50262-67-4Relevant articles and documents
EFFECT OF THE REVERSAL OF THE CENTRAL SCHIFF'S BASE LINKAGE ON LIQUID CRYSTAL PROPERTIES: THE 4-PHENYLBENZYLIDENE-4 prime -n-ALKOXYANILINES AND 4-(4 prime -n-ALKOYXBENZYLIDENEAMINO)-BIPHENYLS.
Byron,Keating,O'Neill,Wilson,Goodby,Gray
, p. 179 - 192 (1980)
Twelve 4-phenylbenzylidene-4 prime -n-alkoxyanilines were prepared and their liquid crystal phases categorized. The properties of these compounds are compared with those of the analogous Schiff's bases, the 4-(4 prime -n-alkoxybenzylideneamino)biphenyls,
Quinolines by three-component reaction: Synthesis and photophysical studies
Sales, Eric S.,Schneider, Juliana M. F. M.,Santos, Marcos J. L.,Bortoluzzi, Adailton J.,Cardoso, Daniel R.,Santos, Willy G.,Merlo, Aloir A.
, p. 562 - 571 (2015/03/14)
The synthesis of five quinolines 8-octyloxy-4-[4-(octyloxy)phenyl]quinoline and 6-alkoxy- 2-(4-alkoxyphenyl)-4-[(4-octyloxy)aryl]quinolines are described by three-component coupling reaction mediated by Lewis acid FeCl3 and Yb(OTf)3. 4-n-octyloxybenzaldehyde, anisaldehyde, 4-n-octyloxyaniline p-anisidine, and 1-ethynyl-4-heptyloxybenzene, 1-ethynyl-4-octyloxybenzene and 2-ethynyl-6-heptyloxynaphthalene are the reagents in this protocol. A Yb3+ catalyst resulted in higher yields of quinolines than Fe3+. Polarizing optical microscopy (POM) revealed that none of the quinolines were liquid crystals, even the more anisotropic. UV-Vis measurements of one of the quinolines in polar solvent show two absorption bands at 280 and 350 nm related to π,π?and n,π?transitions. No changes were observed to lower-energy absorption band (ε 4 mol L-1 cm-1) related to n,π?transition. A laser flash photolysis study for one of the quinolines relates a main transient band at 450 nm with a lifetime of 2.6 μs in ethanol, which is completely quenched in the presence of oxygen. This transient band was assigned to triplet-triplet absorption of one of the quinolines, which is semi-oxidised in the presence of phenol. Radiative rate constants have been determined along singlet and triplet excited state energies (3.39 and 3.10 eV, respectively). The chemical structure of one of the quinolines was also unequivocally confirmed by single-crystal X-ray analysis.
The synthesis and NLO properties of 1,8-naphthalimide derivatives for both femtosecond and nanosecond laser pulses
Ye, Gao-Jie,Zhao, Ting-Ting,Jin, Zheng-Neng,Gu, Pei-Yang,Mao, Jia-Yuan,Xu, Qing-Hua,Xu, Qing-Feng,Lu, Jian-Mei,Li, Na-Jun,Song, Yin-Ling
, p. 271 - 277 (2012/05/04)
Four 1,8-naphthalimide derivatives were synthesized for new nonlinear optical(NLO) materials. Hydrazone group as a p-π structure was introduced into the molecule to extend conjugation and produce NLO properties. Their linear and nonlinear optical (NLO) properties were studied in details. The results show that these compounds possess strong excited-state absorption (ESA) properties and optical limiting with nanosecond laser pulses at 532 nm. Moreover, they also preserve the luminescence originated from naphthalimide and two-photon absorption (TPA) behaviour which can be observed under femtosecond laser pulses ranged from 750 to 870 nm. The broad-band optcial limiting properties of these compounds indicate that they can be potentially applicated in optical limiting materials.