Synthesis and Structural Characterization of ... - Jacobs University

More documents

Recommendations

Info

Chapter 3 Published Results Table 3.2. Average Ln–O Bond Lengths in Å [Ln 2 (H 2 O) 10 W 22 O 72 (OH) 2 ] 8− (La (1), Ce (2), Tb (3) Dy (4), Ho (5), Er (6), Tm (7) ,Yb (8), Lu (9), Y (10)) Ln Average Ln–O(W) Average Ln–OH 2 La (1) 2.551(15) 2.562(18) Ce (2) 2.523(11) 2.533(12) Tb (3) 2.324(13) 2.337(15) Dy (4) 2.382(10) 2.388(12) Ho (5) 2.339(11) 2.388(12) Er (6) 2.36(3) 2.33(4) Tm (7) 2.310(11) 2.350(11) Yb (8) 2.302(8) 2.344(8) Lu (9) 2.301(11) 2.328(12) Y (10) 2.339(7) 2.361(7) The undecatungstate subunit {W 11 }, two of which comprise the {W 22 } fragment in 1–10, can be considered an assembly of four distinct “building blocks”, see Figure 3.5: - One tetratungstate {W 4 } fragment (light blue in Figure 3.5) formed from four edgeshared WO 6 octahedra connected via a μ 4 -oxo bridge. This tetratungstate fragment can be viewed as a dilacunary form of the Lindqvist structure. 1 - One tritungstate {W 3 } fragment (green in Figure 3.5) formed from three edge-shared WO 6 octahedra connected via a μ 3 -hydroxo bridge (vide infra). This fragment can be viewed as a single “triad” of the well-known Keggin or Wells-Dawson ions. 1 - Two ditungstate {W 2 } fragments (red in Figure 3.5), each formed from two edgeshared WO 6 octahedra which are corner-sharing on one side. This undecatungstate fragment {W 11 } was first reported by Fuchs in 1988. 17 Here we report on the lanthanide capped 22-isopolytungstate {W 22 }, which represents two {W 11 } fragments fused via two W–O–W’ bridges (see Figure 3.5). 63
Chapter 3 Published Results {W 4 } subunit {W 3 } subunit {W 2 } subunits {W 11 } unit 2 x {W 11 } {W 22 } isopolyanion fragment of 1–10 Figure 3.5. Polyhedral representation of the {W 22 } unit of 1–10 which is composed of two {W 11 } half-units. The latter are composed of di-, tri- and tetrameric tungsten-oxo building blocks shown in different color: {W 4 } (light blue), {W 3 } (green), {W 2 } (red). Recently Cronin et al. reported on {W 36 } which is a cyclic trimer of {W 11 } linked via three extra WO 6 bridges and stabilized by a central potassium ion. 18 Figure 3.6 summarizes the three isopolytungstate structures {W 11 }, {W 36 } and {W 22 } and the respective formation conditions. The {W 22 } isopolytungstate as such offers two tridentate ligand sites, which are 64
Page 1 and 2:
Synthesis and Structural Characteri
Page 3 and 4:
Amal H. Ismail Ph.D. Thesis Acknowl
Page 5 and 6:
Amal H. Ismail Ph.D. Thesis Abstrac
Page 7 and 8:
Amal H. Ismail Ph.D. Thesis 1.6.1 P
Page 9 and 10:
Amal H. Ismail Ph.D. Thesis 3.B.1.2
Page 11 and 12:
Amal H. Ismail Ph.D. Thesis 5.B.2.
Page 13 and 14:
Amal H. Ismail Ph.D. Thesis Figure
Page 15 and 16:
Amal H. Ismail Ph.D. Thesis (pink);
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Amal H. Ismail Ph.D. Thesis List of
Page 23 and 24:
Amal H. Ismail Ph.D. Thesis K 8 Cs
Page 25 and 26:
Chapter 1 Introduction proposed a s
Page 27 and 28:
Chapter 1 Introduction A or B. At s
Page 29 and 30:
Chapter 1 Introduction c) [(H 2 )W
Page 31 and 32:
Chapter 1 Introduction by protonati
Page 33 and 34:
Chapter 1 Introduction structures;
Page 35 and 36: Chapter 1 Introduction mono-, di-,
Page 37 and 38: Chapter 1 Introduction Removal of t
Page 39 and 40: Chapter 1 Introduction α-[P 2 W 18
Page 41 and 42: Chapter 1 Introduction Figure 1.10
Page 43 and 44: Chapter 1 Introduction In general,
Page 45 and 46: Chapter 1 Introduction 1.6.1 Photoc
Page 47 and 48: Chapter 1 Introduction dioxygen is
Page 49 and 50: Chapter 1 Introduction 1.7 Lanthani
Page 51 and 52: Chapter 1 Introduction ligand for o
Page 53 and 54: Chapter 1 Introduction [Gd 8 As 12
Page 55 and 56: Chapter 1 Introduction Recently, we
Page 57 and 58: Chapter 1 Introduction P 2 W 16 O 5
Page 59 and 60: Chapter 1 Introduction [7] L. C. Pa
Page 61 and 62: Chapter 1 Introduction Malacria, C.
Page 63 and 64: Chapter 1 Introduction [55] B. Nohr
Page 65 and 66: Chapter 2 Experimental 2.2 Instrume
Page 67 and 68: Chapter 2 Experimental 2.3.2 Synthe
Page 69 and 70: Chapter 2 Experimental 2.3.8 Synthe
Page 71 and 72: Chapter 2 Experimental 2.4 Referenc
Page 73 and 74: Chapter 3 Published Results general
Page 75 and 76: Chapter 3 Published Results 2.5 mL
Page 77 and 78: Chapter 3 Published Results Na 8 [T
Page 79 and 80: Chapter 3 Published Results matrix
Page 81 and 82: Chapter 3 Published Results 3.A.1.4
Page 83 and 84: Chapter 3 Published Results [H 2 W
Page 85: Chapter 3 Published Results and one
Page 89 and 90: Chapter 3 Published Results We also
Page 91 and 92: Chapter 3 Published Results Figure
Page 93 and 94: Chapter 3 Published Results We trie
Page 95 and 96: Chapter 3 Published Results M. T. P
Page 97 and 98: Chapter 3 Published Results 72.936(
Page 99 and 100: Chapter 3 Published Results La, Ce,
Page 101 and 102: Chapter 3 Published Results Na 8 Eu
Page 103 and 104: Chapter 3 Published Results Table 3
Page 107 and 108: Chapter 3 Published Results Polyani
Page 109 and 110: Chapter 3 Published Results [LnW 10
Page 111 and 112: Chapter 3 Published Results analogu
Page 113 and 114: Chapter 3 Published Results We also
Page 115 and 116: Chapter 3 Published Results example
Page 117 and 118: Chapter 3 Published Results 1737; q
Page 119 and 120: Chapter 3 Published Results 3.B. La
Page 121 and 122: Chapter 3 Published Results expecte
Page 123 and 124: Chapter 3 Published Results 3.B.1.3
Page 127 and 128: Chapter 3 Published Results differe
Page 133 and 134: Chapter 3 Published Results Acta 20
Page 135 and 136: Chapter 3 Published Results Chem.,
Page 137 and 138:
Chapter 3 Unpublished Results bond
Page 139 and 140:
Chapter 3 Unpublished Results lanth
Page 141 and 142:
Chapter 3 Unpublished Results Na 10
Page 143 and 144:
Chapter 3 Unpublished Results Figur
Page 145 and 146:
Chapter 3 Unpublished Results 3.B.2
Page 147 and 148:
Chapter 3 Unpublished Results In po
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Chapter 3 Unpublished Results (a) (
Page 155 and 156:
Chapter 3 Unpublished Results param
Page 157 and 158:
Chapter 3 Unpublished Results G.-F.
Page 159 and 160:
Chapter 3 Unpublished Results Here
Page 161 and 162:
Page 163 and 164:
Chapter 3 Unpublished Results This
Page 165 and 166:
Chapter 3 Unpublished Results techn
Page 167 and 168:
Page 169 and 170:
Chapter 4 Unpublished Results Chapt
Page 171 and 172:
Chapter 4 Unpublished Results The c
Page 173 and 174:
Chapter 4 Unpublished Results iron(
Page 175 and 176:
Chapter 4 Unpublished Results 4.4.
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Chapter 4 Unpublished Results Therm
Page 183 and 184:
Chapter 4 Unpublished Results This
Page 185 and 186:
Chapter 4 Unpublished Results 4.6.
Page 187 and 188:
Chapter 4 Unpublished Results S. Ba
Page 189 and 190:
Chapter 5 Published Results Also te
Page 191 and 192:
Chapter 5 Published Results 5.A.1.3
Page 193 and 194:
Chapter 5 Published Results Table 5
Page 195 and 196:
Chapter 5 Published Results [HTe 2
Page 197 and 198:
Chapter 5 Published Results face-sh
Page 199 and 200:
Chapter 5 Published Results polymol
Page 201 and 202:
Chapter 5 Published Results Each of
Page 203 and 204:
Chapter 5 Published Results Althoug
Page 205 and 206:
Chapter 5 Published Results Polyako
Page 207 and 208:
Chapter 5 Unpublished Results 5.A.2
Page 209 and 210:
Chapter 5 Unpublished Results 610(m
Page 211 and 212:
Chapter 5 Unpublished Results 5.A.2
Page 213 and 214:
Page 215 and 216:
Chapter 5 Unpublished Results {Mo 6
Page 217 and 218:
Chapter 5 Unpublished Results compo
Page 219 and 220:
Chapter 5 Unpublished Results [3] a
Page 221 and 222:
Chapter 5 Published Results 5.B. Tr
Page 223 and 224:
Chapter 5 Published Results H 2 O)
Page 225 and 226:
Chapter 5 Published Results 5.B.3.
Page 227 and 228:
Chapter 5 Published Results Each Ke
Page 229 and 230:
Chapter 5 Published Results GeW 9 O
Page 231 and 232:
Chapter 5 Published Results the axi
Page 233 and 234:
Chapter 5 Published Results The man
Page 235 and 236:
Chapter 5 Published Results 5.B.6.
Page 237 and 238:
Chapter 5 Published Results [19] L.
Page 239:
Amal H. Ismail Ph.D. Thesis Appendi
show all

Synthesis and Structural Characterization of ... - Jacobs University

Create successful ePaper yourself

Delete template?

Save as template?