| Supramolecular coordination polymer has been subjected to extream studies in recent years due to their applications in material science, chemical catalysis, pharmaceutical industry etc. The non-covalent bonding interactions such as strong-, weak-hydrogen bonding,π-πstacking, van der Waals interaction and hydrophobic interactions are main concepts in supramolecular chemistry.In recent studies, two betaine derivatives 1,5-bis(3-carboxypyridinium)-N- methyl-diethylamine (L1) and 1,5-bis (4-carboxypyridinium)-N-methyl-diethylamine (L2), which bears two naked carboxylate groups and a pair of byridyl rings, are adoped as organic building blocks allowed to interact with various metal ions constructing coordination-hydrogen bonding supramolecules. Nine compounds, namely ({[ZnL1(SCN)2 ]·H2O}n(1),{H3L1(ClO4)2(PF6)}n(2),{[CdL1Cl2]·H2O}n(3),{[Pb8L110(ClO4)16]·14H2O}n(4),{[La2L14(ClO4)6]·8H2O}n(5),{[MnL2Cl2]·2H2O}n(6),{ZnL2(SCN)2}n(7),{[Ag4L22(CF3SO3)4]·11H2O}n(8),{[CdL2(OAc)2]·H2O}n(9))have been prepared and characterized by IR-spectrum. Furthermore, their crystal and molecular structures have been successfully determined by single crystal X-ray diffraction structure analysis method.The results indicate that: (1) the carboxylate groups in L1 and L2 in above compounds exhibit a variety of coordination modes, especially in 4; (2) anions play important roles in balancing the charge of the resulting compounds, ligating to the metal ions, filling the voids in the coordination-hydrogen bonding framework, etc; (3) ligands in isomeric forms have significant influences on the topology of the resulting network structures; (4) in most cases, the topology of the supramolecular networks are the results of synergic interactions of coordination, hydrogen bonding andπ-πstacking interaction etc. |
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