Sql Topology Research Articles

Non-covalent interactions induced supramolecular architecture of Hg(NCS)2 with 3-pyridinecarbaldehyde nicotinoylhydrazone

In this work we have synthesized and characterized a new HgII complex [Hg(HL)(NCS)2]2, fabricated from Hg(NCS)2 and 3-pyridinecarbaldehyde nicotinoylhydrazone (HL). Single-crystal X-ray crystallography reveals the formation of a dinuclear heteroleptic discrete structure with half of the molecule, [Hg(HL)(SCN)2], in the asymmetric unit. The ligand HL coordinates the HgII center in an unexpected monodentate fashion via the pyridine nitrogen of the nicotinic moiety. Molecules are aggregated through intermolecular N–H∙∙∙N hydrogen bonds and additional weak Hg∙∙∙N interactions. Molecules of complex aggregate into a 2D supramolecular layer with a four-connected uninodal sql (Shubnikov tetragonal plane net) topology due to intermolecular N–H∙∙∙N hydrogen bonds. When the Hg∙∙∙N interactions are excusively considered, a similar layer is formed revealing a three-connected uninodal hcb (Shubnikov hexagonal plane net) topology. Further considering both the intermolecular N–H∙∙∙N hydrogen bonds and Hg∙∙∙N interactions, the structure of complex can be extended into a 3D supramolecular framework with an eight-connected uninodal bcu (body centered cubic) topology. We have also applied DFT calculations as well as MEP, QTAIM, NCI and NBO analyses to shed light on interactions in the crystal structure of the complex. Among others, reciprocal n → π* interactions between the nitrogen lone pairs and empty antibonding π* C–N orbitals of the NCS– anions have been determined.

A new two-fold interpenetrating two-dimensional copper(II) coordination polymer constructed from 4,4′-bis(2-methylimidazol-1-yl)diphenyl ether

Abstract A new Cu(II) metal-organic framework, [Cu(BMIOPE)(Br-BDC)] n (1) [Br-H2BDC = 5-bromo-isophthalic acid, BMIOPE = 4,4′-bis(2-methylimidazol-1-yl)diphenyl ether], has been hydrothermally synthesized and characterized through IR spectroscopy, elemental and thermal analysis, and single-crystal X-ray diffraction. Complex 1 possesses a unique two-fold interpenetrating two-dimensional framework with sql topology. The photocatalytic property of complex 1 for oxidative degradation of methyl orange and methylene blue with hydrogen peroxide was examined under UV irradiation.

Synthesis, structures, and photocatalytic properties of three new nickel(II) coordination polymers containing bis(benzimidazole) ligands with different coordination architectures

Three new nickel(II) coordination polymers with the formulas of {[Ni(L)(5-HIP)]·H2O}n (1), [Ni(L)(2,6-NDC)]n (2) and [Ni(L)(OBA)]n (3) were synthesized under solvothermal conditions employing 1,4-bis(benzimidazol-1-yl)-2-butylene (L) and aromatic dicarboxylic acids ligands (5-H2HIP = 5-hydroxyisophthalic acid; 2,6-H2NDC = 2,6-naphthalenedicarboxylic acid; H2OBA = 4,4’-oxybis(benzoic acid)). 1 displays an unusual 3D (3,6)-connected framework with the Schläfli symbol of {63}{67.83}, 2 features a 3D 3-fold interpenetrated sqc6 network, 3 possesses a 2D 2-fold interpenetrated network with sql topology. 1 ~ 3 present highly photodegradation efficiency for methylene blue under UV irradiation.

Structure-Directing Effects of Coordinating Solvents, Ammonium and Phosphonium Counterions in Uranyl Ion Complexes with 1,2-, 1,3-, and 1,4-Phenylenediacetates.

The three isomers 1,2-, 1,3-, and 1,4-phenylenediacetic acids (1,2-, 1,3-, and 1,4-pdaH2) have been used to synthesize 16 uranyl ion complexes under solvo-hydrothermal conditions and in the presence of various coligands and organic counterions. The two neutral and homoleptic complexes [UO2(1,2-pda)]·CH3CN (1) and [UO2(1,3-pda)] (2) crystallize as diperiodic assemblies with slightly different coordination modes of the ligands, but the same sql topology. Introduction of the coordinating solvents N-methyl-2-pyrrolidone (NMP) or N,N'-dimethylpropyleneurea (DMPU) in the uranyl coordination sphere produces the four complexes [UO2(1,2-pda)(DMPU)] (3), [UO2(1,3-pda)(NMP)] (4), [UO2(1,4-pda)(NMP)] (5), and [UO2(1,4-pda)(DMPU)] (6), which are either monoperiodic (4) or diperiodic species with the fes (3 and 5) or 3,4L13 (6) topology. The presence of dimethylammonium cations is associated with the formation of ladder-like monoperiodic polymers with the 1,2 isomer in the complexes [H2NMe2]2[(UO2)2(1,2-pda)3]·H2O (7) and [H2NMe2]2[(UO2)2(1,2-pda)3]·3H2O (8), while a conformational change giving the 1,3 and 1,4 isomers a pincer-like geometry favors the formation of dinuclear ring subunits assembled into daisy-chain-like monoperiodic polymers in [H2NMe2]2[(UO2)2(1,3-pda)3]·0.5H2O (9), [H2NMe2]2[(UO2)2(1,4-pda)3] (10), and the mixed-ligand species [H2NMe2]2[(UO2)2(1,2-pda)(1,4-pda)2] (11). The unique complex including guanidinium cations, [C(NH2)3]2[(UO2)2(1,2-pda)3]·0.5H2O·CH3CN (12), crystallizes as a diperiodic polymer with the hcb topology. Due to differences in ligand conformations, the phosphonium-containing complexes [PPh3Me]2[(UO2)2(1,3-pda)3] (13) and [PPh4]2[(UO2)2(1,4-pda)3] (14) contain ladder-like and daisy-chain-like monoperiodic polymers, respectively, while only the latter geometry is found in the mixed-cation complexes [PPh3Me][H2NMe2][(UO2)2(1,4-pda)3]·H2O (15) and [PPh3Me][H2NMe2][(UO2)2(1,2-pda)(1,4-pda)2] (16). The influence of ligand conformation and the structure-directing effects of coligands and counterions throughout the series are discussed. The uranyl emission spectra of 14 of the complexes display the usual vibronic fine structure, the peak positions being dependent on the number of equatorial donors.

Metal-organic frameworks based on flexible bis(imidazole) and dicarboxylic ligands and their applications as selective sensors for magnesium nitrate

Three new MOFs, namely {Co2(Bbi)2(A)2·H2O}n (1), {Co(Bbi) (B)2·4H2O)}n (2) and {Cd6(Bbi)1.5(L)6·5H2O}n (3) [Bbi = 1,1′-(1,4-butanediyl)bis(imidazole), H2L = (anthracene-9,10-endo-succinic acid), H2A = (benzopheno-4,4-dicarboxylic acid), H2B = (1,2-diethyl ether-4,4′-dibenzoic acid)], have been constructed through hydrothermal synthesis. 1 exhibits a double interpenetrating 3D to 3D cds topology network with point symbol of {65.8}. 2 forms a large 3D channel by ligand Bbi connected 2D adjacent waveform layers, displaying 4-connected net with sql topology defined by the point symbol of {44·62}. A rare hexa-nuclear Cd cluster can be observed in the structure of 3 with a Schläfli symbol of {42·6}2{43·103}{43·6·82}{43·63}{44·62}2{45·62·82·10}{46}4. TG analyses indicate the highly thermal stability of 1–3. More importantly, MOFs 1–3 can be developed as fluorescent sensors, which show high selectivity towards magnesium nitrate among various metal nitrates in CH3CN by fluorescence quenching, presenting as promising candidates for chemical sensing.

A Two-Dimensional Coordination Polymer Formed from Cobalt(II) and an Extended Dipyridyl Ligand

The synthesis of the extended dipyridyl ligand 4,4′-(2,5-dimethyl-1,4-phenylene)dipyridine (L) in an improved yield via the palladium catalysed Suzuki coupling of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (1) and 1,4-dibromo-2,5-dimethylbenzene (2) is reported along with its use to form a two-dimensional coordination polymer [Co2L2(OAc)4(H2O)2]n. The coordination polymer consists of one-dimensional chains of octahedral cobalt ions bridged by acetate ligands which are connected to form two dimensional sheets with square lattice (sql) topology via the dipyridyl ligands (L). The structure contains small voids totalling ~6.6% of the unit cell volume. The crystal structures 1, L, L·2H2O, and L·2HNO3 are also reported.

Two dimensional (2D) molecular frameworks for rapid and selective adsorption of hazardous aromatic dyes from aqueous phase

Herein, two dimensional metal organic frameworks, [M(ox)(bpy)]n [H2ox = oxalic acid, bpy = 4,4′-bipyridine and M = Cu (1) or Co(2)] are designed under solvothermal condition and characterized thoroughly by FTIR, PXRD, TGA and single crystal X-ray studies. X-ray structure along with topological analysis reveals a two dimensional (2D) framework of the present material with sql topology with metals in square bipyramidal geometry. The two MOFs are employed for adsorption of organic dyes i.e. methylene blue (MB) and methyl orange (MO) considered widely as water pollutants. Interestingly, the molecular frameworks showed selective nature towards methylene blue, the cationic dye. The framework remains stable after adsorption of dye and can be recycled up to five times. At equilibrium, the removal percentage of MB by the frameworks is ultimate (96–98%) with optimum temperature (25 °C) and pH (neutral). The kinetic studies are suggestive of the adsorption to proceed via pseudo second order reaction. The key factors or mechanism for enhanced adsorption of MB are electrostatic, π-π and hydrogen-bonding interactions existing between the 2D sheets and the dye. Thus, fine structural tuning of the easy-to-prepare two dimensional frameworks could lead to adsorb and remove the hazardous organic aromatic pollutants with high efficiency at low cost in future endeavours.

Synthesis of two isostructural Zn-CPs and their fluorescence sensing for Cr (VI) ion and nitrofurantoin in aqueous medium

Two isostructural Zn (II) luminescent coordination polymers (CPs), namely, [Zn(tptc)0.5(bpy)]n (1) and [Zn(tptc)0.5(pyp)]n (2) {H4tptc ​= ​p-terphenyl-2,2″,5″,5‴-tetracarboxylic acid, bpy ​= ​2,2′-bipyridine, pyp ​= ​3-(pyrid-2-yl) pyrazole} were synthesized under solvothermal conditions and characterized by single-crystal X-ray diffraction, elemental analysis, Infrared spectra, powder X-ray diffraction, thermogravimetric analysis. The structural analysis of Zn-CPs shows that they are isostructural and present 2D sheet structures with 4-connected {44.62}-sql topology, which are further expanded into 3D supermolecular structures by H-bonding interaction. Furthermore, the luminescent experiments revealed that CPs 1 and 2 show highly sensitive and selective sensing for CrO42−/Cr2O72− anions and nitrofurantoin in aqueous medium.

Synthesis, Structure and Photocatalytic Dye Degradation Ability of Co(II)-Based Coordination Polymers

Two Co(II)-based coordination polymers: {Co(L1)(bimb)·H2O·OH}n (1) and [Co(L2)(bidpe)]n (2) (H2L1 = 4-mercaptobenzoic acid, H2L2 = 4,4′-bis(thiomethylene) dibenzoic acid, bimb = 1,4-bis(imidazol-1-ylmethyl)benzene), bidpe = 4,4′-bis(imidazolyl)diphenyl ether), were synthesized under the condition of solvothermal and characterized by X-ray single-crystal diffraction, elemental analysis, IR spectra and thermogravimetric analysis (TGA). X-ray single-crystal diffraction analysis exhibits that 1 and 2 belong to the monoclinic crystal system, space group P21 and Cc. Complex 1 adopts a tetrahedron {CoN2O2} coordination geometry and complex 2 possesses a distorted trigonal bipyramid {CoN2O3} coordination geometry. Topology analysis results show that complex 1 and 2 possess a uninodal 4-connected 2D (two-dimensional) sql topology framework with the Schlafli symbol (44·62). Furthermore, the photocatalytic degradation property and mechanism of 1 and 2 for methylene blue (MB) were investigated. The results show that the band gap (Eg) of 1–2 is 2.69 eV and 2.60 eV, and the equipotential point (pHpzc) of 1–2 is 4.47 and 4.40. Complex 1–2 show excellent photocatalytic degradation for MB. ·OH is the main active substance causing MB degradation.

Syntheses, structure and luminescent sensing for Cr(VI)/Fe(III) of a Zn(II) coordination polymer

A Zn(II) coordination polymer formulated as {[Zn(L)(bimb)]·2H2O)}n from 4-mercaptobenzoic acid (HL) and 1,4-bis(imidazol-1-ylmethyl)benzene) (bimb), was successfully constructed under the condition of solvothermal and characterized by X-ray single-crystal diffraction, elemental analysis, IR spectra and thermogravimetric (TG) analysis. X-ray single-crystal diffraction analysis exhibits that the complex possesses a uninodal 4-connected 2D (two-dimensional) sql topology framework with the Schläfli symbol (44·62). Luminescence studies demonstrate that complex 1 has high selectivity and sensitivity for pollutant Cr(VI) (CrO42−/Cr2O72−) anions and Fe(III) cations.

Co(II)-based 2D framework with sql topology: Adsorption of permanganate ions in water and energy storage performances

Xylene-functionalized N-donor ligand p-BIMB (p = para position, BIMB = bis- (imidazole-1-ylmethyl)benzene) and rigid carboxylate linker trans-H2CHDA (CHDA = 1,4-cyclohexane(dicarboxylic)acid) were treated with Co(NO3)2 under solvothermal conditions to afford a new two-dimensional (2D) coordination polymer [Co(trans-H2CHDA)2(p-BIMB)2·2H2O]n (1). Complex 1 possesses a sql network. With the porosity formed by the 2D framework, the Co(II) complex 1 demonstrates an excellent specific capacitance of 563 F g−1 at a current density of 1 A g−1, and also good retention of capacitance (≈64% after 4000 cycles at 5 A g−1). Which make complex 1 a good candidate for electrode material in a supercapacitor application. Meanwhile, this Co(II) compound exhibits good adsorption ability for the permanganate anion.

New organic‐pillared zincophosphate and interpenetrating‐layered zinc coordination polymer: Crystal growth on tarbuttite‐like sheets with surface‐active carboxylic acid groups

AbstractFor the first time, crystal growth of two novel distinct structures is observed to emerge from parent tarbuttite‐like zincophosphate sheets, which feature uncoordinated carboxylic acid (─COOH) groups protruding on the surface. A prior study revealed that the ─COOH groups could be modified through mechanochemical reaction to alter the wettability of bulk solid. In this study, the modification of ─COOH groups via amidation in solutions was conducted to tune the wettability to more hydrophobic. A further study in the reactivity of the zincophosphate toward various organic amines resulted in crystal growth of two novel compounds, thereby, a 2D coordination polymer with parallel interpenetrating square lattice (sql) topology and a 3D framework of organopillared zincophosphate were discovered. Intriguing structure transformation involved disassembling and assembling of not only commonly seen molecular units but also zincophosphate polyhedra and clusters: in the former case from rare 5‐coordinate zinc to 4‐coordinate zinc, and in the latter case from original positively charged tarbuttite‐like ZnPO sheets to amine‐pillared neutral sheets composed of unique edge‐sharing Zn2N2O4(H2O)2 dimers.

Tailoring Structural Diversity in Dimethyltin Carboxylates by the pH-Controlled Hydrothermal Approach.

The study presents a rational synthesis of new dimethyltin carboxylates, Me2Sn(H2btec) (1), Me2Sn(btec)0.5(2), [Me2Sn(H2O)2(btec)0.5]·H2O (3), and [{Me2SnOSn(OH)Me2}(Me2SnOH)(btec)0.5]·H2O (4), derived from tetratopic 1,2,4,5-benzenetetracarboxylic acid (H4btec). The method relies upon hydrothermal reaction (130 °C, 72 h) of dimethyltin dichloride and H4btec under optimized pH (2 < pH < 8) conditions that allow control over dimethyltin speciation in aqueous medium as well as degree of deprotonation of the tetrafuntional carboxylic acid. The formation of a three-dimensional assembly in 1 is assisted by the bridging bidentate (μ2) mode of the carboxylate and O-H···O hydrogen bonds involving -COOH groups. The structure represents a unique example of the diorganotin framework derived from a partially deprotonated polyfuntional carboxylic acid. The structure of 2 adopts a three-dimensional motif wherein each pair of μ2-carboxylate groups (designated by C1 and C4) of the tetraanionic ligand form different spatial arrangements. For 3, the formation of one-dimensional motif with eight-coordinated tin atoms is assisted by the anisobidentate character of the carboxylate groups. The structure of 4 includes linear chains comprised of [Me2Sn(μ2-OH)]2 and the carboxylate ligand which extend to a layered motif with symmetrically substituted ladder-like distannoxanes acting as linkers. The underlying nets of 1, 2, and 4 exhibit sqc11, scu(sqc170), and sql topologies, respectively. Notably, these assemblies are extremely robust and show no sign of degradation upon exposure to neutral as well as weakly acidic/basic aqueous medium for 7 days.

Syntheses, structural diversity and photo-degradation and dye adsorption properties of novel Ni(II)/Co(II) coordination polymers modulated by 4-(4-carboxylphenylmethylthio)benzoic acid ligand

Two new coordination polymers (CPs) based on transition metals, namely [Ni2(4,4′-cpmb)2(4,4′-bbibp)2(H2O)4]n (1) and [Co(4,4′-Hcpmb)(1,3-bib)]n (2) (flexible 4,4′-H2cpmb = 4-(4-carboxylphenylmethylthio)benzoic acid, rigid 4,4′-bbibp = 4,4′-bis(benzoimidazo-1-ly)biphenyl and 1,3-Hbib = 1,3-bis(1-imidazo-1-ly)benzoic acid), have been designed and successfully synthesized under solvothermal conditions, which have been characterized by elemental analysis, infrared spectra, thermogravimetric (TG) analysis, powder X-ray diffraction (PXRD) and single-crystal X-ray diffraction. Single-crystal X-ray diffraction analysis reveals that 1 features a 3D supermolecular structure in ABAB mode by H bonds (O⋯H⋯O) with a 2-fold interpenetrating sql topology framework and 2 displays a 3D supermolecular framework by H bonds (O⋯H⋯O) with a rarely fes topology. Moreover, the photo-degradation and dye adsorption properties of CPs 1–2 have been investigated. Importantly, 2 shows good photo-degradation and dye adsorption properties.

Four Co(II) - MOFs based on 3,3′-azodibenzoic acid ligand: Syntheses, crystal structure, photodegradation properties

Four novel Co(II)-MOFs based on the 3,3′-azodibenzoic acid (H2L), namely [CoL (bimb)0.5]n (1), {[CoL (bimmb)]·DMF}n (2), [CoL (bimmb)0.5]n (3), and [CoL (bbibp)]n (4) (bimb = 1,4-bisimidazole, bimmb = 4-bis(imidazole-1-ylmethyl)benzene, bbibp = 4,4′-bis(benzoimidazo-1-yl)biphenyl and DMF = N, N′-dimethylformamide) have been synthesized under solvothermal conditions and characterized by elemental analysis, IR spectra, powder X-ray diffraction (PXRD), thermogravimetric (TG) analysis and single crystal X-ray diffraction. Single crystal X-ray diffraction analysis shows that complex 1 and complex 3 possesses the same structure as uninodal 6-connected 3D (three-dimensional) pcu topology framework with the point symbol (412.63), whereas complex 2 possesses an uninodal 3-connected hcb topology framework with the point symbol (63) and complex 4 displays a 4-connected sql topology framework with the point symbol of (44.62). In addition, the photocatalytic degradation properties of the four complexes have been investigated. Significantly, complex 4 is the best photocatalyst for the degradation of three organic dyes (MV/MB/RhB). Complex 2 is the good photocatalyst for the degradation of two organic dyes (RhB/MB). Complex 3 is the good photocatalyst for the degradation of two organic dyes (MV/MB) and complex 1 is the good photocatalyst for the degradation of only one organic dyes (MV).

Construction of mixed carboxylate and pyrogallate building units for luminescent metal–organic frameworks

A metal-organic framework, Ce-FDM-50, was constructed by employing gallic acid featuring both carboxylate and pyrogallate as the coordinating sites and Ce(III). The co-assembly of the carboxylates and pyrogallates with two metal ions have achieved a new type of paddle wheel secondary building unit. These building units were further joined by organic struts to obtain frameworks in sql topology. This synthetic approach could be expanded to five different lanthanide metals (Nd, Eu, Gd, Tb, Yb) for the construction of a series of isoreticular MOFs based on FDM-50, and even MTV-MOFs in which mixed lanthanide metals with specific ratios were distributed. In addition, featuring the lanthanide metals as the inorganic nodes in the network, Tb-FDM-50 showed distinct luminescence properties that could be furtherly tuned for variable applications.

Favoring Framework Formation through Structure-Directing Effects in Uranyl Ion Complexes with 1,2,3,4-(Cyclo)butanetetracarboxylate Ligands

Six uranyl ion complexes with 1,2,3,4-cyclobutanetetracarboxylic acid (H4CBTC) and one with 1,2,3,4-butanetetracarboxylic acid (H4BTC) have been obtained under solvo-hydrothermal conditions in the presence of diverse, organic or metallic counterions. The different conformations found for the cyclic ligand (cis,trans,cis or trans,trans,trans in most cases, with one instance of cis,trans,trans), the diverse coordination modes adopted, and the presence of additional metal cations in some cases result in variations in dimensionality and topology of the complexes formed. Two complexes involve protonated azamacrocycles as counterions, [R,S-Me6cyclamH2][UO2(CBTC)] (1) and [cyclamH4][UO2(CBTC)]2 (2), where cyclam = 1,4,8,11-tetra-azacyclotetradecane and R,S-Me6cyclam = 7(R),14(S)-5,5,7,12,12,14-hexamethylcyclam, which crystallize as a one-dimensional (1D) ribbon-like coordination polymer and a two-dimensional (2D) network with sql topology, respectively, the counterions providing additional hydrogen bonding conne...

Two difunctional Co(II) coordination polymers for natural sunlight photocatalysis of methylene blue and selective fluorescence sensing of Cr(VI) ion in water media

Two new difunctional Co(II) coordination polymers (CPs), namely, [Co(TBTA)(L)1.5]n (1) and {[Co(NPHT)(L)]·H2O}n (2) were hydrothermally synthesized from 4,4′-bis(imidazole-1-yl)-biphenyl and different aromatic carboxylic acid ligands (H2TBTA = tetrabromoterephthalic acid, and H2NPHT = 3-nitrophthalic acid). Two CPs feature 2D (3,6)-connected hcb, and (4,4)-connected sql topologies for 1, and 2, respectively. 1 further extends into a three dimensional supramolecular architecture through π···π stacking interactions. Both of CPs exhibit high photocatalytic activities for degradation of methylene blue (MB) with remarkable efficiencies (85.83% for 1, and 93.76% for 2) under natural sunlight irradiation. 1 can sensitively and selectively detect Cr(VI) anions in water media with the Stern-Volmer quenching constant (Ksv) of 4.79 × 104 M−1 for Cr2O72− (pH = 3) or 2.36 × 104 M−1 for CrO42− (pH = 12). The linear detection ranges are 0–350 μM, and 0–200 μM for Cr2O72−, and for CrO42−, severally.

Synthesis of two different Ni(II) coordination polymers by introduction of carboxylic acid ligands: Crystal structure and photocatalytic properties

Two different novel coordination polymers were synthesized under hydrothermal conditions, namely {[Ni(bibp)3(H2O)2]·2NO3·0.5H2O}n (1), [NiL(bibp)]n (2) (H2L = 3,3′-azodibenzoic acid, bibp = 4,4′-bis(imidazolyl)biphenyl). Complex 2 is based on the introduction of carboxylic acid ligands on complex 1. These two polymers were characterized by single crystal X-ray diffraction, IR spectra, elemental analysis, powder X-ray diffraction (PXRD), and thermogravimetric (TG) analysis. Single crystal X-ray diffraction analysis showed that complex 1 formed a 3D structure by weak force. Complex 2 possesses a uninodal 4-connected 3D (three-dimensional) sql topology framework with the point symbol (44·62). In addition, the photocatalytic degradation properties of the two complexes are investigated. Significantly, complex 1 is a good photocatalyst for the degradation of organic dyes (RhB/MO), complex 2 is a good photocatalyst for the degradation of organic dyes (MB). And the possible photodegradation mechanism was proposed and explored.

Cu(II) MOFs Based on Bipyridyls: Topology, Magnetism, and Exploring Sensing Ability toward Multiple Nitroaromatic Explosives.

In this work, a series of three copper(II) metal-organic frameworks (MOFs), [Cu(4,4′-DP)Cl]n (1), [Cu(4,4′-DP)0.5Cl]n (2), and [Cu(4,4′-TMDP)Cl]n (3) (4,4′-DP = 4,4′-dipyridyl, 4,4′-TMDP = 4,4′-trimethylenedipyridyl), is designed and synthesized under solvothermal conditions. Crystallographic investigations reveal that 1 and 2 have tetrahedral and 3 has octahedral environment around the Cu(II) ion. By varying the solvent conditions and ligand derivatives, the topology can be interestingly tuned. TOPOS Pro provides topological conclusions that 1 is stabilized by unusual 2D + 2D → 3D polycatenation of layers lying in (110) and (11̅0) planes with dihedral angle of 90° showing altogether fes, hcb, and sql topologies. On the other hand, 2 exhibits a bey (3,4-c net) topology and 3 shows 4-fold interpenetration with the dia topology. The dc measurements for 1–3 performed on polycrystalline samples in a 0.1 T field confirm strong ferromagnetic behaviors for 1 and 2 and moderate antiferromagnetic behavior for 3. To examine the sensing properties of the three MOFs, various hazardous nitroaromatic compounds (NACs) were used as analytes. While 1 is a potent fluorescence sensor for highly sensitive detection of multiple NACs, 2 selectively detects meta-dinitrobenzene (m-DNB) with KSV = 5.73 × 105 M–1 and a remarkably lower limit of detection (LOD) value of 1.23 × 10–7 M. 3 does not show sensing ability toward any NAC probably due to the coordination environment being different from those in 1 and 2. The work demonstrates fine-tuning of the topology and in turn magnetic and sensing properties by changing the reaction conditions.