resumo
A three-dimensional zinc phosphate compound with DFT topology, designated as ZnPO4-EU1, has been synthesized by an ionothermal approach from the system HF-ZnO-P2O5-choline chloride-imiclazoliclone. Ethylenediamine, derived from decomposition of the imidazolidone component of the deep-eutectic solvent (DES) itself, is delivered to the synthesis and serves as an appropriate template for ZnPO4-EU1. Experiments in which the synthesis conditions were varied showed that ZnPO4-EU1 may be prepared over a wide molar ratio of P/Zn = 0.55-13.0. Powder X-ray diffraction patterns have been obtained at intervals to track the crystallization process of this material. The experimental data show that Zn-3(PO4)(2). 4H(2)O (a dense phase) was first isolated from the DES after reaction for 1 h. Subsequently, the pure phase of ZnPO4-EU1 was obtained with increasing crystallization time from 12 h to 72 h. The experimental results show that the nucleation and crystallization take place with relatively low levels of solvent degradation, demonstrating that zinc phosphate with a three-dimensional framework can be synthesized by in situ generation of an appropriate template using an unstable DES at high temperatures (150-200 degrees C). (c) 2008 Elsevier Inc. All rights reserved.
palavras-chave
ALUMINOPHOSPHATE MOLECULAR-SIEVES; METAL-ORGANIC FRAMEWORKS; IONIC-LIQUID; COBALT PHOSPHATE; CHOLINE CHLORIDE/UREA; COORDINATION POLYMER; MIXTURES
categoria
Chemistry; Science & Technology - Other Topics; Materials Science
autores
Liu, L; Kong, Y; Xu, H; Li, JP; Dong, JX; Lin, Z
nossos autores
Zhi Lin
Investigador Principalagradecimentos
Authors thank the National Natural Science Funds of China (20573077, 50672063) and the Special Funds for Major State Technological Research 863 Project (No. 2007AA05Z153) for financial support.