Negatively charged (WO₄)²⁻ anions doped into 2D layered metal organic frameworks bismuth terephthalate provides a valuable strategy for excellent photoreduction of Cr(vi).

Doping multiple halide anions into bismuth terephthalate can effectively improve photocatalytic activities. The F^–, Cl^–, Br^– codoped hybrids exhibit excellent photocatalytic activities on RhB and salicylic acid.

The synthesis of the pyridazine-bridged expanded rosarin 1 and a reduced precursor, semi-rosarinogen 2, is reported; both provided a colorimetric response when exposed to thiols.