A series of 2-phenmethylamino-7-methyl-1,8-naphthyridine/alkali metal ion (Li⁺ and Na⁺) complexes have been synthesized using a polymeric medium (poly(acrylic acid)) as the key activating component. Upon exposure to methanol or ethanol vapour at ambient temperature, the emission colour of prepared complexes in solid powder and thin film states changes from red-orange or pink to blue, respectively. These phenomena are reversible and rapid (about 5-10 s), hence, the prepared complexes have potential applications as chemosensor materials for detection of volatile methanol vapour.

中文翻译：

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基于2-苯甲基氨基-7-甲基-1,8-萘啶的气相致变色碱金属离子配合物

使用聚合物介质（聚（丙烯酸））作为关键活化成分，合成了一系列2-phenmethylamino-7-methyl-1,8-萘啶/碱金属离子（Li ⁺和Na ⁺）配合物。在环境温度下暴露于甲醇或乙醇蒸气后，制得的固体粉末和薄膜状态的配合物的发射颜色分别从红橙色或粉红色变为蓝色。这些现象是可逆且快速的（约5-10 s），因此，制备的配合物具有潜在的应用作为化学传感器材料，用于检测挥发性甲醇蒸气。