From Discrete Complexes to Metal–Organic Layered Materials: Remarkable Hydrogen Bonding Frameworks

Abstract

A series of metal–organic coordination complexes based on alkaline-earth metal centers [Mg(II), Ca(II), and Ba(II)] and the ligand 5-aminoisophthalate (aip2−) revealed notable structural diversity, both in the materials’ dimensionality and in their hydrogen bonding networks: [Mg(H2O)6]∙[Mg2(Haip)(H2O)10]∙(Haip)∙3(aip)∙10(H2O) (1) and [Mg(aip)(phen)(H2O)2]∙(H2O) (2) were isolated as discrete complexes (0D); [Ca(aip)(H2O)2]∙(H2O) (3), [Ca(aip)(phen)(H2O)2]∙(phen)∙(H2O) (4), and [Ba2(aip)2(phen)2(H2O)7]∙2(phen)∙2(H2O) (5) revealed metal–organic chain (1D) structures, while the [Ba(aip)(H2O)] (6) showed a metal–organic layered (2D) arrangement. Furthermore, most of these metal–organic coordination materials revealed interesting thermal stability properties, being stable at temperatures up to 450 °C.

Multidimensional Ln-Aminophthalate Photoluminescent Coordination Polymers

“…The multiple examples of CPs prepared using isophthalic acid derivatives and their versatile application, combined with our recent research interests in the design and development of multifunctional crystalline materials [ 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ], justify our motivation in the preparation of a series of LnCPs. Herein, four LnCPs, based on 5-aminoisophthalic acid (H 2 aip − , Scheme 1 ), prepared by hydrothermal (HT) or microwave-assisted synthesis (MWAS) methods, are reported.…”

Alkaline earth-organic frameworks with amino derivatives of 2,6-naphthalene dicarboxylates: structural studies and fluorescence properties

“…[38][39][40][41][42] Amino functionalized aromatic dicarboxylates are of particular interest for MOF synthesis as they can lead to materials with increased CO 2 adsorption 43 and favorable fluorescence 44 and photocatalytic [45][46][47][48] properties. However, the chemistry of amino functionalized MOFs is largely dominated by the 2-amino-1,4-benzenedicarboxylate (NH 2 BDC 2− ) and 5-amino-1,3-dicarboxylate ligands and their derivatives 43,49 with only relatively few examples involving ligands with longer naphthalene or biphenyl spacers. 47,[50][51][52][53][54][55][56][57][58] In this contribution, we report the synthesis and structural and photophysical study of AEMOFs 1-8 (Scheme 1) which are based on the amino-substituted dicarboxylic bridging ligands 4-aminonaphthalene-2,6-dicarboxylate (ANDC 2− ) 55 and 4,8-diaminonaphthalene-2,6-dicarboxylate (DANDC 2− ).…”