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STUDY OF THERMAL ANALYSIS OF SILICON-CONTAINING
PHTHALOCYANINE PIGMENT
Turayev X.X.,
Shukurov D.X., Ko’charov I.A., Mamarasulova K.I.,
Termiz
davlat universiteti
The metal-containing phthalocyanines have been used traditionally on an
industrial scale for many years. They have long been used as dyes and pigments,
especially in colored printing inks,
as pigments in paints, plastics, metal structures,
and as one of the main materials for dyeing synthetic fibers. Phthalocyanines form
organometallic compounds (metal coordination complexes)
just like plant
chlorophylls. They exhibit good thermal and chemical stability and also have
extensive optical and electronic properties that can be improved as a result of
synthetic modifications such as attaching functional groups around their molecules.
Macrocyclic molecules based on metallic and nonmetallic phthalocyanines are
very thermally and chemically stable and can contain the following most metals (e.g.,
Li, Cu, Zn, Co, Mn, Fe,
and nonmetallic Si, H) phthalocyanins. Organic
semiconductor devices based on a large number of heterostructures are being
intensively studied today due to the simplicity of production technology, the
possibility of using flexible substrates in their production
and their relative
cheapness. These organic semiconductor phthalocyanins are sensitive to light,
resulting in photoane titanium dioxide TiO
2
in the manufacture of dye-sensitive solar
cells (DSSC) and other (OFET) i.e. electronic devices. is used in conjunction with
liquid electrolytes to form a micro-layer on materials [1].
Silicon-containing phthalocyanine is a more intense pigment than other metal-
containing phthalocyanine complexes and has been shown to be sensitive to light by
analysis on a V-5000 Spectrophotometer. In the future, this phthalocyanine complex
will be widely used in dye-sensitive solar cells [2]. Because,
it has the property of
transmitting charge and absorbing the visible light spectrum well. Solar panels, which
are sensitive to dyes in the literature today, are also called Gratsel cells. Rutin-based
complex substances are used as dyes [3]. Since this dye is economically expensive
and its preparation process is very complicated, we used silicon phthalocyanine
pigment as an alternative to routine dyes. Silicon-preserved phthalocyanine pigment
differs from rutinic pigment in that it has a
high assimilation coefficient, is
environmentally friendly and inexpensive.
Thermal analysis of the new silicon-containing phthalocyanine (SiPc) pigment
was performed in the temperature range of 20–500 °C. The resulting derivatogram is
shown in Figure-1 and consists of 4 curves. Analysis of the differential
thermogravimetric analysis curve (DTGA) (curve 2) shows that the DTGA curve
occurs mainly in 2 intensive decomposition temperature ranges. Decomposition range
1 corresponds to a temperature of 53-254°C, and decomposition range 2 corresponds
to a temperature of 258-479 °C.