[Fe(H₂O)₆]·2HSO₄·2H₂O (1), (NH₄)₂[Fe(SO₃)₂] (2) and (NH₄)₄[Fe₂(SO₄)₄(OH)₂]·NaCl (3) have been synthesized and well characterized by elemental, IR spectra, thermal and X-ray structural analyses, and theoretical bond valence calculations. Octahedral Fe(H₂O)₆²⁺ and tetrahedral SO₄²⁻ ions are connected by hydrogen bonds to form three-dimensional network in 1. Coordination of iron with sulfite forms a 2D snowflake structure in 2. The iron(III) atoms in 3 are connected to each other to form a helical chain by two sulfates and one hydroxide. The iron chains are further connected into a 3D network by sodium atoms. Moreover, the catalytic performances of 1 and 3 were tested by the degradations of methyl orange respectively. 1 possesses small channels with dimensions of 3.5 ​× ​1.8 ​Å. It can selectively adsorb a small amount of O₂ for 23.83 ​mg/g at 29.9 ​bar, comparing with a few or no adsorptions of N₂, H₂, CO₂ and CH₄ respectively.

[Fe(H ₂ O) ₆ ]·2HSO ₄ ·2H ₂ O ( 1 ), (NH ₄ ) ₂ [Fe(SO ₃ ) ₂ ] ( 2 ) 和 (NH ₄ ) ₄ [Fe ₂ (SO ₄ ) ₄ (OH) ₂ ]·NaCl ( 3 ) 已被合成并通过元素、红外光谱、热和 X 射线结构分析以及理论键价计算得到了很好的表征。八面体 Fe(H ₂ O) ₆ ²⁺和四面体 SO ₄ ²⁻离子通过氢键连接形成三维网络1。铁与亚硫酸盐的配位在2 中形成二维雪花结构。在铁（III）原子3被连接到彼此的两个硫酸盐和一种氢氧化物，以形成螺旋形链。铁链通过钠原子进一步连接成 3D 网络。此外，分别通过降解甲基橙来测试1和3的催化性能。1拥有尺寸为 3.5 × 1.8 Å 的小通道。它可以在 29.9 bar 下选择性吸附少量 O ₂为 23.83 mg/g，与少量或不吸附 N ₂、H 相比₂、CO ₂和CH ₄分别。