An Open-Framework Aluminophosphite with Face-Sharing AlO6 Octahedra Dimers and Extra-Large 14-Ring Channels

作者：Lin, Cong; Pan, Fengjuan; Li, Jian; Chen, Yanping; Shi, Dier; Ma, Tianqiong; Yang, Yanquan; Du, Xin; Wang, Wei; Liao, Fuhui; Lin, Jianhua; Yang, Tao^*; Sun, Junliang^*

来源：Crystal Growth & Design, 2018, 18(3): 1267-1271.

DOI：10.1021/acs.cgd.7b01636

• STRUCTURE-DIRECTING AGENTS
• MOLECULAR-SIEVE
• LAYERED ALUMINOPHOSPHATE
• IONOTHERMAL SYNTHESIS
• BERYLLIUM PHOSPHITE
• 24-RING CHANNELS
• INDIUM PHOSPHATE
• NMR
• INTERMEDIATE
• RESOLUTION

PKU-25A1, an open-framework aluminophosphite possessing extra-large intersecting 14-ring (14R) channels and a novel Al/P ratio of 9/14, was hydrothermally synthesized using commercially available 4-dimethylaminopyridine (DMAP) as organic structure-directing agents (OSDA). Two types of secondary building units (SBUs), SBU-1 with 6*1 units and racemic SBU-2 composed of two chiral 4=1 units, are utilized to construct the porous layers with a 4.6.12 net topology and the chains with unprecedented face-sharing AlO6 octahedra dimers, respectively. Stringing the ABAB stacked layers via the chains would achieve the PKU-25A1 framework with a unique topology as well as numerous chiral channel motifs. Meanwhile, the protonated DMAP molecules interact with the inorganic framework through hydrogen bonding and reside in the voids with an exceptional triangular pattern. PKU-25A1 is the first aluminophosphite with extra-large channels and enriches the materials chemistry of the open-framework families with exceptive structures.

• 出版日期2018-3
• 单位重庆大学; 兰州大学; 北京大学