Some new developments in the chemistry of metallophthalocyanines

Kasuga, Kuninobu

doi:10.1016/s0010-8545(00)80370-7

Cited by 207 publications

(60 citation statements)

References 62 publications

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“…Fraction 4 has one pair of reversible oxidation and three irreversible reduction waves. The reduction and oxidation of metal phthalocyanine derivatives are due to the interaction between the phthalocyanine ring and the central metal [32,33].…”

Section: Separation and Characterisation Of Position Isomersmentioning

confidence: 99%

Position isomer separation of non-peripheral substituted zinc dibenzo-di(3,4-pyrido)porphyrazines

Sakamoto

Kato

Cook

2001

J. Porphyrins Phthalocyanines

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ABSTRACT:The cyclotetramerisation products from the 1, 8-diazabicyclo[5,4,0]undec-7-ene catalysed reaction of a 1:1 mol mixture of 3,6-didecylphthalonitrile and 3,4-dicynopyridine in the presence of zinc chloride have been isolated by chromatography. The fractions comprise zinc octadecylphthalocyanine and compounds in which one, two, three and four pyridinoid rings replace the didecylbenzenoid moiety. The zinc bis(1,4-didecylbenzo)bis(3,4-pyrido)porphyrazine fraction was separated further into four sub-fractions and the components have been characterised by 400 MHz proton nuclear magnetic resonance spectroscopy, visible region spectroscopy, fluorescence spectroscopy and by cyclic voltammetry.

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Section: Separation and Characterisation Of Position Isomersmentioning

confidence: 99%

Position isomer separation of non-peripheral substituted zinc dibenzo-di(3,4-pyrido)porphyrazines

Sakamoto

Kato

Cook

2001

J. Porphyrins Phthalocyanines

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“…Pc absorbs in the visible region, has high thermal and chemical stability depending on the chemical and crystalline form of the material and exhibits several electric and photoelectric properties: semiconductivity, photoconductivity, photochemistry reactivity, photosynthetic activity and luminescence. 2 Particularly relevant to applications is the film-forming ability of Pc, using methods such as Langmuir-Blodgett (LB), 3,4 self-assembly, 5,6 vacuum sublimation 7 and casting. 8 Pcs have also attracted particular interest in non-linear optics and optical data storage.…”

Section: Introductionmentioning

confidence: 99%

Vibrational spectra and surface‐enhanced resonance Raman scattering of palladium phthalocyanine evaporated films

Gaffo¹,

Constantino²,

Moreira³

et al. 2002

J Raman Spectroscopy

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The vibrational spectra of palladium phthalocyanine (PdPc) evaporated thin solid films are reported, including the resonance Raman scattering, surface-enhanced resonance Raman scattering (SERRS) and SERRS mapping of the film surface using micro-Raman spectroscopy with 633 nm laser radiation. SERRS of PdPc was obtained by evaporating an overlayer of Ag nanoparticles on to the PdPc film on glass. The SERRS enhancement factor is estimated as ∼10 4 with reference to PdPc evaporated films on glass. The molecular organization of the PdPc evaporated films was probed using transmission and reflection-absorption infrared spectra. It was established that a random molecular distribution found in PdPc evaporated films is independent of temperature. No evidence of thermal degradation due to thermal annealing was found in the films. Electronic absorption and emission spectra are also discussed.

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“…The phthalocyanines are a class of planar aromatic organic compounds that have attracted a great deal of attention for quite some time because of their unique properties such as semiconductivity, photoconductivity, photochemical reactivity, chemical stability, electrochromism, bio-organic and catalytic activity and their applications in the field of colour display technology and gas sensors [1][2][3]. Since the discovery of Pc-s in 1907 a great deal of effort has been made to study the optical properties of Pc-s and associated compounds.…”

Section: Introductionmentioning

confidence: 99%

Optical absorption and emission spectral studies of phthalocyanine molecules in DMF

Kumar

Thomas

Unnikrishnan

et al. 2001

J. Porphyrins Phthalocyanines

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Optical absorption and emission spectral studies of various phthalocyanine (Pc) molecules in dimethyl formamide (DMF) solvent are reported in this paper. Measurements have been done for free base, Eu, Fe, Mn, Sm, Cu, Zn, Nd and La Pc-s. The principal optical transitions viz B and Q are identified and some of the important spectral parameters such as molar extinction coefficient (e), absorption cross section ( a ), dipole strength (q) and oscillator strength (f) are evaluated for the prominent Q-band. The measured radiative parameters viz emission cross section ( e ), fluorescence bandwidth (D) and optical gain (G) show wide variation among different systems. The results obtained are compared with other solid matrices such as glass and polymer.

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Some new developments in the chemistry of metallophthalocyanines

Cited by 207 publications

References 62 publications

Position isomer separation of non-peripheral substituted zinc dibenzo-di(3,4-pyrido)porphyrazines

Position isomer separation of non-peripheral substituted zinc dibenzo-di(3,4-pyrido)porphyrazines

Vibrational spectra and surface‐enhanced resonance Raman scattering of palladium phthalocyanine evaporated films

Optical absorption and emission spectral studies of phthalocyanine molecules in DMF

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