Autoren:	Rocker, Johannes Dresel, Johannes A. Krieger, Leonie A. Eckhardt, Paul Ortuño, Ana M. Kitzmann, Winald R. Clever, Guido H. Heinze, Katja Opatz, Till
Titel:	Substitution effects on the photophysical and photoredox properties of tetraaza[7]helicenes
Online-Publikationsdatum:	12-Sep-2023
Erscheinungsdatum:	2023
Sprache des Dokuments:	Englisch
Zusammenfassung/Abstract:	A series of substituted derivatives of tetraaza[7]helicenes were synthesized and the influence of the substitution on their photophysical and photoredox-catalytic properties was studied. The combination of their high fluorescence quantum yields of up to 0.65 and their circularly polarized luminescence (CPL) activity results in CPL brightness values (BCPL) that are among the highest recorded for [7]helicenes so far. A sulfonylation/hetarylation reaction using cyanopyridines as substrates for photoinduced electron transfer (PET) from the excited helicenes was conducted to test for viability in photoredox catalysis. DFT calculations predict the introduction of electron withdrawing substituents to yield more oxidizing catalysts.
DDC-Sachgruppe:	540 Chemie 540 Chemistry and allied sciences
Veröffentlichende Institution:	Johannes Gutenberg-Universität Mainz
Organisationseinheit:	FB 09 Chemie, Pharmazie u. Geowissensch.
Veröffentlichungsort:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-9522
Version:	Published version
Publikationstyp:	Zeitschriftenaufsatz
Nutzungsrechte:	CC BY
Informationen zu den Nutzungsrechten:	https://creativecommons.org/licenses/by/4.0/
Zeitschrift:	Chemistry - a European journal 29 48
Seitenzahl oder Artikelnummer:	e202301244
Verlag:	Wiley-VCH
Verlagsort:	Weinheim
Erscheinungsdatum:	2023
ISSN:	1521-3765
DOI der Originalveröffentlichung:	10.1002/chem.202301244
Enthalten in den Sammlungen:	DFG-491381577-H