摘要
以N,N-二甲基甲酰胺(DMF)为溶剂,醋酸酐为脱水剂,将传统三嗪氨基二苯乙烯荧光分子通过脱水闭环反应对马来酸酐改性,并与苯乙烯共聚合成了系列N-三嗪马来酰亚胺聚合型荧光增白剂。采用UV、荧光发射光谱等研究了其在水和DMF中光物理特性和光化学顺反异构性能及取代基的影响。研究表明,共聚后反式活性荧光单体固定在大分子链上,可显著提高发色团的稳定性及荧光量子产率,降低光致异构现象。同时三嗪环上取代基的类型对光吸收和荧光分配并无显著影响,顺反式异构体的比例主要取决于取代基性质,溶剂的极性影响三嗪-二苯乙烯荧光物质光物理化学性质。
The series of N-triazene-maleimide polymeric fluorescent brightener were synthesized by using styrene,maleic anhydride（MAH） as monomers modified by tradition triazinylamino-stilbene fluorescentbrightener with N,N-dimethyl formamide（DMF） as solvent and acetic anhydride as dehydrating agent. The photophysical characteristics in aqueous and DMF solutions and their photochemical trans–cis isomerisation as well as the effect of substituent were studied by ultraviolet ray absorption in solutions and fluorescence emission properties of polymeric fluorescent brightener. The research result shows that the active fluorescent component of the polymeric fluorescent brightener which was bonded in the macromolecule chains can enhance chromogen photochemical stability,increase their fluorescence quantum yield and reduce phenomena of photoisomerization. Meanwhile,the type of substituents in the triazine ring can not affect significantly absorption-fluorescence assignments and the concentration of trans-and cis-isomers mainly depends on the nature of the substituents. The photophysics and photochemical properties of triazene-stilbene fluorescence brighteners are markedly determined by solvent polarity.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2010年第9期12-15,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(5037302)
陕西省自然科学研究项目(2009JM2010)
陕西省教育厅科学研究计划项目(09JK801)
