Direct observation of rhodamine dimer structures in water

被引:63
作者
Ilich, P [1 ]
Mishra, PK [1 ]
Macura, S [1 ]
Burghardt, TP [1 ]
机构
[1] MAYO CLIN & MAYO FDN,DEPT BIOCHEM & MOL BIOL,ROCHESTER,MN 55905
来源
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 1996年 / 52卷 / 10期
基金
美国国家卫生研究院;
关键词
dimer conformation; intermolecular distance; self-association; 2D proton NMR; xanthene dye;
D O I
10.1016/0584-8539(96)01719-9
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
Self-association of rhodamine B, rhodamine 6G, and their mixture in aqueous solution has been studied by two-dimensional proton-proton nuclear Overhauser effect spectroscopy in the laboratory (NOESY) and rotating frames (ROESY). The strength of the observed cross-peaks between protons that are distant in the rhodamine monomer demonstrates intermolecular proximity between homodimers of rhodamine B and rhodamine 6G, and between heterodimers of rhodamine B and rhodamine 6G. It is shown that stacking of the xanthene rings occurs in all homo- and heterodimer interactions.
引用
收藏
页码:1323 / 1330
页数:8
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