(C3N6H7)BF4·H2O and (C3N6H7)SO3CH3·H2O with large birefringence induced by coplanar π-conjugated [C3N6H7]+ groups,Inorganic Chemistry Frontiers

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(C3N6H7)BF4·H2O and (C3N6H7)SO3CH3·H2O with large birefringence induced by coplanar π-conjugated [C3N6H7]+ groups
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2024-07-04 , DOI: 10.1039/d4qi01061b
Hangwei Jia ₁ , Die Xu ₁ , Zijian Li _{1,

2} , Muhammad Arif _{1,

2} , Yansheng Jiang ₁ , Xueling Hou _{1,

2}

Affiliation

Birefringent crystals are vital to modern optical devices as they can effectively modulate the polarization of light. Currently, limited by comprehensive properties such as crystal size and birefringence, the design and synthesis of birefringent crystals are challenging, especially in the short-wavelength spectral region. Herein, (C₃N₆H₇)BF₄·H₂O and (C₃N₆H₇)SO₃CH₃·H₂O were successfully synthesized, and they exhibit large birefringence and short UV cutoff edges (0.37/0.31 at 546 nm and 244/233 nm). Notably, the crystal of (C₃N₆H₇)BF₄·H₂O synthesised using a facile solvent growth method is over 20 mm in length. Theoretical analysis suggests that the parallel arrangement of [C₃N₆H₇]⁺ groups modulated by tetrahedral units induces large optical anisotropy. This work provides promising candidates with exceptional properties for short-wavelength ultraviolet applications.

中文翻译：

(C3N6H7)BF4·H2O 和 (C3N6H7)SO3CH3·H2O 由共面 π 共轭 [C3N6H7]+ 基团引起的大双折射

双折射晶体对于现代光学器件至关重要，因为它们可以有效地调制光的偏振。目前，受晶体尺寸和双折射等综合性能的限制，双折射晶体的设计和合成具有挑战性，特别是在短波长光谱区域。这里，(C ₃ N ₆ H ₇ )BF ₄ ·H ₂ O 和 (C < b5> N ₆ H ₇ )SO ₃ CH ₃ ·H ₂ O成功合成，它们表现出大的双折射和短的紫外截止边缘（546 nm 和 244/233 nm 处为 0.37/0.31）。值得注意的是，合成了(C ₃ N ₆ H ₇ )BF ₄ ·H ₂ O晶体使用简便的溶剂生长方法，长度超过 20 毫米。理论分析表明，四面体单元调制的[C ₃ N ₆ H ₇ ] ⁺ 基团的平行排列会产生较大的光学各向异性。这项工作为短波长紫外线应用提供了具有卓越性能的有前途的候选材料。

更新日期：2024-07-06

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