Step-by-step self-assembled hybrids that feature control over energy and charge transfer

Grimm B, Schornbaum J, Jasch H, Trukhina O, Wessendorf F, Hirsch A, Torres T, Guldi DM (2012)

Publication Type: Journal article, Original article

Publication year: 2012

Journal

Original Authors: Grimm B., Schornbaum J., Jasch H., Trukhina O., Wessendorf F., Hirsch A., Torres T., Guldi D.M.

Publisher: National Academy of Sciences

Book Volume: 109

Pages Range: 15565-15571

Journal Issue: 39

DOI: 10.1073/pnas.1113753109

Abstract

In the current work, we have documented the use of two complementary supramolecular motifs, namely multipoint hydrogen bonding and metal complexation, as a means to control the step-by- step assembly of a panchromatically absorbing and highly versatile solar energy conversion system. On one hand, two different perylenediimides (1a/1b) have been integrated together with a metalloporphyrin (2) by means of the Hamilton receptor/cyanuric acid hydrogen bonding motif into energy transduction systems 1a•2 or 1b•2. Steady-state and time-resolved measurements corroborated that upon selective photoexcitation of the perylenediimides (1a/1b), an energy transfer evolved from the singlet excited state of the perylenediimides (1a/1b) to that of the metalloporphyrin (2). On the other hand, fullerene (3) and metalloporphyrin (2) form the electron donor-acceptor system 2•3 via axial complexation. Photophysical measurements confirm that an electron transfer prevails from the singlet excited state of 2 to the elec-tron- accepting 3. The correspondingly formed radical ion pair state decays with a lifetime of 1.0 ± 0.1 ns. As a complement to the aforementioned, the energy transduction features of 1a•2 were combined with the electron donor-acceptor characteristics of 2•3 to afford 1a•2•3. To this end, time-resolved measurements reveal that the initially occurring energy-transfer interaction (53 ± 3 ps) between 1a/1b and 2 is followed by an electron transfer (12 ± 1 ps) from 2 to 3. From multiwavelength analyses, the lifetime of the radical ion pair state in 1a•2•3 - as a product of a cascade of light-induced energy and electron transfer - was derived as 3.8 ± 0.2 ns.

Authors with CRIS profile

Additional Organisation(s)

Involved external institutions

Universidad Autónoma de Madrid (UAM) Spain (ES)

How to cite

APA:

Grimm, B., Schornbaum, J., Jasch, H., Trukhina, O., Wessendorf, F., Hirsch, A.,... Guldi, D.M. (2012). Step-by-step self-assembled hybrids that feature control over energy and charge transfer. Proceedings of the National Academy of Sciences of the United States of America, 109(39), 15565-15571. https://dx.doi.org/10.1073/pnas.1113753109

MLA:

Grimm, Bruno, et al. "Step-by-step self-assembled hybrids that feature control over energy and charge transfer." Proceedings of the National Academy of Sciences of the United States of America 109.39 (2012): 15565-15571.

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