A Reversibly pH-Switchable Open/Closed Cage Constructed from Triangular Polyoxometalate Hybrid [(C7H7AsO3)6W12O36]12- Cluster Anions Exhibiting Supramolecular Chirality

Hao Yuan; Wei-Dong Yu; Shuang Liang; Jun Yan

doi:10.1021/acs.inorgchem.8b00084

A Reversibly pH-Switchable Open/Closed Cage Constructed from Triangular Polyoxometalate Hybrid [(C₇H₇AsO₃)₆W₁₂O₃₆]^12- Cluster Anions Exhibiting Supramolecular Chirality

Inorg Chem. 2018 Apr 16;57(8):4234-4238. doi: 10.1021/acs.inorgchem.8b00084. Epub 2018 Apr 2.

Authors

Hao Yuan¹, Wei-Dong Yu¹, Shuang Liang¹, Jun Yan^{1

2}

Affiliations

¹ School of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China.
² Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources , Central South University , Changsha 410083 , Hunan , China.

PMID: 29608055
DOI: 10.1021/acs.inorgchem.8b00084

Abstract

A new nanosized polyoxometalate modified by benzylarsonate ligands, [(C₇H₇AsO₃)₆W₁₂O₃₆]^12- (1a), was successfully isolated and structurally characterized as Na₂(C₂H₈N)₄H₆[(C₇H₇AsO₃)₆W₁₂O₃₆]·30H₂O (1). Controlled protonation of 1a led it to self-reorganize into isomer cage cluster [(C₇H₇AsO₃)₆W₁₂O₃₀(OH)₄(H₂O)₂]^4- (2a) with an organic ligand arranging in "half-open" mode. The reversibly switchable cage transform was monitored by ¹H NMR. Also, the origin of the solid supramolecular chirality in the crystal 1 and the aggregation process of 1a were preliminarily studied.