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Synthesis and Photochromic Properties of the Derivatives of spiropyrans Containing a Mesogenic Group

Chinese Chemical Letters 2005年第10期16卷 1290-1292页

作者： Hui GUO Yong Bin GAO Jie HAN Xu LI Ji Ben MENG Department of Chemistry Nankai University Tianjin 300071

Two series of novel spiropyran derivatives containing a mesogenic group have been prepared. Their photochromic behaviors were first investigated with the aid of absorption spectral measurements.

关键词： Photochromic spiropyrans liquid crystal.

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Learning from spiropyrans:How to Make Further Developments of Donor-Acceptor Stenhouse Adducts

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Chinese Journal of Chemistry 2021年第4期39卷 985-998页

作者： Yongli Duan Haiquan Zhao Chaoyue Xiong Lijun Mao Dongsheng Wang Yonghao Zheng School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaJianshe North Road Section 2 No.4ChengduSichuan 610054China Institute of Electronic and Information Engineering of UESTC in Guangdong Zongbu Second Road No.17DongguanGuangdong523808 China

Donor-acceptor Stenhouse adducts(DASAs)as a species of novel photochromic molecules,have been developing rapidly and attracting broad researchers’sights since *** show visible/near-infrared(NIR)light induced linear-to-cyclic isomerization and heat induced cyclic-to-linear isomerization,therefore they are attractive in photoresponsive hydrogels,drug delivery,cell culturing and tissue *** a series of well-known photoresponsive molecules,spiropyrans(SPs)show similar molecular properties and comparable photoswitching with *** light triggers closed-to-open(also known as spirocyclic(SC)-to-merocyanine(MC))isomerization of SPs,while the reversed open-to-closed isomerization occurs under visible light or *** irradiation switches the molecular color,scale,geometry,and polarity of SPs and DASAs *** the researches on DASAs are still in the infancy,the chemical structures,isomerization mechanisms and potential applications need to be further investigated and *** well-studied SPs have important reference values to the comprehensive developments of *** the present review,we summarized,compared and discussed SPs and DASAs with regards to their molecular structures,synthesis,photoswitching and *** also make our perspective on the developments of DASA in future.

关键词： Photoresponsive Donor-acceptor Stenhouse adducts spiropyrans Applications Isomerization

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Novel elastomeric spiropyran‑doped poly(dimethylsiloxane)optical waveguide for UV sensing

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Frontiers of Optoelectronics 2024年第3期17卷 1-15页

作者： Camila Aparecida Zimmermann Kof Novignon Amouzou Dipankar Sengupta Aashutosh Kumar Nicole Raymonde Demarquette Bora Ung Department of Electrical Engineering École de Technologie SupérieureMontrealQC H3C 1K3Canada Department of Mechanical Engineering École de Technologie SupérieureMontrealQC H3C 1K3Canada

Novel poly(dimethylsiloxane)(PDMS)doped with two diferent spiropyran derivatives(SP)were investigated as potential candidates for the preparation of elastomeric waveguides with UV-dependent optical ***,free-standing flms were prepared and evaluated with respect to their photochromic response to UV ***,reversibility as well as photofatigue and refractive index of the SP-doped PDMS samples were ***,SP-doped PDMS waveguides were fabricated and tested as UV sensors by monitoring changes in the transmitted optical power of a visible laser(633 nm).UV sensing was successfully demonstrated by doping PDMS using one spiropyran derivative whose propagation loss was measured as 1.04 dB/cm at 633 nm,and sensitivity estimated at 115%change in transmitted optical power per unit change in UV *** decay and recovery time constants were measured at 42 and 107 s,respectively,with an average UV saturation dose of 0.4 J/*** prepared waveguides exhibited a reversible and consistent response even under *** sensor parameters can be tailored by varying the waveguide length up to 21 cm,and are afected by white light and temperatures up to 70℃.This work is relevant to elastomeric optics,smart optical materials,and polymer optical waveguide sensors.

关键词： spiropyrans PDMS Photochromism Polymer optical waveguides UV detection

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基于碳点功能化的二氧化硅封装螺吡喃的光响应材料用于动态信息加密

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Science China Materials 2024年第2期67卷 680-689页

作者：朱姜昆赵慧敏杨玉慧吴伟胡磊磊卫尤豪高阳旸 School of Materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China Department of Polymer Materials Zhejiang Sci-Tech UniversityHangzhou 310018China Institute of Smart Biomedical Materials Zhejiang Sci-Tech UniversityHangzhou 310018China Zhejiang Sci-Tech University Shengzhou Innovation Research Institute Shengzhou 312451China

开发刺激响应荧光材料对于解决信息安全的新兴需求至关重要.本文中,我们提出了一种刺激响应双发射荧光材料SP@SiO_(2)-CDs(SP:螺吡喃),该材料是通过将螺吡喃化合物封装到碳点功能化的二氧化硅中得到的.这种复合材料显示碳点在470 nm处... 详细信息

开发刺激响应荧光材料对于解决信息安全的新兴需求至关重要.本文中,我们提出了一种刺激响应双发射荧光材料SP@SiO_(2)-CDs(SP:螺吡喃),该材料是通过将螺吡喃化合物封装到碳点功能化的二氧化硅中得到的.这种复合材料显示碳点在470 nm处发射蓝色光,螺吡喃在620 nm处发射红色光.在连续紫外光(365 nm)照射下,螺吡喃分子经历从闭环到开环的过程,SiO_(2)-CDs和异构部花青之间可以实现显著的荧光能量共振转移.SP@SiO_(2)-CDs复合物粉末不仅可以在紫外光刺激下光致变色从黄色到粉色,而且可以实现从淡蓝色到橙红色的双发射荧光转换.当暴露在白光下时,这种动态荧光行为可以完全恢复到初始状态.基于荧光的时间依赖性,本文成功开发了动态防伪图案和多重编码.此外,通过掺杂聚二甲基硅氧烷,获得了具有高柔韧性和机械强度的薄膜,并展示了其在高级信息加密中的应用.该工作为提高离线便携式信息加密的安全性提供了一种新方法.

关键词： spiropyrans dual-emitting carbon dots dynamic fluorescence time-dependent information encryption

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