We report the synthesis and characterization of a series of symmetrical indolenine-based squaraine dyes along with the evaluation of their singlet oxygen generation efficiency. The photodynamic activity of these new photosensitizers has been evaluated on a human tumor fibrosarcoma (HT-1080) cell line. The cytotoxicity increased over time and is induced by the photoactivation of bromo (Br–C4) and iodio
The one-step reaction of a dicyanovinyl-functionalized squaric acid with Fischer bases afforded C2v symmetric squaraine dyes with rigid planar structures due to intramolecular N–H⋯O hydrogen bonds.
Molecular structure and spectral properties of indolenine based norsquaraines versus squaraines
作者:Olga S. Kolosova、Svitlana V. Shishkina、Vered Marks、Gary Gellerman、Iryna V. Hovor、Anatoliy L. Tatarets、Ewald A. Terpetschnig、Leonid D. Patsenker
DOI:10.1016/j.dyepig.2018.12.007
日期:2019.4
dyes, wherein the oxygen of the squaric acid bridge was substituted with a barbituric or a dicyanomethylene group, were synthesized and their molecular structure, spectral and luminescent properties were compared to those of analogous squaraine dyes. The molecular structure was investigated using X-ray analysis, NMR spectroscopy and ab initio DFT B3LYP/6-311G (d, p) simulations. The calculated populations
A microwave-assisted method for the preparation of a wide color range of 2,3,3-trimethylindolenine-based squaraines and their intermediates is described. This practical approach allows the rapid preparation of both symmetrical and nonsymmetrical Squaraine dyes, reducing reaction time from days to minutes with more than 2-fold improvement in product yields when compared to,conventional methods.
SQUARYLIUM DYE, METHOD OF PRODUCING THE SAME, PHOTOELECTRIC CONVERSION ELEMENT CONTAINING THE DYE, AND SOLID-STATE IMAGING DEVICE
申请人:NOMURA Kimiatsu
公开号:US20080308149A1
公开(公告)日:2008-12-18
A squarylium dye represented by formula (1):
wherein A
1
and B
1
each independently represents a ring structure, and R
1
and R
2
each independently represents a substituent having a carbon number of 1 to 12.