Bent tritopic carboxylates for coordination networks: clues to the origin of self-penetration

Chen, Jin Xiang; Zhao, Hai Qing; Li, Huan Huan; Huang, Shengbing; Ding, Ning; Chen, Wenhua; Young, David J.; Zhang, Wen Hua; Hor, T. S. Andy

doi:10.1039/c4ce00830h

Cited by 22 publications

(12 citation statements)

References 52 publications

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“…In our case, we found that the TGA of the activated sample exhibits similar scaffold decomposition temperature as that of the as-synthesized ( Figure 1 ), but its PXRD pattern becomes amorphous ( Figure S2 ), suggesting some collapse of the crystal under the activation condition and may ultimately lead to the reduction of the pore size to exclude the N 2 uptake. MOF 1 exhibited a type I CO 2 adsorption profile with steep uptake in the low-pressure region, typical of a microporous material with open channels in the degassed phase [ 45 , 81 , 82 , 83 ]. The CO 2 adsorption isotherm for MOF 1 exhibits a negligible hysteresis upon desorption, an indication of the scaffold rigidity.…”

Section: Resultsmentioning

confidence: 99%

Co2 and Co3 Mixed Cluster Secondary Building Unit Approach toward a Three-Dimensional Metal-Organic Framework with Permanent Porosity

2018

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Large and permanent porosity is the primary concern when designing metal-organic frameworks (MOFs) for specific applications, such as catalysis and drug delivery. In this article, we report a MOF Co11(BTB)6(NO3)4(DEF)2(H2O)14 (1, H3BTB = 1,3,5-tris(4-carboxyphenyl)benzene; DEF = N,N-diethylformamide) via a mixed cluster secondary building unit (SBU) approach. MOF 1 is sustained by a rare combination of a linear trinuclear Co3 and two types of dinuclear Co2 SBUs in a 1:2:2 ratio. These SBUs are bridged by BTB ligands to yield a three-dimensional (3D) non-interpenetrated MOF as a result of the less effective packing due to the geometrically contrasting SBUs. The guest-free framework of 1 has an estimated density of 0.469 g cm−3 and exhibits a potential solvent accessible void of 69.6% of the total cell volume. The activated sample of 1 exhibits an estimated Brunauer-Emmett-Teller (BET) surface area of 155 m2 g−1 and is capable of CO2 uptake of 58.61 cm3 g−1 (2.63 mmol g−1, 11.6 wt % at standard temperature and pressure) in a reversible manner at 195 K, showcasing its permanent porosity.

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Section: Resultsmentioning

confidence: 99%

Co2 and Co3 Mixed Cluster Secondary Building Unit Approach toward a Three-Dimensional Metal-Organic Framework with Permanent Porosity

2018

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“…The tetra-coordination of two terminal copper atoms Cu(1) and Cu( 3) is completed by one µ-carboxylate bridge atom, one monodentate carboxylate group, one µ-hydroxo bridge and one H 2 O molecule. In complex 1, the average Cu-O (water) bond length of 1.9466 (10) Å is comparable to that of Cu-O (carboxylate) (1.9107(17) Å), but shorter than that of the Cu-O (water) bond in complex [Cu(II)L(H 2 O)]I 2 (2.430(0) Å, H 4 L = [5,11,17,23-tetrakis (trimethylammonium)-25,26,27,28-tetrahydroxycalix[4]arene]), 20 indicating that the water molecules interact tightly with the Cu(II) centers.…”

Section: Resultsmentioning

confidence: 99%

“…H 3 CmdcpBr was synthesized according to the method we reported. 10 Buffer solutions were prepared in triply distilled deionized water.…”

Section: Methodsmentioning

confidence: 99%

Five water-soluble zwitterionic copper(ii)-carboxylate polymers: role of dipyridyl coligands in enhancing the DNA-binding, cleaving and anticancer activities

et al. 2015

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Five water-soluble zwitterionic copper-carboxylate polymers were prepared from the reaction of N-carboxymethyl-(3,5-dicarboxyl)pyridinium bromide (H3CmdcpBr) with Cu(NO3)2 in the presence of NaOH by modulating the temperature, solvent and ancillary dipyridyl ligands. These complexes include a 1D ladder-shaped polymer {[Cu3(Cmdcp)2(OH)2(H2O)2]·H2O}n () formed in H2O at room temperature, and a 2D network polymer {[Cu(Cmdcp) (H2O)2]·2H2O}n () isolated in H2O at 135 °C. At 100 °C in H2O/DMF, the same reaction in the presence of an additional 2,2'-bipyridine (bipy) gave a 2D zwitterionic complex {[Cu(Cmdcp)(bipy)]·3H2O}n () together with a 1D double-stranded polymer {[Cu(Cmdcp)(H2O)2]·H2O}n () as a minor product. The replacement of bipy with phenanthroline (phen) afforded a 1D zigzag polymer chain {[Cu(Cmdcp)(phen)(H2O)]2·9H2O}5 (). All these complexes were characterized by IR, elemental analyses and single crystal X-ray crystallography. Agarose gel electrophoresis (GE) and ethidium bromide (EB) displacement experiments indicated that complex exhibited the highest pBR322 DNA cleaving ability with the catalytic efficiency (kmax/KM) of 14.80 h(-1) mM(-1) and the highest binding affinity toward calf-thymus DNA. The MTT assay indicated that complex showed significant inhibitory activity toward the proliferation of several tumor cells. Its IC50 value was at micromolar level and lower than those of cisplatin and complexes , especially toward resistant lung adenocarcinoma cell A549.

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“…We herein report the synthesis of two water-stable manganese and gadolinium MOFs of N -(4-carboxybenzyl)-(3,5-dicarboxyl)pyridinium bromide (H 3 CmdcpBr, Chart ), − namely, {[Mn 2 (Cmdcp) 2 (H 2 O) 2 ]·H 2 O} n ( 1 ) and {[Gd(Cmdcp)(H 2 O) 3 ] (NO 3 )·3H 2 O} n ( 2 ), together with their structures and physical characterization data. Both 1 and 2 demonstrate increased T 1 relaxivities and excellent stability under physiological conditions.…”

Section: Introductionmentioning

confidence: 99%

Zwitterionic Manganese and Gadolinium Metal–Organic Frameworks as Efficient Contrast Agents for in Vivo Magnetic Resonance Imaging

Qin

Sun

Cheng

et al. 2017

ACS Appl. Mater. Interfaces

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Two water-stable three-dimensional Mn- and Gd-based metal-organic frameworks (MOFs), {[Mn(Cmdcp)(HO)]·HO} (1) and {[Gd(Cmdcp)(HO)](NO)·3HO} (2, HCmdcpBr = N-(4-carboxy benzyl)-(3,5-dicarboxyl)pyridinium bromide), have been prepared and analyzed. In vitro magnetic resonance imaging indicated that MOFs 1 and 2 possess relaxivity r values of 17.50 and 13.46 mM·S, respectively, which are superior to that of the control Gd-DTPA (r = 4.87 mM·S, DTPA = diethylene triamine pentaacetate). MOFs 1 and 2 also possessed good biocompatibility and low cytotoxicity against a model cell line. In vivo magnetic resonance images of treated Kunming mice indicated that kidneys showed remarkably positive signal enhancement after 15 min with intravenous administration of MOF 1 and the hyperintensity of both kidneys persisted for about 240 min with no obvious tissue damage. MOF 1 is therefore promising in vivo probes for imaging intravascular diseases and renal dysfunction.

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Bent tritopic carboxylates for coordination networks: clues to the origin of self-penetration

Abstract: We suggest in this paper that the combinative use of bent tritopic carboxylate, linear dipyridyl and adaptable Cu2+ ion leads to a higher probability of self-penetrated polymeric networks.

Cited by 22 publications

References 52 publications

Co2 and Co3 Mixed Cluster Secondary Building Unit Approach toward a Three-Dimensional Metal-Organic Framework with Permanent Porosity

Co2 and Co3 Mixed Cluster Secondary Building Unit Approach toward a Three-Dimensional Metal-Organic Framework with Permanent Porosity

Five water-soluble zwitterionic copper(ii)-carboxylate polymers: role of dipyridyl coligands in enhancing the DNA-binding, cleaving and anticancer activities

Zwitterionic Manganese and Gadolinium Metal–Organic Frameworks as Efficient Contrast Agents for in Vivo Magnetic Resonance Imaging

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