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Issue 44, 2016
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Construction of six new luminescent Ln(III)–Zn(II) heterometallic coordination polymers based on heterometallic secondary building units

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Abstract

Six new d–f heterometallic Ln(III)–Zn(II) coordination polymers (CPs), namely, {[EuZn(NIPH)1.5(INC)(H2O)(OH)]·0.5H2O}n (1), [LnZn(NIPH)2(INC)(H2O)]n [Ln = Eu (2), Tb (3)], [EuZn2(NIPH)2.5(INC)2]n (4) and [LnZn(NIPH)2(NC)(H2O)]n [Ln = Eu (5), Tb (6)] [H2NIPH = 5-nitroisophthalate, HINC = isonicotinate, and HNC = nicotinate], were obtained under hydrothermal conditions. All the compounds are based on well-defined heterometallic secondary building units (SBUs). Compound 1 is a 3D network with pcu topology, which was generated from tetragonal tetranuclear heterometallic [Eu2Zn2(NIPH)4(INC)2(OH)2] SBUs connected by NIPH2− and INC ligands. Compounds 2 and 3 are isostructural and exhibit 3D heterometallic frameworks with bcu topology constructed by the linkage of 2D layers containing linear tetranuclear heterometallic [Eu2Zn2(NIPH)6(INC)2] SBUs and INC anions. Compound 4 possesses 7-connected 3D frameworks with the Schläfli symbol of (33·411·56·6) constructed by the interconnection of linear trinuclear heterometallic [EuZn2(NIPH)4(INC)4] SBUs, NIPH2− ligands and INC anions. In compounds 5 and 6, 3D networks are formed through the linkage among linear tetranuclear [Ln2Zn2(NIPH)8(NC)2] SBUs, NIPH2− ligands and NC anions. All the compounds represent examples of 3D lanthanide–transition heterometallic–organic coordination polymers with two types of metal ions and two organic carboxylates. Furthermore, their solid-state fluorescence properties have been investigated at room temperature.

Graphical abstract: Construction of six new luminescent Ln(iii)–Zn(ii) heterometallic coordination polymers based on heterometallic secondary building units

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Publication details

The article was received on 22 May 2016, accepted on 10 Oct 2016 and first published on 10 Oct 2016


Article type: Paper
DOI: 10.1039/C6CE01184E
Citation: CrystEngComm, 2016,18, 8672-8682
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    Construction of six new luminescent Ln(III)–Zn(II) heterometallic coordination polymers based on heterometallic secondary building units

    S. Zheng, J. Tan, S. Cai, J. Fan and W. Zhang, CrystEngComm, 2016, 18, 8672
    DOI: 10.1039/C6CE01184E

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