摘要
A photochromic rhodamine B-based material containing Cd(Ⅱ)as bridge was facilely prepared.The 4-methoxylsalicylaldehyde rhodamine B hydrazone 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.
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.
基金
financially supported by the National Natural Science Foundation of China(21175079 and 21375074)
