Photo-dimerization characteristics of coumarin pendants within amphiphilic random copolymer micelles

被引：19
|
作者：
Chang, Huan [1 ]
Shi, Mei [1 ]
Sun, Ya-nan [2 ]
Jiang, Jin-qiang [1 ]
机构：
[1] Shaanxi Normal Univ, Key Lab Appl Surface & Colloid Chem, Minist Educ Sch Chem & Chem Engn, Xian 710062, Peoples R China
[2] Shandong Vocat Coll Ind, Zibo 256414, Peoples R China
来源：
CHINESE JOURNAL OF POLYMER SCIENCE | 2015年 / 33卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Polymer micelles; Coumarin; UV-Vis-NIR; Photo-dimerization; Photo-cleavage; POLYMER MICELLES; PHOTODIMERIZATION; STABILIZATION; MICELLIZATION; RELEASE; PROBE; CORE;
D O I：
10.1007/s10118-015-1657-4
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The photo-dimerization characteristics of coumarin pendants within amphiphilic random copolymer micelles in aqueous solution was comprehensively investigated using various selected wavelength light in the UV-Vis-NIR region. The time-dependent photo-dimerization degree (PD) changes in the photo-dimerization experiments showed saturating behaviors with intensity-independent of PDmax values at 28%, 44%, 92%, 85%, 36%, 35%, 32% and 31% for 254, 288, 320, 360, 400, 500, 650 and 900 nm irradiations, respectively. The irradiation experiments at 254 and 288 nm announced the occurring of an asymmetric equilibrium of photo-dimerization and photo-cleavage at the used conditions. Both the alternative irradiation cycles of 360 and 254 nm, 650 and 254 nm showed a partially, but evidently reversible photo-dimerization tendency.
引用
收藏
页码：1086 / 1095
页数：10
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