Na(C₂H₁₀N₂)₂[Zn₃(PO₄)₂(H_0.5PO₄)]₂: A Short-Wave Ultraviolet Open-Framework Zincophosphate Exhibiting Substantial...

Area of Science:

• Materials Science
• Crystallography
• Optics

Background:

• Short-wave ultraviolet (SUV) transparent materials with high birefringence are essential for advancing SUV laser technology.
• Open-framework (OF) phosphates are largely unexplored for their birefringent properties, despite their potential for SUV transparency.

Purpose of the Study:

• To systematically investigate the birefringent properties of ethylenediamine-based open-framework zincophosphates.
• To develop novel SUV-transparent optical materials for laser applications.

Main Methods:

• Synthesis and characterization of a new ethylenediamine-based OF zincophosphate, Na(C2H10N2)2[Zn3(PO4)2(H0.5PO4)]2 (NEZPO).
• Evaluation of NEZPO's optical properties, including SUV transparency and birefringence.

Main Results:

• NEZPO demonstrates remarkable transparency in the short-wave ultraviolet region.
• The synthesized crystal exhibits significant birefringence (Δn = 0.060 at 546 nm).

Conclusions:

• NEZPO represents a promising new material for SUV optical applications.
• This study highlights the potential of open-framework phosphates in developing benign SUV crystals.