Akademik Veri Yönetim Sistemi
9th International PaintIstanbul & TurkCoat Congress, İstanbul, Türkiye, 5 - 06 Aralık 2023, ss.2
Photoinitiators
have an important place as a building block components in photochemical
reactions. In literature, different studies on synthesis and photochemical
properties of polymeric initiators which containing Polyvinyl Alcohol (PVA),
are available. [1][2]. The synthesis of Thioxanthone attached PVA, which forms
the basis of this study, was carried out by the esterification reaction of PVA
and Thioxanthone Catechol-O,O'-diacetic Acid (TX-Ct), which is in the one-component
Type II photoinitiator class. The photophysical and photochemical properties of
the obtained flexible PVA-based photoactive polymeric film were examined.
Hydrogen
Peroxide (H2O2) , is the end product of many
biochemical reactions and it has important roles in human biology. High level H2O2
production have toxic effects that can cause cell damages in human body. Also, H2O2
can cause tumors, Alzheimer, Parkinson and cardiovascular diseases. For this
reason, H2O2 sensors have important place in clinical
areas [3]. One of the
different types of sensors in the literature; Metal nanoparticle sensors,
attract attention due to their optical, mechanical, electronic, chemical and
magnetic properties, as well as being simple, fast and low-priced. LOD values
and electron transfer rate are increasing in nanoparticle-containing
biosensors. For this reason, nanoparticle forms such as Ag, Au, ZnO and FeO are
often preferred [4].
The
aim of this study was to determine the effectiveness of the synthesized
PVA-TX-Ct photoactive structure as a biosensor in the detection of H2O2.
Considering the interaction of H2O2 and nano structures
such as AgNP and AuNP; in situ AgNP and AuNP formation with PVA-TX-Ct, which
has a high absorption spectrum in the 387 nm band, was detected by UV-Vis
Spectrophotometry. It was determined that the PVA-TX-Ct-NP system was sensitive
to H2O2 according to the SPR band changes of AgNp and
AuNp with the addition of H2O2. SEM, EDS and DLS
techniques were used to elucidate nanoparticle sizes, distributions and the
mechanism of biosensor activities.
Keywords: H2O2
Sensors, PVA, TX-Ct, Nanoparticals, AgNP, AuNP
*Ezgi
Nur BALCI, 2210-A BİDEB TÜBİTAK Lisansüstü Bilimsel Araştırmacı
Destekleme Programı kapsamında desteklenmektedir. *
References
[1] Temel, G.,
Aydogan, B., Arsu, N., & Yagci, Y. (2009). Synthesis
and characterization of one-component polymeric photoinitiator by simultaneous
double click reactions and its use in photoinduced free radical polymerization.
Macromolecules, 42(16), 6098–6106. https://doi.org/10.1021/ma901162y
[2] Kara, S., Gacal, B., Tunc, D., Yagci, Y.,
& Pekcan, Ö. (2012). Sorption and desorption of PVA-pyrene chains in and out of agarose gel. Journal of
Fluorescence, 22(4), 1073–1080. https://doi.org/10.1007/s10895-012-1045-1
[3] Sekar, N. K., Gumpu, M.
B., Ramachandra, B. L., Nesakumar, N., Sankar, P., Babu, K. J., Krishnan, U.
M., & Rayappan, J. B. B. (2017). Fabrication of Electrochemical Biosensor
with ZnO-PVA Nanocomposite Interface for the Detection of Hydrogen Peroxide.
Journal of Nanoscience and Nanotechnology, 18(6), 4371–4379. https://doi.org/10.1166/jnn.2018.15259
[4] Nitinaivinij, K., Parnklang, T.,
Thammacharoen, C., Ekgasit, S., & Wongravee, K. (2014). Colorimetric
determination of hydrogen peroxide by morphological decomposition of silver
nanoprisms coupled with chromaticity analysis. Analytical Methods, 6(24),
9816–9824. https://doi.org/10.1039/c4ay02339k