Synthesis and Properties of 1-(4-Aminophenyl)-2,4-dicyano-3-diethylamino-9,9-diethylfluorenes: Potential Fluorescent Material

Abstract

Four new fluorenes bearing two electron donors and two electron acceptors were synthesized and found to emit blue fluorescence in both solution and solid states.

Novel A–π–D–π–A type molecules based on diphenylamine and carbazole with large two-photon absorption cross section and excellent aggregation-induced enhanced emission property

“…5H),6.94 (d,J = 9.2 Hz,benzylidene)malononitrile (2b) 25 The compound was synthesized by the same procedure as described for 2a using 1b and malononitrile as starting materials. Yield: 89.55%.…”

2,6-Dicyanoaniline based donor-acceptor compounds: the facile synthesis of fluorescent 3,5-diaryl/hetaryl-2,6-dicyanoanilines

“…3 In addition, the 2,6-dicyanoanilines type of A-D-A system constitutes a part of the molecular framework of many biological important compounds such as quinolines, isoquinolines, tetrahydroisoquinolines, fluorenes, 9-oxofluorenes, benzofurans, naphthalenes, steroids, quinazolines, phenoxazines and coumarins. [4][5][6][7][8][9][10][11][12][13][14][15][16][17] The most studied derivatives of 2,6-dicyanoanilines are 3,5-disubstituted-2,6-dicyanoanilines, and many synthetic procedures and catalyst systems have been used in the synthesis of 3,5-disubstituted-2,6-dicyanoanilines. 3 They are generally obtained from one-pot reaction process via multicomponent domino coupling reaction pathway by using appropriate aldehyde and ketone.…”

Synthesis, Crystal Structures, and Photophysical Properties of Triphenylamine-Based Multicyano Derivatives

“…Aldehyde 6 was synthesized according to a previously reported method . Dicyanovinyl derivative 1 was synthesized by condensation of 6 with malonodinitrile . The reaction was carried out in ethanol at room temperature with triethylamine as catalyst and produced 1 in 80% yield (Scheme ).…”