Hui-Hua Song

Bio: Hui-Hua Song is an academic researcher from Hebei Normal University. The author has contributed to research in topics: Supramolecular chemistry & Ligand. The author has an hindex of 8, co-authored 23 publications receiving 175 citations.

A series of three-dimensional 3d–4f heterometallic coordination frameworks based on pyridinedicarboxylic acid

Abstract: Four new 3d–4f heterometallic coordination polymers [Cu3Eu2(2,5-pydc)6(H2O)12]·4(H2O) (1), [Zn2Eu2(2,5-pydc)5(H2O)2]·3(H2O) (2), and [Co3Ln2(2,6-pydc)6(H2O)6]·4(H2O) (Ln = Eu, 3; Dy, 4) (H2pydc = pyridinedicarboxylic acid) have been synthesized and characterized All of these compounds have extended 3D coordination frameworks containing supramolecular 1D channels, in which lattice water molecules are located Hydrogen bonds stabilize the 3D frameworks Additionally, a study of their fluorescence properties has indicated that compounds 1 and 2 show the characteristic transitions of Eu3+ Weak antiferromagnetic interactions are observed in compound 3

Two-Dimensional Metal-Organic Framework Materials: Synthesis, Structures, Properties and Applications.

Abstract: Among the recent developments in metal-organic frameworks (MOFs), porous layered coordination polymers (CPs) have garnered attention due to their modular nature and tunable structures. These factors enable a number of properties and applications, including gas and guest sorption, storage and separation of gases and small molecules, catalysis, luminescence, sensing, magnetism, and energy storage and conversion. Among MOFs, two-dimensional (2D) compounds are also known as 2D CPs or 2D MOFs. Since the discovery of graphene in 2004, 2D materials have also been widely studied. Several 2D MOFs are suitable for exfoliation as ultrathin nanosheets similar to graphene and other 2D materials, making these layered structures useful and unique for various technological applications. Furthermore, these layered structures have fascinating topological networks and entanglements. This review provides an overview of different aspects of 2D MOF layered architectures such as topology, interpenetration, structural transformations, properties, and applications.

Syntheses of Metal−2-(Pyridin-4-yl)-1H-imidazole-4,5-dicarboxylate Networks with Topological Diversity: Gas Adsorption, Thermal Stability and Fluorescent Emission Properties

Abstract: Six new metal−organic frameworks (MOFs), namely, {[Fe(HPIDC)(H2O)]·2H2O}n (1), [Cd(HPIDC)(H2O)]n (2), [Zn(HPIDC)(H2O)]n (3), {[Eu3(HPIDC)4(H2O)8]·NO3·4H2O}n (4), {[Tb3(HPIDC)4(H2O)8]·Cl·4H2O}n (5), and {[Y3(HPIDC)4(H2O)8]·Cl·4H2O}n (6), were hydrothermally synthesized and characterized (H3PIDC = 2-(pyridin-4-yl)-1H-imidazole-4,5-dicarboxylic acid). Single crystal X-ray diffractions show ligands H3PIDC are doubly deprotonated in all compounds, and the doubly deprotonated HPIDC2− coordinates in the μ3 or μ4 mode to generate 2D or 3D MOFs, displaying four coordination modes. Both 1 and 2 are 3D MOFs, but different in structure topologies. In 1 the ligand HPIDC2− and metal center Fe(II) act as 3-connected nodes to fabricate a (10,3) porous metal−organic net with 1D open channels where 1D zigzag water chains are reside through hydrogen-bonding interactions. This dehydrated porous material can absorb for N2, with a determined BET surface area of 9.07 m2 g−1. In 2, however, ligand HPIDC2− and metal center Cd(II)...

A series of 3D lanthanide frameworks constructed from aromatic multi-carboxylate ligand: structural diversity, luminescence and magnetic properties.

Abstract: Reactions of lanthanide(III) nitrates with multi-donor carboxylate ligand in the presence of oxalate anion afforded four new lanthanide coordination polymers with three dimensional (3D) frameworks, namely, {[Ln2(DPPA)2(μ2-C2O4)(H2O)2]·2H2O}n (Ln = Nd (1), Sm (2)) and [Ln2(HDPPA)2(DPPA)2]n (Ln = Tb (3), Yb (4)), (H3DPPA = 3-(4-hydroxyl pyridinium-1-yl) phthalic acid and H2C2O4 = oxalic acid). Compounds 1 and 2 are isostructural and isomorphous, featuring oxalate pillared binodal (4,5)-connected porous 3D framework with intersected 1D channels, in which the coordinated and lattice waters are accommodated. The complexes 3 and 4 are also isostructural, but featuring a (4,6)-connected 3D network based on a rectangular window composed of {Ln(HDPPA)}(+) extended anion chains, further interlinked by DPPA. The Tb(III) analogue exhibits intense characteristic green photoluminescence employing DPPA as an antenna. While Sm(III) compound 2 mainly involves ligand-to-ligand charge transfer. Variable-temperature susceptibility analyses of complexes 1 (Nd), 2 (Sm) and 3 (Tb) revealed that depopulation of the Stark levels together with weak antiferromagnetic interactions between the lanthanide ions lead to a continuous decrease in χ(M)T when the samples are cooled from 300 to 2 K.

Unveiling the additive-assisted oriented growth of perovskite crystallite for high performance light-emitting diodes.

Abstract: Solution-processed metal halide perovskites have been recognized as one of the most promising semiconductors, with applications in light-emitting diodes (LEDs), solar cells and lasers. Various additives have been widely used in perovskite precursor solutions, aiming to improve the formed perovskite film quality through passivating defects and controlling the crystallinity. The additive’s role of defect passivation has been intensively investigated, while a deep understanding of how additives influence the crystallization process of perovskites is lacking. Here, we reveal a general additive-assisted crystal formation pathway for FAPbI3 perovskite with vertical orientation, by tracking the chemical interaction in the precursor solution and crystallographic evolution during the film formation process. The resulting understanding motivates us to use a new additive with multi-functional groups, 2-(2-(2-Aminoethoxy)ethoxy)acetic acid, which can facilitate the orientated growth of perovskite and passivate defects, leading to perovskite layer with high crystallinity and low defect density and thereby record-high performance NIR perovskite LEDs (~800 nm emission peak, a peak external quantum efficiency of 22.2% with enhanced stability). Additives have been widely used for passivating defects in perovskite semiconductors, yet the role of additive and their interaction is not clear. Here, the authors reveal an additive-assisted crystal formation in FAPbI3 perovskite by tracking the chemical interaction in the precursor solution and crystallographic evolution using multi-functional additives.

Chiral Coordination Polymers with SHG-Active and Luminescence: An Unusual Homochiral 3D MOF Constructed from Achiral Components, Crystal Growth & Design, 2013, 13(6), 2650-2660.

Abstract: Six new coordination polymers, namely, [Cd(SO4)(4-abpt)(H2O)]n·3nH2O (1), [Cu3(CN)3(4-abpt)2]n (2), [Cd(D-cam)(2-PyBIm)(H2O)]n (3), [Co(D-Hcam)(cptpy)]n (4), [Cd(D-cam)(btmb)]n (5), and [Cd2(D-cam)(L-cam)(btmbb)]n (6) (4-abpt = 4-amino-3,5-bis(4-pyridyl)-1,2,4-triazole, D-H2cam = d-camphoric acid, 2-PyBIm = 2-(2-pyridyl)benzimidazole, Hcptpy = 4′-(4-carboxyphenyl)-3,2′:6′,3″-terpyridine, btmb = 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene, btmbb = 4,4′-bis(1,2,4-triazol-1-ylmethyl)-1,1′-biphenyl), have been synthesized under hydro(solvo)thermal conditions. Their structures were determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, infrared spectra, powder X-ray diffraction, circular dichroism, and thermogravimetric analysis. Complex 1 features a 3D porous metal–organic framework, which is a rare example to obtain a homochiral compound from achiral components. Complex 2 exhibits a 2D polymeric network constructed from μ2-cyanide, μ2-4-abpt, and monodentate 4-a...