Strategically designed deep-ultraviolet optical crystals with balanced properties by small heteroatom substitution

Synergistic integration of [SO 3 NH 2 ] and [C(NH 2 ) 3 ] via small heteroatom substitution balances properties. α-C(NH 2 ) 3 SO 3 NH 2 ( P 2 1 / c : 190 nm, 0.068@546 nm) and β-C(NH 2 ) 3 SO 3 NH 2 ( Iba 2: 190 nm, 1.41 × KDP, 0.074@546 nm) were successfully synthesized.