TY  - JOUR
A1  - Verma, Pramod Kumar
A1  - Steinbacher, Andreas
A1  - Schmiedel, Alexander
A1  - Nuernberger, Patrick
A1  - Brixner, Tobias
T1  - Excited-state intramolecular proton transfer of 2-acetylindan-1,3-dione studied by ultrafast absorption and fluorescence spectroscopy
JF  - Structural Dynamics
N2  - We employ transient absorption from the deep-UV to the visible region and fluorescence upconversion to investigate the photoinduced excited-state intramolecular proton-transfer dynamics in a biologically relevant drug molecule, 2-acetylindan-1,3-dione. The molecule is a ß-diketone which in the electronic ground state exists as exocyclic enol with an intramolecular H-bond. Upon electronic excitation at 300 nm, the first excited state of the exocyclic enol is initially populated, followed by ultrafast proton transfer (≈160 fs) to form the vibrationally hot endocyclic enol. Subsequently, solvent-induced vibrational relaxation takes place (≈10 ps) followed by decay (≈390 ps) to the corresponding ground state.
KW  - time resolved spectroscopy
KW  - ground states
KW  - fluorescence spectra
KW  - absorption spectra
KW  - ultraviolet light
KW  - hydrogen bonding
KW  - excited states
KW  - reaction mechanisms
KW  - fluorescence
KW  - solvents
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-181301
VL  - 3
ER  - 
TY  - JOUR
A1  - Matler, Alexander
A1  - Arrowsmith, Merle
A1  - Schorr, Fabian
A1  - Hermann, Alexander
A1  - Hofmann, Alexander
A1  - Lenczyk, Carsten
A1  - Braunschweig, Holger
T1  - Reactivity of Terminal Iron Borylenes and Bis(borylenes) with Carbodiimides: Cycloaddition, Metathesis, Insertion and C−H Activation Pathways
JF  - European Journal of Inorganic Chemistry
N2  - The reactions of carbodiimides with the iron arylborylene complex [Fe=BDur(CO)\(_{3}\)(PMe\(_{3}\))] (Dur=2,3,5,6-Me\(_{4}\)C\(_{6}\)H) and the iron bis(borylene) complex [Fe{=BDur}{=BN(SiMe\(_{3}\))\(_{2}\)}(CO)\(_{3}\)] yield a wide variety of temperature-dependent products, including known FeBNC and novel FeBNB metallacycles, complexes of N-heterocyclic boracarbene and spiro-boracarbene ligands and a unique 1,3,2,4-diazadiborolyl pianostool complex, characterized by NMR spectroscopy and X-ray crystallography. The product distributions can be rationalized by considering sequences of cycloaddition, metathesis, insertion, and C−H activation pathways mainly governed by sterics.
KW  - structure elucidation
KW  - borylene complexes
KW  - cycloaddition
KW  - metathesis
KW  - reaction mechanisms
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-257397
VL  - 2021
IS  - 45
ER  -