144630-65-9Relevant academic research and scientific papers
Supramolecular assembly of a new squaraine and β-cyclodextrin for detection of thiol-containing amino acids in water
Luo, Chao,Zhou, Qianxiong,Lei, Wanhua,Wang, Jianguang,Zhang, Baowen,Wang, Xuesong
, p. 662 - 668 (2011)
A new unsymmetrical aniline-based squaraine (SQ2) bearing binding unit of Hg2+ ion was designed and synthesised. SQ2 can form 1:2 inclusion complex with β-cyclodextrin, and the resulting complex, which undergoes absorption and fluorescence blea
Synthesis of bisquaraine dyes. Novel homologues of 1,2-squaraines bearing symmetrical and unsymmetrical structures
Hyodo,Nakazumi,Yagi,Nakai
, p. 2823 - 2830 (2001)
In order to investigate analogous structures of 1,2-squaraine dyes, bisquaraines 1 and 2 are newly prepared as their novel homologues. Symmetrical bisquaraine dye 1, in which the same heterocyclic components are introduced at the 3 and 3′ positions of the
The synthesis and 1O2 photosensitization of halogenated asymmetric aniline-based squaraines
Luo, Chao,Zhou, Qianxiong,Jiang, Guoyu,He, Liqing,Zhang, Baowen,Wang, Xuesong
experimental part, p. 1128 - 1132 (2011/07/08)
The halogenated (brominated or iodinated) squaraines have promising potential in the application of photodynamic therapy (PDT). Though aniline-based squaraines are the most classical squaraine dyes, no halogenated derivatives with the halogen atoms directly incorporated in the conjugation skeleton of the squaraine chromophore have been reported so far. In this work, a stepwise synthetic approach, i.e. by way of the halogenated semi-squaraines, was applied successfully to prepare halogenated asymmetric aniline-based squaraines. Such a structure makes iodine atoms be able to exert significant heavy atom effect on the intersystem crossing (ISC) efficiency of the squaraine dye. As a result, the iodinated asymmetric squaraine (SQ-OH-I) exhibits a singlet oxygen ( 1O2) quantum yield as high as 0.54. In contrast, the 1O2 quantum yield of the non-halogenated squaraine analogue (SQ-OH) is only 0.02. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2011.
Synthesis of near-infrared absorbing bisquarylium dyes bearing unsymmetrically extended π-conjugation structures
Yagi, Shigeyuki,Nakai, Kazuhisa,Hyodo, Yutaka,Nakazumi, Hiroyuki
, p. 413 - 417 (2007/10/03)
Novel cationic bisquarylium dyes 3 and 4 were prepared by the reaction of benzothiazolinosquarylium dye 2 with a series of 4-substituted 3-hydroxy or 3-ethoxycyclobut-3-ene-1,2-diones. These dyes exhibit large and intense absorptions in the near-infrared region with varying absorption maxima in the range of 771 to 815 nm.
