A water-soluble, bay-functionalized perylenediimide derivative - correlating aggregation and excited state dynamics

Journal article


Publication Details

Author(s): Dirian K, Bauroth S, Roth A, Syrgiannis Z, Rigodanza F, Burian M, Amenitsch H, Sharapa D, Prato M, Clark T, Guldi DM
Journal: Nanoscale
Publisher: ROYAL SOC CHEMISTRY
Publication year: 2018
Volume: 10
Journal issue: 5
Pages range: 2317-2326
ISSN: 2040-3364


Abstract

The aggregation and the photophysics of a water soluble perylenediimide (PDI) derivative that features two bromine substituents in the bay positions has been probed. Non-fluorescent aggregates were found to be present at concentrations of 1.0 x 10(-5) M. In situ small-angle X-ray scattering (SAXS) measurements and complementary molecular modeling showed the presence of PDI aggregates. In their singlet excited states, the PDI aggregates are characterized by distinct transient fingerprints and rapid deactivation, as revealed by pump-probe experiments on the femto-, pico-, nano-, and microsecond timescales. The product of this deactivation is a PDI triplet excited state. The efficiency of the triplet formation depends on the concentration, and hence on the degree of aggregation. Notably, for PDI concentrations in the range of the critical micelle concentration, the efficiency of intersystem crossing is close to zero. In short, we have demonstrated, for the first time, aggregation-induced formation of triplet excited states for PDI derivatives.


FAU Authors / FAU Editors

Bauroth, Stefan
Lehrstuhl für Physikalische Chemie I
Clark, Timothy apl. Prof. Dr.
Computer-Chemie-Centrum
Dirian, Konstantin
Lehrstuhl für Physikalische Chemie I
Guldi, Dirk Michael Prof. Dr.
Lehrstuhl für Physikalische Chemie I
Roth, Alexandra Marina
Sonderforschungsbereich 953/2 Synthetische Kohlenstoffallotrope
Sharapa, Dmitry
Computer-Chemie-Centrum


External institutions with authors

Technische Universität Graz
Università degli Studi di Trieste


How to cite

APA:
Dirian, K., Bauroth, S., Roth, A., Syrgiannis, Z., Rigodanza, F., Burian, M.,... Guldi, D.M. (2018). A water-soluble, bay-functionalized perylenediimide derivative - correlating aggregation and excited state dynamics. Nanoscale, 10(5), 2317-2326. https://dx.doi.org/10.1039/c7nr07870f

MLA:
Dirian, Konstantin, et al. "A water-soluble, bay-functionalized perylenediimide derivative - correlating aggregation and excited state dynamics." Nanoscale 10.5 (2018): 2317-2326.

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Last updated on 2018-19-12 at 16:23

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