The layered zirconium glycine-N,N-dimethylphosphonate (ZGDMP) was prepared and the intercalation behavior of n-alkylmonoamines was investigated. The X-ray diffraction powder patterns demonstrated that the n-alkylmonoa...The layered zirconium glycine-N,N-dimethylphosphonate (ZGDMP) was prepared and the intercalation behavior of n-alkylmonoamines was investigated. The X-ray diffraction powder patterns demonstrated that the n-alkylmonoamines were taken up in one step and there were no other intermediate phases. The interlayer distance correlated with the number of carbon atoms of the n-alkylmonoamine chains. The n-alkylmonoamines were intercalated into ZGDMP in such a way that the protons of the interlayer -CO2H groups were replaced by the terminal -NH3+ of the protonated n-alkylmonoamines. The intercalated n-alkylmonoamines were released from the lamellar ZGDMP at temperature of 150 to 250 ℃.展开更多
In order to improve the property of sulfonated poly(pathalazinone ether ketone)(SPPEK)membrane of high sulfonation degree,proton conductor zirconium tricarboxybutylphosphonate[Zr(PBTC)]was used and incorporated into S...In order to improve the property of sulfonated poly(pathalazinone ether ketone)(SPPEK)membrane of high sulfonation degree,proton conductor zirconium tricarboxybutylphosphonate[Zr(PBTC)]was used and incorporated into SPPEK to prepare Zr(PBTC)/SPPEK composite membranes for direct methanol fuel cell(DMFC).The results showed that the additive could reduce the water swelling and methanol permeability of membranes efficiently without sacrificing its conductivity.DMFC single cell performance demonstrated that the 30%(mass)Zr(PBTC)/SPPEK composite membrane was better than the pristine SPPEK membrane for its reduced swelling and consequently improved dimensional stability.展开更多
The crystalline chiral zirconium phosphonates with α, γ-type structure, formulated as Zr(PO 4) 0.6(HPO 4) 0.1(O 3PCH 2NHC 4H 7COO-) 0.55(O 3PCH 2NHC 3H 7COOH) 0.55F 0.55·H 2O(mix-ZrPMP, [α] 25 D=-36°) and...The crystalline chiral zirconium phosphonates with α, γ-type structure, formulated as Zr(PO 4) 0.6(HPO 4) 0.1(O 3PCH 2NHC 4H 7COO-) 0.55(O 3PCH 2NHC 3H 7COOH) 0.55F 0.55·H 2O(mix-ZrPMP, [α] 25 D=-36°) and Zr(PO 4) 0.6(HPO 4) 0.1(O 3PCH 2NHCH 2SC 2H 3COO-) 0.55(O 3PCH 2NHCH 2S-C 2H 3COOH) 0.55F 0.55·2.0H 2O(mix-ZrPMT, [α] 25 D=-39°), were obtained in situ by reaction of N-phosphonomethyl-L-proline(H 3PMP) and N-phosphonomethyl-1,3-thiazolidine-4-carboxylic acid(H 3PMTA) with ZrOCl 2·8H 2O in the presence of HF at 90 ℃, respectively. The heterocycle thiazolidine was integrated onto metal-organic frameworks. Of mix-ZrPMP and mix-ZrPMT, the CO 2H, CO- 2 and NH+ groups are remained in layered structures of mixed-type.展开更多
Zirconium 1,4-butylenediphosphonate[Zr(BDPA)] multilayers on a 3-mercaptopropylphosphonate-coated gold electrode were prepared by the conventional layer-by-layer method.The stability of the Zr(BDPA) multilayers in dif...Zirconium 1,4-butylenediphosphonate[Zr(BDPA)] multilayers on a 3-mercaptopropylphosphonate-coated gold electrode were prepared by the conventional layer-by-layer method.The stability of the Zr(BDPA) multilayers in different supporting electrolyte solutions was studied by cyclic voltammetry (CV) and X-ray photoelectron spec-troscopy(XPS) measurements.The results show that the Zr(BDPA) multilayers are very stable in 0.2 mol·L-1 KCl,0.2 mol·L-1 KNO3 and low concentration phosphate buffer solution(PBS) with low pH values(c≤0.05 mol·L-1,pH≤ 6.8).While in high concentration 0.2 mol·L-1 PBS(pH=5.2～7.4),the Zr(BDPA) multilayers will be partially desorbed within two days,possibly due to the formation of more stable zirconium phosphate.展开更多
文摘The layered zirconium glycine-N,N-dimethylphosphonate (ZGDMP) was prepared and the intercalation behavior of n-alkylmonoamines was investigated. The X-ray diffraction powder patterns demonstrated that the n-alkylmonoamines were taken up in one step and there were no other intermediate phases. The interlayer distance correlated with the number of carbon atoms of the n-alkylmonoamine chains. The n-alkylmonoamines were intercalated into ZGDMP in such a way that the protons of the interlayer -CO2H groups were replaced by the terminal -NH3+ of the protonated n-alkylmonoamines. The intercalated n-alkylmonoamines were released from the lamellar ZGDMP at temperature of 150 to 250 ℃.
文摘In order to improve the property of sulfonated poly(pathalazinone ether ketone)(SPPEK)membrane of high sulfonation degree,proton conductor zirconium tricarboxybutylphosphonate[Zr(PBTC)]was used and incorporated into SPPEK to prepare Zr(PBTC)/SPPEK composite membranes for direct methanol fuel cell(DMFC).The results showed that the additive could reduce the water swelling and methanol permeability of membranes efficiently without sacrificing its conductivity.DMFC single cell performance demonstrated that the 30%(mass)Zr(PBTC)/SPPEK composite membrane was better than the pristine SPPEK membrane for its reduced swelling and consequently improved dimensional stability.
文摘The crystalline chiral zirconium phosphonates with α, γ-type structure, formulated as Zr(PO 4) 0.6(HPO 4) 0.1(O 3PCH 2NHC 4H 7COO-) 0.55(O 3PCH 2NHC 3H 7COOH) 0.55F 0.55·H 2O(mix-ZrPMP, [α] 25 D=-36°) and Zr(PO 4) 0.6(HPO 4) 0.1(O 3PCH 2NHCH 2SC 2H 3COO-) 0.55(O 3PCH 2NHCH 2S-C 2H 3COOH) 0.55F 0.55·2.0H 2O(mix-ZrPMT, [α] 25 D=-39°), were obtained in situ by reaction of N-phosphonomethyl-L-proline(H 3PMP) and N-phosphonomethyl-1,3-thiazolidine-4-carboxylic acid(H 3PMTA) with ZrOCl 2·8H 2O in the presence of HF at 90 ℃, respectively. The heterocycle thiazolidine was integrated onto metal-organic frameworks. Of mix-ZrPMP and mix-ZrPMT, the CO 2H, CO- 2 and NH+ groups are remained in layered structures of mixed-type.
文摘Zirconium 1,4-butylenediphosphonate[Zr(BDPA)] multilayers on a 3-mercaptopropylphosphonate-coated gold electrode were prepared by the conventional layer-by-layer method.The stability of the Zr(BDPA) multilayers in different supporting electrolyte solutions was studied by cyclic voltammetry (CV) and X-ray photoelectron spec-troscopy(XPS) measurements.The results show that the Zr(BDPA) multilayers are very stable in 0.2 mol·L-1 KCl,0.2 mol·L-1 KNO3 and low concentration phosphate buffer solution(PBS) with low pH values(c≤0.05 mol·L-1,pH≤ 6.8).While in high concentration 0.2 mol·L-1 PBS(pH=5.2～7.4),the Zr(BDPA) multilayers will be partially desorbed within two days,possibly due to the formation of more stable zirconium phosphate.
