Text this: <b>Synthesis, structure and photoluminescence of (HgCl<sub>3</sub>)<sub><i>n</i></sub> (C<sub>6</sub>NO<sub>2</sub>H<sub>6</sub>)<sub><i>n</i></sub>(C<sub>6</sub>NO<sub>2</sub>H<sub>5</sub>)n•<i>n</i>H<sub>2</sub>O</b>