The Photophysics of Dibenzo[a,j]phenazine

The photophysics of dibenzo[a,j]phenazine (DBPHZ) in solution was investigated by steady‐state and time‐resolved spectroscopy. The nature of the solvent (methanol, acetonitrile, dichloromethane and cyclohexane were considered) only weakly affects the photophysical properties. The first excited singl...

Full description

Saved in:
Bibliographic Details
Published in:ChemPhotoChem 2021-04, Vol.5 (4), p.335-347
Main Authors: Thom, Kristoffer A., Förster, Tom, Weingart, Oliver, Goto, Shimpei, Takeda, Youhei, Minakata, Satoshi, Gilch, Peter
Format: Article
Language:English
Subjects:
dibenzophenazine
excited states
quantum chemistry
time-resolved spectroscopy
transient absorption
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The photophysics of dibenzo[a,j]phenazine (DBPHZ) in solution was investigated by steady‐state and time‐resolved spectroscopy. The nature of the solvent (methanol, acetonitrile, dichloromethane and cyclohexane were considered) only weakly affects the photophysical properties. The first excited singlet state features a lifetime of the order of 1 ns. Its fluorescence emission is centered around 420 nm and occurs with moderate yields of ≈0.1. The lowest triplet state is populated with yields of ≈0.3. Quantum chemical computations suggest that a 3nπ* state energetically close to the primarily excited singlet state is responsible for the efficient intersystem crossing towards the triplet manifold. Synthesis meets spectroscopy meets quantum chemistry: The photophysics of the N‐heterocyclic azaacence dibenzo[a,j]phenazine (DBPHZ) is investigated. Time‐resolved spectroscopy and quantum chemistry give insights into the processes after photo‐excitation of this promising chromophore.
ISSN:2367-0932
2367-0932
DOI:10.1002/cptc.202000250