Hydrothermal assembly, structures, topologies, luminescence, and magnetism of a novel series of coordination polymers driven by a trifunctional nicotinic acid building block

Abstract

Thirteen new coordination compounds of diverse dimensionality were generated from 5-(4-carboxyphenoxy)nicotinic acid (H2cpna) as a main trifunctional building block.

New Topologically Unique Metal-Organic Architectures Driven by a Pyridine-Tricarboxylate Building Block

“…In contrast, CP 1 and MOF 2 show more intense emission peaks with maxima at 374 (λex = 318 nm) and 376 nm (λex = 348 nm), respectively. This observation suggests that the emission bands in 1 and 2 are similar to those of the free H3cpta ligand, allowing their assignment to the intraligand π-π* or n-π* transitions [16,24,40].…”

“…The Pb1 atom is seven-coordinate and has a distorted {PbN 2 O 5 } geometry, which is completed by a pair of phen N atoms and five carboxylate O donors from four distinct cpta 3− moieties. The Pb2 center is also seven-coordinate and possesses a distorted {PbO 7 } geometry, which is taken by seven O donor atoms from five different cpta 3 [21,22,40]. In 1, the cpta 3− blocks behave as two different µ 6 -and µ 5 -spacers (modes I and II, Scheme 1), in which the COO − groups exhibit the monodentate, bidentate, or bridging tridentate modes.…”

Synthesis and crystal structure of a 6-chloronicotinate salt of a one-dimensional cationic nickel(II) coordination polymer with 4,4′-bipyridine

“…Aromatic carboxylic acids with additional functional groups have become popular in the design of coordination polymers. The main reasons are the many possible and unpredictable coordination modes of this type of ligand and their affinity for participation in supramolecular interactions (Gu et al, 2016(Gu et al, , 2017(Gu et al, , 2018Wang et al, 2016;Zhang et al, 2019).…”

Synthesis, Structural Features, and Catalytic Activity of an Iron(II) 3D Coordination Polymer Driven by an Ether-Bridged Pyridine-Dicarboxylate

“…The use of polycarboxylic acid ligands that combine different functional groups represents an interesting research direction for designing new types of coordination polymers or metal-organic frameworks (MOFs) [20][21][22]. Following our continuous interest in exploring new or poorly studied multicarboxylic acids for the design of CPs [23][24][25][26][27][28][29][30], in this work we selected a trifunctional nicotinic acid derivative, 5-(4'-carboxyphenoxy)nicotinic acid (H 2 cpna) as a main building block. Selection of H 2 cpna can be justified by the following points.…”

“…(3) H 2 cpna is still barely investigated for synthesis of CPs or MOFs. In fact, a search of the Cambridge Structural Database shows that there are only several examples of Zn, Cu, Ni, Co, Mn, Cd, and Pb coordination polymers assembled from H 2 cpna; some of them revealed interesting catalytic [8], sensing [11], gas sorption [21], luminescent [11,27], and magnetic [27] properties. Notable examples include a 2D Co(II) CP [Co(µ 3 -cpna)(phen)(H 2 O)] n •nH 2 O {phen, 1,10-phenanthroline} applied as a heterogeneous catalyst for alcohol oxidation [8], a Tb 3+ -doped 3D Cu(II) MOF [Cu(µ 3 -cpna) 2 ] n used as a luminescent probe for sensing H 2 S [11], and a 2D porous framework [Cu(µ 3 -cpna)(Me 2 NH)] n •nDMF•nH 2 O {DMF, dimethylformamide} with remarkable CO 2 sorption behavior in addition to single-crystal to single-crystal transformation features [21].…”