Immobilizing NIR absorbing azulenocyanines onto single wall carbon nanotubes - From charge transfer to photovoltaics

Ince M, Bartelmeß J, Kießling D, Dirian K, Victoria Martinez-Diaz M, Torres T, Guldi DM (2012)

Publication Type: Journal article, Original article

Publication year: 2012

Journal

Original Authors: Ince M., Bartelmess, Kiessling D., Dirian K., Martinez-Diaz M.V., Torres T., Guldi D.M.

Publisher: Royal Society of Chemistry

Book Volume: 3

Pages Range: 1472-1480

Journal Issue: 5

DOI: 10.1039/c2sc20071f

Abstract

In this fundamental study, the supramolecular interactions between SWNTs and either symmetrical Zn(ii) octa-tert-butylazulenocyanine 1 or a Zn(ii) azulenocyanine-phthalocyanine 2 bearing a pyrene unit have been evaluated. The synthetic protocol allowed for the preparation of unsymmetrical azulenocyanine-phthalocyanine molecules, which incorporate reactive hydroxyl functional groups useful for the preparation of more elaborate derivatives, that is, the pyrene containing derivative 2 by an esterification reaction. To shed light onto the mutual interactions between 1 or 2 and SWNT, stable suspensions of SWNT in a mixture of 25% THF and 75% DMF were titrated with variable amounts of 1 or 2. These assays indicate a successful immobilization of azulenocyanine derivatives 1 or 2 onto SWNTs to yield the supramolecular hybrids SWNT/1 and SWNT/2. In this light, the physico-chemical properties of 1 and 2 as well as those of SWNT/1 and SWNT/2 were investigated. From these we conclude strong interactions in the ground state, and a rapid charge separation in the excited state of SWNT/1 or SWNT/2. The accordingly formed radical ion pair states decay with lifetimes of 124 and 137 ps for SWNT/1 and SWNT/2, respectively. Finally, SWNT/1 and SWNT/2 were integrated into photoelectrochemical cells, revealing a response throughout the visible and near-infrared with a moderate IPCE maxima of 2.5%. © 2012 The Royal Society of Chemistry.

Authors with CRIS profile

Involved external institutions

Universidad Autónoma de Madrid (UAM) Spain (ES)

How to cite

APA:

Ince, M., Bartelmeß, J., Kießling, D., Dirian, K., Victoria Martinez-Diaz, M., Torres, T., & Guldi, D.M. (2012). Immobilizing NIR absorbing azulenocyanines onto single wall carbon nanotubes - From charge transfer to photovoltaics. Chemical Science, 3(5), 1472-1480. https://doi.org/10.1039/c2sc20071f

MLA:

Ince, Mine, et al. "Immobilizing NIR absorbing azulenocyanines onto single wall carbon nanotubes - From charge transfer to photovoltaics." Chemical Science 3.5 (2012): 1472-1480.

BibTeX: Download