Low-Dimensional Carbon Allotropes: Ground- and Excited-State Charge Transfer with NIR-Absorbing Heptamethine Cyanine

Roth AM, Schierl C, Ferrer-Ruiz A, Minameyer M, Rodriguez-Perez L, Villegas C, Angeles Herranz M, Martin N, Guldi DM (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Book Volume: 3

Pages Range: 164-173

Journal Issue: 1

DOI: 10.1016/j.chempr.2017.05.003

Abstract

At the focal point of our studies are mutual interactions between an anionic heptamethine cyanine and individualized single-walled carbon nanotubes (SWCNTs) or exfoliated nanographene (NG). Here, we report the distinct near-infrared absorption of the heptamethine cyanine, which assists in visualizing the electronic interactions in the ground state with ease and precision. In statistical Raman assays, we conclude from downshifted 2D- and G-modes for SWCNTs, as well as upshifted 2D- and downshifted G-modes for NG, that these electronic interactions result in stable n-doping of SWCNTs and NG. Key to this shift of charge density is the electron-donating character of the heptamethine cyanine. In the excited state, a complete but metastable transfer of charges is accompanied by a radical-ion-pair state that lives for several nanoseconds. Such a time domain has not yet been realized, for example, in NG to date.

Authors with CRIS profile

Involved external institutions

Universidad Complutense de Madrid (UCM) Spain (ES)

How to cite

APA:

Roth, A.M., Schierl, C., Ferrer-Ruiz, A., Minameyer, M., Rodriguez-Perez, L., Villegas, C.,... Guldi, D.M. (2017). Low-Dimensional Carbon Allotropes: Ground- and Excited-State Charge Transfer with NIR-Absorbing Heptamethine Cyanine. Chem, 3(1), 164-173. https://doi.org/10.1016/j.chempr.2017.05.003

MLA:

Roth, Alexandra Marina, et al. "Low-Dimensional Carbon Allotropes: Ground- and Excited-State Charge Transfer with NIR-Absorbing Heptamethine Cyanine." Chem 3.1 (2017): 164-173.

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