ICCAS OpenIR
Effects of NaCl on the J-aggregation of two thiacarbocyanine dyes in aqueous solutions
Xiang, JF; Yang, XR; Chen, CP; Tang, YL; Yan, WP; Xu, GZ
2003-02-01
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume258Issue:1Pages:198-205
AbstractThe 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.
KeywordChemical Shift Na-23 Nmr J-aggregate Cyanine Dye
DOI10.1016/S0021-9797(02)00187-X
Indexed BySCI
Language英语
WOS IDWOS:000181400400025
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Cited Times:46[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80418
Collection中国科学院化学研究所
Corresponding AuthorXu, GZ
Affiliation1.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
Recommended Citation
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.
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