A Layered Aluminophosphate [C₁₇H₂₁N₂]₃[Al₃(PO₄)₄]·5H₂O with Fluorescent Property Derived from Carbazolyl-Modified Template

Abstract

Designing and innovating organic structure-directing agents is the key to synthesizing novel molecular sieve structures. Herein, we design a novel carbazolyl-modified template and further synthesize a two-dimensional layered aluminophosphate with [C17H21N2]3[Al3(PO4)4]·5H2O (denoted as ZHKU-2). ZHKU-2 is composed of AA-stacked [Al3P4O16]3– layers constructed from alternating AlO4 and PO3(=O) tetrahedrons to form a 4.6.8 network featured by capped six-ring secondary building units. Carbazolyl-templated ZHKU-2 exhibits strong purple fluorescence with a high quantum yield of 25.98%. This work expands aluminophosphate materials of the [Al3P4O16]3– family and provides a view for synthesizing new molecular sieves by exploring the organic luminescence structure–directing agents.