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

作者：Xiu Qian; Siyu Deng; Xiang Chen; Qiang Gao; Yun-Long Hou; Aiwu Wang; Lizhuang Chen^*

来源：Chinese Chemical Letters, 2020, 31(09): 2211-2214.

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 O—H 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.

• 单位
  深圳技术大学