Substitution-controlled ultrafast excited-state processes in Ru-dppz-derivatives

Physical Chemistry Chemical Physics : PCCP
Christian KuhntJürgen Popp

Abstract

Ru-dppz (dppz = dipyrido[3,2-a:2',3,3'-c]phenazine) complexes play an important role as environmentally sensitive luminescence sensors and building blocks for larger supramolecular compounds. Their photophysical properties are known to be highly sensitive to intermolecular solvent-solute interactions and solvent bulk-properties. Here, the synthesis and characterisation of a novel Ru-dppz derivative is reported. The potential of drastically tuning the photophysical properties of such complexes is exemplified, by introducing very simple structural modifications, namely bromine, into the dppz-ligand scaffold. The photophysics i.e. nature of excited states and the excited-state relaxation pathway of the various complexes has been investigated by means of electrochemical measurements, steady-state emission experiments and femtosecond time-resolved spectroscopy. It could be shown that the location of bromine substitution influences the relative energy between a luminescent and a non-luminescent metal-to-ligand charge-transfer state and therefore quenches or facilitates transitions between both. Hence it is illustrated that the luminescent properties and the underlying ultrafast excited-state dynamics of the complexes can be controlle...Continue Reading

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Citations

Feb 16, 2011·Chemical Communications : Chem Comm·Christian KuhntJürgen Popp
Aug 2, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Holly van der SalmKeith C Gordon
Aug 26, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Julia Meyer-IlseBenjamin Dietzek
Jun 21, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Cüneyt KarakusElisabeth Holder
Oct 9, 2015·Chemistry : a European Journal·Joseph M AslanFrederick M MacDonnell
Jun 18, 2011·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Michael KarnahlJürgen Popp
Mar 17, 2012·Macromolecular Rapid Communications·Ronald SiebertBenjamin Dietzek
Jul 11, 2013·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Maria WächtlerBenjamin Dietzek
Oct 4, 2014·Chemistry : a European Journal·Katharina MonczakSven Rau
Nov 15, 2013·Chemical Communications : Chem Comm·Erin WachterEdith C Glazer
Dec 10, 2020·Chemical Society Reviews·Christine Kranz, Maria Wächtler
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Apr 24, 2021·The Journal of Physical Chemistry Letters·Julian HniopekJürgen Popp
Nov 26, 2010·The Journal of Physical Chemistry. a·Martin PresseltJürgen Popp
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Dec 29, 2020·Inorganic Chemistry·Martin KaufmannMary T Pryce
Jul 6, 2017·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Nicolas QueyriauxMurielle Chavarot-Kerlidou
Nov 5, 2021·The Journal of Physical Chemistry Letters·Runhui LiangDavid Lee Phillips

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