Ni(en)3·Hen·[B9O13(OH)4]·H2O was prepared under the cotemplating effect of [Ni(en)3](2+) and Hen(+). It was the first example of a cotemplated borate with an unusual chiral polyanionic chain, which was constructed from [B5O8(OH)2] and [B4O7(OH)2] clusters.

A 3D inorganic-organic hybridized skeleton cadmium borate [Cden][B5O8(OH)] (1) (en = ethylenediamine) has been solvothermally synthesized. By calcining it, specific shape carbon dots (C-dots) with abundant free radicals were observed. In addition, C-dots in the ethanol phase exhibited variable photoluminescence and showed rare turn on or off effects to Cr3+ ions and CdSe/ZnS quantum dots, but only a turn on effect to Cs+ ions and a turn off effect to CsPbBr3 quantum dots.

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A templated borate [Hdmpip][B 5 O 6 (OH) 4 ] (dmpip = 1,4-dimethylpiperazine) has been synthesized and characterized by single crystal X-ray analysis, element analysis, IR spectroscopy, PXRD, TG-DSC, EPR, luminescence spectroscopy, and quantum chemistry analysis. The title compound contains the [B 5 O 6 (OH) 4 ] -anions that are connected together by O-HÁÁÁH H-bonds to form a 3-D network with 1-D tunnels, in which [Hdmpip] ? cations were located in. The luminescence spectra of [C 9 H 14 N]Á[B 5 O 6 (OH) 4 ] showed tunable luminescence emission by means of annealing treatment from 150 to 360°C.

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