A highly stable, luminescent and layered zinc(II)-MOF: Iron(III)/copper(II) dual sensing and guest-assisted exfoliation

• Published in: Chinese chemical letters Vol. 31; no. 9; pp. 2211 - 2214
• Main Authors: Qian, Xiu, Deng, Siyu, Chen, Xiang, Gao, Qiang, Hou, Yun-Long, Wang, Aiwu, Chen, Lizhuang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2020; School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China%School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China; Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, China%Center for Advanced material Diagnostic Technology, Shenzhen Technology University, Shenzhen 518118, China
• Subjects: Exfoliation; Fluorescence titration; LMOF; MONs; Tyndal scattering; Tyndal scattering; MONs; LMOF; Fluorescence titration; Exfoliation
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2019.09.024

A blue-light emitting MOF with high stability and layered structure was studied for Cu2+/Fe3+ sensing and guest-assisted chemical exfoliation. [Display omitted] A highly stable and luminescent metal-organic framework (LMOF) with layered structure, namely, C6H4N5OZn (1) has been successfully achieved and fully characterized by single crystal X-ray diffraction, powder X-ray diffractions, fluorescence titration and thermogravimetry. This blue-light emitting compound 1 exhibit outstanding stability and can detect Fe3+ and Cu2+ in water specifically, presenting potential application in the field of fluorescent probe technology. Fluorescence titration experiments indicate that the detection of Fe3+ ions by 1 is more significant than that of Cu2+ ions in terms of Ksv value. Furthermore, guest-assisted exfoliation of layered MOF 1 is efficiently carried out through ether OH hydrogen bond or π···π interactions between the layered host structure and intercalated guest molecules (4,4′-oxybisbenzoic acid and triphenylamine). Tyndal scattering was observed in the suspensions of obtained MOF nanosheets. This study shows that the compound 1 with unique metal ion sensing properties can be applied as a probe material in water pollution treatment field, but also opens up the opportunity for synthesizing luminescent MONs through the “bottom-up” guest intercalation methodology.