Panchromatic Light Harvesting and Stabilizing Charge-Separated States in Corrole-Phthalocyanine Conjugates through Coordinating a Subphthalocyanine

Berna BB, Platzer B, Wolf M, Lavarda G, Nardis S, Galloni P, Torres T, Guldi DM, Paolesse R (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Chemistry - A European Journal Wiley

DOI: 10.1002/chem.202001442

Abstract

Owing to the electron-donating and -accepting nature of corroles (Corr) and phthalocyanines (Pc), respectively, we designed and developed two novel covalently linked Corr-Pc conjugates. The synthetic route allows the preparation of the target conjugates in satisfying yields. Comprehensive steady-state absorption, fluorescence, and electrochemical assays enabled insights into energy and electron-transfer processes upon photoexcitation. Coordinating a pyridine-appended subphthalocyanine (SubPc) to the Pc of the conjugate sets up the ways and means to realize the first example of an array composed by three different porphyrinoids, which drives a cascade of energy and charge-transfer processes. Importantly, the SubPc assists in stabilizing the charge-separated state, that is, one-electron oxidized Corr and the one electron-reduced Pc, upon photoexcitation by means of a reductive charge transfer to the SubPc. To the best of our knowledge, this is the first case of an intramolecular oxidation of a Corr within electron-donor-acceptor conjugates by means of just photoexcitation. Moreover, the combination of Corr, Pc, and SubPc guarantees panchromatic absorption across the visible range of the solar spectrum, with the SubPc covering the green gap" that usually affects porphyrinoids.

Authors with CRIS profile

Benedikt Platzer Lehrstuhl für Physikalische Chemie I Maximilian Wolf Lehrstuhl für Physikalische Chemie I Dirk Michael Guldi Lehrstuhl für Physikalische Chemie I

Involved external institutions

Università degli Studi di Roma 'Tor Vergata' IT Italy (IT) Universidad Autónoma de Madrid (UAM) ES Spain (ES)

How to cite

APA:

Berna, B.B., Platzer, B., Wolf, M., Lavarda, G., Nardis, S., Galloni, P.,... Paolesse, R. (2020). Panchromatic Light Harvesting and Stabilizing Charge-Separated States in Corrole-Phthalocyanine Conjugates through Coordinating a Subphthalocyanine. Chemistry - A European Journal. https://doi.org/10.1002/chem.202001442

MLA:

Berna, Beatrice Berionni, et al. "Panchromatic Light Harvesting and Stabilizing Charge-Separated States in Corrole-Phthalocyanine Conjugates through Coordinating a Subphthalocyanine." Chemistry - A European Journal (2020).

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