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Modification and Restacking of Layered Terbium Hydroxide 2D Crystals
Author(s) -
Feng Pingping,
Shao Baiyi,
Wang Xinying,
Yang Xiaojing
Publication year - 2017
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201700825
Subject(s) - terbium , chemistry , formamide , hydroxide , alkyl , crystallography , aqueous solution , ion , inorganic chemistry , organic chemistry
We report that 2D crystals, prepared by delamination of layered terbium hydroxide (LTbH) intercalated with dodecyl sulfate ions (DS – ) in formamide, can be modified by DS – ions and further restacked to a new layer‐structured compound. The modification proceeds in situ in formamide through the substitution of DS – for the hydroxyl groups, which coordinate to Tb 3+ upon the delamination of the LTbH layer. With the supplementary addition of DS – , the substitution reaction progresses to a large degree of substitution, m > 2 in the chemical formula Tb 2 (OH) 6– m DS m · n H 2 O. Since the negatively charged SO 4 2– heads of DS – anchor to Tb 3+ , the alkyl chains protruding outwards convert the 2D crystal from hydrophilic to hydrophobic. The modified 2D crystals aggregate in aqueous media, restacking to the layered rare‐earth compound characteristic of m greater than 2. The restacked crystals are ready to delaminate in some organic solvents owning to their structural and hydrophobic features.