Abstract
Selected recent examples of coordination polymers (CPs) or metal-organic frameworks (MOFs) constructed from different multifunctional carboxylic acids with phenyl-pyridine or biphenyl cores have been discussed. Despite being still little explored in crystal engineering research, such types of semi-rigid, thermally stable, multifunctional and versatile carboxylic acid building blocks have become very promising toward the hydrothermal synthesis of metal-organic architectures possessing distinct structural features, topologies, and functional properties. Thus, the main aim of this mini-review has been to motivate further research toward the synthesis and application of coordination polymers assembled from polycarboxylic acids with phenyl-pyridine or biphenyl cores. The importance of different reaction parameters and hydrothermal conditions on the generation and structural types of CPs or MOFs has also been highlighted. The influence of the type of main di- or tricarboxylate ligand, nature of metal node, stoichiometry and molar ratio of reagents, temperature, and presence of auxiliary ligands or templates has been showcased. Selected examples of highly porous or luminescent CPs, compounds with unusual magnetic properties, and frameworks for selective sensing applications have been described.
Highlights
Among such building blocks in designing novel metal-organic networks [32,33]. Among such building blocks, building blocks, flexible ligands containing biphenyl and phenyl-pyridine cores with a varying flexible ligands containing biphenyl and phenyl-pyridine cores with a varying number and position number and position of carboxylic groups as well as distinct locations of N-pyridyl functionality have of carboxylic groups as well as distinct locations of N-pyridyl functionality have attracted a special attracted a special interest [34,35]
A substantial number of coordination polymers incorporating various kinds of a substantial number of coordination polymers incorporating various kinds of carboxylate ligands has been reported [56], the examples of heteroleptic networks constructed from carboxylate ligands has been reported [56], the examples of heteroleptic networks constructed a combination of two kinds of biphenyl or phenyl-pyridine carboxylate building blocks (Scheme 1)
In this mini-review, we featured selected recent examples of coordination polymers (CPs) or metal-organic frameworks (MOFs) that were constructed from various multifunctional carboxylic acids with phenyl-pyridine or biphenyl cores (Scheme 1)
Summary
Various crystalline metal-organic architectures (MOAs) including coordination polymers (CPs) or metal-organic frameworks (MOFs) have been an object of very intense research that spans from the fields of crystal design and engineering to chemistry of functional materials [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]. The main objective of the present work consists in highlighting selected recent examples of coordination polymers that were hydrothermally assembled from a series of multifunctional of coordination polymers that were hydrothermally assembled from a series of multifunctional carboxylic acids with phenyl-pyridine or biphenyl cores (Scheme 1). These carboxylic acids are still carboxylic acids with phenyl-pyridine or biphenyl cores (Scheme 1). The present study briefly discusses the general aspects of hydrothermal synthesis of selected coordination polymers derived from the aromatic carboxylic acids shown in Scheme 1.
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