A new 3 D {Na2Cu3}-substituted polyoxometalate: synthesis, structure and its photocatalytic and electrochemical properties. Issue 17 (14th August 2020)

• Record Type: Journal Article
• Authors: Sun, Jun-Jun; Wang, Yue-Lin; Li, Xu-Yan; Yang, Guo-Yu
• Is Part Of: Journal of coordination chemistry. Volume 73:Issue 17/19(2020)
• Page Start: 2499
• Page End: 2510
• Publication Date: 2020-08-14
• Subjects: Polyoxometalates -- hydrothermal synthesis -- heterometallic cluster -- photocatalytic activity -- semiconductor behaviors; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2020.1805601
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: A new 3 D polyoxometalate, H7 K3 [Na2 Cu3 (H2 O)(B-α-SbW9 O33 )2 ]·8H2 O (1 ), has been hydrothermally made and characterized by IR spectroscopy, thermogravimetric analyses, powder X-ray diffraction and single crystal X-ray diffraction analysis. 1 crystallizes in the tetragonal system, space group P -421 m, with a = 16.7532(7) Å, b = 16.7532(7) Å, c = 13.8335(11) Å and Z = 2. Structure analysis reveals that the polyanion in 1 consists of two B-α-SbW9 O33 ({SbW9 }) units sandwiched by a U-shaped {Na2 Cu3 } cluster made by two Na + and three Cu 2+ ions. The most prominent structural feature of 1 is that the [Na2 Cu3 (H2 O)(B-α-SbW9 O33 )2 ] 10– ({Na2 Cu3 (SbW9 )2 }) units are connected to construct a 2 D network through Cu–O = W bridges. To the best of our knowledge, 1 represents the first sample with an unclosed central belt between two {SbW9 } fragments. Furthermore, neighboring 2 D networks connect by K + cations to form a 3 D framework. The semiconductor behavior, electrochemical properties and photocatalytic activities have been investigated, showing excellent photocatalytic and electrocatalytic activities for the photodegradation of MB/RhB and bromate reduction. Graphical Abstract: