Three neodymium-based cationic layered inorganic materials capable of anion exchange.

• A series of three cationic, neodymium-based inorganic-organic hybrids are reported. • The three cationic materials are all capable of anion exchange. • These structures further the chemistry of extended cationic inorganic materials using f-block metals. We report the synthesis and characterization of three cationic two-dimensional Nd(III)-based inorganic materials. The materials consist of [Nd 2 (OH) 4 (OH 2) 2 2+ layers with interlamellar α,ω-−O 3 S(CH 2) n SO 3 − anions (n = 2–4). The materials were characterized by single crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analysis and infrared spectroscopy. As an initial example of anion exchange, all three materials show uptake of adipate, −O 2 C(CH 2) 4 CO 2 −. These layered rare earth hydroxides show an increase in thermal stability with alkanedisulfonate chain length. The three polytypes expand the known chemistry for extended cationic inorganic materials using f-block metals. [ABSTRACT FROM AUTHOR]