| On the basis of molecular design and assembly, a series of novel organic-inorganic hybrid polyoxometalates based on Lindqvist polyanions or bicapped pseudo-Keggin polyanions and transition metals were successfully synthesized by the ambient-temperature aqueous solution and hydrothermal technique. These compounds were character by X-ray crystallography, spectroscopic and thermal properties.â… . Three organic-inorganic hybrid compounds based on Lindqvist polyanions.1. Na[Cu(1,3-pda)2]3[HNb6O19]·3H2O: Rhombohedral system, R -3c space group, a =14.927(4)(?), b = 14.927(4)(?), c = 36.940(18) (?),γ= 120°, V= 7128(4)(?), Z= 6, R1 = 0.0626, wR2 = 0.1790;2. {[V2W4O19{Cu(2,2'-bipy)2}2]·(4,4'-bipy)}n: triclinic system, P-1 space group, a = 10.6996(10)(?), b = 11.0783(10)(?), c = 12.6794(12)(?),α= 72.608(2)°,β= 77.350(2)°,γ= 71.3450(10)°, V= 1346.2(2)(?), Z = 1, R1 = 0.0401, wR2 = 0.0990;3. [Co(2,2'-bipy)3][W6O19]·H2O: cubic system, P213 space group, a = 15.7754(4)(?), b = 15.7754(4)(?), c = 15.7754(4)(?),β= 90°, V= 3925.92(17)(?), Z= 4, R1 = 0.0341, wR2 = 0.0808;â…¡. The organic-inorganic composites based on bicapped pseudo-Keggin polyanion4. Na(H2O)5.5[Cu(2,2'-bipy)3]2[Cu(enMe)2H2O]6H[Cu(enMe)2{PMo8â…¥V4RO40(Vâ…£O)2C u(enMe)2}]6·3H2O: Trigonal system, P-3 space group, a = 33.4716(14)(?), b = 33.4716(14)(?), c = 12.6911(11)(?),γ= 120°, V= 12313.5(13)(?), Z= 1, R1 = 0.0921,wR2 = 0.2336;5. [Cuâ… (phen)2]2 [Cuâ…¡(enMe)2(H2O)]6 [PMo8â…¥V4â…£O40(Vâ…£O)2]2·H2O: triclinic system, P-1 space group, a = 12.5639(12)(?), b = 18.0617(18)(?), c = 20.306(2)(?),α= 67.5120(10)°.β= 85.1340(10)°,γ= 87.6030(10)°, V = 4241.9(7)(?), Z = 1, R1 = 0.0795, wR2 = 0.2516; 6. Na[PMo8â…¥V4â…£O40(Vâ…¤O)2{Cu(en)2}2]·H2O: monoclinic system, P21/c space group, a = 13.919(2)(?), b= 13.5741(19)(?), c = 19.438(3) (?),β= 94.780(3)°, V= 3659.8(13)(?), Z = 2,R1 = 0.0809, wR2 = 0.2398;7. Na[PMo8â…¥V4â…£O40(Vâ…¤O)2{Cu(enMe)2}2]·2H2O: monoclinic system. P21/c space group, a = 13.937(2) (?), b = 13.5930 (?), c = 19.471(3) (?),β= 94.500(3)°, V = 3677.33(127)(?), Z = 2,R1=0.0885,wR2 = 0.2481;â…¢. Iso-polyoxovanadate8. [Cu( enMe)2]3.5[V6â…¤V10â…£O38(Cl)]·1.5H2O: monoclinic system. P21/n space group, a = 12.6302 (5) (?), b =25.5997 (11) (?), c = 21.5070 (9)(?),β= 90.7380 (10)°, V = 6953.3(5)(?), Z= 4, R1 = 0.0545. wR2 = 0.1566;â…£. The supported polyoxometalates based on Keggin polyanion:9. [Ni(2,2'-bipy)3]1.5[SiW12O40Ni(2,2'-bipy)2(H2O)](OH): monoclinic system, C2/c space group, a = 46.677(4) (?), b = 14.3444(13) (?), c = 26.020(2) (?),β= 92.14°, V = 17422(3)(?), Z= 8, R1=0.0464. wR2 = 0.1075。... |
PDF Full Text Request