Solvent-free, [Et<sub>3</sub>NH][HSO<sub>4</sub>] catalyzed facile synthesis of hydrazone derivatives
作者:Mehtab Parveen、Shaista Azaz、Ali Mohammed Malla、Faheem Ahmad、Pedro Sidonio Pereira da Silva、Manuela Ramos Silva
DOI:10.1039/c4nj01666a
日期:——
mild reaction conditions, simple operational procedure, easy preparation of catalyst and its recyclability up to five cycles withoutany appreciable loss in catalytic activity. The optimization conditions carried out in the present study revealed that 20 mol% of ionicliquidcatalyst under solvent-free condition at 120 °C are the best conditions for the synthesis of hydrazone derivatives in excellent
Excited state intramolecular single proton transfer mechanism of pigment yellow 101 in solid state: Experiment and DFT calculation
作者:Shen Shen、Xian Liu、Jianqi Sun、Mingda Wang、Zhengjun Jiang、Guomin Xia、Hongming Wang
DOI:10.1016/j.saa.2019.03.076
日期:2019.6
(P. Y. 101) in solidstate, three aromatic aldehyde azines (1–3) including P. Y. 101 have been synthesized and compared with each other. Results indicated that P. Y. 101 prepared by solvothermal method is actually the mixture of two polymorphs, whose molecular packing mode can be transformed into each other by recrystallizing or external stimuli such as pressure and grinding. The ESIPT properties of
The structures of two aldazines: [1,1′-(1<i>E</i>
,1′<i>E</i>
)-hydrazine-1,2-diylidenebis(methan-1-yl-1-ylidene)dinaphthalen-2-ol] (Lumogen) and 2,2′-(1<i>E</i>
,1′<i>E</i>
)-hydrazine-1,2-diylidenebis(methan-1-yl-1-ylidene)diphenol (salicylaldazine) in the solid state and in solution
作者:Artur M. S. Silva、Vera L. M. Silva、Rosa M. Claramunt、Dolores Santa María、Marta B. Ferraro、Felipe Reviriego、Ibon Alkorta、José Elguero
DOI:10.1002/mrc.3983
日期:2013.9
study the structures of Lumogen and salicylaldazine. In the solidstate, Lumogen exists as the dihydroxy tautomer 1a (an azine, CN–NC) as was already known from an X‐ray determination. In a deuterated dimethyl sulfoxide solution, another tautomer is observed besides 1a; its structure corresponds to the hydroxy‐oxo tautomer 1b (a hydrazone, CN–NH–Csp2). In what concerns salicylaldazine, we have observed
[EN] NEW FLUORESCENT COMPOUNDS<br/>[FR] NOUVEAUX COMPOSÉS FLUORESCENTS
申请人:BASF SE
公开号:WO2012095803A1
公开(公告)日:2012-07-19
Disclosed are fluorescent compounds with large Stokes-shift and a process for their preparation. More particularly, disclosed are fluorescent compounds that are colourless. The compounds can be used in compositions for inks, paints and plastics, especially in a wide variety of printing systems and are particularly well-suited for security applications.
Disclosed are fluorescent compounds with large Stokes-shift and a process for their preparation. More particularly, disclosed are fluorescent compounds that are colourless. The compounds can be used in compositions for inks, paints and plastics, especially in a wide variety of printing systems and are particularly well-suited for security applications.