53304-20-4Relevant academic research and scientific papers
Functionalization of 9-(Dicyanomethylene)fluorene derivatives with substituted acetylenes
Wong, Wai-Yeung,Lu, Guo-Liang,Choi, Ka-Ho,Lin, Zhenyang
, p. 365 - 373 (2003)
Treatment of (2,7-dibromo-9H-fluoren-9-ylidene)malononitrile (1) with excesses of substituted acetylenes RC ≡ CH [R = Ph, MeC6H4, (η5-C5H5)Fe(η5- C5 H4)] under Sonogas
Antitumor activity of diethynylfluorene derivatives of gold(I)
, p. 7872 - 7877 (2009)
A list of diethynylfluorenes and their gold(I) derivatives have been studied for their antitumor activity as a function of their structure-activity relationships. End-capping the fluoren-9-one unit with gold(I) moieties could significantly strengthen the
Synthesis and two-photon absorption spectrum of fluorenone-based molecules
Dipold,Batista,Fonseca,Silva,Moura,dos Anjos,Simas,De Boni,Mendonca
, p. 1 - 8 (2016/09/09)
The two-photon absorption (2PA) of five symmetrical fluorenone-based molecules is studied by femtosecond wavelength-tunable Z-scan, as well as quantum-chemical calculations. The molecules are transparent for wavelengths greater than 500?nm and two main one-photon absorption bands are observed in the blue region; one weak, centered at 450?nm, and a stronger one at approximately 360?nm. We observed a strong 2PA band located around 720?nm with maxima 2PA cross-sections between 100 and 230?GM. Quantum chemical calculations employing the response function formalism were performed at the Density Function Theory level to support the interpretation of the experimental nonlinear spectra.
Synthesis and photophysics of ambipolar fluoren-9-ylidene malononitrile derivatives
Estrada, Leandro A.,Neckers, Douglas C.
supporting information; experimental part, p. 8484 - 8487 (2010/02/28)
(Figure Presented) The efficient synthesis of ambipolar 2,7- and 3,6-disubstituted fluoren-9-ylidene malononitrile derivatives (4 and 9) is described. Structure-activity relationships depend on the position of substitution. Population of the S1 excited state in the 2,7-disubstituted FM derivatives is achieved via higher states, as evidenced from the UV-vis absorption and emission spectra. The results are supported by TDDFT calculations. Charge transfer states were the main deactivation path of the excited states of ambipolar 9b in polar solvents, as evidenced by fluorescence spectroscopy. 2009 American Chemical Society.
Self-assembly of quinodimethanes through covalent bonds. Part III. Investigations on the preparation of nanostructures
Ipaktschi, Junes,Hosseinzadeh, Rahman,Schlaf, Peter,Eckert, Thomas
, p. 1224 - 1238 (2007/10/03)
As part of our studies on the tetramerization of quinodimethane 1 to the macrocyclic compound 2, the influence of substituents on this reaction was investigated. It was found that a large range of substituents such as 2- phenylethyl, 2-(4-methoxyphenyl)et
