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本文根据糠酸阳离子交换树脂的红外吸收光谱和ESR,讨论了它的化学结构。认为在特定的反应条件下,糠酸呋喃环经过开环,失羧和交联反应,生成了共轭的不饱和C=C键。由ESR发现这种树脂有未成对电子,其g因子为2.0088,树脂中未成对电子是高度共轭的非定域化的,从而确定了它具有半导体性。由树脂的电阻率与温度的关系,发现这种树脂是一种本征半导体;它在不同的外加电压下,可见光和紫外光辐照时,有明显的光电效应。
In this paper, the chemical structure of Furoic acid cation exchange resin is discussed based on its infrared absorption spectrum and ESR. Under specific reaction conditions, the furan ring of furfural undergoes ring-opening, decarboxylation and cross-linking reaction to form a conjugated unsaturated C = C bond. This resin was found by ESR to have unpaired electrons with a g factor of 2.0088. Unpaired electrons in the resin were highly conjugated non-localized and thus confirmed to be semiconducting. According to the relationship between the resistivity of the resin and the temperature, it is found that this resin is an intrinsic semiconductor; it has obvious photoelectric effect under different applied voltage and visible light and ultraviolet light irradiation.