Two alkali-metal sulfamates nonlinear optical (NLO) crystals, Li(NH₂SO₃) and Na(NH₂SO₃), have been obtained through the facile evaporation method. Li(NH₂SO₃) crystallizes in the polar space group Pca2₁ (No.29). The structure of Li(NH₂SO₃) can be described as a 3D network formed by [LiO₄]^7- polyhedral connecting with NH₂SO₃^- tetrahedra through corner-sharing. Na(NH₂SO₃) crystallizes in the polar space group P2₁2₁2₁ (No.19). The structure of Na(NH₂SO₃) can be described as a 3D network formed by distorted [NaO₆]^11- octahedral connecting with NH₂SO₃^- tetrahedra through corner-sharing. The UV-Vis-near-infrared spectra demonstrate that Li(NH₂SO₃) and Na(NH₂SO₃) possessed large optical band gaps of 5.25 and 4.81 eV, respectively. Powder second-harmonic generation (SHG) measurements demonstrate that the SHG intensity of Li(NH₂SO₃) and Na(NH₂SO₃) were 0.32 times and 0.31 times that of KH₂PO₄, respectively. First-principles calculations confirm the nonlinear optical performance mainly derived from the synergistic effect of amino sulfonate anions and alkali metal oxide anionic polyhedra.

用2，5-二(2-甲氧基-乙氧基)对苯二甲酰肼(BMTH)和1，3，5-三甲氧基-2，4，6-三甲酰基苯(TpOMe)缩聚，基于界面聚合法，在多孔三氧化二铝(AAO)基底上制备出一种二维共价有机骨架(COF)膜TpOMe-BMTH，并研究了所得膜材料对锂、镁离子的分离性能。结果显示，TpOMe-BMTH/AAO膜具有高的结晶性和良好的稳定性，并表现出优异的金属离子选择性，在LiCl(0.1 mol·L^-1)和MgCl₂(0.1 mol·L^-1)组成的二元混合离子体系中，对Li⁺/Mg²⁺的分离因子高达258。基于密度泛函理论的平面波赝势方法计算表明，材料孔道中的富氧低聚醚链对Li⁺和Mg²⁺的结合能分别为-282.69和-13.46 kJ·mol^-1，使材料表现出强的亲锂特性，促进了Li⁺沿着COF膜的一维孔道进行吸附扩散，最终实现锂、镁离子的高效分离。