Pb₂Al₂B₃O₈F₃: structure and properties of a new fluoroaluminoborate with non-traditional chain-like B₃O₈ groups

Abstract

A new fluoroaluminoborate, Pb2Al2B3O8F3, with a non-traditional chain [B3O8]7- was synthesized by high temperature reactions in closed systems for the first time. Different from the traditional [B3O8]7- ring [(3:Δ +...

Structural Motif Cosubstitution Strategy for Designing Fluoroaluminoborate with the Sr2Be2B2O7-Type Double-Layered Structure

“…Therein, the Al–O bonds (1.876(5) and 1.889(5) Å) associated with the edge-sharing of Al–O–Al-O are longer than those of other normal Al–O bonds (1.854 (5) and 1.870 (5) Å), which is beneficial to decrease the repulsion of neighboring Al cations and enhance the stability of edge-sharing [AlO 4 F 2 ] octahedra. It can be named a trans -[AlO 4 F 2 ] unit, since the F atoms are located at the two opposite positions of the [AlO 4 F 2 ] octahedron in Sr 2 Al 2.18 B 5.82 O 13 F 2 , which differs from cis -[AlO 4 F 2 ] unit in Pb 2 Al 2 B 3 O 8 F 3 . In the previous research, few fluoroaluminoborates with excellent optical properties have been reported, and they have been listed in Table S4 in the Supporting Information.…”

“…44 Enlightened by these efficient strategies, we attempted to explore the structural regulations via rational structural motif cosubstitution and anticipate achieving novel structures in fluoroaluminoborates. 45 In the previous research, few fluoroaluminoborates with excellent optical properties have been reported, and they have been listed in Table S4 in the Supporting Information. As shown in Figure S1 in the Supporting Information, the similar edge-sharing octahedra can be found in other fluoroaluminoborates 60,61 In addition, there are also some successful cases of various structural motif linkers filled in the single-layer structures.…”