NDLI: Immobilizing NIR absorbing azulenocyanines onto single wall carbon nanotubes

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Immobilizing NIR absorbing azulenocyanines onto single wall carbon nanotubes—from charge transfer to photovoltaics

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Back cover

Chemical Science Vol - 3 Issue - 4

Chemical Science Vol - 3 Issue - 3

Chemical Science Vol - 3 Issue - 2

Chemical Science Vol -2

Chemical Science Vol -1

Immobilizing NIR absorbing azulenocyanines onto single wall carbon nanotubes—from charge transfer to photovoltaics

Content Provider	Royal Society of Chemistry (RSC)
Author	Ince, Mine Dirian, Konstantin Bartelmess, Juergen Kiessling, Daniel Guldi, Dirk M. Martínez-Díaz, M. Victoria Torres, Tomás
Copyright Year	2012
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%.
Starting Page	1472
Ending Page	1480
Page Count	9
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	3
Issue Number	5
Journal	Chemical Science
DOI	10.1039/c2sc20071f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Pyrene Ester List of pedophile and pederast advocacy organizations Hydroxy group Ion Photoelectrochemical process
Content Type	Text
Resource Type	Article
Subject	Chemistry

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