Zn/Cd/Cu- frameworks constructed by 3,3‧-diphenyldicarboxylate and 1,4-bis(1,2,4-triazol-1-yl)butane: Syntheses, structure, luminescence and luminescence sensing for metal ion in aqueous medium
Abstract
Three metal-organic frameworks (MOFs), [M(dpdc)(btb)0.5]n (M = Zn 1, Cd 2; dpdc = 3,3‧-diphenyldicarboxylate and btb = 1,4-bis(1,2,4-triazol-1-yl)butane) and [Cu3(dpdc)3(btb)2]n (3) were prepared and structurally determined. 1 is a 2D structure with the topology of {33·47·54·6}, while 2 possesses a 3D framework with the {312·429·514} topology. Complex 3 displays a 3D framework with the topology of {315.435.55}2{36.48.512.6.7}. 1-2 exhibit intense blue luminescence and high stability in water, which make them highly promising candidates as sensors using in aqueous medium. Complex 1 is a potential bi-functional chemosensor for Fe3+ and Al3+ ions while 2 displays a selective sensing ability to Fe3+ ion. Quenching mechanism of Fe3+ on the luminescence of 1-2 is attributed to the charge transfer process LMCT. 1 and 2 have same compositions but have different structures, thermally stabilities and different luminescence sensing functions. The relationship between MOF structures and luminescence sensing toward metal ions are further discussed.
- Publication:
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Journal of Solid State Chemistry France
- Pub Date:
- February 2018
- DOI:
- 10.1016/j.jssc.2017.12.005
- Bibcode:
- 2018JSSCh.258..744Z
- Keywords:
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- Transition metal-organic framework;
- Structure;
- Luminescence