Na(CHN)[Zn(PO)(HPO)]: A Short-Wave Ultraviolet Open-Framework Zincophosphate Exhibiting Substantial Optical Dispersion Ability.

The exploration of short-wave ultraviolet (SUV; λ < 280 nm) transparent phosphates with substantial birefringence is crucial for the advancement of SUV laser industry. Despite their SUV transparency and potential for constructing materials with large birefringence, open-framework (OF) phosphates have rarely been explored for their birefringent properties. Herein, through a systematic exploration in this field, a new ethylenediamine-based OF zincophosphate, Na(CHN)[Zn(PO)(HPO)] (NEZPO), has been developed.

From K[ZnBPO] to K[(ZnAl)PO]: Substitution-Induced Microporous Zincoaluminophosphate with a Congruent-Melting Behavior.

An open-frame aluminophosphate, K[(ZnAl)PO] (KZAPO), was rationally designed by a substitution design strategy and synthesized by a high-temperature molten salt method. Compared with the parent crystal of K[ZnBPO], KZAPO was characterized by similar 4 × 8 × 8 networks, a comparable short-wave ultraviolet transparency and a more regular tetrahedral frame with the mixing of (ZnO) and (AlO) anionic groups, highlighting the multifunctional roles that anionic group mixing played in structural and property modulations. In particular, KZAPO was characterized by a high thermal stability (over 850 °C) and a congruent-melting behavior, being conducive to practical applications.