Studies on the Fluorene Derivatives (III)

Spectroscopic Studies of Dimethylamino Derivatives of Fluorene

2-dimethylamino-9-fluorenol and 2-dimethylamino-9(4'dimethylamino)phenyl-9-fiuorenol in polar solvents in the excited state undergo conformation changes in which two fluorescent isomers are created. The isomers (in the local excited (LE) and charge transfer (CT) configuration) possess separate fluorescence bands, one appearing from the S! (LE) state and the second f rom the intramolecular charg...

Studies on nicotinamide derivatives.

Green electrogenerated chemiluminescence of highly fluorescent benzothiadiazole and fluorene derivatives.

A group of highly fluorescent 2,1,3-benzothiadiazole derivatives (BH0-BH3), including two fluorene derivatives (AB2 and C01) were synthesized and characterized. The electrochemical, spectroscopic, and electrogenerated chemiluminescence (ECL) properties of the compounds were determined. Benzothiadiazole derivatives BH1, BH2, and BH3 show reversible oxidation and reduction waves and produce stron...

Impact of electron acceptor on three-photon absorption cross-section of the fluorene derivatives.

Small three-photon absorption (3PA) cross-section values of present nonlinear organic molecules limit their practical applications. Although electron donors and electron acceptors have a great effect on 3PA cross-section, little is known about how the strength and situation of electron acceptors influence the 3PA cross-section value of a compound. The present work reports 3PA effects of two flu...

Studies on the cytotoxicity of asterriquinone derivatives.

The antitumor agent, asterriquinone (ARQ) is a known metabolite isolated from the mycelium of Aspergillus terreus IFO 61231). YAMAMOTO et al. reported that ARQ analogues having a 2, 5-dimethoxy-p-benzoquinone moiety (ARQ dimethyl ether: ARQDMe)2,3) and the 2, 5-diamino-p-benzoquinone moiety (diamino ARQ: ARQDA)4) did not show any Cytotoxicity. As reported in our previous communication5), a new ...