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Mixed Co-based spinel oxides were synthesized via a simple MOF/MXene pyrolysis–reorganization strategy, which revealed that the coupling effect between Co3O4 and Co2TiO4 is crucial for improving OER activity.

The design of white-light phosphor is highly desirable for practical applications in SSL (solid-state lighting) and its related fields. Dye-loaded metal-organic frameworks (MOFs) have been widely demonstrated as one type of promising down conversion materials for WLEDs (white-light-emitting diodes), but two issues (dye leakage and inadequate quantum efficiency) require to be addressed before possible applications. Here, a series of single-phase dyes@In-MOF phosphors have been prepared in two different ways: the in-situ process and soaking method. The study of these dyes@In-MOF phosphors confirms the importance of this in-situ process that could effectively increase dye loading and quantum efficiency and greatly decrease dye leakage. As a result, a perfect WLED, fabricated using the in-situ-synthesized (AF/RhB@In-MOF)-3 (AF: Acriflavine; RhB: Rhodamine B) and 450 nm blue LED chip, exhibited a very high quantum yield (QY, up to 42.27%), a high luminous efficacy (LE) of 50.75 lm/W, a high color rendering index (CRI) of 91.2, and nearly identical Commission International ed'Eclairage (CIE) coordinates (0.33,0.31), indicating the potential application of the dye-loaded MOFs with good color quality in smart white LEDs.

An Oi-doped CdxZn1−xS solid solution with rich VS can trap holes and electrons for carrier separation to enhance photocatalytic activity.

Ar plasma technology tunes sulfur vacancies in polymetallic heterogeneous sulfide catalysts generated from MOG precursor to boost oxygen release.

Wheel-shaped molecular rings are one of the most striking types of molecular aggregations due to their naturally aesthetically appealing architecture, giant size and interesting physical properties and potential applications. Meanwhile,...

Tungsten ditelluride (WTe2) is provoking immense interest because of its unique electronic properties, but studies about its semiconducting hexagonal (2H) phase are quite rare. Herein, we report the synthesis of semiconducting 2H WTe2 nanosheets with large positive magnetoresistance, for the first time, by a simple lithium-intercalation-assisted exfoliation strategy. Systematic characterizations including high-resolution transmission electron microscopy, X-ray diffraction, and Raman and X-ray photoelectron spectroscopies provide clear evidence to distinguish the structure of 2H WTe2 nanosheets from the orthorhombic (Td) phase bulk counterpart. The corresponding electronic phase transition from metal to semiconductor is also confirmed by density of states calculation, optical absorption, and electrical transport property measurements. Besides, the 2H WTe2 nanosheets exhibit large positive magnetoresistance with values of up to 29.5% (10 K) and 16.2% (300 K) at 9 T. Overall, these findings open up a promising avenue into the exploration of WTe2-based materials in the semiconductor field.

Incorporating transition metal (TM) complexes into cluster-based chalcogenide frameworks is an effective synthetic strategy to induce structural diversity and control the optoelectronic properties, which may further improve their photocatalytic performance. However, limited studies have been conducted on frameworks constructed by TM complexes covalently bonded with supertetrahedral T

Exploring high-performance metal-organic frameworks (MOFs) for pseudocapacitors is quite meaningful for energy storage. Herein a bimetal NiCo-MOF with ultrathin thickness was prepared via a simple hydrothermal method, which shows excellent electrochemical performance with specific capacitances of 1945.83 and 1700.40 F/g at current densities of 0.5 and 1 A/g, respectively, while maintaining good stability. X-ray photoelectron spectroscopy and X-ray absorption near-edge spectroscopy spectra unravel that the strong coupling between Ni and Co species enhances the valence state of Ni2+ in the ultrathin nanosheets, which facilitates the charge transfer during the electrochemical reaction and results in greatly improved pseudocapacitive reactivity. This work provides guidance on the promising prospect of MOF materials for pseudocapacitor applications.

Designing novel multifunctional rare-earth metal-organic frameworks (MOFs) has attracted intensive attention. In particular, employing such materials for sensing or catalytic reactions is still very challenging. Here, a new 3D porous Eu(iii)-MOF, [Eu(cppa)(OH)]·xS (denoted as CTGU-19, S = solvent molecule, CTGU = China Three Gorges University), was synthesized by using 5-(4-carboxyphenyl)picolinic acid (H2cppa) as an organic ligand, and it shows a 3D (3,12)-connected topological net with the point symbol (420·628·818)(43)4, constructed from cubane-shaped tetranuclear europium building units. Interestingly, CTGU-19 can be used as a highly sensitive luminescent sensor to identify ornidazole (ODZ) and nitrofurantoin (NFT) at different excitation wavelengths. This result represents the first example of a lanthanide-metal-organic-framework (Eu-MOF) that can be employed as a discriminating fluorescent probe to recognize ODZ and NFT at different excitation wavelengths. Furthermore, after loading CTGU-19 with Ag and/or Au nanoparticles, the composites exhibit efficient catalytic performance for reducing 2-/3-/4-nitrophenols (2-/3-/4-NP), in which the unit mass reduction rate constants of Ag0.8Au0.2@CTGU-19 for 2-NP, 3-NP, and 4-NP reach 68.8, 53.80, and 52.34 s-1 g-1, respectively.

In this work, ultrathin MoS2 nanosheets (MoS2 NSs) with defect-rich structure were prepared and used as catalysts for the reduction of p-nitropheonol. Also, thanks to the defect sites, noble metal (Au, Ag, Pd, Pt) nanoparticles (NPs) can be successfully deposited on the MoS2 NSs via a facile and efficient one-step photochemical reduction process without the assistance of a stabilizer. The morphology and crystal structure of as-synthesized materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and N2 physisorption mearurements. Catalytic results demonstrate that as-prepared MoS2 NSs and noble metal modified MoS2 NSs (NM/MoS2 NSs) effectively catalyze the reduction of p-nitrophenol (p-NP) to p-aminophenol (p-AP) with NaBH4. The Pd/MoS2 NSs shows the best catalytic performance, exhibiting an apparent rate constant (κapp) of 0.386 min–1 even with moderate chemical stability. Interestingly, the...

Two isostructural Ln-MOFs, [H 2 N(CH 3 ) 2 ][Ln(cppa) 2 (H 2 O) 2 ] (Ln = Tb/Eu CTGU-1Tb /- 1Eu , H 2 cppa = 5-(4-carboxyphenyl)picolinic acid), were selected to investigate the effects of the different metal centre on the sensing properties. CTGU-1Eu can detect small organic molecule acetone and nitroaromatic explosives in water, whereas CTGU-1Tb can only detect explosive nitrophenol in water.

Herein, a highly stable luminescent heterometallic MOF, [NaEu2(TATAB)2(DMF)3]·OH (CTGU-7, H3TATAB = 4,4′,4′′-s-triazine-1,3,5-triyltri-m-aminobenzoic acid, DMF = N,N′-dimethylformamide, CTGU = China Three Gorges University), was synthesized. CTGU-7 crystallizes in a highly symmetric cubic framework with the pyrite-type topology, constructed from a novel Eu2Na trimeric cluster as a 6-connected node. Observably, this framework remains intact in a remarkably extensive environment such as in a common solvent and aqueous solutions. CTGU-7 is demonstrated to be the first known MOF for the selective detection of oridazole antibiotics. It also exhibits high selectivity and sensitivity for nitrophenol and benzyl alcohol. Thus, this material can potentially be used as a multi-responsive luminescent sensor.

A new metal–organic framework [Zn5(hfipbb)4(trz)2(H2O)2] (NNU-1) [H2hfipbb = 4,4′-(hexafluoroisopropylidene)bis(benzoic acid), Htrz = 1H-1,2,3-triazole] was assembled by hydrothermal synthesis. Single-crystal X-ray diffraction analysis reveals that NNU-1 displays a twofold interpenetrating three-dimensional (3D) framework with a {424·64}-bcu topology. Interestingly, the 3D framework contains a two-dimensional (2D) layered structure that consists of alternating left- and right-handed double helical chains. On the basis of the hydrophobic −CF3 groups from H2hfipbb ligand, NNU-1 possesses excellent stability in water. It is worth noting that NNU-1 not only shows a highly selective fluorescence quenching effect to Fe3+ ion in aqueous solution but also resists the interference of other metals including Fe2+ ion. Accordingly, NNU-1 probably functions as a potential promising fluorescence sensor for detecting Fe3+ ion with high sensitivity and selectivity.

A novel ytterbium metal–organic framework based on an unprecedented [Yb6(μ2-OH)2(μ3-OH)6]10 + cluster has been obtained and characterized, which shows a rare (3,12)-connected {32.4}2{38.422.524.610.72} topological net and strong near-infrared luminescent emission.

A rare Ni-ferromagnet [Ni(pdc)(bib)]·2H2O (H2pdc = pyridine-3,5-dicarboxylic acid, bib = 1,4-bis (imidazol-l-yl)butane) has been prepared, which possesses a 3D supramolecular network based on (3,5)-connected helical-armed 2D layers. Interestingly, at high temperature (> 12.7 K), 1 exhibits a weak ferromagnetism, whereas at low temperature, it shows unusual long-range ordering (LRO) behaviors combining spin canting and hysteresis loop.

Two low-dimensional Cu(I) boron imidazolate frameworks (BIFs), [CuBH(bim)3]n (BIF-40; bim = benzimidazolate) and [CuBH(im)3]n (BIF-6, im = imidazolate), have been synthesized and both of them display unique mechanochromism. In addition, BIF-40 showed reducing activity due to the rich B–H bonds in the structure, and it was employed to load AuPd bimetal nanoparticles through a one-step process for further catalysis. The corresponding mechanism involving a grinding process between chains or layers is discussed in detail. This work not only provides compelling evidence for designing and applying coordination polymers as mechanochromic materials, but also develops an eco-friendly strategy for loading bimetallic NPs into BIFs.

Improving the electrocatalytic performance of MOF materials has attracted great attention, among which more efforts have been devoted to introduce different transition metal elements to improve the performance of MOFs. However, the introduction of non-metallic elements is often overlooked. Herein, we have synthesized three new isostructural 2D polyhalogenated Co-MOFs [Co(X4-pta)(bpy)(H2O)2]n (X4-H2pta = tetrahalogenphthalic acid, X = F, Cl and Br, bpy = 4,4′-dipyridyl). To explore the influence of different halogen substituted isostructural Co(II)-based MOFs on electrochemical hydrogen evolution reaction (HER). Research shows that HER activity of pure Co–Cl4-MOF is distinctly superior to that of the pure Co–Br4-MOF and Co–F4-MOF. Notably, addition of acetylene black (AB) can improve the conductivity of pure Co-X4-MOFs, resulting in enhancing HER performance for the composites in an acidic medium. Among them, the AB&Co–Cl4-MOF(3:4) exhibits the best HER performance owing to its smaller overpotential of 283 mV at the current density of 10 mA cm-2, lower Tafel slope of 86mV·dec-1 and a long-term durability with a period of 24 h. The results demonstrate that introducing halogen elements into the MOFs is an efficient strategy for enhanced electrocatalytic HER.

Two new Co(II) metal-organic frameworks, namely [Co{sub 2}(bpm)(H{sub 2}O){sub 3}(L)]{sub n} (1) and ([Co(bpe)(H{sub 2}O)(H{sub 2}L)]·(bpe){sub 0.5}·(H{sub 2}O)){sub n} (2), (H{sub 4}L=1,1′:2′,1″-terphenyl-3,3″,4′,5′-tetracarboxylic acid, bpm=bis(4-pyridyl)amine, bpe=1,2-bis(4-pyridyl)ethene), have been obtained under hydrothermal conditions. Both complexes 1 and 2 have been characterized by elemental analysis, IR spectra, single-crystal X-ray diffraction, powder X-ray diffraction (PXRD), and thermogravimetric analysis (TGA). Complexes 1 and 2 consist of 1D Co(II) chains bridging by carboxylate groups in syn-anti fashion. 1 shows a novel 3D tri-nodal (4,6,10)-connected net with a (3.4{sup 3}.5{sup 2}){sub 2}(3{sup 2}.4{sup 14}.5{sup 12}.6{sup 12}.7{sup 4}.8)(3{sup 2}.4{sup 2}.5{sup 5}.6{sup 4}.7{sup 2}) topology. While 2 exhibits a 2D sql layer. Magnetic susceptibility measurements indicate that both 1 and 2 show weak antiferromagnetic interactions between the adjacent Co(II) ions in 300–8 K for 1 and 300–16 K for 2, respectively, and then 2 also displays ferromagnetic coupling at lower temperatures. - Graphical abstract: Two Co(II) coordination polymers with similar metal chain bridging by carboxylates in syn-anti fashion have been synthesized. Both 1 and 2 show weak antiferromagnetic interactions in high temperature, and then 2 also displays ferromagnetic coupling at lower temperatures. - Highlights: • Two Co(II) coordination polymers with similar metal chain bridging by carboxylates. • A novelmore » 3D (4,6,10)-connected net and a 2D sql layers. • A antiferromagnetic coupling at high temperature for 1 and 2. • A ferromagnetic coupling at lower temperature for 2.« less

A new 3D Ni(II)-MOF {[Ni3(ImhedpH)2(4,4′-bipy)]·4,4′-bipy·4H2O}n (1), based on 2-(1-imidazole)-1-hydroxyl-1,1′-ethylidenediphosphonate and 4,4′-bipyridyl, is presented, which possesses a (4,4)-connected frl-(42·64)4(64·82) network and shows ferrimagnetism and field-induced magnetic transition from ferrimagnetism to fully polarized state.

Reaction of NiII acetate and 4-methylphthalic acid (H2mph) with 1,2-bis(4-pyridyl)ethane (bpa) or 1,2-bis(4-pyridyl)ethene (bpe) affords two 3-D unusual metal–organic frameworks {[Ni(Hmph)2(bpa)(H2O)2][Ni2(mph)2(bpa)3]}n (1) and [Ni2(mph)2(bpe)2(H2O)3]n (2). 1 represents a polythreaded supramolecular architecture consisting of distinct 1-D armed chains and 2-D sql sheets based on the binuclear [Ni2(mph)2] units, however, 2 shows a rare 3-fold interpenetrating 103-ths network.

New porous anionic Ln-MOFs, namely, [Me2NH2][Ln(CPA)2(H2O)2] (Ln = Eu, Gd), have been prepared through the self-assembly of 5-(4-carboxy phenyl)picolinic acid (H2CPA) and lanthanide ions. They feature open anionic frameworks with 1-D hydrophilic channels and exchangeable dimethylamine ions. The Eu phase could detect Fe3+ ions with high selectivity and sensitivity in either aqueous solution or biological condition. The ratios of lanthanide ions on this structure platform could be rationally tuned to not only achieve dichromatic emission colors with linear correlation but also attain three primary colors (RGB) and even white light with favorable correlated color temperature. Furthermore, the Ag(I)-exchanged phases can be readily reduced to afford Ag nanoparticles. The as-prepared Ag@Ln-MOFs composite shows highly efficient catalytic performance for the reduction of 4-nitrophenol.

Through hydrothermal reactions, 4,4′-bipyridine (bpy) co-ligands firstly was introduce to CdII–H2FDC system (H2FDC = 9-fluorenone-2,7-dicarboxylic acid), generating a new coordination polymer {[Cd2(FDC)2(bpy)]∙H2O}n (1). Compound 1 has a pillar-layer 2-fold interpenetrating pcu network, based on the square-grid tetranuclear [Cd4(COO)8] units. Interestingly, 1 shows a blue-shifted photoemission, as well as enhanced fluorescence lifetime compared with the pure H2FDC ligand.

Based on two positional isomers of phenylenedioxydiacetate ligands and different N-containing co-ligands, six novel coordination polymers, formulated as {[Zn(o-PDOA)(bpp)]·2H2O}n (1), {[Cd(o-PDOA)(bix)]·3H2O}n (2), [Cd(m-PDOA)(bix)]n (3), [Cd(m-PDOA)(bib)]n (4), [Zn(m-PDOA)(bix)]n (5), {[Zn(m-PDOA)(bib)]·2H2O}n (6), (o/m-H2PDOA = 1,2/1,3-phenylenedioxydiacetic acid; bix = 1,4-bis(imidazol-ylmethyl)benzene; bib = 1,4-bis(1H-imidazol-1-yl)-butane; bpp = 1,3-bis(4-pyridyl)propane), have been synthesized under hydrothermal conditions. Compound 1 features a three-dimensional (3D) 2-fold interpenetrating cds topology. In 2, the (H2O)6 clusters interlink the 1D double [Cd2(o-PDOA)2(bix)2]n chains into a 3D supramolecular network. Compound 3 is a (3,5)-connected 2D layer with (42.6)(42.67.8) topology. Compound 4 exhibits a 3-fold interpenetrating pcu topological network, while, 5 is a 2D puckered meso-helical 44-sql layer built by alternately arranged right-handed and left-handed helical chains. In contrast to 1–5, compound 6 possesses a 1D loop-like chain and, interestingly, rare D4 tetrameric (H2O)4 cluster extends the chains into a 3D supramolecular framework. Moreover, the thermal stabilities and luminescent properties of compounds 1–6 have also been investigated.

In order to further design and successfully prepare for the functional metal-organic framework materials, it is essential to understand the fundamental correlations between the composition, physical properties and topology of the underlying nets. In this review, we focus on recent advances in metal-organic frameworks (MOFs) that possess more common non-zeotype 4-connected topological nets (such as sql , kag , nbo , lvt , cds , qtz , dia , lon , pts , etc.), and discuss the synthetic strategies of non-zeotype 4-connected MOFs and their related properties. In particular, we emphasize how to establish basic design principles and synthetic methodology to construct the same topological MOFs with different functions using specifically designed organic linkers.

Five new coordination polymers, namely, [Mn(2,2′-bipy)(H2O)2(H2L1)]n (1), {[Co(btb)(H2O)2(H2L1)]·0.5H2O}n (2), [Co(bib)(H2O)2(H2L1)]n (3), [Ni2(bpm)(H2O)3(L2)]n (4), and {[Co2(H2O)3(OH)(HL2)]·H2O}n (5), (H4L1 = 1,1′:2′,1′′-terphenyl-4,4′,4′′,5′-tetracarboxylic acid, H4L2 = 1,1′:2′,1′′-terphenyl-3,3′′,4′,5′-tetracarboxylic acid, 2,2′-bipy = 2,2′-bipyridine, btb = 1,4-bis(1,2,4-triazol-1-yl)butane, bib = 1,4-bis(imidazol-1-yl)butane, bpm = bis(4-pyridyl)amine), have been obtained under hydrothermal conditions. Complex 1 exhibits a 3D supramolecular framework based on 1D chains. Both complexes 2 and 3 are 3D supramolecular frameworks constructed from 1D zig-zag chains. Complex 4 features a 3D tetra-nodal (3,4,4,5)-connected architecture containing 1D μ-COO bridged chains with (5(2)·6(2)·7.9)(5(2)·6(4)·7(3)·8)2(5(2)·6)2(6(3)·7(2)·9) topology. Complex 5 shows a 3D penta-nodal (3,4,4,6,6)-connected net containing 1D μ-OH/μ-COO bridged chains and mononuclear Co(II) nodes with a (4(2)·6(3)·8)(4(3))2(4(4)·6(2))2(4(4)·6(6)·8(5))2(4(4)·6(7)·8(4)) topology. Variable-temperature magnetic susceptibility measurements reveal that complexes 2 and 3 show antiferromagnetic interactions between the adjacent Co(II) ions, whereas 4 is a ferromagnetic system.

A unique pentacopper(II) cluster-based 3-D coordination framework, [Cu5(nip)4(μ3-OH)2-(dps)2(H2O)4]n, has been prepared by hydrothermal reaction of Cu(II) with 5-nitroisophthalic acid (H2nip) and 4,4′-dipyridylsulfide ligands (dps), which exhibits a 6-connected pcu net and coexistence of antiferromagnetic and ferromagnetic couplings.

Two novel Co(II)-cluster-based coordination polymers--namely, [Co5(μ3-OH)2(1,4-ndc)4(bix)2]n (1) and {[Co8(μ3-OH)4(1,4-ndc)6(btp)(H2O)6]·H2O}n (2)--were prepared by hydrothermal reactions of Co(II) perchlorate with 1,4-naphthalenedicarboxylic acid (1,4-H2ndc) and different N-donor coligands (bix = 1,4-bis(imidazol-1-ylmethyl)benzene and btp = 4,4'-bis(triazol-1-ylmethyl)biphenyl). In 1, 10-connected [Co5(μ3-OH)2(COO)8] clusters are extended by the μ4-1,4-ndc(2-) and trans-bix ligands to construct a rare, self-penetrating ile framework that can interestingly be regarded as the cross-link of two interpenetrating 6-connected pcu networks. While for 2, [Co8(μ3-OH)4(COO)12] clusters serve as the 8-connected nodes, which are bridged by the μ4/μ5-1,4-ndc(2-) and trans-btp ligands to afford the highest-connected uninodal self-penetrating (4(20).6(8)) network based on octacobalt clusters. A synthetic and structural comparison of 1 and 2 demonstrates that the features of auxiliary N-donor ligands play a key role in governing the in situ formed clusters and the final 3-D coordination frameworks. Magnetic susceptibility measurements indicate that complex 1 shows an antiferromagnetic interaction between the adjacent Co(II) ions, whereas 2 displays the dominant antiferromagnetic exchanges in 300-50 K and a ferrimagnetic-like behavior at lower temperatures.

A new 3D [Co4(μ3-OH)2] cluster-based coordination framework, involving two different dicarboxylates ndc2 − and adc2 − along with secondary N-donor spacer bip, was prepared, which displays a rare 8-connected self-penetrating ilc net that can interestingly be regarded as the crosslink of two interpenetrating 6-connected pcu networks. In addition, the thermal stability and magnetic property of 1 were also investigated.

A novel CdII-coordination framework [Cd(C4O4)(btb)(H2O)2]n (1) constructed by squaric acid (H2C4O4) and secondary N-donor spacer 1,4-bis(1,2,4-triazol-4-yl)butane (btb) is presented, which displays 2D → 3D inclined polycatenate framework consisting of two of sets of equivalent 2D 44-sql layers and (4,6)-connected self-catenated H-bonding topology. In addition, the thermal stability and photo-luminescence property of 1 were also investigated.

Three new fluorous coordination polymers with a fluorinated carboxylate tecton and N-donor co-ligands, {[Zn2(hfipbb)2(phen)2]·2H2O}n (1), [Zn2(hfipbb)2(bipy)(H2O)]n (2), and [Zn5(hfipbb)4 (Hhfipbb)2 (bpp)]n (3), [H2hfipbb = 4,4′-(hexafluoroisopropylidene)bis(benzoic acid), phen = 1,10-phenthroline, bipy = 4,4′-bipyridine, and bpp = 1,3-bi(4-pyridyl)propane], have been prepared and characterized by elemental analysis, IR spectra, and X-ray diffraction. Compound 1 exhibits a 3D supramolecular network assembled from two independent 1D chain motifs [Zn(hfipbb)(phen)] through π⋯π stacking, and C–H⋯F and O–H⋯O interactions. Compound 2 features 2D undulating layer structure with 44-sql network. Whereas, in compound 3, pentanuclear [Zn5(η2-O)2(μ2-η1:η1-CO2)]2− cores are bridged by hfipbb2− and bpp ligands into a 3D 6-connected sxd framework with a point symbol of (33·46·55·6). The diverse arrangements of the compounds show the modulation of the heterocyclic N-donor co-ligands can suitably mediate the coordination requirement of metal centers as well as the binding modes of fluorinated carboxylate tecton, which consequently generate diverse crystalline architectures. In addition, the properties of thermogravimetric analysis, X-ray powder diffraction, and photoluminescent behaviors of the compounds have also been discussed.

An unprecedented 2D coordination polymer with unique (3,4)-connected self-catenated topology, arising from the parallel interlocking of 1D loop chains via shared binuclear subunits, were prepared from CdII, 5-nitroisophthalic acid and 4,4′-dipyridylamine. The thermal stability and photoluminescence property as well as the photocatalytic performance of 1 were also examined, and the results indicated that 1 shows photocatalytic activity for dye degradation under UV light.

Self-penetrating coordination networks have recently been demonstrated as an important family of coordination polymers with new topologies and properties. However, the design and control of self-penetrating systems is still an enthralling challenge. In this review, we present the topological types of self-penetrating coordination networks, mainly with single-connectivity, and summarize their designing and constructing strategy.

A series of 2D Ln-organic coordination frameworks (Ln = Sm3+ for 1, Eu3+ for 2, Tb3+ for 3, and Ho3+ for 4) with (4,6)-connected (44.52)(44.5.6)(44.54.66.7) topology has been constructed, in which 1D zigzag chains and 2D (4,4) networks intertwine mutually into the unusual 1D and 2D mixed self-weaving patterns. Interestingly, due to the lanthanide contraction effect, the 9-coordinated geometries of the Ln(III) ions gradually transform from triangle tetrakaidecahedron (Sm3+ and Eu3+), to a three-capped triangle prism (Eu3+ and Tb3+), and then to a single-capped anti-square prism (Ho3+).

A 3D CoII metal-organic framework, {[Co4(Hbpbc)2(4,4′-bipy)(H2O)4]·3H2O}n (1), based on a new penta-carboxylate(H5bpbc = biphenyl-2,4,6,3′,5′-pentacarboxylic acid) and 4,4′-bipyridine is presented. In 1, each μ7-Hbpbc4 − anion links five [Co2] SBUs to generate a 3D 5-connected noy net. Further, 4,4′-bipy ligands compensate for the need of Co2 coordination to regulate noy net into a 3D (5,6)-connected tcj/hc framework. Besides, the thermal stability and magnetic property of 1 were also investigated.

A novel 3D coordination framework [Pb2(hfipbb)2(bpp)]n (1) [H2hfipbb = 4,4′-(hexa-fluoroisopropylidene)bis(benzoic acid), bpp = 1,3-bis(4-pyridyl)propane] based on inorganic rod-shaped infinite Pb–O–Pb chain is presented, which possesses a new (4,5)-connected network topology and shows high thermal stability and strong photoluminescence at room temperature.

A new CdII-coordination polymer, namely, [Cd3(nbtc)2·4H2O]n (1), has been hydrothermally synthesized with in situ generated 5-nitrobenzene-1,2,3-tricarboxylate (nbtc3−) ligand. Single-crystal X-ray diffraction study reveals that compound 1 is constructed from trinuclear CdII clusters and exhibits a previously unknown 2D (3,4,9)-connected (3.42)(32.43.5)(36.411.510.68.8) topology as well as 3D H-bonding pillared architecture. In addition, the photoluminescent property and thermal stability of 1 were also discussed.