Two-photon photopolymerization directly initiated by spiropyran photochromic molecules  

作　　者：Dandan Ge Jean Aubard Erell Bodinier Safi Jradi Stéphanie Lau-Truong Nordin Felidj Renaud Bachelot Anne-Laure Baudrion 

机构地区：[1]Light,nanomaterials,nanotechnologies(L2n)Laboratory,CNRS EMR7004,Universitéde Technologie de Troyes,12 rue Marie Curie,10004 Troyes Cedex,France [2]UniversitéParis Cité,CNRS,ITODYS,F-75013 Paris,France

出　　处：《Light(Advanced Manufacturing)》2023年第1期12-22,共11页光（先进制造）（英文）

基　　金：the region Grand-Est and FEDER funds for their support through a postdoctoral fellowship.

摘　　要：Here,we report the ability of spiropyrans to initiate two-photon polymerization(TPP)for the first time in the literature.The comparison and synergies between the spiropyran photochromic molecule of interest,namely 6-nitro-BIPS,and well-known photoinitiators of radical photopolymerization have been studied.The spiropyran(SPy)molecule can initiate TPP in the presence of trifunctional acrylic monomers and create true 3D structures.The comparison with Irgacure 819,a well-known Type-I photoinitiator,shows that SPy has a comparable capability for TPP.In addition,the combination of SPy with methyl diethanolamine increased the reactivity of both one-and two-photon polymerizations.In the last section,we discuss which SPy isomer is the active photochromic species capable of generating radicals for initiating two-photon polymerization.

关 键 词：SPIROPYRAN Direct laser writing Two-photon-photopolymerization PHOTOCHROMISM 

分 类 号：O43[机械工程—光学工程]