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Reposted by Katja Heinze's research group University of Mainz

ChemistryViews @chemistryviews.bsky.social · 3h

Katja Heinze, Robert Naumann, and Steven Sittel (Mainz) synthesized a series of chromium(III) chromophores with identical optical properties but systematically tunable redox behavior to study photoredox mechanisms
www.chemistryviews.org/independent-...

Design of Chromium(III) Chromophores with Independent Control of Redox and Optical Properties - ChemistryViews

Katja Heinze and Robert Naumann, Mainz, synthesized a series of chromium(III) chromophores with identical optical properties but systematically tunable redox behavior to study photoredox mechanisms

www.chemistryviews.org

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Reposted by Katja Heinze's research group University of Mainz

moth-poulsen.bsky.social @moth-poulsen.bsky.social · 2d

Excited to share the publication of “Enhancing the Statistical Probability Factor in Triplet-Triplet Annihilation Photon Upconversion via TIPS Functionalization” in @chemicalscience.rsc.org

pubs.rsc.org/en/content/a...

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Reposted by Katja Heinze's research group University of Mainz

Sonja Herres-Pawlis @herreslab.bsky.social · 3d

Very happy about this first #catalaix publication for us, supported by the Werner Siemens-Stiftung ! #bioplastics #circulareconomy
We also make the data openly available at @radar-service.bsky.social : radar4chem.radar-service.eu/radar/en/dat...
Thank you to @nfdi4chem.de !

Chemical Science @chemicalscience.rsc.org · 3d

New in Chemical Science!

"Depolymerization of PLA Catalyzed by Guanidine-Modified Microgels" by Andrij Pich and Sonja Herres-Pawlis et al. from RWTH Aachen University and Maastricht University. @herreslab.bsky.social

Read it for free: doi.org/10.1039/D5SC...

A pile of blue and yellow polylactide fibres on a surface. A box zooms into a section and shows a scheme for the depolymerisation of polylactide in methanol with a guanidine-modified microgel catalyst.

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Reposted by Katja Heinze's research group University of Mainz

Ken Lo @bhkenlo.bsky.social · 5d

Thermally Activated and Nonactivated Excited State Decay of [Cr(dgpy)2]3+ | Inorganic Chemistry pubs.acs.org/doi/10.1021/... @LabHeinze and co-workers @InorgChem #chromium #aliphatic #guanidines #thermally_activated_nonactivated #EnT #bISC #spin_flip #VibrationalOvertones #NIR

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Reposted by Katja Heinze's research group University of Mainz

Gesellschaft Deutscher Chemiker (GDCh) @gdch.de · 6d

Die GDCh schließt sich dem Klimaaufruf von DPG und DMG an:
gdch.app/article/gdch...

GDCh schließt sich Klimaaufruf von DMG und DPG an.

Die Gesellschaft Deutscher Chemiker (GDCh) schließt sich dem gemeinsamen Aufruf der Deutschen Meteorologischen Gesellschaft (DMG) und der Deutschen Physikalischen Gesellschaft (DPG) an. „Globale Erwär...

gdch.app

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Reposted by Katja Heinze's research group University of Mainz

Dawid Pinkowicz @pinkowiczgroup.bsky.social · 9d

So happy this piece is finally out! A tremendous collaborative effort of colleagues and friends from 8 institutions all over Europe. Thank you! doi.org/10.1038/s414...
Photochemistry and photophysics in a single crystal @jagiellonskiuni.bsky.social @cleracr.bsky.social @natcomms.nature.com

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Reposted by Katja Heinze's research group University of Mainz

Van Slageren Group @agvsl.bsky.social · 12d

We are looking for postdoctoral candidates in the areas of organic electronics, operando spectroscopy in catalysis, advanced EPR. CV and cover letter to [email protected], stating what complementary expertise you bring and why our group interests you.

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Katja Heinze's research group University of Mainz @labheinze.bsky.social · 26d

Thank you, Lena. 🙏

Reposted by Katja Heinze's research group University of Mainz

C&EN (Chemical & Engineering News) @cenmag.bsky.social · 28d

Researchers at Johannes Gutenberg University Mainz report a manganese complex that stays energized for 190 ns after absorbing light—a record for low-cost abundant metals. cen.acs.org/materials/in... #chemsky 🧪

Manganese edges into the realm of noble-metal photochemistry

Pairing manganese with an off-the-shelf ligand yields a low-cost complex that mimics precious-metal photocatalysts

cen.acs.org

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Reposted by Katja Heinze's research group University of Mainz

Mainz University @mainzuniversity.bsky.social · Aug 27

Common metal, unusual power: New manganese(I) complex breaks lifetime record for excited states / Combination of a #manganese salt and a ligand paves the way for future large-scale applications of #photochemistry 👉 press.uni-mainz.de/common-metal...

#SustainableChemistry #SusInnoScience

The figure shows the molecular structure of the manganese complex (center), a cuvette containing a solution of the purple manganese complex (top left), the absorption spectrum of the complex, which explains its high color intensity (purple), and the luminescence spectrum of the complex, which was used to measure its long lifetime (green). (ill./©: Katja Heinze)

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Katja Heinze's research group University of Mainz @labheinze.bsky.social · Aug 25

From sub-picoseconds to 190 nanoseconds! Replacing #iron (II) by #manganese (I) gives record excited state lifetime. The paper in @natcomms.nature.com ‬reports #coherence, #photoluminescence and excited state #electrontransfer. #earth-abundant metal plus simple #carbene #ligand. rdcu.be/eBWsL

synthesis, absorption and emission spectrum, photoluminescence decay of a manganese(I) complex

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Reposted by Katja Heinze's research group University of Mainz

Christian Limberg @christianlimberg.bsky.social · Aug 22

O2 activation at biomimetic Fe complexes/first O2-dioxygenation mediated by a Co center. onlinelibrary.wiley.com/doi/10.1002/... Great work by Kilian! Thx also to the de Visser group for fruitful collaboration, @dfg.de for funding within the research group “BioOxCat” and @humboldtuni.bsky.social

Promiscuity in Molecular Mimics of the Cysteine Dioxygenase: Effects of Selenium in the Substrate and Cobalt as the Central Metal Ion

A biomimetic model for the cysteine dioxygenase (CDO) was found to be also capable of selectively dioxygenating selenocysteamine, suggesting that the lack of reactivity found for the CDO in combinati....

onlinelibrary.wiley.com

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Reposted by Katja Heinze's research group University of Mainz

Alejandro Cadranel @cadralab.bsky.social · Aug 15

Beautiful work!!
Using fsTA, we discovered that charge separation mediates Energy Transfer in the long-lived⏳ iron complex-anthracene dyad designed and synthesized by Felix Glaser & @ludotroian.bsky.social - just published in ACS Central Science @pubs.acs.org 🥳

t.co/14xmp6kvHS

https://pubs.acs.org/doi/10.1021/acscentsci.5c01040

t.co

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Reposted by Katja Heinze's research group University of Mainz

Andreas Walther @waltherlab.bsky.social · Aug 14

Become my colleague!!! We are recruiting in a junior faculty level. Junior Professor for Theoretical Chemistry of Macromolecular and Supramolecular Systems
#simulations #theory #noneqsys #assistantprofessor #chemjob
Thank you for sharing this.

berufungsportal.uni-mainz.de/ausschreibun...

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Reposted by Katja Heinze's research group University of Mainz

Christian Limberg @christianlimberg.bsky.social · Aug 14

1 week left to apply for a PhD position, 4 y. with 2/3 of E 13 TV-L salary, assigned broadly to the design and synthesis of coordination compds for the activation of small molecules (www.chemie.hu-berlin.de/aglimberg/st...). Pls apply directly to [email protected]. Pls retweet!

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Katja Heinze's research group University of Mainz @labheinze.bsky.social · Jul 24

Brilliant study of using high energy excited states as reactants by Björn Pfund and Oliver Wenger! Speed up k(ET) over k(IC) is the key - explained by Marcus theory. Congratulations!

Oliver Wenger @wengeroliver.bsky.social · Jul 18

We show how photoredox catalysis can bypass Kasha’s rule, enabling reactions from higher excited states.

This work, led by the exceptional @bjoernpfund.bsky.social, offers new insights into photochemical reactivity.

Published in JACS @jacs.acspublications.org

bit.ly/3IysmjX

Breaking Kasha’s Rule to Enable Higher Reactivity in Photoredox Catalysis

Nearly all photochemical transformations known to date follow Kasha’s rule, implying that reactions occur only from the lowest electronically excited state of a given spin multiplicity due to the fast...

bit.ly

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Katja Heinze's research group University of Mainz @labheinze.bsky.social · Jul 22

Did you know that #stannylenes can shine orange and green?
Philipp elucidated the mechanism of the dual #emission, the #excited state #dynamics, #excimer formation and light-induced bond #homolysis. #Maingroup #tin #photophysics #photochemistry onlinelibrary.wiley.com/doi/10.1002/anie.202510044

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Reposted by Katja Heinze's research group University of Mainz

Deutsche Forschungsgemeinschaft @dfg.de · Jul 2

Förderentscheidungen zu #Forschungsgruppen durch den Hauptausschuss der DFG im Rahmen der Jahresversammlung: 7 Neueinrichtungen, 3 Verlängerungen. Die neuen Forschungsgruppen erhalten insges. rund 33 Mio. € für die erste Förderperiode. Mehr zu den Themen / Institutionen: www.dfg.de/de/service/p...

Die DFG richtet 7 neue Forschungsgruppen ein Das Fördervolumen für die Neueinrichtungen beträgt insgesamt 33,4 Mio. Euro für die erste Förderperiode inkl. je 22 % Programmpauschale für indirekte Projektausgaben. 3 Forschungsgruppen werden um eine weitere Förderperiode von vier Jahren verlängert.

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Reposted by Katja Heinze's research group University of Mainz

Christoph Kerzig @ckerzig.bsky.social · Jun 24

The next masterpiece from Matthias focusing on Coulombic dyads as new #photocatalyst class has been accepted in ACIE. Higher quantum yields in red-light catalysis by adding an inexpensive salt to use #Os as efficiently as possible. onlinelibrary.wiley.com/doi/10.1002/... @labheinze.bsky.social

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Katja Heinze's research group University of Mainz @labheinze.bsky.social · Jun 24

Important and detailed photophysical study. Congrats.👍Static quenching of short-lived high-energy excited states is also possible for highly oxidizing manganese(IV) complexes, see doi.org/10.1038/s415.... The solvent plays a key role as quencher and redox mediator in this system.

Oxidative two-state photoreactivity of a manganese(IV) complex using near-infrared light - Nature Chemistry

The design of highly oxidizing Earth-abundant transition metal complexes for photochemical applications is desirable, but progress in this area remains limited. Now a manganese(IV) diguanidylpyridine ...

doi.org

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Reposted by Katja Heinze's research group University of Mainz

Ksenia Glusac @ksenia-glusac.bsky.social · Jun 24

This is a clever way to distinguish PCET from PT/ET pathways: using pressure.

ET/PT mechanisms lead to larger volume changes due to solvation of charged species.

@guldi-group.bsky.social @natchem.nature.com

rdcu.be/etauw

High-pressure pump–probe experiments reveal the mechanism of excited-state proton-coupled electron transfer and a shift from stepwise to concerted pathways

Nature Chemistry - Chemical energy conversion and storage rely on the selective movement of protons and electrons, thus understanding these processes is important for applications. Now experiments...

rdcu.be

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Reposted by Katja Heinze's research group University of Mainz

Johannes Gutenberg-Universität Mainz @unimainz.bsky.social · May 28

Gewinn für #SusInnoSience: Mainzer Chemikerin Katja Heinze wurde durch @humboldt-foundation.de zum "Scout" ernannt und kann nun bis zu 3 exzellente Forschende in frühen Karrierephasen für ein Stipendium der Stiftung vorschlagen und an die #UniMainz einladen 👉 presse.uni-mainz.de/alexander-vo...

Prof. Dr. Katja Heinze, Professorin im Department Chemie der Johannes Gutenberg-Universität Mainz (Foto/©: Eric Lichtenscheid)

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Gesellschaft Deutscher Chemiker (GDCh) @gdch.de · Jun 3

GDCh unterzeichnet die Stockholm Declaration on Chemistry for the Future: gdch.app/article/gdch...

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Katja Heinze's research group University of Mainz @labheinze.bsky.social · Jun 4

Long-lived #excited states with non-precious transition metals? Check Alexandra’s paper on a polypyridine #vanadium complex. #luminescence and #photocatalysis in #water published in @jacs.acspublications.org
pubs.acs.org/doi/10.1021/jacs.5c04471 #ChemSky

A Near-Infrared-II Luminescent and Photoactive Vanadium(II) Complex with a 760 ns Excited State Lifetime

Ruthenium and iridium are key components in the most important applications of photoactive complexes, namely, light-emitting devices, photocatalysis, bioimaging, biosensing, and photodynamic therapy. ...

pubs.acs.org

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Reposted by Katja Heinze's research group University of Mainz

ChemComm @chemcomm.rsc.org · Jun 4

New Hot article from @ckerzig.bsky.social, @gloriusfrank.bsky.social and colleagues:

'Pushing the limit of triplet–triplet annihilation photon upconversion towards the UVC range' 🔥

#OpenAccess 🔓

Pushing the limit of triplet–triplet annihilation photon upconversion towards the UVC range

Triplet–triplet annihilation photon upconversion (TTA-UC) provides a milder alternative to traditional UVB/UVC photochemistry. However, suitable sensitizer-annihilator pairs are scarce, in particular…

buff.ly

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