Synthesis and characterization of the first hydrothermally synthesized tin borate Sn2B3O6(OH)

Sn3B8O15: A Ternary Tin(II) Borate with Flexible [B8O18]12– Fundamental Building Block Formed by [B7O16]11– and [BO3]3– Groups

“…These bond lengths and O–B–O angles matched well with the previously reported borates . What’s more, the bond valence sum (BVS) calculations of Sn 2+ , B 3+ , and O 2– bring about the rational values of 1.536–1.749, 3.001–3.097, and 1.775–2.119, respectively, indicating that the structure is valid and feasible − (Table S1).…”

“…Notably, Sn 3 B 8 O 15 phase is stable before 500 °C, and it is decomposed to SnO 2 at 600 °C, which confirms that the phase is stable in the air (<500 °C) similar to the reported Sn compounds. [16][17][18][19][20][21][22][23]55 The same result is found in the closed system. Hence, the endothermic peak is the decomposition peak and Sn 3 B 8 O 15 melts incongruently.…”

“…Therein, β-SnB 4 O 7 , the first single crystal tin borate, was synthesized under high pressure (7.5 GPa, 1100 °C) by Huppertz et al in 2007, and before that, only the glass compositions were obtained without any exceptions. Recently, the very first normal-pressure tin borate, Sn 3 B 4 O 9 , has been synthesized under ambient pressure by decomposition (520 °C) of Sn 3 B 3 O 7 F by Höppe et al Moreover, tin borate iodide Sn 3 B 3 O 7 I and two hydroxyl tin borates, Sn 2 B 3 O 6 (OH) and SnB 8 O 11 (OH) 4 , were obtained via hydrothermal conditions and feature multiple structures, which enriched the structural chemistry of the tin borate system. The good optical properties and diverse structural chemistry of the tin borate system motivate us to keep exploring in the ternary tin borate system.…”

Synthesis and Characterization of the First Tin Fluoride Borate Sn3[B3O7]F with Second Harmonic Generation Response

“…Figure b shows the connectivity of the three tin atoms with the corresponding oxygen atoms and the unique fluoride atom in enlarged form with the relevant interatomic distances. Sn1 and Sn3 are interconnected via the two oxygen atoms O2 and O4, like in the compound Sn 2 B 3 O 6 (OH) . The Sn−O distances are in the range of 209.2(3) to 244.8(3) pm.…”

“…Our group has already succeeded in synthesizing new tin borates in the Sn‐B‐O‐H system like Sn 2 B 3 O 6 (OH) and SnB 8 O 11 (OH) 4 . Guided by the idea to synthesize the first tin fluoride borate under hydrothermal conditions in the system Sn‐B‐O‐F, we successfully obtained the novel compound Sn 3 [B 3 O 7 ]F.…”