A New 3-D Open-Framework Zinc Phosphate [C_6H_(16)N_2]centre not[Zn_2(HPO_4)_3] Synthesized by a Solvothermal Combinatorial Approach

摘要

By application of a combinatorial approach,a new open-framework zinc phosphate [C_6H_(16)N_2]centre not[Zn_2(HPO_4)_3] (denoted as phase D) has been obtained in the Zn(OAc)_2centre not2H_2O/ H_3PO_4/N,N'-dimethylpiperazine/ethylene glycol solvother-mal reaction system at 180degC.The factors influencing formation of the reaction products,such as crystallization temperature,solvent,as well as gel compositions,have been systematically studied.Phase D was characterized by X-ray powder diffraction,ICP,and TG analyses,and its structure was determined by single-crystal X-ray diffraction analysis.It crystallizes in the monoclinic space group P2_1 (no.14),with a=8.6931(3) A,b=14.4394(5) A,c=12.6492(3) A,beta=96.418(2)deg,and Z=4.It is composed of ZnO_4,PO_3(OH) and PO_2(OH)(=O) tetrahedral units linked by Zn-O-P bonds,forming an open-framework with intersecting eight-membered ring channels along the [100],[010],and [101] directions.