应用化学 ›› 2022, Vol. 39 ›› Issue (7): 1119-1128.DOI: 10.19894/j.issn.1000-0518.210334

• 研究论文 • 上一篇    下一篇

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   

  1. 吉林大学超分子结构与材料国家重点实验室,长春 130012
  • 收稿日期:2021-07-09 接受日期:2021-10-22 出版日期:2022-07-01 发布日期:2022-07-11
  • 通讯作者: 盛兰
  • 作者简介:第一联系人:共同第一作者
  • 基金资助:
    国家自然科学基金(21975099);吉林省科技发展计划优秀青年人才基金(20190103126JH)

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   

  1. State key Laboratong of Supramolecular Strccture and Materiats,Jilin University,Changchun 130012,China
  • Received:2021-07-09 Accepted:2021-10-22 Published:2022-07-01 Online:2022-07-11
  • Contact: Lan SHENG
  • About author:shenglan17@jlu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21975099);the Outstanding Youth Talent Fund Project of Jilin Provincial Science and Technology Development Program(20190103126JH)

摘要:

基于罗丹明衍生物(4-N-丙烯酰胺-(3',6'-双(二乙氨基)-螺[异苯并呋喃-1,9'-氧杂蒽]-3-酮)(AM-RhB)在适度酸性条件下(4.4<pH<6)会发生内酯环开环而显示颜色或发射荧光,而在强酸环境下(pH<1)会发生过度质子化而使颜色和荧光均“消失”的现象,提出了一种新的双模式水致变色材料制备方法。AM-RhB与固体酸混合作为显色层,通过水的引入与去除来调节固体酸的酸性(减弱或增强),从而改变分子处于开环或过度质子化状态,从而调控材料的颜色与荧光有与无(on/off)之间的可逆变化。通过分别选用不同的固体酸(苯磺酸和氨基磺酸),实现了“关闭-开启”(off-on)和“开启-关闭”(on-off)两种不同显色模式切换的双模式水致变色材料,并展现了其在喷水无墨打印可重复书写纸方面的应用。所制备的打印纸水写前后颜色反射率变化>25%,荧光强度变化>700,且可以循环使用5次以上。该工作为新型水致变色材料的开发提供了一种新的思路。

关键词: 罗丹明, 水致变色材料, 双模式, 微环境

Abstract:

Based on the phenomenon that rhodamine derivatives (4-N-acrylamide-(3',6'-bis(diethylamino)-spiro[isobenzofuran-1,9'-xanthene]-3-one) (AM-RhB) will open the lactone ring to display color or emit fluorescence under moderate acidic conditions (4.4<pH<6) and will occur excessive protonation, color and fluorescence are “lost” when they are in strongly acidic microenvironment (pH<1), we propose a new strategy for constructing dual-mode hydrochromic materials. AM-RhB is mixed with solid acid as the imaging layer, and the acidity of the solid acid is adjusted (weakened or strengthened) by introducing and removing water to make the molecule in the ring-open form or excessive protonation state, thereby regulating the reversible change between the color and fluorescence of the material (on/off). By selecting different solid acids (benzenesulfonic acid and sulfamic acid) respectively, we realize the “off-on” and “on-off” two different color rendering modes of the dual-mode hydrochromic materials, and demonstrate its application in Water-jet printing. The prepared printing paper shows high reflectivity change (optical modulation) (>25%) and fluorescence intensity modulation (>700) before and after stimulating with water, and good reversibility (> 5 times). This work will provide a promising way for the development of new hydrochromic materials.

Key words: Rhodamine derivatives, Hydrochromic material, Dual-mode, Microenvironment

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