RbSbSO₄Cl₂: an excellent sulfate nonlinear optical material generated due to the synergistic effect of three asymmetric chromophores

Abstract

RbSbSO4Cl2 exhibits a strong SHG response originating from the synergistic effect of three coexisting constituting asymmetric chromophores.

Sb6O7(SO4)2: A Promising Ultraviolet Nonlinear Optical Material with an Enhanced Second‐Harmonic‐Generation Response Activated by SbIII Lone‐Pair Stereoactivity

“…Absorption data were calculated by using the Kubelka–Munk function: [50] F ( R )= α / S =(1− R ) 2 /2 R ( α is the absorption, R is the reflectance, and S is the scattering). The band gap obtained by extrapolating the linear part of the rising curve to zero for 1 is 4.34 eV, which is comparable to that of other NLO sulfates, such as CsSbF 2 SO 4 (4.33 eV), [38] RbSbSO 4 Cl 2 (3.48 eV), [41] and Nb 2 O 3 (IO 3 ) 2 (SO 4 ) (3.25 eV) [49] …”

“…Typical examples include Bi 3 TeO 6 OH(NO 3 ) 2 , [33] Bi(IO 3 )F 2 , [34] Bi 3 (TeO 6 )(BO 3 ), [35] Pb 2 BO 3 I, [36] Pb 2 (NO 3 ) 2 (H 2 O)F 2 , [19] and Pb 2 B 5 O 9 I [37] . In comparison, it is noteworthy that antimony(III)‐based UV NLO materials are very limited [38–43] . The electron lone pair of Sb 3+ , with a 5 s 2 electron configuration, exhibits flexible, irregular coordination geometries, namely, trigonal‐pyramidal SbO 3 , sphenoid SbO 4 , and square‐pyramidal SbO 5 , which are conducive to the formation of acentric materials and can greatly enhance the birefringence and/or the SHG response.…”

Deep-ultraviolet transparent alkali metal–rare earth metal sulfate NaY(SO4)2·H2O as a nonlinear optical crystal: synthesis and characterization

“…These assignments show good agreement with those reported previously. 41,43,44 The UV-vis-NIR diffuse reflectance spectrum of NaY(SO 4 ) 2 •H 2 -O is shown in Fig. 5.…”

“…To further enhance the NLO properties of sulfates, cations with a stereochemically active lone-pair (SALP, e.g., Sb 2+ , Bi 3+ , etc.) [43][44][45][46][47][48][49] can be introduced into the sulfate structures and the resultant compounds include RbSbSO 4 Cl 2 (2.7 × KDP), 43 CsSbF 2 SO 4 (3.0 × KDP), 44 A 2 Bi 2 (SO 4 ) 2 Cl 4 (A = NH 4 , K, Rb; 4.8, 5.5, and 5.3 × KDP), 45 etc. However, these materials may exhibit unwanted red-shifting of the UV cutoff edges.…”

Synthesis, Crystal Structures, and Thermal Analyses of Two New Antimony Tellurite Sulfates: [Sb2(TeO4)](SO4) and [Sb2(TeO3)2](SO4)

“…As trivalent antimony is susceptible to oxidation, a considerably smaller number of Sb(III)-oxy compounds were found as compared to Sb(V)-oxy compounds. For compounds containing Sb(III), the most frequently observed coordination polyhedra are the [ [14] Sb 2 (S 2 O 7 ) 3 , [15] Sb 2 (OH) 2 (SO 4 ) 2 • 2H 2 O, [16] one dimensional chains in Sb 4 O 2 (OH)(SO 4 ) 4 (H 5 O 2 ) • H 2 O, [17] two dimensional layers in CuSb 6 O 8 (SO 4 ) 2 , [18] ASb(SO 4 ) 2 (A = K, Cs), [19] three dimensional framework in Sb 6 O 7 (SO 4 ) 2 , [20,21] Sb 4 O 4 (OH) 2 SO 4 , [22,23] , Sb 2 (SO 4 ) 2 (S 2 O 7 ), [24] RbSbSO 4 Cl 2 , [25] K 4 Sb(SO 4 ) 3 Cl. [26] Various types of linkage among the coordination polyhedra are adopted in these compounds.…”