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Two novel zeotype crystals, K_4[Cr_3O(H_2O)_3(OOCH)_6]_2[P_2W_ 18 O_ 62 ]·9.5H_2O(1) and K_4[Cr_3O(H_2O)_3·(OOCH)_6][H_3P_2W_ 17 Co(H_2O)O_ 61 ]·20H_2O(2), were synthesized and their structures were determined using X-ray single crystal diffraction. Crystal data: C_ 12 H_ 43 O_ 103.5 K_4Cr_6P_2W_ 18 (1), hexagonal P6(3)/m, a =1.5895(2) nm, b=1.5895(2) nm, c=2.1620(4) nm, α=90°, β=90°, γ=120°, V=4.7305(13) nm~3, Z=2, R_1=0.0726, wR_2=0.1542; C_6H_ 57 O_ 98 K_4Cr_3CoP_2W_ 17 (2), hexagonal %P%6(3)/mmc, a = 1.61328(3) nm, b=1.61328(3) nm, c=2.06613(9) nm, α=90°, β=90°, γ=120°, V=4.6570(2) nm~3, Z=2, R_1=0.0377, wR_2=0.1070. These crystals were characterized using elemental analysis, IR, TG-DTA, and XRD. It was found that the polyoxometalate anions maintained Wells-Dawson structure for crystal 1 and lacunary Wells-Dawson structure for crystal 2. Thermal analysis showed that crystal 1 lost the water of crystallization at 132 ℃, whereas crystal 2 lost the water of crystallization at 100 ℃. Crystal 1 could reversibly desorb and adsorb water molecules and its crystal structure could be restored after re-adsorbing the water molecules. It was also found from the XRD patterns that the void size of crystal 2 is smaller compared with that of crystal 1, which is attributed to the higher anion charges.
Two novel zeotype crystals K_4 [Cr_3O (H_2O) _3 (OOCH) _6] _2 [P_2W_ 18 O_62] · 9.5H_2O (1) and K_4 [Cr_3O (H_2O) _3 · (OOCH) _6] [H_3P_2W_17Co (H_2O ) O_61] · 20H_2O (2), synthesized and their structures were determined using X-ray single crystal diffraction. Crystal data: C_12H_43O_103.5K_4Cr_6P_2W_18 (1), hexagonal P6 (3) / m, a = 1.5895 (2) nm, b = 1.5895 (2) nm, c = 2.1620 (4) nm, α = 90 °, β = 90 °, γ = 120 °, , R_1 = 0.0726, wR_2 = 0.1542; C_6H_57 O_ 98 K_4Cr_3CoP_2W_17 (2), hexagonal% P% 6 (3) / mmc, a = 1.61328 (3) nm, b = 1.61328 (3) nm, c = 2.06613 These crystals were characterized using elemental analysis, IR = 9077, β = 90 °, γ = 120 °, V = 4.6570 (2) nm ~ 3, Z = 2, R_1 = 0.0377 and wR_2 = 0.1070. , TG-DTA, and XRD. It was found that the polyoxometalate anions maintained Wells-Dawson structure for crystal 1 and lacunary Wells-Dawson structure for crystal 2. Thermal analysis showed that crystal 1 lost the water of crystallization at 132 ° C., while crystal 2 lost the water of crystalliz ation at 100 ° C Crystal 1 could be reversibly desorb and adsorb water molecules and its crystal structure could be restored after re-adsorbing the water molecules. It was also found from the XRD patterns that the void size of crystal 2 is smaller than with that of crystal 1, which is attributed to the higher anion charges.