Full- or Half-Encapsulation of Sulfate Anion by a Tris(3-pyridylurea) Receptor: Effect of the Secondary Coordination Sphere

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	Full- or Half-Encapsulation of Sulfate Anion by a Tris(3-pyridylurea) Receptor: Effect of the Secondary Coordination Sphere
	Yang XJ(杨晓娟); Yang XJ(杨晓娟)
刊名	Inorganic Chemistry
	2009
卷号	48 期号:21 页码:10249-10256
ISSN号	0020-1669
通讯作者	吴彪 ; Christoph Janiak ; 杨晓娟
中文摘要	Self-assembly of the [Fe(DABP)3]SO4 (DABP = 5,50-diamino-2,20-bipyridine) or [Fe(bipy)3]SO4 (bipy = 2,20-bipyridine) complexwith a tripodal tris(3-pyridylurea) ligand (L) results in a layered structure that includes a sulfate anion in the cleft of one L molecule. The two compounds, [Fe(DABP)3][SO4⊂L] 3 10H2O (2) and [Fe(bipy)3][SO4⊂L] 3 9H2O (3), show very similar sheets formed by the anionic units [SO4⊂L]2- and cationic building blocks ([Fe(DABP)3]2þ or [Fe(bipy)3]2þ). However, there are different water clusters that link the adjacent layers in the two products, that is, water parallelograms and quasi “water cubes” in 2 versus single water molecules, water dimers, and hexamers in 3. The half-encapsulation of sulfate by a single L molecule contrastswith the previously reported full-encapsulation of the sulfate ion by two Lmolecules in [M(H2O)6][SO4⊂L2] (1). This different anion encapsulation is traced to the hydrogen-acceptor properties of the pyridyl groups of L together with the hydrogen-bonding properties of the cation secondary coordination sphere for a solid-state packing optimization. In 1 the direct hydrogen bonding fromthe secondary coordination sphere of octahedral [M(H2O)6]2þ to L-pyridyl helps in the formation of an octahedral cation-anion coordination in the NaCl-type structure. In 2 and 3, crystal water instead of the cations has to satisfy the hydrogen-accepting demands of L. Consequently, a non-spherical and only partly water-surrounded half-encapsulated [SO4⊂L]2- anion allows for a closer approach of the [Fe(DABP)3]2þ or [Fe(bipy)3]2þ cations than the [SO4⊂L2]2- anion. Then, the similar cation and anion size in 2 and 3 with the Coulomb attraction confined to a two-dimensional plane leads to the formation of a hexagonal BN (or graphite) lattice. Competition experiments with different anions for compound 2 reveal that SO42- can be selectively crystallized against NO3-, OAc-, or ClO4-.
学科主题	金属有机与超分子催化
收录类别	SCI
资助信息	the National Natural Science Foundation of China (Grant 20872149);the “Bairen Jihua” project of the Chinese Academy of Sciences
语种	英语
WOS记录号	WOS:000270987400041
公开日期	2012-09-21
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/534]
专题	兰州化学物理研究所_OSSO国家重点实验室兰州化学物理研究所_ERC国家工程研究中心
通讯作者	Yang XJ(杨晓娟); Yang XJ(杨晓娟)
推荐引用方式 GB/T 7714	Yang XJ,Yang XJ. Full- or Half-Encapsulation of Sulfate Anion by a Tris(3-pyridylurea) Receptor: Effect of the Secondary Coordination Sphere[J]. Inorganic Chemistry,2009,48(21):10249-10256.
APA	杨晓娟,&杨晓娟.(2009).Full- or Half-Encapsulation of Sulfate Anion by a Tris(3-pyridylurea) Receptor: Effect of the Secondary Coordination Sphere.Inorganic Chemistry,48(21),10249-10256.
MLA	杨晓娟,et al."Full- or Half-Encapsulation of Sulfate Anion by a Tris(3-pyridylurea) Receptor: Effect of the Secondary Coordination Sphere".Inorganic Chemistry 48.21(2009):10249-10256.