Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Journal of Molecular Structure called Triazole-coumarin centered star-shaped polymer: Structural characterizations and electrical properties of graphene composites, Author is Biryan, Fatih, which mentions a compound: 1762-34-1, SMILESS is CC1=CN=C(C=C1)C1=NC=C(C)C=C1, Molecular C12H12N2, Recommanded Product: 5,5′-Dimethyl-2,2′-bipyridine.
In present study, new three-arm initiator containing coumarin group and new 4-(3-(4-methoxyphenyl)acryloyl) Ph acrylate (MPAC) was synthesized. Three-armed star-shaped polymer was obtained by polymerization using ATRP method from the chlorine ends of the initiator. The structure characterization was performed by FT-IR, 1H-NMR, 13C-NMR spectroscopy techniques. Thermal analyzes were performed by using thermogravimetry (TGA) and differential scanning calorimetry anal. (DSC) techniques in a nitrogen atm. Thermal decomposition activation energy (Ea) of star polymer was determined by the Flynn-Wall-Ozawa and Kissinger methods. The average activation energy in the range of 0.02-0.3 conversion range was determined as 115.28 kJ/mol and 152.72 kJ/mol, resp. Polymer composites were prepared by adding graphene particles in different ratios (0.5%, 1.0%, 2.0%, and 4.0% by weight) to the polymer matrix. The dielec. properties of star polymer and graphene composites were investigated in a range of 100 Hz-20 kHz frequency. Besides, the dielec. properties of the pure polymer were examined as a function of frequency at different temperatures (25°C, 40°C, 55°C, 70°C,). Furthermore, the polymer/4% graphene composite/p-Si thin-film heterojunction diode properties were investigated using current-voltage (I-V) anal. at room temperature in dark. The elec. parameters of heterojunction diode such as the rectification ratio (RR), barrier height (Φb) and ideality factor (n) were investigated. The frequency dependence of capacitance and the role of interface states were examined The results showed that chalcone substituted three-arm star polymer/4% graphene composite has a diode and capacitor characteristic.
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