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Article Abstract
The development of nonlinear optical (NLO) crystals with tailored properties has been a long-standing pursuit, yet remains challenging to achieve. Herein, we report the successful synthesis of a novel high-performance UV NLO material, Li[Be(OH)(CHO)]·7HO (LBOC), by substituting the [BO] functional building units (FBUs) in the classic β-BaBO (β-BBO) with meticulously designed [Be(OH)(CHO)] secondary building units (SBUs). The [Be(OH)(CHO)] SBUs within LBOC preserve the ordered arrangement of the [BO] FBUs found in β-BBO, enabling LBOC to inherit the strong second harmonic generation (SHG) response from β-BBO. Additionally, the increased dimensionality of the [Be(OH)(CHO)] SBUs, compared to the planar [BO] FBUs, leads to a reduction in optical anisotropy. Consequently, LBOC demonstrates a moderate birefringence of 0.067@589.3 nm, lower than that of β-BBO (0.118@589.3 nm). Notably, bulk crystals of LBOC can be easily grown using a straightforward solution evaporation method, making it a promising candidate for UV NLO applications. This strategic design of the SBU opens new avenues for the rational development of NLO crystals with tailored properties.
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