合成了一种新型感光性单体丙烯酸(4 N,N 二甲氨基肉桂酰氧乙基)酯(DMACEA)及其与丙烯酸的共聚物P(DMACEA co AA).用紫外吸收和荧光光谱研究了聚合物溶液的光敏感性,用傅立叶红外光谱研究了聚合物成膜后的光交联性及其过程.结果表明:DMA...合成了一种新型感光性单体丙烯酸(4 N,N 二甲氨基肉桂酰氧乙基)酯(DMACEA)及其与丙烯酸的共聚物P(DMACEA co AA).用紫外吸收和荧光光谱研究了聚合物溶液的光敏感性,用傅立叶红外光谱研究了聚合物成膜后的光交联性及其过程.结果表明:DMACEA具有较好的光敏性,P(DMACEA co AA)具有较好光交联性,交联膜水溶胀和透光性也较好.展开更多
2-Acetamidoacrylic acid or methyl 2-acetamidoacrylate is reacted with solution of sodium of methylselenol to give N-acetyl-Se-methylselenocysteine.The L(and D)-Se-methylselenocysteine have been prepared in high optica...2-Acetamidoacrylic acid or methyl 2-acetamidoacrylate is reacted with solution of sodium of methylselenol to give N-acetyl-Se-methylselenocysteine.The L(and D)-Se-methylselenocysteine have been prepared in high optical purity by treating N-acetyl-Se-methylselenocysteine in water using acylase I from porcine kidney as a catalyst.The influencing factors on the resolution reaction are discussed by orthogonal experiment,including pH value,reaction temperature,concentration of Co2+ and amount of acylase I.Under the optimizing resolution conditions,L(and D)-Se-methylselenocysteine are obtained with>96 % optical purity in about 40% yield.展开更多
文摘合成了一种新型感光性单体丙烯酸(4 N,N 二甲氨基肉桂酰氧乙基)酯(DMACEA)及其与丙烯酸的共聚物P(DMACEA co AA).用紫外吸收和荧光光谱研究了聚合物溶液的光敏感性,用傅立叶红外光谱研究了聚合物成膜后的光交联性及其过程.结果表明:DMACEA具有较好的光敏性,P(DMACEA co AA)具有较好光交联性,交联膜水溶胀和透光性也较好.
文摘2-Acetamidoacrylic acid or methyl 2-acetamidoacrylate is reacted with solution of sodium of methylselenol to give N-acetyl-Se-methylselenocysteine.The L(and D)-Se-methylselenocysteine have been prepared in high optical purity by treating N-acetyl-Se-methylselenocysteine in water using acylase I from porcine kidney as a catalyst.The influencing factors on the resolution reaction are discussed by orthogonal experiment,including pH value,reaction temperature,concentration of Co2+ and amount of acylase I.Under the optimizing resolution conditions,L(and D)-Se-methylselenocysteine are obtained with>96 % optical purity in about 40% yield.
