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Co‐templating Ionothermal Synthesis and Crystal Structure of a New Layered Aluminophosphate from a Protic Deep Eutectic Solvent
Author(s) -
Li Yuan,
Gong Xiangdong,
Liu Lei,
Dong Jinxiang
Publication year - 2016
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201600023
Subject(s) - chemistry , deep eutectic solvent , methylamine , eutectic system , alkyl , urea , amine gas treating , selectivity , hydrogen bond , solvent , salt (chemistry) , ammonium , inorganic chemistry , organic chemistry , molecule , catalysis , alloy
Protic deep eutectic mixtures are usually composed of organic amine hydrochloride salts and hydrogen bond donors in a specific molar ratio. Ionothermal synthesis of aluminophosphate as an example, herein, was reported for the first time from an urea‐based protic eutectic mixture, consisting of diethylammonium chloride (DEACl) and 1,3‐dimethyl urea (DMU). As a result, a new two dimensional aluminophosphate with 4.8‐network, [CH 3 NH 3 ] 2 [(C 2 H 5 ) 2 NH 2 ]Al 3 (PO 4 ) 4 , has been successfully synthesized by co‐templating the DEA and methylamine in situ generated from the decomposition of DMU in the absence of HF. Compared to alkyl quaternary ammonium salts with more alkyl‐group connected with N atom, this kind of organic amine salts are more likely as the structure‐directing agents to synthesize aluminophosphates in urea‐based deep eutectic mixtures. It was also found that HF is crucial to the phase selectivity, a known compound with chain‐like structure was obtained with the single methylamine as a structure‐directing agent in the presence of HF. These materials were characterized by powder XRD, SEM, TG‐DSC, 13 C CP‐MAS NMR and CHN analyses.