The title compound [N(CH 3) 4] 4 [H 5PMo 5V 9O 42 ] ·3.5H 2O was synthesized by hydrothermal method and its structure was determined with single crystal X ray analysis. The cluster anion is a bicapped Keggin poly...
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The title compound [N(CH 3) 4] 4 [H 5PMo 5V 9O 42 ] ·3.5H 2O was synthesized by hydrothermal method and its structure was determined with single crystal X ray analysis. The cluster anion is a bicapped Keggin polyanion, two vanadium atoms are distributed at two capping metal atom positions. The crystal is monoclinic, space group C2/c with a=1.284 8(4) nm, b=2.366 4(4) nm, c=2.113 6(4) nm, β= 90.69(2)° , V=6.425(4) nm 3, Z=4, D c=2.07 g\5cm -3 , R=0.066, R w=0.069, S=1.33, \{(Δ/σ) max =\}0 04, \{(Δρ) max =\}91 e·nm -3 .
specific lipase(PSL) catalyzed glycerolysis of lard was performed in microemulsions containing sodium bis(2 ethylhexyl) sulfosuccinate(AOT) and a combination of water and glycerol as the polar components. The effects ...
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specific lipase(PSL) catalyzed glycerolysis of lard was performed in microemulsions containing sodium bis(2 ethylhexyl) sulfosuccinate(AOT) and a combination of water and glycerol as the polar components. The effects of reaction conditions and system parameters on the yield of monofattyacylglycerols have been investigated and the optimum conditions of syntheses of monofattyacylglycerols were established. The reactions were carried out at 34 ℃, iso octane being the best hydrocarbon. The other optima were established as follows: pH, 7 0; water content(in mass % of the system), 0 8; AOT content 5%; glycerol content 2 5%, and the monofattyacylglycerols yield herein was 17 3%. Maximum yield of monofattyacylglycerols is obtained at optimum molar ratio of (water+glycerol)/surfactant 6 3, which corresponds to droplet size of ca. 7 2 nm.
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