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Copper phthalocyanine pigment blue interior fading. Durability evaluation of copper phthalocyanine pigment blue in interior architectural paints

Mazzari R., Dainese U., Marsili G.

Farby i Lakiery

2015

nr 3

3--9

The copper phthalocyanine pigment blue is widely used in architectural coatings. Exterior durability of the pigment has been extensively studied in scientific literature, showing good light and weather fastness. On the other hand, studies on interior durability are scarce. In this work, the interior colour fading of high and low PVC water based paints containing phthalocyanine pigment blue has been investigated. Final results show that this effect has been correlated to the presence of tropospheric ozone. Phthalocyanine pigments might interact with ozone leading to chromophore group breakage and consequent colour fading.

XPS study of air exposed copper phthalocyanine ultra-thin films deposited on Si(111) native substrates

Krzywiecki M., Grządziel L., Ottaviano L., Parisse P., Santucci S., Szuber J.

Materials Science Poland

2008

Vol. 26, No. 2

287--294

Results are presented of XPS characterization of ultra-thin copper phthalocyanine (CuPc) (16 nm- QCM controlled) films thermally deposited under UHV conditions on p- and n- type Si(111) substrates covered by native oxide. Our attempt has been focused on comparative studies of thin films in terms of the stability and durability of CuPc layers after one year of aging in ambient atmosphere. The impact of the type of the substrate doping was also explored. Our results clearly prove that CuPc layers are chemically stable and durable after one year exposure to air. We also demonstrate the existence of the substrate doping impact on the CuPc ultra-thin film what might be caused by dipole effects.

Lock-in phase analysis of copper phthalocyanine photoabsorption spectrum

Wojdyła M., Derkowska B., Bała W.

Optica Applicata

2005

Vol. 35, nr 3

561-571

The modulated photoabsorption (PA) spectra in Q-band spectral region of copper phthalocyanine (CuPc) thin layer have been investigated using two-channel lock-in phase resolved technique. Combining measurements in-phase and out-phase we determined four different features, which are observed in PA spectra. A detailed analysis of the in-phase and out-phase multicomponent PA spectra and corresponding phase diagram enabled separation of particular components as well as determination of their phase delay angle and corresponding time constants. In the CuPc sample under study, the various components of PA spectrum show different phase shifts, which implies different mechanism giving rise to the photoinduced electric field modulation.