Synthesis, growth, structural, thermal and optical properties of diguanidinum hydrogen phosphate monohydrate (G2HP) crystal for NLO applications

Regulating Guanidinium-Based Hybrid Materials for Ultraviolet Nonlinear Optical Applications by Hybrid Strength and Hybrid Pattern

“…In this way, GU-based hybrid crystals can exhibit the excellent NLO performance similar to urea, while maintaining good physical−chemical stability of ionic crystals. Quite a few GU-based hybrid NLO materials in the solar-blind region have been reported, such as GUI (UV absorption edge λ UV ∼ 260 nm), 16 GUBF 4 (∼201 nm), 17 GUClO 4 (∼250 nm), 18 GU 2 HPO 4 •H 2 O (∼242 nm), 19 GUCCl 3 COO (∼263 nm), 20 GU 2 PO 3 F (∼200 nm), 21 and recently reported GUSO 3 F (∼200 nm). 22 Considering their relatively easier growth conditions compared with inorganic crystals, the GUbased materials are expected to obtain a larger-size crystal with relatively lower production costs.…”

Yin–Yang Complementarity Strategy Achieving Giant Optical Anisotropy in a Metal-free Birefringent Material C(NH2)3(HC4O4)

“…36 (2) The 2− ions. 38,39 The UV−vis diffuse reflectance spectrum of the title compound was measured in the range of 185−800 nm. The absorption data (K/S) were calculated from the reflection spectrum using the Kubelka Munk formula, F(R) = K/S = (1 − R) 2 /(2R).…”

“…The stretching and bending vibrations of C–C, C–O, and C–N bonds can be observed at 1518, 1359, 1073, and 554 cm –1 . The absorption centered at 1518 cm –1 is produced by the overlap of C–O and C–C bond stretching vibrations in HC 4 O 4 , which is characteristic of salts of C n O n 2– ions. , …”