摘要：Organic persistent room-temperature phosphorescent(RTP)materials are promising for applications requiring the secure recording and anti-counterfeiting features owing to their appealing optical *** critical challenges,such as the difficulty to obtain high-quality patterns over large areas and low security levels,need to be addressed to meet the requirements for commercial ***,we prepared a series of quaternary phosphonium salts with different alkyl chains,which showed interesting organic persistent *** ionic characteristics and the alkyl chains of these molecules impart abundant weak intermolecular *** confers the molecules a high crystallinity,which helps to preserve the persistent RTP properties and cover large ***,the RTP lifetime of these organic salts varies over a wide range(1.27 to 884.71 ms)and can be tuned by simply changing the alkyl chain length and counterions,which opens new possibilities in multi-level information encryption *** is believed that the engineering of organic salts with tunable persistent RTP lifetimes and large-area printing can promote early-stage demonstrations of security applications into mature commercialization.

摘要：针对L-硒-甲基硒代半胱氨酸的合成存在操作安全系数低、后处理成本高的问题,研究开发一种新的合成方法。通过小试获得优化的工艺条件,设计并搭建中试生产线,以验证合成工艺稳定性。小试研究结果表明:L-丝氨酸经氯化获得3-氯-L-丙氨酸盐酸盐(产率:89.7%)、再与三乙酰氧基硼氢化钠法制备的二硒化二钠反应生成L-硒代胱氨酸(产率:73.0%)、最后在反应物L-硒代胱氨酸、碘甲烷、三乙酰氧基硼氢化钠物质的量比=1.00:4.02:1.58条件下经还原、甲基化获得目标产物(产率:78.3%)。在相同的工艺条件下,中试可以获得与小试接近或更高的产率,为L-硒-甲基硒代半胱氨酸的工业化生产奠定坚实基础。