title: Two New Copper Borates with Mesoscale Cubic Supramolecular Cages Assembled from {Cu4@B20} Clusters.
abstract: Two new copper borates, namely H6[(μ4-O)Cu4@B20O32(OH)8]⋅25 H2O (1) and H6[(μ4-O)Cu4@B20O32(OH)8]⋅34 H2O⋅8 H3BO3(2), with 3D supramolecular framework have been made under solvothermal conditions, which built by novel cubic supramolecular cages with mesoscale cavities via the H-bondings. Interestingly, the cage is assembled by [(μ4-O)Cu4@B20O32(OH)8] ({Cu4@B20}) cluster units with different point-group symmetry. Owing to extra H3BO3molecules participated in building the supramolecular framework, 2 has a larger cubic cage size and higher non-framework volume, leading to the cage size extended to mesoporous size set as a version of ''1 plus".
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China.
authors.forename: Jia-Jia
authors.initials: JJ
authors.lastname: Wang
authors.affiliation: MOE Key Laboratory of Cluster Science, School of Chemistry, Beijing Institute of Technology, Beijing, 100081, P. R. China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wei
authors.affiliation: MOE Key Laboratory of Cluster Science, School of Chemistry, Beijing Institute of Technology, Beijing, 100081, P. R. China.
authors.forename: Bai-Feng
authors.initials: BF
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China.|Department of Chemistry, Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong, 515063, P. R. China.|MOE Key Laboratory of Cluster Science, School of Chemistry, Beijing Institute of Technology, Beijing, 100081, P. R. China.
authors.forename: Guo-Yu
authors.identifier: http://orcid.org/0000-0002-0911-2805
authors.initials: GY
authors.lastname: Yang
keywords: borates; cage compounds; hydrothermal synthesis; oxoboron clusters; supramolecular framework