TY - JOUR
T1 - Non-silica-based mesostructured material. 2 Synthesis of hexagonal superstructure consisting of 11-tungstophosphate anions and dodecyltrimethylammonium cations
AU - Taguchi, Akira
AU - Abe, Takayuki
AU - Iwamoto, Masakazu
N1 - Funding Information:
This work was partly supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture of Japan, and a Grant-in-Aid for Japan Society for the Promotion of Science Fellows.
PY - 1998/5
Y1 - 1998/5
N2 - A new mesostructured material (denoted WP) constructed from lacunary Keggin anions PW11O7-39 and surfactant cations CH3(CH2)11N(CH3)+ 3 has been hydrothermally synthesized. The optimum conditions for the synthesis of WP were 1.0 Na2WO4 · 2H2O:0.5 H3PO4:1.0 CH3(CH2)11N(CH3)3Br:83.3 H2O, pH 8.0-8.5, 403 K, and 6 h. WP could also be synthesized by using H3PW12O40 · nH2O heteropoly acid as a starting material under similar reaction conditions. The XRD and TEM measurements revealed that WP has a regular hexagonal superstructure. The dimensions of the unit cell determined by XRD were a = b = 3.85 and c = 1.57 nm. On the basis of FT-IR, 31P MAS NMR, TG-DTA, ICP, and elemental analysis studies, the chemical formula of WP was determined to be [CH3(CH2)11 N(CH3)3]6NaPW11O39 · 5.7H2O. A model with the wall of lacunary Keggin anions PW11O7-39 and the micelles of surfactant cations has been proposed.
AB - A new mesostructured material (denoted WP) constructed from lacunary Keggin anions PW11O7-39 and surfactant cations CH3(CH2)11N(CH3)+ 3 has been hydrothermally synthesized. The optimum conditions for the synthesis of WP were 1.0 Na2WO4 · 2H2O:0.5 H3PO4:1.0 CH3(CH2)11N(CH3)3Br:83.3 H2O, pH 8.0-8.5, 403 K, and 6 h. WP could also be synthesized by using H3PW12O40 · nH2O heteropoly acid as a starting material under similar reaction conditions. The XRD and TEM measurements revealed that WP has a regular hexagonal superstructure. The dimensions of the unit cell determined by XRD were a = b = 3.85 and c = 1.57 nm. On the basis of FT-IR, 31P MAS NMR, TG-DTA, ICP, and elemental analysis studies, the chemical formula of WP was determined to be [CH3(CH2)11 N(CH3)3]6NaPW11O39 · 5.7H2O. A model with the wall of lacunary Keggin anions PW11O7-39 and the micelles of surfactant cations has been proposed.
KW - Hexagonal structure
KW - Hydrothermal synthesis
KW - Mesostructured material
KW - PWO heteropoly anion
KW - Template effect
UR - http://www.scopus.com/inward/record.url?scp=0032068351&partnerID=8YFLogxK
U2 - 10.1016/S1387-1811(98)00127-9
DO - 10.1016/S1387-1811(98)00127-9
M3 - 学術論文
AN - SCOPUS:0032068351
SN - 1387-1811
VL - 21
SP - 387
EP - 393
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
IS - 4-6
ER -