scholarly journals pH Dependent Sensitization of Europium in a Hydrogen Bonded Three-Dimensional Metal-Organic Compounds with (4966)2(4462)3 Topology: Luminescence Titration and Time-resolved Studies

2021 ◽  
Author(s):  
Sudip Kumar Mondal ◽  
Partha Mahata ◽  
Pooja Daga ◽  
Sayani Hui ◽  
Sourav Sarkar ◽  
...  
Keyword(s):  
Rare Earth ◽  
Organic Compound ◽  
Dicarboxylic Acid ◽  
Organic Compounds ◽  
Three Dimensional ◽  
Time Resolved ◽  
Hydrothermal Technique ◽  
Pyridine Dicarboxylic Acid ◽  
Metal Organic ◽  
Ph Dependent

A rare-earth-based metal-organic compound (MOC), [Y2(pydc)6(H2pip)3]·20H2O (pydc = 2,6-pyridine dicarboxylate, H2pip = diprotonated piperazine), (1), was prepared by hydrothermal technique using 2,6-pyridine dicarboxylic acid, piperazine, and Y(III) ions. Applying the...

scholarly journals Photochemistry of framework-supported M(diimine)(CO) 3 X complexes in three-dimensional lithium carboxylate metal–organic frameworks: monitoring the effect of framework cations

2017 ◽  
Vol 375 (2084) ◽  
pp. 20160033 ◽  
Author(s):  
Thomas J. Reade ◽  
Thomas S. Murphy ◽  
James A. Calladine ◽  
Raphael Horvath ◽  
Ian P. Clark ◽  
...  
Keyword(s):  
Dicarboxylic Acid ◽  
Density Functional ◽  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Density Functional Theory Calculations ◽  
Time Resolved ◽  
Infrared Measurements ◽  
Metal Organic ◽  
State Behaviour ◽  
Photochemical Behaviour

The structures and photochemical behaviour of two new metal–organic frameworks (MOFs) are reported. Reaction of Re(2,2′-bipy-5,5′-dicarboxylic acid)(CO) 3 Cl or Mn(2,2′-bipy-5,5′-dicarboxylic acid)(CO) 3 Br with LiCl or LiBr, respectively, produces single crystals of {Li 2 (DMF) 2 [(2,2′-bipy-5,5′-dicarboxylate)Re(CO) 3 Cl]} n ( ReLi ) or {Li 2 (DMF) 2 [(2,2′-bipy-5,5′-dicarboxylate)Mn(CO) 3 Br]} n ( MnLi ). The structures formed by the two MOFs comprise one-dimensional chains of carboxylate-bridged Li(I) cations that are cross-linked by units of Re(2,2′-bipy-5,5′-dicarboxylate)(CO) 3 Cl ( ReLi ) or Mn(2,2′-bipy-5,5′- dicarboxylate)(CO) 3 Br ( MnLi ). The photophysical and photochemical behaviour of both ReLi and MnLi are probed. The rhenium-containing MOF, ReLi , exhibits luminescence and the excited state behaviour, as established by time-resolved infrared measurements, is closer in behaviour to that of unsubstituted [Re(bipy)(CO) 3 Cl] rather than a related MOF where the Li(I) cations are replaced by Mn(II) cations. These observations are further supported by density functional theory calculations. Upon excitation MnLi forms a dicarbonyl species which rapidly recombines with the dissociated CO, in a fashion consistent with the majority of the photoejected CO not escaping the MOF channels. This article is part of the themed issue ‘Coordination polymers and metal–organic frameworks: materials by design’.

A porous anionic zinc(II) metal-organic framework for gas adsorption, selective uptake of dyes and sensing of Fe3+ by Tb3+ ion encapsulation

CrystEngComm ◽  
2021 ◽  
Author(s):  
Yu-Jie Liang ◽  
Jun Yao ◽  
Ming Deng ◽  
Yan-E Liu ◽  
Quan-Qing Xu ◽  
...  
Keyword(s):  
Dicarboxylic Acid ◽  
Gas Adsorption ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Selective Uptake ◽  
Mixed Ligands ◽  
Metal Organic ◽  
Dicarboxylate Ligand ◽  
Organic Framework

A three-dimensional (3D) metal-organic framework [(CH3)2NH2][Zn2(DMTDC)2(3-mtz)]•4DMF•3H2O (Zn-MOF) has been solvothermally synthesized by using mixed ligands of 3-methyl-1,2,4-triazole (3-Hmtz) and a thiophene-functionalized dicarboxylate ligand, 3,4-dimethylthieno[2,3-b]thiophene-2,5-dicarboxylic acid (H2DMTDC). Zn-MOF exhibits a uninodal...

A New Three‐dimensional Metal‐organic Framework based on Dinuclear Rare Earth Cluster and Olsalazine

2019 ◽  
Vol 645 (21) ◽  
pp. 1267-1270 ◽  
Author(s):  
Xin Zhang ◽  
Fangyuan Zhong ◽  
Jun Liu ◽  
Hui Xu ◽  
Junkuo Gao ◽  
...  
Keyword(s):  
Rare Earth ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Metal Organic ◽  
Organic Framework

Reduction of some organic compounds by electrochemically generated titanium(III)

1978 ◽  
Vol 56 (17) ◽  
pp. 2269-2272 ◽  
Author(s):  
Olympia Christofis ◽  
Jacob J. Habeeb ◽  
Richard S. Steevensz ◽  
Dennis G. Tuck
Keyword(s):  
Organic Compound ◽  
Dicarboxylic Acid ◽  
Electrochemical Oxidation ◽  
Functional Groups ◽  
Organic Compounds ◽  
Aqueous Electrolyte ◽  
Titanium Metal ◽  
Organic Functional Groups ◽  
Nitro Aromatics

The electrochemical oxidation of titanium metal in the presence of an essentially non-aqueous electrolyte phase yields titanium(III) species in solution. It has been shown that this method of generating TiX3 (X = balancing anion) forms the basis of a convenient way of reducing insitu certain organic functional groups (sulfoxide, oxime, haloketone, vinyl dicarboxylic acid, and nitro aromatics). The stoichiometry of the reaction has been established in each case, and corresponds to the oxidation of TiX3 and the formation of the appropriate organic compound. The yields are comparable to those reported in experiments using aqueous titanous chloride.

A twofold interpenetrating three-dimensional heterometallic metal–organic framework with pcu topology based on 2-methylbiphenyl-4,4′-dicarboxylic acid

2017 ◽  
Vol 73 (6) ◽  
pp. 470-475 ◽  
Author(s):  
Pei-Ying Guo ◽  
De-Yun Ma ◽  
Hai-Fu Guo
Keyword(s):  
Dicarboxylic Acid ◽  
Title Compound ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Tetrahedral Geometry ◽  
Carboxylate Groups ◽  
Metal Organic ◽  
Dianionic Ligands ◽  
Bright Blue Fluorescence ◽  
Bright Blue

The 2-methylbiphenyl-4,4′-dicarboxylate (mbpdc2−) ligand has versatile coordination modes and can be used to construct multinuclear structures. Despite this, reports of the synthesis of coordination complexes involving this ligand are scarce. The title compound, poly[[triaquadi-μ3-hydroxido-hexakis(μ4-2-methylbiphenyl-4,4′-dicarboxylato)calcium(II)hexazinc(II)] monohydrate], {[CaZn6(C15H10O4)6(OH)2(H2O)3]·H2O} n , has been prepared by the hydrothermal assembly of Zn(NO3)2·6H2O, CaCl2 and 2-methylbiphenyl-4,4′-dicarboxylic acid. Two ZnII atoms adopt a four-coordinated distorted tetrahedral geometry by bonding to three O atoms from three different 2-methylbiphenyl-4,4′-dicarboxylate (mbpdc2−) dianionic ligands and one bridging hydroxide O atom. For the remaining ZnII atom, a five-coordinate environment is completed half the time by one carboxylate O atom, and then the same carboxylate O atom and an aqua O atom are present the other half of the time, giving a six-coordinate environment. The CaII atom is coordinated by six O atoms to give an octahedral coordination geometry. The supramolecular secondary building unit (SBU) is a hamburger-like heptanuclear unit (Zn6CaO30) and these units are interconnected through mbpdc2− carboxylate groups to generate a three-dimensional framework with the pcu topology. The single net leaves voids that are filled by mutual interpenetration of an independent equivalent framework in a twofold interpenetrating architecture. The title compound shows thermal stability up to 673 K. The excitation and luminescence data showed the emission of a bright-blue fluorescence.

Dramatic luminescence signal from a Co(ii)-based metal–organic compound due to the construction of charge-transfer bands with Al3+ and Fe3+ ions in water: steady-state and time-resolved spectroscopic studies

2020 ◽  
Vol 44 (11) ◽  
pp. 4376-4385 ◽  
Author(s):  
Pooja Daga ◽  
Prakash Majee ◽  
Debal Kanti Singha ◽  
Priyanka Manna ◽  
Sayani Hui ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Steady State ◽  
Organic Compound ◽  
Spectroscopic Studies ◽  
Charge Transfer Complexes ◽  
Time Resolved ◽  
Luminescence Signal ◽  
Turn On ◽  
Metal Organic

A Co(ii)-based metal–organic compound exhibits luminescence turn-on by Al3+ and quenching by Fe3+ due to the formation of charge-transfer complexes/adducts.

Fabrication of amino functionalized benzene-1,4-dicarboxylic acid facilitated cerium based metal organic frameworks for efficient removal of fluoride from water environment

2021 ◽  
Author(s):  
Antonysamy Jeyaseelan ◽  
Mu. Naushad ◽  
Tansir Ahamad ◽  
Natrayasamy Viswanathan
Keyword(s):  
Dicarboxylic Acid ◽  
Metal Organic Frameworks ◽  
Water Environment ◽  
Efficient Removal ◽  
Hydrothermal Technique ◽  
Metal Organic ◽  
Defluoridation Of Water ◽  
Highly Porous

In this present work, we have developed the highly porous nature of cerium (Ce) based metal organic frameworks (MOFs), namely Ce@ABDC and Ce@BDC MOFs, using a hydrothermal technique for the defluoridation of water.

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