Effects of NaCl on the J-aggregation of two thiacarbocyanine dyes in aqueous solutions
文献类型：期刊论文
| 作者 | Xiang, JF; Yang, XR; Chen, CP; Tang, YL; Yan, WP; Xu, GZ |
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2003-02-01 |
| 卷号 | 258期号:1页码:198-205 |
| 关键词 | Chemical Shift Na-23 Nmr J-aggregate Cyanine Dye |
| ISSN号 | 0021-9797 |
| DOI | 10.1016/S0021-9797(02)00187-X |
| 英文摘要 | The effects of NaCl on the aggregation of two typical thiacarbocyanine, dyes (3, 3'-di(3-sulfopropyl)-4, 5, 4', 5'-dibenzo-9-phenyl-thiacarbocyanine triethyl ammonium salt (Dye 1) and 3, 3'-di(3-sulfopropyl)-4, 5, 4, 5'-dibenzo-9-methyl-thiacarbocyanine triethyl ammonium salt (Dye 2)) in aqueous solution have been studied by using absorption spectroscopy, fluorescence spectroscopy, and H-1- and Na-23-NMR measurements. It is found that the J-aggregation of two dyes can be promoted by the addition of NaCl and that the effective coherence length of the J-aggregate is shorter than that obtained without NaCl. Fluorescence spectra demonstrate that the fluorescence intensities of the J-aggregates of two dyes are quenched by addition of NaCl. This is consistent with the decrease of the effective coherence length of J-aggregates of the two dyes in the presence of NaCl. H-1-NMR spectra of two dyes show that the Na+ ions penetrate into the J-aggregates and replace the counterion (triethylammonium ions) in two dyes. The measurements of the chemical shifts of Na-23 nuclei provide further information about the interaction between the Na+ ions and dye anions in the J-aggreggates of the two dyes. Due to this interaction, the electrostatic repulsion between the dye anions in the J-aggregates can be reduced and thus accelerate the aggregation of the two dyes in the presence of NaCl. The apparent association constants between Na+ ions and dye molecules in J-aggregates of Dye 1 and Dye 2 estimated from the measured chemical shifts of Na-23 nuclei are about 2.38 M-1 and 1.35 M-1, respectively. (C) 2003 Elsevier Science (USA). All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000181400400025 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/80417]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Xu, GZ |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, State Key Lab Struct Chem Unstable & Stable Speci, Ctr Mol Sci, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China 3.Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiang, JF,Yang, XR,Chen, CP,et al. Effects of NaCl on the J-aggregation of two thiacarbocyanine dyes in aqueous solutions[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2003,258(1):198-205. |
| APA | Xiang, JF,Yang, XR,Chen, CP,Tang, YL,Yan, WP,&Xu, GZ.(2003).Effects of NaCl on the J-aggregation of two thiacarbocyanine dyes in aqueous solutions.JOURNAL OF COLLOID AND INTERFACE SCIENCE,258(1),198-205. |
| MLA | Xiang, JF,et al."Effects of NaCl on the J-aggregation of two thiacarbocyanine dyes in aqueous solutions".JOURNAL OF COLLOID AND INTERFACE SCIENCE 258.1(2003):198-205. |
入库方式： OAI收割
来源：化学研究所
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