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

Dirian K, Bauroth S, Roth AM, Syrgiannis Z, Rigodanza F, Burian M, Amenitsch H, Sharapa D, Prato M, Clark T, Guldi DM (2018)

Publication Status: Published

Publication Type: Journal article

Publication year: 2018

Journal

Nanoscale Royal Society of Chemistry

Publisher: ROYAL SOC CHEMISTRY

Book Volume: 10

Pages Range: 2317-2326

Journal Issue: 5

DOI: 10.1039/c7nr07870f

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.

Authors with CRIS profile

Konstantin Dirian Lehrstuhl für Physikalische Chemie I Stefan Bauroth Lehrstuhl für Physikalische Chemie I Alexandra Marina Roth Sonderforschungsbereich 953/3 Synthetische Kohlenstoffallotrope Dmytro Sharapa Computer-Chemie-Centrum Timothy Clark Computer-Chemie-Centrum Dirk Michael Guldi Lehrstuhl für Physikalische Chemie I

Involved external institutions

Università degli Studi di Trieste IT Italy (IT) Technische Universität Graz AT Austria (AT)

How to cite

APA:

Dirian, K., Bauroth, S., Roth, A.M., 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://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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