Tuning structures and emissive properties in a series of Zn(<scp>ii</scp>) and Cd(<scp>ii</scp>) coordination polymers containing dicarboxylic acids and nicotinamide pillars

Chisca, Diana; Croitor, Lilia; Petuhov, Oleg; Куликова, О. В.; Volodina, G. F.; Coropceanu, Eduard B.; Masunov, Artëm E.; Fonarı, Marina S.

doi:10.1039/c7ce01988b

Cited by 24 publications

(8 citation statements)

References 96 publications

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“…Intensification of this peak leads to shape changes in the PL spectrum and the most obvious is especially for CPs 2 and 3 . These results show that obtained materials have sensitivity to the removal of guest molecules and can be recommended as sensors, thus extending the Zn(II)/Cd(II) family [ 39 , 40 , 41 , 42 ] of CPs with impressive sorption-luminescent properties.…”

Section: Resultsmentioning

confidence: 72%

Crystal Engineering of Schiff Base Zn(II) and Cd(II) Homo- and Zn(II)M(II) (M = Mn or Cd) Heterometallic Coordination Polymers and Their Ability to Accommodate Solvent Guest Molecules

et al. 2021

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Based on solvothermal synthesis, self-assembly of the heptadentate 2,6-diacetylpyridine bis(nicotinoylhydrazone) Schiff base ligand (H2L) and Zn(II) and/or Cd(II) salts has led to the formation of three homometallic [CdL]n (1), {[CdL]∙0.5dmf∙H2O}n (2) and {[ZnL]∙0.5dmf∙1.5H2O}n (3), as well as two heterometallic {[Zn0.75Cd1.25L2]∙dmf∙0.5H2O}n (4) and {[MnZnL2]∙dmf∙3H2O}n coordination polymers. Compound 1 represents a 1D chain, whereas 2–5 are isostructural and isomorphous two-dimensional structures. The entire series was characterized by IR spectroscopy, thermogravimetric analysis, single-crystal X-ray diffraction and emission measurements. 2D coordination polymers accommodate water and dmf molecules in their cage-shaped interlayer spaces, which are released when the samples are heated. Thus, three solvated crystals were degassed at two temperatures and their photoluminescent and adsorption–desorption properties were recorded in order to validate this assumption. Solvent-free samples reveal an increase in volume pore, adsorption specific surface area and photoluminescence with regard to synthesized crystals.

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Section: Resultsmentioning

confidence: 72%

Crystal Engineering of Schiff Base Zn(II) and Cd(II) Homo- and Zn(II)M(II) (M = Mn or Cd) Heterometallic Coordination Polymers and Their Ability to Accommodate Solvent Guest Molecules

et al. 2021

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“…Moreover, the acidic and basic sites in PNU-21 and PNU-22 were analyzed by NH 3 and CO 2 TPD analyses. The acid and base strength of these catalysts were described by three regions, namely, weak, medium, and strong acidic/basic sites, over the temperature ranges of 200–310, 310–500, and 500–1000 °C . As depicted in Figure S13 and Table , the weak to strong acidic and basic sites in both catalysts were found in the range of 180–600 °C.…”

Section: Resultsmentioning

confidence: 95%

“…The acid and base strength of these catalysts were described by three regions, namely, weak, medium, and strong acidic/basic sites, over the temperature ranges of 200−310, 310−500, and 500−1000 °C. 95 As depicted in Figure S13 and Table 1, the weak to strong acidic and basic sites in both catalysts were found in the range of 180−600 °C. Different desorption peaks were observed for the binding capacity of NH 3 for each catalyst.…”

Section: ■ Experimental Sectionmentioning

confidence: 89%

Adenine-Based Zn(II)/Cd(II) Metal–Organic Frameworks as Efficient Heterogeneous Catalysts for Facile CO₂ Fixation into Cyclic Carbonates: A DFT-Supported Study of the Reaction Mechanism

Rachuri¹,

Kurisingal²,

Chitumalla³

et al. 2019

Inorg. Chem.

115

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We synthesized two new adenine-based Zn-(II)/Cd(II) metal−organic frameworks (MOFs), namely, [Zn 2 (H 2 O)(stdb) 2 (5H-Ade)(9H-Ade) 2 ] n (PNU-21) and [Cd 2 (Hstdb)(stdb)(8H-Ade)(Ade)] n (PNU-22), containing auxiliary dicarboxylate ligand (stdb = 4,4′-stilbenedicarboxylate). Both MOFs were characterized by multiple analytical techniques such as single-crystal X-ray diffraction (SXRD), powder X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, scanning electron microscopy, as well as temperature program desorption and Brunauer−Emmett−Teller measurements. Both MOFs were structurally robust and possessed unsaturated Lewis acidic metal centers [Zn(II) and Cd(II)] and free basic N atoms of adenine molecules. They were used as heterogeneous catalysts for the fixation of CO 2 into five-membered cyclic carbonates. Significant conversion of epichlorohydrin (ECH) was attained at a low CO 2 pressure (0.4 MPa) and moderate catalyst (0.6 mol %)/cocatalyst (0.3 mol %) amounts, with over 99% selectivity toward the ECH carbonate. They showed comparable or even higher catalytic activity than other previously reported MOFs. Because of high thermal stability and robust architecture of PNU-21/PNU-22, both catalysts could be reused with simple separation up to five successive cycles without any considerable loss of their catalytic activity. Densely populated acidic and basic sites in both Zn(II)/Cd(II) MOFs facilitated the conversion of ECH to ECH carbonate in high yields. The reaction mechanism of the cycloaddition reaction between ECH and CO 2 is described by possible intermediates, transition states, and pathways, from the density functional theory calculation in correlation with the SXRD structure of PNU-21.

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“…It is noteworthy that the intensity of the luminescence spectrum of compound 2 has been found to be largely enhanced in contrast to those of the compounds 1 and 3 . This phenomenon can suggest that the L 3− ligand can restrain their configurations by coordinating to zinc centers in a bridging coordination mode, and consequently, the rigidification of organic L 3− ligand as linker in a CP with d 10 metal ion will reduce the degree of freedom (compared to that of the free ligand), furthermore, reduce non‐radiative relaxation caused by free rotation and vibration, therefore, lead to stronger emission …”

Section: Resultsmentioning

confidence: 99%

Syntheses, Structures and Properties of Three Coordination Polymers with 3D Network, 2D Lattice, 1D Ladder Structures

et al. 2020

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Three coordination polymers (CPs), [Ni1.5(L)(bipy)2(H2O)3]n(1), [Zn(L)(Hbipy) (H2O)]n⋅2n(H2O) (2) and [Cu(bipy)2(H2O)2]n⋅2n(H2L)⋅ 3nH2O (3) (NaH2L=5‐sulfoisophthalic monosodium salt, bipy=4,4′‐bipyridine) have been synthesized by solvothermal methods. They were characterized by X‐ray single crystal diffraction, elemental and thermogravimetric analyses. Introduction of the auxiliary N‐donor ligand (bipy) can lead to three Ni(II), Zn(II) and Cu(II) CPs with three‐dimensional (3D) 4‐connected network of the point symbol of (75⋅9), one‐dimensional (1D) ladder and two‐dimensional (2D) lattice frameworks, respectively. Compound 1 is racemic, whose topological structure can be divided into left‐handed and right‐handed helices. The fluorescence emission peaks of compounds 1–3 are located at 416 nm, 412 nm and 455 nm, respectively, which may be attributed to the ligand to metal charge transfers. Variable‐temperature magnetic susceptibility measurements can reveal that there are ferromagnetic and antiferromagnetic exchange interactions between the neighboring spins in compounds 1 and 3, respectively, and compound 2 is a diamagnetism system. Compound 1 shows the second‐harmonic generation (SHG) response that is 4 times those of potassium dihydrogen phosphate (KDP).

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Tuning structures and emissive properties in a series of Zn(ii) and Cd(ii) coordination polymers containing dicarboxylic acids and nicotinamide pillars

Abstract: The influence of the metal, ligand, and solvent on structures and emission properties was monitored.

Cited by 24 publications

References 96 publications

Crystal Engineering of Schiff Base Zn(II) and Cd(II) Homo- and Zn(II)M(II) (M = Mn or Cd) Heterometallic Coordination Polymers and Their Ability to Accommodate Solvent Guest Molecules

Crystal Engineering of Schiff Base Zn(II) and Cd(II) Homo- and Zn(II)M(II) (M = Mn or Cd) Heterometallic Coordination Polymers and Their Ability to Accommodate Solvent Guest Molecules

Adenine-Based Zn(II)/Cd(II) Metal–Organic Frameworks as Efficient Heterogeneous Catalysts for Facile CO₂ Fixation into Cyclic Carbonates: A DFT-Supported Study of the Reaction Mechanism

Syntheses, Structures and Properties of Three Coordination Polymers with 3D Network, 2D Lattice, 1D Ladder Structures

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Tuning structures and emissive properties in a series of Zn(ii) and Cd(ii) coordination polymers containing dicarboxylic acids and nicotinamide pillars

Abstract: The influence of the metal, ligand, and solvent on structures and emission properties was monitored.

Cited by 24 publications

References 96 publications

Crystal Engineering of Schiff Base Zn(II) and Cd(II) Homo- and Zn(II)M(II) (M = Mn or Cd) Heterometallic Coordination Polymers and Their Ability to Accommodate Solvent Guest Molecules

Crystal Engineering of Schiff Base Zn(II) and Cd(II) Homo- and Zn(II)M(II) (M = Mn or Cd) Heterometallic Coordination Polymers and Their Ability to Accommodate Solvent Guest Molecules

Adenine-Based Zn(II)/Cd(II) Metal–Organic Frameworks as Efficient Heterogeneous Catalysts for Facile CO2 Fixation into Cyclic Carbonates: A DFT-Supported Study of the Reaction Mechanism

Syntheses, Structures and Properties of Three Coordination Polymers with 3D Network, 2D Lattice, 1D Ladder Structures

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Product

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Adenine-Based Zn(II)/Cd(II) Metal–Organic Frameworks as Efficient Heterogeneous Catalysts for Facile CO₂ Fixation into Cyclic Carbonates: A DFT-Supported Study of the Reaction Mechanism