Off-on/On-off双模式水致变色材料:水诱导微环境酸度改变调控罗丹明衍生物颜色切换
卫小燕, 张金艳, 盛兰, 张晓安

Off‑on/On‑off Dual‑Mode Hydrochromic Materials: Water‑Induced Acidity Changes in the Microenvironment Regulate the Color Switching of Rhodamine Derivatives
Xiao-Yan WEI, Jin-Yan ZHANG, Lan SHENG, Sean Xiao-An ZHANG
图3 (A) 材料的结构示意图; (B)“关-开”模式材料加水前后的紫外-可见反射光谱和(C)荧光发射光谱(λex = 560 nm,狭缝宽度: 5 nm, 3 nm); (D) 基于不同酸(λex = 560 nm,狭缝宽度:5 nm,3 nm)的水致变色荧光材料在λmax处的可见反射(左)和荧光发射强度(右)图; (E) 不同状态下的材料图片
Fig.3 (A) Schematic diagram of the material structure; (B) The UV-Vis reflective spectra and (C) fluorescence emission spectra of the “off-on” mode material before and after adding water (λex=560 nm, slit width: 5 nm, 3 nm); (D) Plot of visible reflection(left) and fluorescent emission intensity(right) at λmax of hydrochromic fluorescent materials based on different acid (λex = 560 nm, slit width: 5 nm,3 nm);(E) Picture of materials in different condition