Systematic Studies on Photoluminescence of Oligo(arylene-ethynylene)s: Tunability of Excited States and Derivatization as Luminescent Labeling Probes for Proteins
作者:Yong-Gang Zhi、Siu-Wai Lai、Queenie K.-W. Chan、Yuen-Chi Law、Glenna S.-M. Tong、Chi-Ming Che
DOI:10.1002/ejoc.200600103
日期:2006.7
p-X(C 6 H 4 C≡C) 2 SiH 3 (X = NH 2 , H). Functionalization of the oligo(arylene-ethynylene)s with the N-hydroxysuccinimidyl (NHS) moiety enabled covalent attachment of the fluorophore to HSA protein molecules. A series of fluorescent labels, namely p-X(C 6 H 4 C≡C) n -C 6 H 4 NHS, (n = 1, X = NH 2 , NMe 2 , SMe, OMe, OH, F; n = 2, 2, X = NH 2 , NMe 2 ) and p-Me 2 NC 6 H 4 C≡C(C 4 H 2 S)-C≡CC 6 H 4 NHS were
Sonogashira 合成了具有不同共轭长度的功能化低聚(亚苯基-乙炔基)(OPE),pX(C 6 H 4 C≡C) n SiMe 3 (n = 1-4; X = NH 2 , NMe 2 , H) (亚苯基-乙炔基) s 和 1-iodo-4-(trime-thylsilylethynyl) 苯的偶联,然后用氢氧化钾对对位取代的(三甲基甲硅烷基乙炔基)苯进行脱甲硅烷基化。检查了具有不同链长的 OPE 系列的光致发光特性及其溶剂致变色反应。吸收最大值随着 -(C 6 H 4 C≡C)- 单位 (n) 数量的增加而红移,并且对于每个系列获得了吸收能量最大值与 1/n 的线性关系图。二氯甲烷中的发射光谱显示出宽且无结构的带,其能量(以波数表示)也与 1/n 线性拟合。NH 2 - 和NMe 2 - 取代的OPE 的吸收和发射波长最大值都表现出显着的溶剂依赖性,而母体OPE (X = H) 在不同溶剂中仅表现出λ