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Unexpected structural complexity of thorium coordination polymers and polyoxo cluster built from simple formate ligands
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2019-10-30 , DOI: 10.1039/c9qi01263j
Zi-Jian Li 1, 2, 3, 4, 5 , Shangyao Guo 1, 2, 3, 4, 5 , Huangjie Lu 1, 2, 3, 4, 5 , Yongjia Xu 1, 2, 3, 4, 5 , Zenghui Yue 1, 2, 3, 4, 5 , Linhong Weng 5, 6, 7, 8, 9 , Xiaofeng Guo 6, 10, 11, 12 , Jian Lin 1, 2, 3, 4, 5 , Jian-Qiang Wang 1, 2, 3, 4, 5
Affiliation  

A simple binary synthetic approach with variable [HCOOH]/[Th(IV)] ratios and the addition of water resulted in the self-assembly of six novel thorium formate complexes with well-controlled structures ranging from 0D clusters and 2D layered networks to 3D frameworks. Specifically, small [HCOOH]/[Th(IV)] promoted the formation of the hexanuclear Th6O4(OH)4(HCOO)12 core, a secondary building unit for the construction of 3D [Th6Na(μ3-O)43-OH)4(HCOO)14]·[NH2(CH3)2]·(DMF)3(H2O)5 (Th-SINAP-1), 2D [Th63-O)43-OH)4(HCOO)12(DMF)2]·(H2O)10 (Th-SINAP-2), and 0D [Th63-O)43-OH)4(HCOO)12(H2O)6]·G (Th-SINAP-3). The large [HCOOH]/[Th(IV)] inhibited the olation/oxolation reaction, affording 3D frameworks of [Th2(HCOO)9]·[NH2(CH3)2]·(DMF)(H2O)2 (Th-SINAP-4), [Th2(HCOO)9]·[NH2(CH3)2]·(DMF)(H2O)4 (Th-SINAP-5), and [Th2(HCOO)8(H2O)(DMF)]·(H2O)3 (Th-SINAP-6) with monomeric Th(IV) cations as the metal nodes. The addition of water not only affected the hydrolysis of Th(IV) to form nucleophilic hydroxo/oxo-aquo Th species, but also influenced the overall solid-state packing via the competition between H2O, HCOO, OH/O2−, and DMF for coordination with Th4+ cations. This unexpected structural complexity of thorium formates opens a new avenue for the targeted design and synthesis of atypical coordination polymers, e.g. open-framework materials of actinides, for applications in diverse fields such as radionuclide adsorption.

中文翻译:

由简单的甲酸酯配体构建的coordination配位聚合物和多氧簇的意外结构复杂性

一种简单的具有可变[HCOOH] / [Th(IV)]比率的二元合成方法,并添加水导致六种新颖的甲酸complex配合物自组装,其结构受控范围从0D簇和2D分层网络到3D构架。具体而言,小[HCOOH] / [钍(IV)]促进了六核的形成的Th 6 ø 4(OH)4(HCOO)12芯,次级建筑物单元用于3D [钍的结构6的Na(μ 3 - O)4(μ 3 -OH)4(HCOO)14 ]·[NH 2(CH 32]·(DMF)3(H 2 O)5钍SINAP-1 ),2D [钍6(μ 3 -O)4(μ 3 -OH)4(HCOO)12(DMF)2 ]·(H 2 O)10钍SINAP-2 ),和0D [钍6(μ 3 -O)4(μ 3 -OH)4(HCOO)12(H 2 O)6 ]·G(钍SINAP -3-)。大[HCOOH] / [Th(IV)]抑制olation / oxolation反应,提供[Th 2(HCOO)9 ]·[NH 2(CH 32 ]·(DMF)(H 2 O)2Th-SINAP-4的3D骨架,[ Th 2(HCOO)9 ]·[NH 2(CH 32 ]·(DMF)(H 2 O)4Th-SINAP-5)和[Th 2(HCOO)8(H 2 O)(DMF) )]·(H 2 O)3Th-SINAP-6)与单体Th(IV)阳离子作为金属节点。加入水不仅影响钍(水解IV),以形成亲核羟/氧代水合钍物种,但也影响了整体固态填料通过h的竞争2 O,HCOO -,OH - / O 2 -和DMF与Th 4+阳离子配位。unexpected形式的这种意想不到的结构复杂性为非典型配位聚合物(例如act系元素的开放骨架材料)的目标设计和合成开辟了新的途径,可用于各种领域,例如放射性核素吸附。
更新日期:2019-10-30
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