Issue 40, 2021

Five new rubidium borates with 0D clusters, 1D chains, 2D layers and 3D frameworks

Abstract

Five new rubidium borates, namely Na1/3Rb5/3[B4O5(OH)4] (1), Rb4[B12O18(OH)4] (2), Rb2Ba[B12O18(OH)4] (3), Rb2[B5O8(OH)] (4) and NaRb0.5[B6O10]·0.5H3O (5) have been synthesized under solvothermal conditions. Compound 1 features a 0D structure composed of [B4O5(OH)4]2− clusters. After changing the metal salt, new cyclic [B12O20(OH)4]8− clusters in 2 and 3 are formed, resulting in 1D chains. Such a chain structure is first discovered in dodecaborates. By tuning the reaction temperature and pH of the reaction media, compound 4 with a 4-connected 2D oxoboron layer constructed from partially protonated [B5O10(OH)]6− and compound 5 with a 6-connected 3D framework constructed from [B6O13]8− clusters are successfully isolated. Since compounds 1 and 4 crystallize in the non-centrosymmetric (NCS) space group, second harmonic generation (SHG) measurements and dipole moment calculations have been carried out. The SHG response of 4 is 2.0 times that of KH2PO4 (KDP), which is higher than those of related analogues.

Graphical abstract: Five new rubidium borates with 0D clusters, 1D chains, 2D layers and 3D frameworks

Supplementary files

Article information

Article type
Paper
Submitted
19 Jūl. 2021
Accepted
01 Sept. 2021
First published
01 Sept. 2021

CrystEngComm, 2021,23, 7081-7089

Five new rubidium borates with 0D clusters, 1D chains, 2D layers and 3D frameworks

Q. Qiu, K. Sun and G. Yang, CrystEngComm, 2021, 23, 7081 DOI: 10.1039/D1CE00944C

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