A boron imidazolate framework with mechanochromic and electrocatalytic properties. Issue 6 (13th September 2018)

• Record Type: Journal Article
• Authors: Wen, Tian; Zheng, Yao; Xu, Chaochen; Zhang, Jian; Jaroniec, Mietek; Qiao, Shi-Zhang
• Is Part Of: Materials horizons. Volume 5:Issue 6(2018)
• Page Start: 1151
• Page End: 1155
• Publication Date: 2018-09-13
• Subjects: Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8mh00859k
• Languages: English
• ISSNs: 2051-6347

Abstract

Abstract : An alkaline-stable anionic Cd(ii ) boron imidazolate framework (BIF-89 ) not only exhibits unique mechanochromic behavior, but also shows an enhanced oxygen evolution reaction (OER) catalytic activity due to the presence of uncoordinated −COO groups able to capture Fe at the atomic level. Abstract : A new alkaline-stable anionic boron imidazolate framework, CdB(im)4 (btec)0.5 ·H2 O (BIF-89, im = imidazolate, btec = benzene-1, 2, 4, 5-tetracarboxylate), was designed and synthesized. The resultingBIF-89 with a three-dimensional molecular structure exhibits a unique mechanochromic behavior with a maximum emission blue shift of about 23 nm in the blue emitting range. Additionally, the uncoordinated carboxylic groups in theBIF-89 framework can stabilize incorporation of Fe(iii ) at the atomic level to form Fe-immobilizedBIF-89 (Fe@BIF-89 ), which can serve as an effective electrocatalyst for the oxygen evolution reaction in strongly alkaline media. The newBIF-89 expands the field of MOFs to luminescence mechanochromism and electrocatalytic applications without involving precious metals.