Chapter 4 - Jacobs University

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<strong>Chapter</strong> 9 Unpublished Results 9.2.3.4 Conclusion We have isolated a dimeric yttrium containing polyoxometalate and we analyzed the compound by single crystal XRD, IR, NMR and TGA. The final compound was synthesized in a one-pot procedure in simple aqueous conditions and it crystallizes in monoclinic crystal system (space group P2 1 /c). 191
<strong>Chapter</strong> 9 Unpublished Results 9.2.4 Synthesis of K 12 [{Y(CH 3 COO)GeW 11 O 39 } 2 ]·37H 2 O (18a) A 1.313 g (0.4 mmol) sample of K 8 [a-GeW 11 O 39 ]∙12H 2 O was dissolved in 25 mL of 1M KCH 3 COO (4.8 pH) and then reacted with 0.1344 g (0.4 mmol) YCl 3 ∙6H 2 O. This solution was heated to 80 °C for 30 minutes. After the heating was over, the solution was allowed to cool to room temperature, and then filtered. After heating, the solution was then filtered in hot. The resulting solution was layered with 0.5 ml of 1 M CsCl. The filtrate was allowed to evaporate in an open beaker at room temperature. After one day a white crystalline product started to appear. After that, the evaporation was allowed to continue until the solution level approached the solid product which was then collected by filtration and air dried. Yield: 1.006 g. (37%). IR : 1622(s), 1533(s), 1457(s), 952(s), 881(m), 814(m), 683(m), 526(m), 469(w), 449(w) cm -1 . 75 70 65 60 55 50 %Transmittance 45 40 35 30 25 20 15 10 5 -0 1800 1600 1400 1200 Wavenumbers (cm-1) 1000 800 600 Figure 9.40 FTIR spectrum of 18a. 192
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Synthesis, Structure and Properties
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"The greatest book of philosophy, w
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system, space group I4/m, unit cell
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Acknowledgements The accomplishment
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teaching, and Professor Maravanji S
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2.1.2 Single crystal X-ray diffract
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5.5 Conclusion…………………
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9.1.6.1 Results and discussion…
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9.3.5 Synthesis of K 12 [Hf 4 (µ 2
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Crespo………………………
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Figure 5.4 ORTEP view of the asymme
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Figure 9.6 31 P NMR of 7a in H 2 O/
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Figure 9.34 TGA spectrum of 17a…
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Figure 9.62 FTIR spectrum of 23a…
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Table 9.6 Crystal data and structur
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Chapter 1 Introduction heteropolyan
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Chapter 1 Introduction 1.3 Structur
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Chapter 1 Introduction C) Keggin a-
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Chapter 1 Introduction shows no suc
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Chapter 1 Introduction α-[P 2 W 18
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Chapter 1 Introduction Figure 1.7 B
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Chapter 1 Introduction [P 2 W 18 O
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Chapter 1 Introduction 1.5.3 Medici
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Chapter 1 Introduction (17) Evans,
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Chapter 1 Introduction (48) Mizuno,
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Chapter 1 Introduction (84) Isabell
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Chapter 2 were block-diagonal least
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Chapter 2 Experimental 2.2.3 Synthe
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Chapter 2 Experimental 2.2.7 Synthe
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Chapter 2 Experimental 2.2.11 Synth
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Chapter 2 Experimental 2.3Reference
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Chapter 3 The Wheel-Shaped Cu 20 in
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Chapter 3 The Wheel-Shaped Cu 20 3.
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Chapter 3 The Wheel-Shaped Cu 20 Fi
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Chapter 3 The Wheel-Shaped Cu 20 Cu
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Chapter 4 16-Iron Metal Center Nano
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Chapter 6 U-peroxo-Polyoxometalate
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Appendix
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6. “Two Iron-Containing Tungstoge
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Appendix
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