[C(NH₂)₃]BiCl₂SO₄: an excellent birefringent material obtained by multifunctional group synergy

Abstract

Herein, multifunctional group synergistic strategy was proposed to develop an excellent organic-inorganic hybrid guanidine sulfate material [C(NH2)3]BiCl2SO4 (GuBiCl2SO4), which was constructed by three types of functional groups including planar triangle...

SbHPO3F: 2D van der Waals Layered Phosphite Exhibiting Large Birefringence

“…In addition, tetrahedral groups have a wide UV transmission window, which is beneficial to obtain UV and deep-UV optical compounds . However, compared with π-conjugated genes, the non-π-conjugated tetrahedral genes, like (BO 4 ) 5– , (PO 4 ) 3– , , and (SO 4 ) 2– − have T d symmetry, which is not beneficial to generating large optical anisotropy. Therefore, it is urgent to develop suitable methods to improve the optical anisotropy of tetrahedral groups.…”

Large optical anisotropy differentiation induced by the anion-directed regulation of structures

“…S4a and S4b†). According to the literature research, 29,42–45 the peaks at 609/561 cm −1 in (Gu) 2 Sb 3 F 3 (HPO 3 ) 4 and 656/548 cm −1 in (Gu)SbFPO 4 ·H 2 O can be considered to relate to the Sb–O/F asymmetric stretching and bending of Sb–O/F bonds, respectively. The peaks observed at around 3422/3239 cm −1 in (Gu) 2 Sb 3 F 3 (HPO 3 ) 4 and 3429/3198 cm −1 in (Gu)SbFPO 4 ·H 2 O can be attributed to the presence of C(NH 2 ) 3 and H 2 O molecules, respectively.…”

“…Pb 2+ , Bi 3+ , Sb 3+ , etc . 27–30 It also has been proved that a metal cation polyhedron in a highly distorted environment is beneficial to the generation of high polarizability anisotropy. For instance, Sn 2 B 5 O 9 Br 31 exhibits an extremely large birefringence of 0.439@546 nm due to the SnO 7 Br 2 polyhedra.…”

KSb(BeF3)F3: a totally fluorine strategy for achieving wide bandgap and large birefringence

“…The attributions of these peaks are consistent with those of the previously reported compounds. 13,16,21,23,40,41…”

“…13–16 Researchers have successfully designed and synthesized a variety of excellent Sn 2+ /Bi 3+ -containing birefringent optical materials. 17–21 In particular, Sn 2 PO 4 I synthesized by Pan's group exhibits a large birefringence (0.664@546 nm). 22 Notably, Sb 3+ cations with SCALPs possess an electronic configuration similar to that of Sn 2+ /Bi 3+ cations, implying that it would be beneficial for enhancing the birefringence.…”