Author
Sujin Seo
Bio: Sujin Seo is an academic researcher from Gyeongsang National University. The author has contributed to research in topics: Coordination polymer & Iodide. The author has an hindex of 3, co-authored 6 publications receiving 28 citations.
Papers
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TL;DR: NMR titration and comparative NMR data indicate a relatively higher coordination affinity of Cd(II) toward the macrocycle than occurs for Hg(II), in parallel to the situation observed in the solid state.
Abstract: Homo- and heteronuclear group 12 metal (Zn2+, Cd2+, and Hg2+) complexes 1–6 containing a newly designed 18-membered N2O2S2 macrocycle incorporating two pyridine subunits (L) were prepared and structurally characterized. The individual complexes isolated exhibit unusual stoichiometries, geometries, oxidation states, and structural topologies and include an infinite mercurous complex and a heteronuclear dumbbell-shaped complex. Both the Zn(II) complex [Zn(L)][ZnBr4] (1) and the Cd(II) complex [Cd(L)Br2] (2) are mononuclear, with the metal ion located inside the macrocyclic cavity. The six-coordinated Zn(II) center in 1 adopts an octahedral geometry and is shielded from the anion and solvent by the strongly bound macrocycle. The Cd(II) center in 2 is seven-coordinate, being bound equatorially to two N donors, two O donors, and a S donor from the macrocycle and axially to two bromide ions on opposite sides of the macrocyclic plane, adopting a pentagonal-bipyramidal geometry. In the Hg(II) complexations, the c...
15 citations
TL;DR: In this paper, a review of synthetic strategies for constructing heterometal polymers along with a discussion of the diverse structural arrays that have been shown to result is presented, along with an overview of the structural arrays used.
12 citations
TL;DR: A combination of pillar[5]-bis-trithiacrown (L) and mercury(ii) halides afforded a monomer complex, a 1-D coordination polymer and a supramolecular ion-triplet complex [(I·Hg·I)@L] (I--form).
7 citations
TL;DR: In this article, Mole-ratio dependent formations of the macrocyclic silver(I) complexes with different coordination modes and topologies were reported, and the use of three equivalents or above amount of AgPF6 afforded a one-dimensional (1-D) coordination polymer.
Abstract: Mole-ratio dependent formations of the macrocyclic silver(I) complexes with different coordination modes and topologies are reported. When one equivalent of AgPF6 was reacted with an N2O2S2-macrocycle (L), a typical endocyclic monomer complex [Ag(L)]PF6 (1) was isolated. Moreover, the use of three equivalents or above amount of AgPF6 afforded a one-dimensional (1-D) coordination polymer {[Ag4(L)2](PF6)4·2CH2Cl2}n (2a), in which the endocyclic monomer complex units are linked by different silver(I) atoms outside the macrocyclic cavity to form a unique endo/exocyclic infinite chain via the –endoAg–S–exoAg–S– bond linkages. Upon removal of the dichloromethane molecules in the crystal lattice of 2a in ambient conditions, conversion of the coordination geometry of the exocyclic Ag atom from linear (2a) to trigonal plane (2b, desolvated product) as well as sliding of the 1-D chains were observed in a single-crystal-to-single-crystal manner.
4 citations
TL;DR: The complexation of an NO2S2 macrocycle with CdI2 offers an opportunity to identify the kinetic and thermodynamic products via visual methods because the direct observation and structural characterization of each product were available from sequential snapshots, single-crystal X-ray structures and powderX-ray diffraction patterns.
1 citations
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TL;DR: In this paper , a review of advances made in anion complexation in the years 2019 and 2020 is presented, including self-assembly, sensing, anion separation, transport, catalysis, and fundamental advances in recognition systems.
Abstract: This review covers advances made in anion complexation in the years 2019 and 2020. Included here are developments in self-assembly, sensing, anion separation, transport, catalysis, and fundamental advances in anion recognition systems. This review covers advances made in anion complexation in the years 2019 and 2020. Included here are developments in self-assembly, sensing, anion separation, transport, catalysis, and fundamental advances in anion recognition systems.
42 citations
TL;DR: The current status of a special subclass of metal phosphonates is introduced, namely, metal-metalloligand phosphonate (MMPs), including synthetic strategies, crystal structures, and properties of those based on paddlewheel diruthenium, metallo-polyazamacrocycle, metalloporphyrin and meetingallo-tris-bipyridine ligands.
34 citations
TL;DR: In this article , the authors present the first potassium chloride-selective heteroditopic ion-pair receptor, which is shown to be remarkably sensitive to local electronic environments, including redox-switchable on/off anion binding and sensing capability.
Abstract: Chalcogen bonding (ChB) is rapidly rising to prominence in supramolecular chemistry as a powerful sigma (σ)-hole-based noncovalent interaction, especially for applications in the field of molecular recognition. Recent studies have demonstrated ChB donor strength and potency to be remarkably sensitive to local electronic environments, including redox-switchable on/off anion binding and sensing capability. Influencing the unique electronic and geometric environment sensitivity of ChB interactions through simultaneous cobound metal cation recognition, herein, we present the first potassium chloride-selective heteroditopic ion-pair receptor. The direct conjugation of benzo-15-crown-5 ether (B15C5) appendages to Te centers in a bis-tellurotriazole framework facilitates alkali metal halide (MX) ion-pair binding through the formation of a cofacial intramolecular bis-B15C5 M+ (M+ = K+, Rb+, Cs+) sandwich complex and bidentate ChB···X– formation. Extensive quantitative 1H NMR ion-pair affinity titration experiments, solid–liquid and liquid–liquid extraction, and U-tube transport studies all demonstrate unprecedented KCl selectivity over all other group 1 metal chlorides. It is demonstrated that the origin of the receptor’s ion-pair binding cooperativity and KCl selectivity arises from an electronic polarization of the ChB donors induced by the cobound alkali metal cation. Importantly, the magnitude of this switch on Te-centered electrophilicity, and therefore anion-binding affinity, is shown to correlate with the inherent Lewis acidity of the alkali metal cation. Extensive computational DFT investigations corroborated the experimental alkali metal cation–anion ion-pair binding observations for halides and oxoanions.
20 citations
TL;DR: In this paper, a series of chalcogen, halogen and hydrogen bonding heteroditopic macrobicyclic cryptands are reported and their potassium halide ion-pair recognition properties investigated.
Abstract: A series of chalcogen, halogen and hydrogen bonding heteroditopic macrobicyclic cryptands are reported and their potassium halide ion-pair recognition properties investigated. Saliently, the co-bound potassium cation was determined to be crucial in switching on the bromide and iodide recognition properties of the respective cryptand receptor. Importantly, the nature of the sigma-hole mediated interaction employed in the anion recognition component is demonstrated to significantly augment the ion-pair binding behaviour, markedly so for the halogen bonding analogue. Most notably the incorporation of a chelating chalcogen bonding donor motif significantly improves the selectivity towards KBr over KI, relative to halogen and hydrogen bonding analogues.
20 citations
TL;DR: In this paper, the basic concepts and synthetic strategies leading to various types of supramolecular polymers with chelated units, including linear, branched, cross-linked, and heterometa...
Abstract: This article summarizes the basic concepts and synthetic strategies leading to various types of supramolecular polymers with chelated units, including linear, branched, cross-linked, and heterometa...
19 citations