A crystalline AlPO4-5 intermediate: designed synthesis, structure, and   phase transformation

doi:10.1039/c7dt02772a

CORC > 北京大学 > 化学与分子工程学院

	A crystalline AlPO4-5 intermediate: designed synthesis, structure, and phase transformation
	Lin, Cong ; Li, Jian ; Pan, Fengjuan ; Zhao, Yifang ; Xu, Le ; Yang, Yanquan ; Du, Xin ; Lin, Xiaohuan ; Liao, Fuhui ; Lin, Jianhua ; Yang, Tao ; Sun, Junliang
刊名	DALTON TRANSACTIONS
	2017
关键词	LAYERED ALUMINOPHOSPHATE MOLECULAR-SIEVE ANIONIC ALUMINOPHOSPHATES HYDROTHERMAL SYNTHESIS MECHANISM STOICHIOMETRY TEMPERATURE CONVERSION FRAMEWORK ZEOLITES
DOI	10.1039/c7dt02772a
英文摘要	AlPO4-5 is the most extensively studied material in exploring the crystallization mechanism of alumino-phosphate molecular sieves, and it can be synthesized using 4-dimethylaminopyridine (DMAP) as an organic structure-directing agent (OSDA). Achieving the AlPO4-5 intermediate in the crystalline form would be of great importance and significance for this purpose. In this study, we proposed a concept that by carefully regulating the synthesis conditions, crystalline alumimophosphate intermediates could be rationally prepared. A crystalline AlPO4-5 intermediate, (C7H11N2)(2)(H3O)(Al3P4O16)center dot(H2O)(2.5) (1), was, therefore, synthesized by significantly increasing the amounts of orthophosphoric acid and DMAP. The intermediate 1 consists of alternating organic DMAP and inorganic [Al3P4O16](3-) layers with abundant hydrogen bonds and can transform to the AlPO4-5 framework upon heating in air or through a steam-assisted conversion (SAC) method. To unravel the role of DMAP in the transformation, pure AlPO4-5 (2) was also synthesized by altering the synthesis conditions. The supramolecular assembly templating (SAT) effects of DMAP in 1 and 2 were verified via fluorescence spectra. Thus, the pi-pi stacking interactions between the DMAP molecules and the abundant hydrogen bonds between the adjacent layers are considered to be important for the phase transformation of 1. This crystalline intermediate would promote the understanding of the crystallization mechanism in the system of alumino-phosphate molecular sieves.; National Basic Research Program [2013CB933402, 2016YFA0301004]; Nature Science Foundation of China [21527803, 21471009, 21321001]; SCI(E); ARTICLE; 36; 12209-12216; 46
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/470749]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Lin, Cong,Li, Jian,Pan, Fengjuan,et al. A crystalline AlPO4-5 intermediate: designed synthesis, structure, and phase transformation[J]. DALTON TRANSACTIONS,2017.
APA	Lin, Cong.,Li, Jian.,Pan, Fengjuan.,Zhao, Yifang.,Xu, Le.,...&Sun, Junliang.(2017).A crystalline AlPO4-5 intermediate: designed synthesis, structure, and phase transformation.DALTON TRANSACTIONS.
MLA	Lin, Cong,et al."A crystalline AlPO4-5 intermediate: designed synthesis, structure, and phase transformation".DALTON TRANSACTIONS (2017).