Issue 27, 2013
From the journal:

CrystEngComm

Positional isomeric and substituent effect on the assemblies of a series of d10 coordination polymers based upon unsymmetric tricarboxylate acids and nitrogen-containing ligands†

Ting Liu,a   Suna Wang,*a   Jing Lu,a   Jianmin Dou,a   Meiju Niu,a   Dacheng Lia  and  Junfeng Bai*b  

* Corresponding authors

a Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, P. R. China
E-mail: wangsuna@lcu.edu.cn
Tel: +86-0635-8230669

b State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, P. R. China
E-mail: bjunfeng@nju.edu.cn
Tel: +86-025-83593384

Abstract

Seven novel compounds, {[Zn2(L1)2]·2H2N(CH3)2·DMF}n (1), {[Cd2(L1)2]·2H2N(CH3)2·DMF}n (2), [Zn(HL2)(bpe)]n (3), [Zn2(HL2)2(bpea)2(H2O)]n (4), {[Cd2(HL2)2(bpe)(H2O)2]·2H2O}n (5), {[Cd2(HL2)2(bpea)(H2O)2]·2H2O}n (6) and {[Zn(HL3)(bpea)]·2H2O}n (7), were constructed based on three unsymmetrical tricarboxylate ligands and nitrogen-containing ligands (H3L1 = biphenyl-3,4′,5-tricarboxylic acid, H3L2 = biphenyl-3,3′,5-tricarboxylic acid, H3L3 = biphenyl-3-nitro-5,3′,5′-tricarboxylic acid, bpe = 1,2-bi(4-pyridyl)ethylene, bpea = 1,2-bi(4-pyridyl)ethane) under hydrothermal conditions. The positional isomeric and substituent effects of these ligands lead to fascinating structures. Compounds 1 and 2 afford 3D (3,6)-connected (4.62)2(42.610.83) rutile topologies based on dinuclear M2(CO2)2 SBUs. Compounds 3 and 4 are 4-connected diamondoid nets, which exhibit unusual roto-translational [2 + 2]-fold and common 4-fold interpenetration due to the different weak interactions among each interpenetrating motif, respectively. Compounds 5 and 6 are isostructural, both presenting 2D unique undulated (3,4)-connected (42.6)(42.63.8) topologies. Compound 7 possesses a 2D → 3D parallel polycatenation framework composed of (4,4) undulated sheets. The effects of the positions of the carboxylate groups and the substituent groups on the aromatic rings, the flexibility of the N-containing coligands as well as the coordination geometry of the metal centers are discussed in details. The fluorescence properties and thermal stability of the ligands and compounds have also been performed.

Graphical abstract: Positional isomeric and substituent effect on the assemblies of a series of d10 coordination polymers based upon unsymmetric tricarboxylate acids and nitrogen-containing ligands

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Article information

DOI
https://doi.org/10.1039/C3CE40583D
Article type
Paper
Submitted
03 Apr 2013
Accepted
02 May 2013
First published
02 May 2013

CrystEngComm, 2013,15, 5476-5489

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Positional isomeric and substituent effect on the assemblies of a series of d10 coordination polymers based upon unsymmetric tricarboxylate acids and nitrogen-containing ligands

T. Liu, S. Wang, J. Lu, J. Dou, M. Niu, D. Li and J. Bai, CrystEngComm, 2013, 15, 5476 DOI: 10.1039/C3CE40583D

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