有两种重要且常见的通用树脂 PE 和 PP,即聚乙烯和聚丙烯。随着人们对饮用水的水质要求不断提高,给水管道的材质及质量也受到了人们的关注。在健康、绿色的生活理念的驱动下,给水管道的开发与升级也找到了新的发展方向。目前,常见的抗...有两种重要且常见的通用树脂 PE 和 PP,即聚乙烯和聚丙烯。随着人们对饮用水的水质要求不断提高,给水管道的材质及质量也受到了人们的关注。在健康、绿色的生活理念的驱动下,给水管道的开发与升级也找到了新的发展方向。目前,常见的抗菌剂种类繁多,其中包括无机、有机、天然及高分子等几类抗菌剂,但却能够用于制造抗菌塑料的抗菌剂并不多,其中目前较为常见的是利用银、锌等金属及金属离子的杀菌性能和抑菌性能所制的抗菌剂。但是倘若用 PP 或者是 PE 管材与此类抗菌剂进行物理混合,所得材料中的银、锌等容易发生迁移,导致其抗菌性难以持久。因而,开发并推广具有抗菌作用的塑料材料,对减少管道内的微生物的滋生以及提高水质等,大有脾益。展开更多
A photochromic rhodamine B-based material containing Cd（Ⅱ） as bridge was facilely prepared. The 4-methoxylsalicylalde hyde rhodamine B bydrazone Cd（Ⅱ） complex displayed unusual ring-open response upon 365 nm UV ...A photochromic rhodamine B-based material containing Cd（Ⅱ） as bridge was facilely prepared. The 4-methoxylsalicylalde hyde rhodamine B bydrazone Cd（Ⅱ） complex displayed unusual ring-open response upon 365 nm UV irradiation, exhibiting long photochromic lifetime and good fatigue resistance. The UV-induced ring-open of the complex led to a distinct color and fluorescence change in acetonitrile. A new mechanism was put forward： salicylaldehyde part in the complex underwent UV-promoted isomerization from enol-form to keto-form, enhancing the chelation of Cd（Ⅱ） and yielding the ring-opening rhodamine B part. Compared to other reported photochromic systems, this new photochromic material offered attractive new insights into the development of low cost photochromic materials with good performance.展开更多
文摘有两种重要且常见的通用树脂 PE 和 PP,即聚乙烯和聚丙烯。随着人们对饮用水的水质要求不断提高,给水管道的材质及质量也受到了人们的关注。在健康、绿色的生活理念的驱动下,给水管道的开发与升级也找到了新的发展方向。目前,常见的抗菌剂种类繁多,其中包括无机、有机、天然及高分子等几类抗菌剂,但却能够用于制造抗菌塑料的抗菌剂并不多,其中目前较为常见的是利用银、锌等金属及金属离子的杀菌性能和抑菌性能所制的抗菌剂。但是倘若用 PP 或者是 PE 管材与此类抗菌剂进行物理混合,所得材料中的银、锌等容易发生迁移,导致其抗菌性难以持久。因而,开发并推广具有抗菌作用的塑料材料,对减少管道内的微生物的滋生以及提高水质等,大有脾益。
基金financially supported by the National Natural Science Foundation of China(21175079 and 21375074)
文摘A photochromic rhodamine B-based material containing Cd（Ⅱ） as bridge was facilely prepared. The 4-methoxylsalicylalde hyde rhodamine B bydrazone Cd（Ⅱ） complex displayed unusual ring-open response upon 365 nm UV irradiation, exhibiting long photochromic lifetime and good fatigue resistance. The UV-induced ring-open of the complex led to a distinct color and fluorescence change in acetonitrile. A new mechanism was put forward： salicylaldehyde part in the complex underwent UV-promoted isomerization from enol-form to keto-form, enhancing the chelation of Cd（Ⅱ） and yielding the ring-opening rhodamine B part. Compared to other reported photochromic systems, this new photochromic material offered attractive new insights into the development of low cost photochromic materials with good performance.
