Incorporation of anions of Acid Red 114 dye （1,3-naphthalenedisulfonic acid, 8-[2-[3,3＇-dimethyl-4＇-[2-[4- [l（4-methylphenyl）sulfonyl]oxy] phenyl]diazenyl] [1,1＇-biphenyl]-4-yl]diazenyl]-7-hydroxy-, disodium sal...Incorporation of anions of Acid Red 114 dye （1,3-naphthalenedisulfonic acid, 8-[2-[3,3＇-dimethyl-4＇-[2-[4- [l（4-methylphenyl）sulfonyl]oxy] phenyl]diazenyl] [1,1＇-biphenyl]-4-yl]diazenyl]-7-hydroxy-, disodium salt） （denoted as NPDA） into ZnAl-layered double hydroxides （LDHs） has been carried out by an anion- exchange method in an effort to improve their thermal stability and light fastness. After intercalation of NPDA anions, the interlayer distance of the LDHs increases from 0.87 to 2.18 nm, confirming their incorporation into the interlayer galleries of the LDHs host. Infrared spectroscopy and thermogravimetric analysis revealed the presence of host-guest interactions between LDHs layers and NPDA anions. The thermal stability of NPDA and ZnAI-NPDA-LDHs was compared by thermogravimetric-differential ther- mal analysis, UV-visible spectroscopy and infrared spectroscopy. It was found that the thermal stability of NPDA anions was markedly improved by incorporation into the ZnA1-LDHs matrix, while the light fastness was also enhanced.展开更多
基金supported by National Natural Science Foundation of China
文摘Incorporation of anions of Acid Red 114 dye （1,3-naphthalenedisulfonic acid, 8-[2-[3,3＇-dimethyl-4＇-[2-[4- [l（4-methylphenyl）sulfonyl]oxy] phenyl]diazenyl] [1,1＇-biphenyl]-4-yl]diazenyl]-7-hydroxy-, disodium salt） （denoted as NPDA） into ZnAl-layered double hydroxides （LDHs） has been carried out by an anion- exchange method in an effort to improve their thermal stability and light fastness. After intercalation of NPDA anions, the interlayer distance of the LDHs increases from 0.87 to 2.18 nm, confirming their incorporation into the interlayer galleries of the LDHs host. Infrared spectroscopy and thermogravimetric analysis revealed the presence of host-guest interactions between LDHs layers and NPDA anions. The thermal stability of NPDA and ZnAI-NPDA-LDHs was compared by thermogravimetric-differential ther- mal analysis, UV-visible spectroscopy and infrared spectroscopy. It was found that the thermal stability of NPDA anions was markedly improved by incorporation into the ZnA1-LDHs matrix, while the light fastness was also enhanced.
