Syntheses and Structures of Two New Borates: [NH₃(CH₂)₃N(CH₂)₄N(CH₂)₃NH₃][B₅O₆(OH)₄]₂ and [NH₂(CH₂)₄N(CH₂)₂NH₃][B₇O₁₀(OH)₃]

Two new borates, [NH₃(CH₂)₃N(CH₂)₄N(CH₂)₃NH₃][B₅O₆(OH)₄]₂ (1) and [NH₂(CH₂)₄N(CH₂)₂NH₃][B₇O₁₀(OH)₃] (2), have been made under hydrothermal conditions and characterized by infrared spectroscopy, thermogravimetric analysis, powder X-ray diffraction, and single-crystal X-ray structural analysis, respectively. Crystal data for 1: monoclinic, P2₁/c, a = 9.504(3) Å, b = 14.305(4) Å, c = 10.513(3) Å, β = 90.313(5)°, Z = 2. Crystal data for 2: triclinic, P 1, a = 9.196(3) Å, b = 9.722(3) Å, c = 11.361(3) Å, α = 71.232(11)°, β = 71.603(10)°, γ = 72.354(12)°, Z = 2. The protonated organic amines are filled in the free space of the hydrogen- bonded network and interact with the inorganic framework by extensive hydrogen bonds. Graphical Abstract: Two new borates, [NH₃(CH₂)₃N(CH₂)₄N(CH₂)₃NH₃][B₅O₆(OH)₄]₂ (1) and [NH₂(CH₂)₄N(CH₂)₂NH₃][B₇O₁₀(OH)₃] (2), have been made under hydrothermal conditions. In the structures, the borate anions linked each other via the H-bonding interactions to form the supramolecular inorganic network/frameworks, which further interact with the guest cations through H-bonding and electrostatic interactions, resulting in inorganic-organic hybrid supramolecular frameworks.