Stefan Hecht Explained

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]

External links

Notes and References

  1. https://www.eurasc.org/storage/cv/853-1633338611.pdf Curriculum Vitae der European Academy of Sciences
  2. Dauben. William G.. Hecht. Stefan. 1998. Wavelength-Dependent Photochemistry of 4-Methoxybicyclo[3.1.0]hexenones †]. The Journal of Organic Chemistry. en. 63. 18. 6102–6107. 10.1021/jo970978n. 11672235. 0022-3263.
  3. Web site: Stefan Hecht – Einstein Foundation Berlin . 2023-02-18 . www.einsteinfoundation.de.
  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. en. 2. 11. 687–691. 10.1038/nnano.2007.346. 18654406. 2007NatNa...2..687G . 1748-3387.
  5. Grill. Leonhard. Hecht. Stefan. 2020. Covalent on-surface polymerization. Nature Chemistry. en. 12. 2. 115–130. 10.1038/s41557-019-0392-9. 31996811. 2020NatCh..12..115G . 210949547. 1755-4330.
  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. en. 323. 5918. 1193–1197. 10.1126/science.1168255. 19251624 . 2009Sci...323.1193L . 206517371. 0036-8075.
  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. en. 4. 3. 215–220. 10.1038/nchem.1242. 22354436. 2012NatCh...4..215L . 1755-4330.
  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. en. 128. 45. 14446–14447. 10.1021/ja065449s. 17090013. 0002-7863.
  9. Dri. Carlo. Peters. Maike V.. Schwarz. Jutta. Hecht. Stefan. Grill. Leonhard. 2008. Spatial periodicity in molecular switching. Nature Nanotechnology. en. 3. 11. 649–653. 10.1038/nnano.2008.269. 18989329. 2008NatNa...3..649D . 1748-3387. free.
  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. en. 139. 1. 335–341. 10.1021/jacs.6b10822. 27997152. 0002-7863.
  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. en. 4. 7. 1740–1755. 10.1016/j.chempr.2018.06.002. free. 2018Chem....4.1740G .
  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. en. 134. 51. 20597–20600. 10.1021/ja310323y. 23236950. 0002-7863.
  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. en. 137. 7. 2738–2747. 10.1021/ja513027s. 25679768. 0002-7863.
  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. en. 137. 47. 14982–14991. 10.1021/jacs.5b09519. 26580808. 0002-7863.
  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. en. 139. 42. 15205–15211. 10.1021/jacs.7b08726. 29019401. 0002-7863. 10447/369181. free.
  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. en. 57. 5. 1414–1417. 10.1002/anie.201709554. 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. en. 142. 27. 11857–11864. 10.1021/jacs.0c04219. 32476422. 219170353 . 0002-7863.
  18. Khan. Anzar. Kaiser. Christian. Hecht. Stefan. 13 March 2006. Prototype of a Photoswitchable Foldamer. Angewandte Chemie International Edition. en. 45. 12. 1878–1881. 10.1002/anie.200503849. 16425323 . 1433-7851.
  19. Yu. Zhilin. Hecht. Stefan. 11 February 2011. Reversible and Quantitative Denaturation of Amphiphilic Oligo(azobenzene) Foldamers. Angewandte Chemie International Edition. en. 50. 7. 1640–1643. 10.1002/anie.201006084. 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. en. 52. 51. 13740–13744. 10.1002/anie.201307378. 24254380.
  21. Göstl. Robert. Hecht. Stefan. 11 August 2014. Controlling Covalent Connection and Disconnection with Light. Angewandte Chemie International Edition. en. 53. 33. 8784–8787. 10.1002/anie.201310626. 24616208 . free.
  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. en. 10. 10. 1031–1036. 10.1038/s41557-018-0106-8. 30104723 . 2018NatCh..10.1031K . 51979275. 1755-4330.
  23. Peters. Maike V.. Stoll. Ragnar S.. Kühn. Andreas. Hecht. Stefan. 28 July 2008. Photoswitching of Basicity. Angewandte Chemie International Edition. en. 47. 32. 5968–5972. 10.1002/anie.200802050. 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. en. 131. 1. 357–367. 10.1021/ja807694s. 19061327. 0002-7863.
  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. en. 1. 7. 516–522. 10.1038/s41929-018-0091-8. 52082891. 2520-1158.
  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. en. 55. 44. 13882–13886. 10.1002/anie.201605311. 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. en. 7. 1. 13623. 10.1038/ncomms13623. 2041-1723. 5159900. 27941924. 2016NatCo...713623F .
  28. Valderrey. Virginia. Bonasera. Aurelio. Fredrich. Sebastian. Hecht. Stefan. 6 February 2017. Light-Activated Sensitive Probes for Amine Detection. Angewandte Chemie International Edition. en. 56. 7. 1914–1918. 10.1002/anie.201609989. 28090723. 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. en. 140. 20. 6432–6440. 10.1021/jacs.8b02982. 29756777. 0002-7863.
  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. en. 4. 8. 675–679. 10.1038/nchem.1384. 22824901. 2012NatCh...4..675O . 1755-4330.
  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. en. 11. 9. 769–775. 10.1038/nnano.2016.87. 27323302. 2016NatNa..11..769L . 1748-3387.
  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. en. 14. 4. 347–353. 10.1038/s41565-019-0370-9. 30778212. 2019NatNa..14..347H . 73498421. 1748-3387.
  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. en. 7. 1. 11975. 10.1038/ncomms11975. 2041-1723. 4932179. 27375235. 2016NatCo...711975K .
  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. en. 588. 7839. 620–624. 10.1038/s41586-020-3029-7. 33361791. 2020Natur.588..620R . 229689068 . 0028-0836.
  35. Web site: Hecht . Stefan . Group . HechtLab . 12 July 2021.
  36. Web site: UniSysCat: Hecht, Stefan . UniSysCat . 12 July 2021.
  37. Web site: Hasani . Ilire . Hoffmann . Robert . Academy of Europe: Hecht Stefan . Academy of Europe . 12 July 2021.

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