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Title: Formation of ordered films of axially bridged aluminum phthalocyanine [(tBu){sub 4}PcAl]{sub 2}O via magnetic field-induced reaction

Abstract

The μ-(oxo)bis[tetra-tert-butylphthalocyaninato] aluminum(III) [(tBu){sub 4}PcAl]{sub 2}O films with the crystallites oriented preferably in one direction were obtained via chemical transformation of tetra-tert-butylsubstituted chloroaluminum(III) phthalocyanine (tBu){sub 4}PcAlCl film upon its annealing in magnetic field. A comparative analysis of the influence of post-deposition annealing process without and under applied magnetic field of 1 T, on the orientation and morphology of (tBu){sub 4}PcAlCl and [(tBu){sub 4}PcAl]{sub 2}O films, has been carried out by the methods of UV-vis, Infrared and Raman spectroscopies, XRD as well as atomic force microscopy. The formation of [(tBu){sub 4}PcAl]{sub 2}O films with elongated crystallites having preferential orientation was observed upon heating of the films in magnetic field while annealing without magnetic field under the same conditions does not demonstrate any effect on the structure and morphology of these films. The reasons of the sensitivity of this reaction to the presence of such magnetic field is discussed and studied by electronic paramagnetic resonance spectroscopy.

Authors:
; ;  [1]; ;  [2]; ;  [3]
  1. Nikolaev Institute of Inorganic Chemistry, Russian Academy of Sciences, Lavrentiev Pr., 3, 630090 Novosibirsk (Russian Federation)
  2. Institute for Physical and Theoretical Chemistry, Auf der Morgenstelle 18, 72076 Tübingen (Germany)
  3. Materials and Engineering Research Institute, Sheffield Hallam University, Sheffield S1 1WB (United Kingdom)
Publication Date:
OSTI Identifier:
22251329
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 139; Journal Issue: 20; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALUMINIUM; ANNEALING; ATOMIC FORCE MICROSCOPY; DEPOSITION; FILMS; MAGNETIC FIELDS; PARAMAGNETISM; PHTHALOCYANINES; RAMAN SPECTROSCOPY; RESONANCE; SENSITIVITY; X-RAY DIFFRACTION

Citation Formats

Basova, Tamara, E-mail: basova@niic.nsc.ru, Berezin, Aleksei, Nadolinny, Vladimir, Peisert, Heiko, Chassé, Thomas, Banimuslem, Hikmat, and Hassan, Aseel. Formation of ordered films of axially bridged aluminum phthalocyanine [(tBu){sub 4}PcAl]{sub 2}O via magnetic field-induced reaction. United States: N. p., 2013. Web. doi:10.1063/1.4832875.
Basova, Tamara, E-mail: basova@niic.nsc.ru, Berezin, Aleksei, Nadolinny, Vladimir, Peisert, Heiko, Chassé, Thomas, Banimuslem, Hikmat, & Hassan, Aseel. Formation of ordered films of axially bridged aluminum phthalocyanine [(tBu){sub 4}PcAl]{sub 2}O via magnetic field-induced reaction. United States. doi:10.1063/1.4832875.
Basova, Tamara, E-mail: basova@niic.nsc.ru, Berezin, Aleksei, Nadolinny, Vladimir, Peisert, Heiko, Chassé, Thomas, Banimuslem, Hikmat, and Hassan, Aseel. 2013. "Formation of ordered films of axially bridged aluminum phthalocyanine [(tBu){sub 4}PcAl]{sub 2}O via magnetic field-induced reaction". United States. doi:10.1063/1.4832875.
@article{osti_22251329,
title = {Formation of ordered films of axially bridged aluminum phthalocyanine [(tBu){sub 4}PcAl]{sub 2}O via magnetic field-induced reaction},
author = {Basova, Tamara, E-mail: basova@niic.nsc.ru and Berezin, Aleksei and Nadolinny, Vladimir and Peisert, Heiko and Chassé, Thomas and Banimuslem, Hikmat and Hassan, Aseel},
abstractNote = {The μ-(oxo)bis[tetra-tert-butylphthalocyaninato] aluminum(III) [(tBu){sub 4}PcAl]{sub 2}O films with the crystallites oriented preferably in one direction were obtained via chemical transformation of tetra-tert-butylsubstituted chloroaluminum(III) phthalocyanine (tBu){sub 4}PcAlCl film upon its annealing in magnetic field. A comparative analysis of the influence of post-deposition annealing process without and under applied magnetic field of 1 T, on the orientation and morphology of (tBu){sub 4}PcAlCl and [(tBu){sub 4}PcAl]{sub 2}O films, has been carried out by the methods of UV-vis, Infrared and Raman spectroscopies, XRD as well as atomic force microscopy. The formation of [(tBu){sub 4}PcAl]{sub 2}O films with elongated crystallites having preferential orientation was observed upon heating of the films in magnetic field while annealing without magnetic field under the same conditions does not demonstrate any effect on the structure and morphology of these films. The reasons of the sensitivity of this reaction to the presence of such magnetic field is discussed and studied by electronic paramagnetic resonance spectroscopy.},
doi = {10.1063/1.4832875},
journal = {Journal of Chemical Physics},
number = 20,
volume = 139,
place = {United States},
year = 2013,
month =
}
  • Laser-induced hole filling and spectral diffusion for the dye aluminum phthalocyanine tetrasulfonate in hyperquenched glassy films of water, ethanol, and methanol are investigated. Burning multiple holes into these films reveals a dependence on the burn direction, which is explained by the asymmetry of the antihole produced in the burning process. Spectral diffusion rates are shown to be dependent on sample annealing at temperatures well below the glass transition temperature, T{sub g}. This is interpreted in terms of a {beta}-relaxation process of the glass and is identified with transport of free volume. {copyright} {ital 1999 American Institute of Physics.}
  • The relaxation kinetics of aluminum(III), silicon(IV), and metal-free phthalocyanine (PcH/sub 2/) have been investigated by both conventional and laser flash photolysis. The observed excited-state decay kinetics are shown to be controlled by the excited-state concentration, the nature of the solvent, and the presence of an external magnetic field. Triplet-triplet annihilation is shown to be a dominating factor in the excited-state scheme. The second-order deviations observed in the relaxation kinetics of the phthalocyanines under various conditions are discussed in terms of an excimer-((/sup 3/E/sub u/)Pc* + (/sup 3/E/sub u/)Pc* ..-->.. (/sup 1/A/sub 1g/) (Pc-Pc)*) mediated mechanism. 34 references, 5 figures, 2more » tables.« less
  • The paramagnetic rhodium phthalocyanine complex (RPc)(PMe{sub 3}){sub 2}Rh (4) (RPc = dianion of 1,4,8,11,15,18,22,25-octa-n-pentylphthalocyanine) has been prepared by the reaction of trimethylphosphine (PMe{sub 3}) with hydride-bridged and nonbridged rhodium phthalocyanine dimers. The reaction of the {mu}-hydrido complex (RPcH)Rh({mu}-H)Rh(RPc) (5) (RPcH = RPc with one of its meso nitrogens protonated) with PMe{sub 3} at {minus}10 C produces (RPc)(PMe{sub 3})RhH (6), which further reacts with PMe{sub 3} to produce 4 and H{sub 2} at higher temperatures. If the solution of 6 is allowed to warm in the absence of free PMe{sub 3}, H{sub 2} is also liberated and 6 is converted tomore » an equal number of moles of 4 and [(RPc)Rh]{sub 2}(PMe{sub 3}) (7). In contrast, the reaction of 5 with pyridine (py) produces (RPc)(py)-RhH (11), which does not react with additional pyridine. Alternatively, 4 is generated by the reaction of the Rh-Rh bonded dimer [(RPc)Rh]{sub 2} (1) with PMe{sub 3}. In this reaction, the formation of 7 as an intermediate may be shown by the titration of 1 with PMe{sub 3}. Complex 1 reacts with 4 to produce (RPc)Rh{sup {minus}} (10) and (RPc)(PMe{sub 3}){sub 2}-Rh{sup +} (9). A redox exchange between 4 and 9 ensues. The cobalt analogue of 4, i.e., (RPc)(PMe{sub 3}){sub 2}Co (12), was generated reversibly by the reaction of (RPc)Co (13) with PMe{sub 3} at low temperatures. The {sup 1}H NMR and the ESR spectra of 4, 12, and 13 indicate that while 13 is a metal-centered radical, 4 and 12 are best described as ligand-centered radicals.« less