Two novel hybrid compounds [Ni(2,2-bpy)₃]_2.5(PNiW₁₁O₄₀)]·3.1(H₂O) (1) and [Ni₄(pyz)₂][A-α-PW₉O₃₄]₂·(pyz)₅·7H₂O (2) (bpy = 2,2′-bpyridine, pyz = piperazine) have been synthesized under mild hydrothermal condition and structurally characterized by physico-chemical and series spectroscopic methods. Compound 1 contains nickel^(II) mono-substituted Keggin type polyoxotungstate {PNiW₁₁O₃₉} anion, two and a half discrete [Ni^II(2,2-bpy)₃]²⁺ complexes and 3.1 water molecules. Compound 2 is composed of a novel tetra-nickel-substituted sandwich-type {[Ni₄(pyz)₂][A-α-PW₉O₃₄]₂} polyanion, three free piperazine molecules and seven lattice water molecules. Extensive hydrogen-bonding interactions were observed in 1 and 2. Through multipoint hydrogen-bonding interactions, a novel 2D network with rectangular cavities for 1 and a 3D porous supermolecule structure for 2 generate, respectively. The investigation of both nickel-substituted hybrids as efficient and robust catalysts for H₂ production from water splitting and photo-degradation pharmaceutical wastewater upon visible-light irradiation was carried out.

两种新型杂化化合物 [Ni(2,2-bpy) ₃ ] _2.5 (PNiW ₁₁ O ₄₀ )]·3.1(H ₂ O) (1) 和 [Ni ₄ (pyz) ₂ ][A-α-PW ₉ O ₃₄ ] ₂ ·(pyz) ₅ ·7H ₂ O (2) (bpy = 2,2'-bpyridine, pyz = 哌嗪) 已在温和的水热条件下合成，并通过物理化学和系列光谱方法进行结构表征。化合物1含有镍^(II)单取代的Keggin型聚氧钨酸盐{PNiW ₁₁ O ₃₉ }阴离子，两个半离散的[Ni^II (2,2-bpy) ₃ ] ²⁺络合物和3.1个水分子。化合物2由新型四镍取代夹心型{[Ni ₄ (pyz) ₂ ][A-α-PW ₉ O ₃₄ ] ₂ }聚阴离子、三个游离哌嗪分子和七个晶格水分子组成。在1和2中观察到广泛的氢键相互作用。通过多点氢键相互作用，一种新型的2D网络与矩形腔为1和用于3D多孔超分子结构2分别生成。研究了两种镍取代杂化物作为有效且稳健的催化剂，用于在可见光照射下从水分解和光降解制药废水中生产H ₂。