (51): 20597–20600. doi:10.1021/ja310323y. ISSN 0002-7863. PMID 23236950.
  13. ↑ Herder, Martin; Schmidt, Bernd M.; Grubert, Lutz; Pätzel, Michael; Schwarz, Jutta; Hecht, Stefan (25 February 2015). "Improving the Fatigue Resistance of Diarylethene Switches". Journal of the American Chemical Society. 137 (7): 2738–2747. doi:10.1021/ja513027s. ISSN 0002-7863. PMID 25679768.
  14. ↑ van Dijken, Derk Jan; Kovaříček, Petr; Ihrig, Svante P.; Hecht, Stefan (2 December 2015). "Acylhydrazones as Widely Tunable Photoswitches". Journal of the American Chemical Society. 137 (47): 14982–14991. doi:10.1021/jacs.5b09519. ISSN 0002-7863. PMID 26580808.
  15. ↑ Huang, Chung-Yang; Bonasera, Aurelio; Hristov, Lachezar; Garmshausen, Yves; Schmidt, Bernd M.; Jacquemin, Denis; Hecht, Stefan (25 October 2017). "N , N ′-Disubstituted Indigos as Readily Available Red-Light Photoswitches with Tunable Thermal Half-Lives". Journal of the American Chemical Society. 139 (42): 15205–15211. doi:10.1021/jacs.7b08726. hdl:10447/369181. ISSN 0002-7863. PMID 29019401.
  16. ↑ Klaue, Kristin; Garmshausen, Yves; Hecht, Stefan (26 January 2018). "Taking Photochromism beyond Visible: Direct One-Photon NIR Photoswitches Operating in the Biological Window". Angewandte Chemie International Edition. 57 (5): 1414–1417. doi:10.1002/anie.201709554. PMID 29243389.
  17. ↑ Klaue, Kristin; Han, Wenjie; Liesfeld, Pauline; Berger, Fabian; Garmshausen, Yves; Hecht, Stefan (8 July 2020). "Donor–Acceptor Dihydropyrenes Switchable with Near-Infrared Light". Journal of the American Chemical Society. 142 (27): 11857–11864. doi:10.1021/jacs.0c04219. ISSN 0002-7863. PMID 32476422. S2CID 219170353.
  18. ↑ Khan, Anzar; Kaiser, Christian; Hecht, Stefan (13 March 2006). "Prototype of a Photoswitchable Foldamer". Angewandte Chemie International Edition. 45 (12): 1878–1881. doi:10.1002/anie.200503849. ISSN 1433-7851. PMID 16425323.
  19. ↑ Yu, Zhilin; Hecht, Stefan (11 February 2011). "Reversible and Quantitative Denaturation of Amphiphilic Oligo(azobenzene) Foldamers". Angewandte Chemie International Edition. 50 (7): 1640–1643. doi:10.1002/anie.201006084. PMID 21308922.
  20. ↑ Yu, Zhilin; Hecht, Stefan (16 December 2013). "Control over Unfolding Pathways by Localizing Photoisomerization Events within Heterosequence Oligoazobenzene Foldamers". Angewandte Chemie International Edition. 52 (51): 13740–13744. doi:10.1002/anie.201307378. PMID 24254380.
  21. ↑ Göstl, Robert; Hecht, Stefan (11 August 2014). "Controlling Covalent Connection and Disconnection with Light". Angewandte Chemie International Edition. 53 (33): 8784–8787. doi:10.1002/anie.201310626. PMID 24616208.
  22. ↑ Kathan, Michael; Eisenreich, Fabian; Jurissek, Christoph; Dallmann, Andre; Gurke, Johannes; Hecht, Stefan (2018). "Light-driven molecular trap enables bidirectional manipulation of dynamic covalent systems". Nature Chemistry. 10 (10): 1031–1036. Bibcode:2018NatCh..10.1031K. doi:10.1038/s41557-018-0106-8. ISSN 1755-4330. PMID 30104723. S2CID 51979275.
  23. ↑ Peters, Maike V.; Stoll, Ragnar S.; Kühn, Andreas; Hecht, Stefan (28 July 2008). "Photoswitching of Basicity". Angewandte Chemie International Edition. 47 (32): 5968–5972. doi:10.1002/anie.200802050. PMID 18624316.
  24. ↑ Stoll, Ragnar S.; Peters, Maike V.; Kuhn, Andreas; Heiles, Sven; Goddard, Richard; Bühl, Michael; Thiele, Christina M.; Hecht, Stefan (14 January 2009). "Photoswitchable Catalysts: Correlating Structure and Conformational Dynamics with Reactivity by a Combined Experimental and Computational Approach". Journal of the American Chemical Society. 131 (1): 357–367. doi:10.1021/ja807694s. ISSN 0002-7863. PMID 19061327.
  25. ↑ Eisenreich, Fabian; Kathan, Michael; Dallmann, Andre; Ihrig, Svante P.; Schwaar, Timm; Schmidt, Bernd M.; Hecht, Stefan (2018). "A photoswitchable catalyst system for remote-controlled (co)polymerization in situ". Nature Catalysis. 1 (7): 516–522. doi:10.1038/s41929-018-0091-8. ISSN 2520-1158. S2CID 52082891.
  26. ↑ Kathan, Michael; Kovaříček, Petr; Jurissek, Christoph; Senf, Antti; Dallmann, Andre; Thünemann, Andreas F.; Hecht, Stefan (24 October 2016). "Control of Imine Exchange Kinetics with Photoswitches to Modulate Self-Healing in Polysiloxane Networks by Light Illumination". Angewandte Chemie International Edition. 55 (44): 13882–13886. doi:10.1002/anie.201605311. PMID 27391109.
  27. ↑ Fuhrmann, Anne; Göstl, Robert; Wendt, Robert; Kötteritzsch, Julia; Hager, Martin D.; Schubert, Ulrich S.; Brademann-Jock, Kerstin; Thünemann, Andreas F.; Nöchel, Ulrich; Behl, Marc; Hecht, Stefan (2016). "Conditional repair by locally switching the thermal healing capability of dynamic covalent polymers with light". Nature Communications. 7 (1): 13623. Bibcode:2016NatCo...713623F. doi:10.1038/ncomms13623. ISSN 2041-1723. PMC 5159900. PMID 27941924.
  28. ↑ Valderrey, Virginia; Bonasera, Aurelio; Fredrich, Sebastian; Hecht, Stefan (6 February 2017). "Light-Activated Sensitive Probes for Amine Detection". Angewandte Chemie International Edition. 56 (7): 1914–1918. doi:10.1002/anie.201609989. PMID 28090723. S2CID 45574030.
  29. ↑ Fredrich, Sebastian; Bonasera, Aurelio; Valderrey, Virginia; Hecht, Stefan (23 May 2018). "Sensitive Assays by Nucleophile-Induced Rearrangement of Photoactivated Diarylethenes". Journal of the American Chemical Society. 140 (20): 6432–6440. doi:10.1021/jacs.8b02982. ISSN 0002-7863. PMID 29756777.
  30. ↑ Orgiu, Emanuele; Crivillers, Núria; Herder, Martin; Grubert, Lutz; Pätzel, Michael; Frisch, Johannes; Pavlica, Egon; Duong, Duc T.; Bratina, Gvido; Salleo, Alberto; Koch, Norbert (2012). "Optically switchable transistor via energy-level phototuning in a bicomponent organic semiconductor". Nature Chemistry. 4 (8): 675–679. Bibcode:2012NatCh...4..675O. doi:10.1038/nchem.1384. ISSN 1755-4330. PMID 22824901.
  31. ↑ Leydecker, Tim; Herder, Martin; Pavlica, Egon; Bratina, Gvido; Hecht, Stefan; Orgiu, Emanuele; Samorì, Paolo (2016). "Flexible non-volatile optical memory thin-film transistor device with over 256 distinct levels based on an organic bicomponent blend". Nature Nanotechnology. 11 (9): 769–775. Bibcode:2016NatNa..11..769L. doi:10.1038/nnano.2016.87. ISSN 1748-3387. PMID 27323302.
  32. ↑ Hou, Lili; Zhang, Xiaoyan; Cotella, Giovanni F.; Carnicella, Giuseppe; Herder, Martin; Schmidt, Bernd M.; Pätzel, Michael; Hecht, Stefan; Cacialli, Franco; Samorì, Paolo (2019). "Optically switchable organic light-emitting transistors". Nature Nanotechnology. 14 (4): 347–353. Bibcode:2019NatNa..14..347H. doi:10.1038/s41565-019-0370-9. ISSN 1748-3387. PMID 30778212. S2CID 73498421.
  33. ↑ Kumar, Kamlesh; Knie, Christopher; Bléger, David; Peletier, Mark A.; Friedrich, Heiner; Hecht, Stefan; Broer, Dirk J.; Debije, Michael G.; Schenning, Albertus P. H. J. (2016). "A chaotic self-oscillating sunlight-driven polymer actuator". Nature Communications. 7 (1): 11975. Bibcode:2016NatCo...711975K. doi:10.1038/ncomms11975. ISSN 2041-1723. PMC 4932179. PMID 27375235.
  34. ↑ Regehly, Martin; Garmshausen, Yves; Reuter, Marcus; König, Niklas F.; Israel, Eric; Kelly, Damien P.; Chou, Chun-Yu; Koch, Klaas; Asfari, Baraa; Hecht, Stefan (24 December 2020). "Xolography for linear volumetric 3D printing". Nature. 588 (7839): 620–624. Bibcode:2020Natur.588..620R. doi:10.1038/s41586-020-3029-7. ISSN 0028-0836. PMID 33361791. S2CID 229689068.
  35. ↑ Hecht, Stefan. "Group". HechtLab. Retrieved 12 July 2021.
  36. ↑ "UniSysCat: Hecht, Stefan". UniSysCat. Retrieved 12 July 2021.
  37. ↑ Hasani, Ilire; Hoffmann, Robert. "Academy of Europe: Hecht Stefan". Academy of Europe. Retrieved 12 July 2021.
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