Li, Hai-Lou Lian, Chen Chen, Li-Juan Zhao, Jun-Wei Yang, Guo-Yu Two Ce<sup>3+</sup>-Substituted Selenotungstates Regulated by <i>N</i>,<i>N</i>‑Dimethylethanolamine and Dimethylamine Hydrochloride Two multi-Ce<sup>3+</sup>-substituted selenotungstates (STs), [HDMEA]­[H<sub>2</sub>N­(CH<sub>3</sub>)<sub>2</sub>]<sub>4</sub>­H<sub>3</sub>Na<sub>4</sub>­[Ce<sub>2</sub>(H<sub>2</sub>O)<sub>6</sub>­(DMEA)­W<sub>4</sub>O<sub>9</sub>­(α-SeW<sub>9</sub>O<sub>33</sub>)<sub>3</sub>]·26H<sub>2</sub>O (<b>1</b>) and [H<sub>2</sub>N­(CH<sub>3</sub>)<sub>2</sub>]<sub>10</sub>­H<sub>4</sub>Na<sub>10</sub>­[Ce<sub>2</sub>W<sub>4</sub>O<sub>9</sub>(H<sub>2</sub>O)<sub>7</sub>­(α-SeW<sub>9</sub>O<sub>33</sub>)<sub>3</sub>]<sub>2</sub>·63H<sub>2</sub>O (<b>2</b>), were prepared by the one-pot approach of sodium tungstate, sodium selenite, and lanthanide nitrate in an acidic water solution in the presence of <i>N</i>,<i>N</i>-dimethylethanolamine (DMEA) or dimethylamine hydrochloride (DMAHC). <b>1</b> was obained in the presence of DMEA, whereas <b>2</b> was synthesized in the presence of DMAHC. The trimeric polyoxoanion of <b>1</b> contains an unusual V-shaped [Se<sub>3</sub>W<sub>29</sub>O<sub>103</sub>]<sup>20–</sup> group embracing a prominent heterometal oxide fragment, [Ce<sub>2</sub>(H<sub>2</sub>O)<sub>6</sub>(DMEA)­W<sub>2</sub>O<sub>5</sub>]<sup>8+</sup>, and the hexameric polyoxoanion of <b>2</b> is constructed from two equivalent trimeric [Ce<sub>2</sub>W<sub>4</sub>O<sub>9</sub>(H<sub>2</sub>O)<sub>7</sub>(SeW<sub>9</sub>O<sub>33</sub>)<sub>3</sub>]<sub>2</sub><sup>24–</sup> subunits through two −O–W–O–Ce–O– linkages. The most worthy of attention is that the polyoxoanion of <b>1</b> can be approximatively viewed as a half of the polyoxoanion of <b>2</b> because of the coordination and blocking effect of DMEA. The stability of <b>1</b> and <b>2</b> in different water pH values was studied by electrospray ionization mass spectroscopy (ESI-MS), and the results manifest that <b>1</b> and <b>2</b> are stable in pH = 3.5–7.5 and 3.5–7.0, respectively. The oxidation reactions of aromatic sulfides catalyzed by H<sub>2</sub>O<sub>2</sub> were studied when <b>1</b> or <b>2</b> worked as a catalyst, and experimental results reveal that <b>1</b> or <b>2</b> can serve as available catalysts for the oxidation of aromatic sulfides under mild conditions. water pH values;hexameric polyoxoanion;sodium tungstate;dimethylamine hydrochloride;DMAHC;HDMEA;sodium selenite;sulfide;Dimethylamine Hydrochloride;ESI-MS;Substituted Selenotungstates Regulated;acidic water solution;electrospray ionization mass spectroscopy;SeW 9 O 33;Ce 2 W 4 O 9;presence;Na;trimeric polyoxoanion;Ce 2;equivalent trimeric;catalyst;DMEA;ST;one-pot approach;H 2 O 2;lanthanide nitrate;H 2 O;heterometal oxide fragment;oxidation reactions;Se 3 W 29 O 103 2019-06-17
    https://acs.figshare.com/articles/journal_contribution/Two_Ce_sup_3_sup_-Substituted_Selenotungstates_Regulated_by_i_N_i_i_N_i_Dimethylethanolamine_and_Dimethylamine_Hydrochloride/8283311
10.1021/acs.inorgchem.9b00582.s001