Synthesis and properties of 3,6-bis(dimethylamino)fluorenylium dye ethynologues: new highly bathochromic π-electron system
- 1 January 1991
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 8,p. 1881-1886
- https://doi.org/10.1039/p19910001881
Abstract
A series of acetylenic analogues of 3,6-bis(dimethylamino)fluorenylium dye, which absorb near-IR light (up to 1096 nm in CH2Cl2), have been systematically prepared and their characteristic lightabsorption spectroscopic properties, as well as their pKR +-values, are discussed with the aid of PPP-SCF-MO calculations, and compared with data for the corresponding unbridged triphenylmethane dye ethynologues.Keywords
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