Two structural-simple 3-aryl-2-cyano acrylamide derivatives (CDPA-E and CDPA-P) were synthesized and characterized by NMR, MS, IR, and single crystal. It was found that both of them exhibited obvious piezofluorochromic properties. The as-prepared yellow-green compounds were both converted to orange-red after grinding with a spatula. All the ground samples can be recovered to its original color by heating at 80 degrees C over 5 min or fuming with solvents like DCM, ethanol, ethyl acetate etc. The changes in fluorescence color can be attributed to the phase transition between crystalline (order) state and amorphous (disorder) state according to the Powder XRD spectrum. At the molecular level, the extension of the conjugation length and the formation of excimers are confirmed to account for the color transition of CDPA-P and CDPA-E, respectively. In addition, CDPA-P exhibited AIE activity which was caused by the restricted rotation of the molecules in the crystal state. (C) 2014 Elsevier Ltd. All rights reserved.
5-Phenyl-1,2,3,4-tetrahydronaphthalene derivatives: Synthesis, spectroscopic and electrochemical investigation
作者:Marek Pietrzak、Agnieszka Bajorek
DOI:10.1016/j.dyepig.2012.07.009
日期:2013.1
characterized. The dyes were prepared in two-stage synthesis reaction. The 2-cyano-3-[4-aminophenyl]-2-propenamide derivatives, and the final dyes were characterized by 1H and 13C NMR spectroscopy and their purity was checked by thin-layer chromatography and finally HPLC. The spectroscopic properties of the prepared dyes were studied in four different solvents.
已经完全合成和表征了一系列新颖的染料,其结构基于5-苯基-1,2,3,4-四氢萘骨架。在两步合成反应中制备染料。通过1 H和13 C NMR光谱对2-氰基-3- [4-氨基苯基] -2-丙烯酰胺衍生物和最终染料进行表征,并通过薄层色谱法和最后通过HPLC检查其纯度。在四种不同的溶剂中研究了所制备染料的光谱性质。