1,721,175 research outputs found
Phthalocyanines as materials for advanced technologies: some examples
No full textMetallophthalocyanine complexes and related compounds play an important role in many advanced applications and modem technologies mostly by virtue of their characteristic optical absorption and high chemical stability. As a class of materials made well-known by their vivid and fast colors, it is expected that metallophthalocyanines and analogues, e.g. naphthalocyanines, are going to keep their role with the increasing use of natural and artificial light in the technologies of the future. In the present review some relevant properties of phthalocyanines and related macrocycles for technological applications are analyzed. In particular the electrical conductivity and photoconductivity as well as some nonlinear optical properties (mostly optical limiting), of phthalocyanines and related compounds are discussed. Copyright (c) 2004 Society of Porphyrins & Phthalocyanines
Color chemistry, 3rd rev. ed.
No full textReview of the book of Heinrich Zollinger "Color Chemistry", 3rd Ed., published by Wiley-VCH in 2003 (ISBN: 3-906390-23-3
International Conference on Porphyrins and Phthalocyanines
No full textSimposio sul tema MATERIALS BASED PYRROLIC MACROCYCLE
International Conference on Porphyrins and Phthalocyanines
No full textOrganizzazione del Simposio intitolato "Phthalocyanine based materials
Stacked polymeric phthalocyanines : synthesis and structure related properties
No full textCHAPTER ORGANIZATION
1,2-Synthesis of stacked Pc polymers
a) Nonbridged stacked poly-Pcs
b) Bridged stacked poly-Pcs
3-Properties of bridged Pc
Porphyrins, phthalocyanines and related compounds as materials for optical limiting
No full textIn the present work the nonlinear optical properties, namely optical limiting (OL), of metal complexes based on tetrapyrrolic macrocycles as doinors are reviewed. The description of the OL properties of more than one hundred complexes among porphyrins, phthalocyanines and naphthalocyanines dispersed either in a liquid or in a self-standing matrix has been carried out. In particular, the influence of all relevant structural factors on the OL effect has been systematically analysed
Perfluorinated phthalocyanines for optical limiting: Evidence for the direct correlation between substituent electron withdrawing character and the nonlinear optical effect
No full textA study was conducted on the optical limiting effect of the hexadecafluorophthalocyanines F 16PcTiO(1), F 16PcVO(2), F 16PcZr(OH) 2(3), and F 16PcInCl(4) and compared with the optical limiting effect produced by analogous systems bearing different kinds of substituents. It was found that the presence of electron-withdrawing substituents, namely fluoro, in the phthalocyanine brings about a noticeable improvement of the optical limiting effect in these systems. Such an improvement was attributed to the augmentation of the transition dipole moment associated with the excited states involved in the electronic transition responsible for the optical limiting effect
GENERATION AND TRAPPING OF AN ALKYNYL CATION
No full textp-(TC≡C)2C6H4 was prepd. and allowed to decay in the presence of aprotic nucleophiles such as C6H6, Br(CH2)4Br and Me3CBr. The products formed offer the 1st evidence for the generation of an alkynyl cation
Physical properties of phthalocyanine based materials
No full textCHAPTER ORGANIZATION
1,2-Definitions of physical properties of Pcs
3- Structural features
a) Molecular geometries
b) Spatial arrangements of molecules
4-Electronic structure of Pcs
a) Electrons in p-type orbitals of gaseous species
b) Electrons in low lying energy states of gaseous species
c) Electronic structure in solid Pcs
5-Optical absorption of Pcs
6-Electrical conduction in Pcs
7-Photoconduction in Pcs
8-Nonlinear optical (NLO) properties
a) Introduction
b) Optical limiting (OL)
c) Pcs for OL
d) NLO of crystal
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