具有大型三维通道,永久多孔且化学稳定的金属有机骨架的合成为催化和分离等领域提供了新的机遇。两个接头(L1 = 4,4',4'',4'''-([[1,1'-联苯] -3,3',5,5'-四基四(乙炔-2,1-二基))四苯甲酸,L2 = 4,4',4'',4'''-(py-1,3,6,8-四基四(乙炔-2,1-二基))四苯甲酸)具有相同的连通性和尺寸,但具有明显的扭转弹性。由此形成了固溶体材料[Zr 6 O 4(OH)4(L1)2.6(L2)0.4 ]⋅(溶剂)x,该材料具有三维晶体永久孔隙率,表面积超过4000 m 2个 g -1浸入水中后仍然存在。对于由单独的单个接头制成的同构相,这些属性是不可访问的。
具有大型三维通道,永久多孔且化学稳定的金属有机骨架的合成为催化和分离等领域提供了新的机遇。两个接头(L1 = 4,4',4'',4'''-([[1,1'-联苯] -3,3',5,5'-四基四(乙炔-2,1-二基))四苯甲酸,L2 = 4,4',4'',4'''-(py-1,3,6,8-四基四(乙炔-2,1-二基))四苯甲酸)具有相同的连通性和尺寸,但具有明显的扭转弹性。由此形成了固溶体材料[Zr 6 O 4(OH)4(L1)2.6(L2)0.4 ]⋅(溶剂)x,该材料具有三维晶体永久孔隙率,表面积超过4000 m 2个 g -1浸入水中后仍然存在。对于由单独的单个接头制成的同构相,这些属性是不可访问的。
Photophysical properties of 1,3,6,8-tetrakis(arylethynyl)pyrenes with donor or acceptor substituents: their fluorescence solvatochromism and lightfastness
We prepared a series of 1,3,6,8-tetrakis(arylethynyl)pyrenes with donor or acceptor substituents and investigated their photophysical properties. Solvent polarity hardly affected on the UV/vis spectra of all of the tetrakis(arylethynyl)pyrenes used in this study. On the other hand, electron-donating groups, NMe2 and NPh2 groups imparted fluorescence solvatochromicity to the skeleton by intramolecular