A mercapto functionalized magnetic Zr-MOF by solvent-assisted ligand exchange for Hg2+ removal from water

2016 ◽  
Vol 4 (14) ◽  
pp. 5159-5166 ◽  
Author(s):  
Lijin Huang ◽  
Man He ◽  
Beibei Chen ◽  
Bin Hu
Keyword(s):  
Ligand Exchange ◽  
Mercaptoacetic Acid ◽  
Mercapto Group ◽  
Mild Conditions ◽  
Facile Preparation

A facile preparation of magnetic MOF composites with flexible mercapto group pendants in their pores is realized through solvent-assisted ligand exchange (SALE) under mild conditions in water, and terephthalate in UIO-66 is replaced with mercaptoacetic acid (MAA).

Some aspects of the formation and structural features of low nuclearity heterometallic carboxylates

2020 ◽  
Vol 92 (7) ◽  
pp. 1093-1110 ◽  
Author(s):  
Aleksey A. Sidorov ◽  
Natalia V. Gogoleva ◽  
Evgeniya S. Bazhina ◽  
Stanislav A. Nikolaevskii ◽  
Maksim A. Shmelev ◽  
...  
Keyword(s):  
Ligand Exchange ◽  
Direct Synthesis ◽  
Molecular Complexes ◽  
Structural Features ◽  
Exchange Reactions ◽  
Metal Core ◽  
Mild Conditions ◽  
Metal Organic ◽  
Heterometallic Carboxylates ◽  
Molecular Compounds

AbstractHeterometallic carboxylate complexes are of paramount interest in pure and applied coordination chemistry. Despite that plurality of such type compounds have been published to date, synthetic aspects of their chemistry often remain in the shadow of intriguing physical properties manifesting by these species. Present review summarizes reliable data on direct synthesis of low nuclearity molecular compounds as well as coordination polymers on their base with carboxylate-bridged {M2Mg} (M = Co2+, Ni2+, Cd2+), {M2Li2} (M = Co2+, Ni2+, Zn2+, VO2+), {M2Ln2} and {M2Ln} (M = Cu2+, Zn2+, Co2+) metal cores. Structural features and stabilization factors are considered and principal outcomes are confirmed by quantum-chemical calculations. Particular attention is paid to consideration of ligand-exchange reactions that allow controllable modification of heterometallic metal core under mild conditions giving diverse molecular complexes with modified ligand environment or Metal-Organic Frameworks with permanent porosity.

Facile Preparation of AgIn5S8 Pompon-like Microspheres with High Visible Light Photocatalytic Activity

2011 ◽  
Vol 239-242 ◽  
pp. 3302-3305 ◽  
Author(s):  
Ping Ping Yao ◽  
Dai Long Wei ◽  
Xue Ling Zhao ◽  
Shi Zhao Kang ◽  
Xiang Qing Li ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Mercaptoacetic Acid ◽  
Cubic Phase ◽  
Sulfur Source ◽  
Nano Materials ◽  
Bet Analysis ◽  
Facile Preparation ◽  
Degradation Of Methyl Orange ◽  
Visible Light Photocatalytic

The pompon-like microspheres of AgIn5S8 with a cubic phase were prepared in a low temperature aqueous solution using mercaptoacetic acid as capping agent and thioacetamide as sulfur source and characterized with XRD, UV-vis absorption spectra, SEM and BET analysis. It is interesting that the microspheres are quite open and puffy. More importantly,the obtained microspheres showed remarkable photocatalytic activity for the degradation of methyl orange under visible light irradiation, which is probably due to the pompon-like morphology for providing reactive sites and facilitating the charge transfer between the target pollutant and the photocatalyst. This method could be extended to the synthesis of other functional micro/nano materials.

Synthesis and Structure of (π-Arene)titanium(II) Haloaluminate Complexes with Diarylmethane Ligands

2000 ◽  
Vol 65 (2) ◽  
pp. 192-202 ◽  
Author(s):  
Volkmar Kupfer ◽  
Karel Mach ◽  
Ulf Thewalt
Keyword(s):  
Crystal Structures ◽  
Ligand Exchange ◽  
Exchange Reactions ◽  
Mild Conditions ◽  
Phenyl Rings

Novel (arene)titanium(II) haloaluminate complexes (η6-arene)Ti[(μ-X)2AlX2]2 (X = Cl, Br) were obtained from (η6-benzene)Ti[(μ-X)2AlX2]2 (X = Cl, Br) complexes by ligand exchange reactions with bis(pentamethylphenyl)methane and dimesitylmethane. The [η6-1,2,3,4,5- pentamethyl-6-(2,3,4,5,6-pentamethylbenzyl)benzene]Ti[(μ-X)2AlX2]2 (X = Cl, Br) and [η6-1,3,5- trimethyl-2-(2,4,6-trimethylbenzyl)benzene]Ti[(μ-Br)2AlBr2]2 complexes containing titanium coordinated to only one of the two phenyl rings were obtained and their crystal structures were determined. (η6-Benzene)Ti[(μ-Cl)2AlCl2]2 and dimesitylmethane afforded the (η6-mesi- tylene)Ti[(μ-Cl)2AlCl2]2 complex which is isotypic with the known bromo analogue. This product shows that Friedel-Crafts scission of aryl-alkyl bonds occurs in such systems even under mild conditions.

Metal(II) Schiff base complexes as catalysts for the high-regioselective conversion of epoxides to β-hydroxy nitriles in glycol solvents

2006 ◽  
Vol 84 (11) ◽  
pp. 1575-1579 ◽  
Author(s):  
Hossein Naeimi ◽  
Mohsen Moradian
Keyword(s):  
Schiff Base ◽  
Ring Opening ◽  
Potassium Cyanide ◽  
Biologically Active ◽  
Schiff Base Complexes ◽  
Mild Conditions ◽  
Ring Opening Of Epoxides ◽  
Facile Preparation ◽  
High Yields

A facile preparation of 3-hydroxy propanenitrile derivatives is described involving ring opening of epoxides with potassium cyanide in glycol solvents in the presence of Schiff base complexes as catalysts. This method occurs under neutral and mild conditions with high yields and high regioselectivity. Thus, several β-Hydroxy nitriles, useful intermediates toward biologically-active molecules, are easily obtained at room temperature.Key words: β-hydroxy nitrile, Schiff base, epoxide, glycol, catalyst.

scholarly journals Synthesis, Characterization, and Crystal Structure of Pyridinium Tetrakis{1-trifluoromethyl-3-(1′-pyreno)-1,3-propanedionato}lanthanate(III) Complex

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
Tetsuji Moriguchi ◽  
Kenji Yoza ◽  
Akihiko Tsuge
Keyword(s):  
Ligand Exchange ◽  
Fast Atom Bombardment ◽  
Proton Nuclear Magnetic Resonance ◽  
Resonance Spectroscopy ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Mild Conditions ◽  
Polycyclic Aromatic ◽  
Halide Ligand

The reaction of 1-trifluoromethyl-3-(1′-pyreno)-1,3-propanedione with lanthanum(III) trichloride in the presence of pyridine leads to halide ligand exchange, yielding a novel pyridinium tetrakis{1-trifluoromethyl-3-(1′-pyreno)-1,3-propanedionato}lanthanate(III) complex with four polycyclic aromatic hydrocarbon moieties. This reaction easily proceeds under mild conditions (25°C, 24 h) producing the complex in a 90% isolated yield. The complex was characterized by infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, and positive fast atom bombardment mass spectrometry, and its precise structure was determined by single crystal X-ray diffraction. Ultraviolet-visible spectroscopy, fluorescence spectroscopy, and X-ray analysis demonstrated that the four pyrene moieties were independently oriented.

ChemInform Abstract: Facile Preparation of Aryl Sulfides Using Palladium Catalysis under Mild Conditions.

ChemInform ◽  
2011 ◽  
Vol 42 (14) ◽  
pp. no-no
Author(s):  
Tatsuo Okauchi ◽  
Kouji Kuramoto ◽  
Mitsuru Kitamura
Keyword(s):  
Palladium Catalysis ◽  
Mild Conditions ◽  
Facile Preparation ◽  
Aryl Sulfides

Facile Preparation of Aryl Sulfides Using Palladium Catalysis under Mild Conditions

Synlett ◽  
2010 ◽  
Vol 2010 (19) ◽  
pp. 2891-2894 ◽  
Author(s):  
Tatsuo Okauchi ◽  
Kouji Kuramoto ◽  
Mitsuru Kitamura
Keyword(s):  
Palladium Catalysis ◽  
Mild Conditions ◽  
Facile Preparation ◽  
Aryl Sulfides

A facile preparation of CoFe2O4 nanoparticles on polyaniline-functionalised carbon nanotubes as enhanced catalysts for the oxygen evolution reaction

2016 ◽  
Vol 4 (12) ◽  
pp. 4472-4478 ◽  
Author(s):  
Yang Liu ◽  
Jing Li ◽  
Feng Li ◽  
Wenzhu Li ◽  
Haidong Yang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Cofe2o4 Nanoparticles ◽  
Multiwalled Carbon ◽  
Mild Conditions ◽  
Facile Preparation

A polyaniline-multiwalled carbon nanotube supported, high performance CoFe2O4 nanoparticle loaded electrocatalyst is synthesized through a novel and simple in situ process under mild conditions.

scholarly journals Transformation from [Au25(SCH2CH2CH2CH3)18]0 to Au28(SCH2CH(CH3)Ph)21 gold nanoclusters: gentle conditions is enough

2019 ◽  
Vol 55 (99) ◽  
pp. 14914-14917 ◽  
Author(s):  
Yanan Wang ◽  
Belén Nieto-Ortega ◽  
Thomas Bürgi
Keyword(s):  
Exchange Reaction ◽  
Ligand Exchange ◽  
Gold Nanoclusters ◽  
Ligand Exchange Reaction ◽  
Mild Conditions

Herein we report the transformation of [Au25(SR)18]0 into Au28(SR)21 induced by ligand exchange reaction under mild conditions.

scholarly journals Facile preparation of β-/γ-MgH2 nanocomposites under mild conditions and pathways to rapid dehydrogenation

2016 ◽  
Vol 18 (15) ◽  
pp. 10492-10498 ◽  
Author(s):  
Xuezhang Xiao ◽  
Zhe Liu ◽  
Sina Saremi-Yarahmadi ◽  
Duncan H. Gregory
Keyword(s):  
Hydrogen Release ◽  
Chemical Route ◽  
Mild Conditions ◽  
Wet Chemical ◽  
Wet Chemical Route ◽  
Facile Preparation ◽  
Rapid Kinetics

A γ-MgH2/β-MgH2 nanocomposite can be synthesized via a simple wet chemical route with THF, releasing 6.6 wt% H2 with rapid kinetics; initial hydrogen release arises either directly from meta-stable γ-MgH2 or immediately following its transformation into β-MgH2.

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