Organic acid radical-pillared hydrotalcites of the type of M6Al2（OH）16〔CnH2n+1COO-〕（M=Mg,Zn;n=13,17）have been successfully assembled by calcination of M6Al2（OH）16CO3·mH2O〕（M=Mg,Zn）and rehydration of Mg...Organic acid radical-pillared hydrotalcites of the type of M6Al2（OH）16〔CnH2n+1COO-〕（M=Mg,Zn;n=13,17）have been successfully assembled by calcination of M6Al2（OH）16CO3·mH2O〕（M=Mg,Zn）and rehydration of MgAlO and ZnAlO in tetradecylic acid solvent and stearic acid solvent respectively and characterized by IR and XRD.The experimental results show that the method of calcination-rehydration could be used to prepare the organic acid radical-pillared MAl-LKHs（M=Mg,Zn）which have good crystallinity,regular layered structure and large interlayer distance (d003(M6Al2（OH）16〔CnH2n+1COO-〕)=2.74nm（M=Zn,n=13）,2.90nm（M=Mg,n=13）,3.24nm（M=Zn,n=17）,3.22nm（M=Mg,n=17）.展开更多
Sebacate-intercalated hydrotalcite was prepared using Mg-Al layered double hydroxides (Mg-Al LDHs) as intercalation hosts and sebactate ion as interscalation gust by methods of ion exchange, one-step synthesis and cal...Sebacate-intercalated hydrotalcite was prepared using Mg-Al layered double hydroxides (Mg-Al LDHs) as intercalation hosts and sebactate ion as interscalation gust by methods of ion exchange, one-step synthesis and calcinations-rehydration and characterized by IR, XRD and TEM. The sebacate-pillared Mg-Al hydrotalcite with good crystallinity could be prepared by any one of the above mentioned methods. The interlayer distance for the pollared species varied slightly with synthetic method and reaction conditions.展开更多
Eu(Ⅲ) complexes with bipyO2 ligand were intercalated into the interlayer spacing of montmorillonite (MMT) by solid-solid ion exchanging and coordination reaction of bipyO2 with the Eu3+ ion existing in the interlayer...Eu(Ⅲ) complexes with bipyO2 ligand were intercalated into the interlayer spacing of montmorillonite (MMT) by solid-solid ion exchanging and coordination reaction of bipyO2 with the Eu3+ ion existing in the interlayer spacing of Eu-MMT at room temperature, respectively. The obtained luminescent supramolecular composite materials, Eu(bipyO2)4Cl2+-MMT and Eu(bipyO2)43+-MMT were characterized by elemental analysis, XRD and FTIR spectroscopy. At the same time, the luminescent properties of the materials were also studied. The results show that the intercalation assembly materials have regular layered structures and good luminescent properties. They emit characteristic red emissions of Eu3+ strongly under ultraviolet light excitation. The relative luminescence intensities of the unit mass of Eu3+ of intercalation assemblies are much better than that of the corresponding pure Eu3+ complex possibly due to the rigid layered structures of the materials and the supramolecular interaction between the host layers and the guest complex ions.展开更多
The extraction technology and stability and main composition of the red-brown pigment from Ramulus Uncariae Cun Uncis were studied.The result showed that the optimal technology was water as extractant, the proportion ...The extraction technology and stability and main composition of the red-brown pigment from Ramulus Uncariae Cun Uncis were studied.The result showed that the optimal technology was water as extractant, the proportion of material and extractant 1∶20(g/ml),the extract time of 1h in 60℃ and two times.The main composition of red-brown pigment from Ramulus Uncariae Cun Uncis was determined to be hydroxyanthraquinoneglycoside and flavonoid by chromatography separation and color-test and spectrum analysis.展开更多
文摘Organic acid radical-pillared hydrotalcites of the type of M6Al2（OH）16〔CnH2n+1COO-〕（M=Mg,Zn;n=13,17）have been successfully assembled by calcination of M6Al2（OH）16CO3·mH2O〕（M=Mg,Zn）and rehydration of MgAlO and ZnAlO in tetradecylic acid solvent and stearic acid solvent respectively and characterized by IR and XRD.The experimental results show that the method of calcination-rehydration could be used to prepare the organic acid radical-pillared MAl-LKHs（M=Mg,Zn）which have good crystallinity,regular layered structure and large interlayer distance (d003(M6Al2（OH）16〔CnH2n+1COO-〕)=2.74nm（M=Zn,n=13）,2.90nm（M=Mg,n=13）,3.24nm（M=Zn,n=17）,3.22nm（M=Mg,n=17）.
文摘Sebacate-intercalated hydrotalcite was prepared using Mg-Al layered double hydroxides (Mg-Al LDHs) as intercalation hosts and sebactate ion as interscalation gust by methods of ion exchange, one-step synthesis and calcinations-rehydration and characterized by IR, XRD and TEM. The sebacate-pillared Mg-Al hydrotalcite with good crystallinity could be prepared by any one of the above mentioned methods. The interlayer distance for the pollared species varied slightly with synthetic method and reaction conditions.
文摘Eu(Ⅲ) complexes with bipyO2 ligand were intercalated into the interlayer spacing of montmorillonite (MMT) by solid-solid ion exchanging and coordination reaction of bipyO2 with the Eu3+ ion existing in the interlayer spacing of Eu-MMT at room temperature, respectively. The obtained luminescent supramolecular composite materials, Eu(bipyO2)4Cl2+-MMT and Eu(bipyO2)43+-MMT were characterized by elemental analysis, XRD and FTIR spectroscopy. At the same time, the luminescent properties of the materials were also studied. The results show that the intercalation assembly materials have regular layered structures and good luminescent properties. They emit characteristic red emissions of Eu3+ strongly under ultraviolet light excitation. The relative luminescence intensities of the unit mass of Eu3+ of intercalation assemblies are much better than that of the corresponding pure Eu3+ complex possibly due to the rigid layered structures of the materials and the supramolecular interaction between the host layers and the guest complex ions.
文摘The extraction technology and stability and main composition of the red-brown pigment from Ramulus Uncariae Cun Uncis were studied.The result showed that the optimal technology was water as extractant, the proportion of material and extractant 1∶20(g/ml),the extract time of 1h in 60℃ and two times.The main composition of red-brown pigment from Ramulus Uncariae Cun Uncis was determined to be hydroxyanthraquinoneglycoside and flavonoid by chromatography separation and color-test and spectrum analysis.
