Photoluminescence, magnetic and photocatalytic properties of three overlapping layered homochiral coordination polymers based on semi-rigid alanine ligands

Homochiral Porous Metal–Organic Frameworks Constructed from a V-Shaped Alanine Derivative Based on Pyridyl-Dicarboxylate

“…It is a usual synthesized approach for amino acid derivatives that the polycarboxylates as substitutional groups modify the amino groups of natural amino acids. Currently, linear, − V-shaped, ,, and triangular − amino acid derivatives have been researched for the fabrication of multifunctional HPMOFs. However, few HPMOFs incorporating permanent porosity and intriguing structures are reported. − Using the pyridyl-carboxylate unit instead of the common polycarboxylate group to decorate the natural amino acid has rarely been investigated. − Therefore, the application of pyridyl-carboxylate-amino acid derivatives for the construction of stable HPMOFs remains an unexplored field and affords great potential owing to diverse coordination patterns and plentiful coordination points in comparison to the usual polycarboxylate-amino acid derivatives.…”

Homochiral Helical Coordination Architectures Built from Biphenyl-Based Amino Acid Derivatives: Structural Diversity Tuned by Varying Conformation and Configuration of N-Donor Ligands, Sensing of Acidic Amino Acids, and Photoluminescence Properties

“…The Cu1 ion is located in a distorted {CuO 4 N} 9) Å. These binuclear units are connected by the pairwise BPBAla 2− anions to constitute a left-handed, doublestranded [Cu(BPBAla)] n helical chain with a 2 1 -screw axis and the helical pitch of 27.9217 (22) Å running along the c-axis (Figure 1b). Such a helical chain includes two [Cu 2 (COO) 2 (H 2 O)] binuclear units and two pairs of BPBAla 2− anions per turn to form a 1D left-handed helical channel (Figure 1b).…”

“…It is an effective synthetic strategy. − The integration of natural amino acids and polycarboxylates not only improves the structural rigidity of chiral amino acids and but also increases the variety of chiral organic linkers. The amino acid derivatives based on the different natural amino acids and multifarious polycarboxylates have been found in a number of homochiral CPs. − The structural difference of various natural amino acids and polycarboxylates may induce distinct and fascinating helical architectures. Meanwhile, the bifunctional groups of the −NH and the −CO moieties of amino acid derivatives could furnish two kinds of guest accessible active locations, which act as electron donors and acceptors, or act as the sites of Lewis acids and bases.…”

Homochiral Metal–Organic Frameworks Embedding Helicity Based on a Semirigid Alanine Derivative

“…A series of the natural chiral amino acids have been widely utilized as organic linkers to construct homochiral coordination polymers, which are inexpensive, nontoxic, and readily available. − However, natural amino acids are not ideal chiral ligands in the synthesis of HMOFs owing to their structure flexibility. In order to overcome this shortcoming, the functional groups (−NH 2 or −COOH) of amino acids modified by the suitable rigid benzoate units have been considered as an effective synthetic strategy to construct HMOFs. ,− …”

“…According to above-mentioned strategy, a chiral alanine derivative H 2 TMAla (Scheme ) has been synthesized by modifying the -NH 2 group of l -alanine with terephthalic acid in monosubstitution. Containing l -alanine and benzoate units, the H 2 TMAla is a semirigid chiral ligand and has been used in the fabrication of related homochiral coordination polymers. , This distinctive chiral ligand could furnish a new and feasible approach to design and construct HMOFs with fascinating helical architectures and outstanding properties. Additionally, to enhance the structural dimension and stability of HMOFs, the introduction of auxiliary N-donor ligands into metal-chiral coordination polymer systems would be an efficient method.…”