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The first column of two-dimensional (2D)-layered metalcomplex-templated nickel borate was obtained by using a solvothermal synthesis method. The 2D nickel borate [Ni(en) 3 ]•[Ni 0.5 B 6 O 8 (OH) 4 ]•Cl (1; en = ethylenediamine) contains [Ni(en) 3 ] 2+ , Cl − , and the first reported inorganic nickel borate layer [Ni 0.5 B 6 O 8 (OH) 4 ] − , which is formed by the interconnection of Ni and O atoms in the B−O cluster. By increasing the reaction temperature during the synthesis process of compound 1, the onedimensional (1D) chain nickel borate [Ni(en) 3 ] 2 •[B 7 O 10 (OH) 3 ]•Cl 2 (2) was obtained, wherein the [B 7 O 10 (OH) 3 ] cluster was connected through an O atom to form a 1D chain structure. By adjusting the molar ratio of the raw materials, that is, adjusting the pH of the reaction, the other 1D chain nickel borate Ni(en) 3 •Hen•[B 9 O 13 (OH) 4 ]•H 2 O (3) was obtained, in which [B 5 O 8 (OH) 2 ] and [B 4 O 7 (OH) 2 ] clusters can be connected via a common O atom to form an infinite [B 9 O 13 (OH) 4 ] polyanionic chain. Meanwhile, we successfully synthesized the isoform of compound 3 with the metal cadmium.

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A zinc acetate borate, [ZnAc]·[ZnBO3] (1), was synthesized under mild conditions; the B@Zn2O3 layer of 1 contains a 6-membered ring embedded with a rare BO3 unit. The layers are pillared by acetate ions to form a 3D framework. The pillared structure of 1 supplies enough space as a nanoreactor, and the related application of CO2-to-CO reduction has been confirmed.