Hydroxyl- and chloro-bridges as "structural assistants" in the construction of two new Keggin-based 3D frameworks

作者：Tian AiXiang; Lin XiaoLing; Liu XiaoJing; Ying Jun; Wang Xiuli^*

来源：RSC Advances, 2013, 3(38): 17188-17194.

DOI：10.1039/c3ra41567h

Two new Keggin-based three dimensional (3D) frameworks, [Cu-4(I)(btb)(2)(m-OH)(PW12O40)] (1) and [Cu-2(II)(btb)(4)(m-Cl)(PW12O40)]center dot 3H(2)O (2) (btb = 1,4-bis(1,2,4-triazol-1-y1)butane), were synthesized and structurally characterized. In compound 1, the metal-organic subunit is a wave-like 2D layer consisting of ellipse-shaped tetra-nuclear Cu-I cycles. Furthermore, these layers are bridged by hydroxyl groups through Cu-(OH)-Cu bonds, resulting in the construction of a 3D porous metal-organic framework (MOF). The Keggin anions, acting as inorganic templates, are embedded in the channels of the structure. In compound 2, a 2D Cu-II-btb layer exists that incorporates quadrangular tetra-nuclear Cu-II cycles. The two adjacent layers covalently capture the Keggin anions between them to construct a hamburger-like subunit. Furthermore, these subunits are linked by chloro-bridges (Cu-Cl-Cu), which build a 3D framework with channels. The big voids in the channels led to a two-fold interpenetrating structure for compound 2. Additionally, the photocatalytic properties and electrochemical behavior of compounds 1 and 2 have been investigated.

• 出版日期2013
• 单位渤海大学