NDLI: Peripheral <i>versus</i> axial substituted phthalocyanine-double-walled carbon nanotube hybrids as light harvesting systems

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Journal of Materials Chemistry C Vol - 3 Issue - 29

Journal of Materials Chemistry C Vol - 3 Issue - 19

Journal of Materials Chemistry C Vol - 3 Issue - 9

Journal of Materials Chemistry C Vol - 3 Issue - 8

Journal of Materials Chemistry C Vol - 3 Issue - 7

Journal of Materials Chemistry C Vol - 3 Issue - 6

Journal of Materials Chemistry C Vol - 3 Issue - 5

Journal of Materials Chemistry C Vol -2

Journal of Materials Chemistry C Vol -1

Peripheral versus axial substituted phthalocyanine-double-walled carbon nanotube hybrids as light harvesting systems

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Minfang Barrejón, Myriam Martín-Gomis, Luis Fierro, José Luis G. Gobeze, Habtom B. Sastre-Santos, Ángela Langa, Fernando D'Souza, Francis Gómez-Escalonilla, María J. Iijima, Sumio Arellano, Luis M. Molina, Desiré Yudasaka, Masako
Copyright Year	2015
Abstract	Selective functionalization of the outer walls of double-walled carbon nanotubes (DWCNTs) with zinc and silicon phthalocyanines leaving the inner walls undamaged has been accomplished. The mode of metal phthalocyanine (MPc) connection was varied, that is, through the macrocycle periphery in the case of zinc phthalocyanines (ZnPcs) and through the silicon axial position in the case of silicon phthalocyanines (SiPcs) to visualize its effect on phthalocyanine–DWCNT interactions. Evidence of outer wall functionalization and the degree of phthalocyanine substitution on DWCNTs were arrived from HR-TEM, AFM, TGA, XPS and Raman techniques. The sensitizer-nanotube interactions were probed from studies involving optical absorbance, steady-state and time resolved emission, and electrochemical studies. The fluorescence of phthalocyanines in these hybrids was found to be almost quantitatively quenched (>95%) due to the interactions with DWCNTs, and such interactions were more for the SiPc derived hybrids. The femtosecond transient absorption studies performed revealed that the interactions are dynamic involving the singlet excited phthalocyanines and the nanotubes. In agreement with earlier studies, evidence for charge separation in these hybrids was bleak revealing weak signature bands of MPc˙+ in the 850 nm range. Additionally, the presence of trace amounts of single-walled carbon nanotubes in the hybrids further hampered detailed spectral analysis.
Starting Page	10215
Ending Page	10224
Page Count	10
File Format	HTM / HTML PDF
ISSN	20507526
Volume Number	3
Issue Number	39
Journal	Journal of Materials Chemistry C
DOI	10.1039/c5tc02114f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	SiPc Raman Carbon nanotube Zinc Phthalocyanine Macrocycle Electrochemistry Fluorescence Femtosecond
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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