Molecular structure reorganisation of Fe-, Co- and Ni-phthalocyanines upon milling

Adriyan S. Milev; Kamali Kannangara; Nguyen H. Tran; Michael A. Wilson

Molecular structure reorganisation of Fe-, Co- and Ni-phthalocyanines upon milling

Adriyan S. Milev, Kamali Kannangara, Nguyen H. Tran, Michael A. Wilson

School of Science

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4 Citations (Scopus)

Abstract

A method for preparation of carbon nanotubes with relatively low concentration of defects requires milling and subsequent pyrolysis of metal-phthalocyanines (MPc, MC32H16N8). The molecular structure rearrangements in Fe-, Ni- and Co-phthalocyanines precursors upon milling in argon for 100 h have been investigated using shortÃƒÂ¢Ã¢"šÂ¬Ã¢â‚¬Å“range spectroscopic methods. Carbon K-edge near edge X-ray absorption fine structure (NEXAFS) spectra, acquired in bulk sensitive fluorescence-yield mode, show that packing order of the metal phthalocyanines has changed during the milling. The new packing shows similar order for the pyrrole subunits of the phthalocyanine macromolecule but less for the phenyl subunits. The increased energy potential due to loose packing of the milled phthalocyanines can explain the observed substantial reduction in the vaporisation temperature of the milled phthalocyanines.

Original language	English
Number of pages	7
Journal	International Journal of Nanotechnology
Publication status	Published - 2007

Keywords

carbon nanotube synthesis
molecular structure
nanotechnology
pyrolysis

Cite this

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title = "Molecular structure reorganisation of Fe-, Co- and Ni-phthalocyanines upon milling",

abstract = "A method for preparation of carbon nanotubes with relatively low concentration of defects requires milling and subsequent pyrolysis of metal-phthalocyanines (MPc, MC32H16N8). The molecular structure rearrangements in Fe-, Ni- and Co-phthalocyanines precursors upon milling in argon for 100 h have been investigated using short{\~A}ƒ{\^A}¢{\~A}¢{"}{\v s}{\^A}¬{\~A}¢{\^a}‚¬{\AA}“range spectroscopic methods. Carbon K-edge near edge X-ray absorption fine structure (NEXAFS) spectra, acquired in bulk sensitive fluorescence-yield mode, show that packing order of the metal phthalocyanines has changed during the milling. The new packing shows similar order for the pyrrole subunits of the phthalocyanine macromolecule but less for the phenyl subunits. The increased energy potential due to loose packing of the milled phthalocyanines can explain the observed substantial reduction in the vaporisation temperature of the milled phthalocyanines.",

keywords = "carbon nanotube synthesis, molecular structure, nanotechnology, pyrolysis",

author = "Milev, {Adriyan S.} and Kamali Kannangara and Tran, {Nguyen H.} and Wilson, {Michael A.}",

year = "2007",

language = "English",

journal = "International Journal of Nanotechnology",

issn = "1475-7435",

publisher = "Inderscience Enterprises Ltd",

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TY - JOUR

T1 - Molecular structure reorganisation of Fe-, Co- and Ni-phthalocyanines upon milling

AU - Milev, Adriyan S.

AU - Kannangara, Kamali

AU - Tran, Nguyen H.

AU - Wilson, Michael A.

PY - 2007

Y1 - 2007

N2 - A method for preparation of carbon nanotubes with relatively low concentration of defects requires milling and subsequent pyrolysis of metal-phthalocyanines (MPc, MC32H16N8). The molecular structure rearrangements in Fe-, Ni- and Co-phthalocyanines precursors upon milling in argon for 100 h have been investigated using shortÃƒÂ¢Ã¢"šÂ¬Ã¢â‚¬Å“range spectroscopic methods. Carbon K-edge near edge X-ray absorption fine structure (NEXAFS) spectra, acquired in bulk sensitive fluorescence-yield mode, show that packing order of the metal phthalocyanines has changed during the milling. The new packing shows similar order for the pyrrole subunits of the phthalocyanine macromolecule but less for the phenyl subunits. The increased energy potential due to loose packing of the milled phthalocyanines can explain the observed substantial reduction in the vaporisation temperature of the milled phthalocyanines.

AB - A method for preparation of carbon nanotubes with relatively low concentration of defects requires milling and subsequent pyrolysis of metal-phthalocyanines (MPc, MC32H16N8). The molecular structure rearrangements in Fe-, Ni- and Co-phthalocyanines precursors upon milling in argon for 100 h have been investigated using shortÃƒÂ¢Ã¢"šÂ¬Ã¢â‚¬Å“range spectroscopic methods. Carbon K-edge near edge X-ray absorption fine structure (NEXAFS) spectra, acquired in bulk sensitive fluorescence-yield mode, show that packing order of the metal phthalocyanines has changed during the milling. The new packing shows similar order for the pyrrole subunits of the phthalocyanine macromolecule but less for the phenyl subunits. The increased energy potential due to loose packing of the milled phthalocyanines can explain the observed substantial reduction in the vaporisation temperature of the milled phthalocyanines.

KW - carbon nanotube synthesis

KW - molecular structure

KW - nanotechnology

KW - pyrolysis

UR - http://handle.uws.edu.au:8081/1959.7/35018

M3 - Article

SN - 1475-7435

JO - International Journal of Nanotechnology

JF - International Journal of Nanotechnology

ER -

Molecular structure reorganisation of Fe-, Co- and Ni-phthalocyanines upon milling

Abstract

Keywords

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