scholarly journals Halide-bridged Polymers of d10Metals with Heterocyclic Type Donor Ligands

2014 ◽  
Vol 70 (a1) ◽  
pp. C1025-C1025
Author(s):  
Cara Slabbert ◽  
Melanie Rademeyer
Keyword(s):  
Optical Properties ◽  
Self Assembly ◽  
Bulk Composition ◽  
Organic Ligands ◽  
Donor Ligands ◽  
Metal Halides ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
X Ray ◽  
Wide Range

Molecular self-assembly of organic ligands and inorganic metal halides leads to the formation of layered nano-composite organic-inorganic hybrid materials. The formation of both ionic- and coordination hybrids is possible. Both of these materials have attracted much attention recently in the field of Crystal Engineering [1], due to the retention and combination of desired inherent properties of both constitutional moieties, which then renders these materials multifunctional with a wide range of potential technological applications. Properties attributed to the organic component include structural diversity and optical properties [2], with mechanical hardness, electronic-, magnetic- and optical properties ascribed to the inorganic component. The coordination of an organic amine functionality to a metal halide results in the formation of halide-bridged polymers coordinated to donor ligands, with reported properties including non-linear optic (NLO) behavior, magnetic properties [3] and electronic semi-conduction. Literature confirms the technological importance of these materials and identifies the need for research aiming at a fundamental understanding of factors that control the observed structural trends and to relate chemical composition and topology of these compounds to ultimately enable retrosynthesis from desired property. In this study, a range of different divalent d10metal halides are combined with different aromatic nitrogen-containing organic ligands. The effects of change in metal atom, halide atom, stoichiometry and reaction conditions on the structural trends in the crystal systems are investigated. The molecular self-assembly of the said halide-bridged polymers is initiated by simple synthetic techniques under relatively mild conditions, at the most, hydrothermal reaction conditions. Structural characterisation was done employing single crystal X-ray diffraction, while bulk composition of the samples was investigated using powder X-ray diffraction.

C-H bond Activation/Arylation over Arene-Ruthenium(II)-picolinate Complexes: Synthesis, Structure and Catalytic Activity

2017 ◽  
Author(s):  
Chinky Binnani ◽  
Rohit K. Rai ◽  
Deepika Tyagi ◽  
Shaikh M Mobin ◽  
Sanjay Kumar Singh
Keyword(s):  
Catalytic Activity ◽  
Bond Activation ◽  
Ruthenium Catalysts ◽  
Molecular Structures ◽  
Water Soluble ◽  
Aryl Halides ◽  
Donor Ligands ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
Wide Range

<p>A series of water soluble arene-ruthenium(II) complexes [(<i>η</i><sup>6</sup>-arene)RuCl(κ<sup>2</sup>-L)]<sup>n+</sup> (n = 0, 1) (<b>[Ru]-1</b> – <b>[Ru]-12</b>) containing pyridine based N,O or N,N ligands (<b>L1-L6</b>) were synthesized and employed for the catalytic C-H bond activation/ arylation of 2-phenylpyridine with aryl halides in water. Efficient C-H bond activation/ arylation of a wide range of substituted 2-phenylpyridines and aryl halides were achieved to afford corresponding mono and biarylated products. Exploring the reactivity of the synthesized complexes, our investigation with ruthenium catalysts inferred that pyridine based N,O donor ligands afforded enhanced catalytic activity compared to those obtained with the iminopyridine (N,N donor) ligands. Further, mass spectrometric investigations, during the catalytic and controlled reaction conditions, evidenced the presence of the crucial cycloruthenated species {(<i>η</i><sup>6</sup>-<i>p</i>-cymene)Ru(<i>κ</i><sup>2</sup>-<i>CN</i>-phenylpyridine)}<sup>+</sup> (m/z [M<sup>+</sup>] 390.0), along with a ligand coordinated species, {(<i>η</i><sup>6</sup>-<i>p</i>-cymene)Ru(<b>L1</b>)(<i>κ</i><sup>2</sup>-<i>CN</i>-phenylpyridine)}<sup>+</sup> (m/z [M<sup>+</sup>]+Na 539.0), suggesting the important role such intermediate species in C-H bond activation reactions. Moreover, molecular structures for few of the representative complexes were also authenticated by single crystal X-ray diffraction studies.</p>

Oxygen and peroxide bridged uranyl(vi) dimers bearing tetradentate hybrid ligands: supramolecular self-assembly and generation pathway

2020 ◽  
Vol 7 (18) ◽  
pp. 3412-3423 ◽  
Author(s):  
Jun Liu ◽  
Xueyu Wang ◽  
Baihua Chen ◽  
Lina Lv ◽  
Qiang Li ◽  
...  
Keyword(s):  
Single Crystal ◽  
Self Assembly ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
X Ray ◽  
Hybrid Ligands

Crystals of U(vi) complexes with N,N,N′,N′-tetramethyl-2,2′-bipyridine-6,6′-dicarboxamide and N,N,N′,N′-tetramethyl-1,10-phenanthroline-2,9-dicarboxamide were obtained under variable reaction conditions, and the structures were determined by single-crystal X-ray diffraction.

Synthesis, structural characterization, and properties of three Ag(I) complexes with oxazoline-containing chiral ligands

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Hai-Wei Kuai ◽  
Xiao-Chun Cheng ◽  
Xiao-Hong Zhu
Keyword(s):  
Optical Properties ◽  
Ir Spectroscopy ◽  
Single Crystal ◽  
Structural Characterization ◽  
Nonlinear Optical ◽  
Organic Ligands ◽  
Silver Complexes ◽  
X Ray Diffraction ◽  
X Ray ◽  
Silver Salts

Abstract The two enantiopure chiral organic ligands 2-[(S)-4-isopropyl-2-oxazolyl]quinoline (L1) and 2-[(S)-4-benzyl-2-oxazolyl]quinoline (L2) react with different silver salts to give rise to three new silver complexes [Ag(L1)2](SbF6) (1), [Ag(L1)(CH3CN)](ClO4) (2), and [Ag(L2)(NO3)] (3), which have been characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental and thermogravimetric analyses. Complexes 1–3 all display discrete mononuclear structures. The nonlinear optical properties of 1–3 were investigated.

scholarly journals Interaction of 4-{[(tolyl(methane)sulphonyl)oxy]imino}cyclohexa-2,5-dien-1-ones with N-nucleophiles

2021 ◽  
pp. 3-11
Author(s):  
A.P. Avdeenko ◽  
◽  
S.A. Konovalova ◽  
I.Yu. Yakymenko ◽  
V.M. Baumer ◽  
...  
Keyword(s):  
Redox Potential ◽  
Diffraction Data ◽  
Sulfonic Acid ◽  
Biological Activities ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
X Ray ◽  
Wide Range ◽  
Substituted Hydrazines ◽  
Lower Basicity

Hydrazones of 1,4-benzoquinone, which have a wide range of biological activities, can be synthesized in the reactions of 4-{[(arylsulfonyl)oxy]imino}cyclohexa-2,5-diene-1-ones or N-(4-oxocyclohexa-2,5-diene-1-ylidene)arylsulfonamides with N-substituted hydrazines. In this study, the reaction of 2,6-disubstituted 4-{[(tolyl(methane)sulfonyl)oxy]imino}cyclohexa-2,5-diene-1-ones with aroylhydrazides gave N'-(3,5-dialkyl-4-oxocyclohexa-2,5-diene-1-ylidene)aroylhydrazides, which can be obtained by cross-synthesis in the reaction of N-(3,5-dialkyl-4-oxocyclohexa-2,5-dien-1-ylidene)arylsulfonamides with aroylhydrazides. As a result of the reaction of 4-{[(tolyl(methane)sulfonyl)oxy]imino}cyclohexa-2,5-dien-1-ones with phenylhydrazine, stable 4-hydroxyanilinium tolyl(methane)sulfates were isolated. Their structures were confirmed by X-ray diffraction data. We suggested that at the first stage of the reaction between 4-{[(tolyl(methane)sulfonyl)oxy]imino}cyclohexa-2,5-diene-1-ones and hydrazines, the N–O bond of starting 4-(oxyimino)cyclohexa-2,5-diene-1-one was broken forming sulfonic acid and corresponding quinoneimine. The latter either can be reduced to corresponding aminophenol under reaction conditions or can react with an excess of N-substituted hydrazine yielding corresponding hydrazide. The formation of N'-(4-oxocyclohexa-2,5-diene-1-ylidene)arohydrazides is facilitated by a lower basicity of hydrazide and a lower redox potential of quinoneimine.

scholarly journals Structure and Surface Passivation of Ultrathin Cesium Lead-Halide Nanoplatelets Revealed by Multilayer Diffraction

2021 ◽  
Author(s):  
Stefano Toso ◽  
Dmitry Baranov ◽  
Cinzia Giannini ◽  
Liberato Manna
Keyword(s):  
Optical Properties ◽  
Surface Passivation ◽  
Organic Ligands ◽  
X Ray Diffraction ◽  
Bulk Materials ◽  
X Ray ◽  
Natural Tendency ◽  
Halide Perovskite ◽  
Compositional Characterization ◽  
Lead Halide

The research on bidimensional colloidal semiconductors has received a boost from the emergence of ultrathin lead-halide perovskite nanoplatelets. While the optical properties of these materials have been widely investigated, their accurate structural and compositional characterization is still challenging. Here, we exploited the natural tendency of the platelets to stack into highly ordered films, which can be treated as single crystals made of alternating layers of organic ligands and inorganic nanoplatelets, to investigate their structure by Multilayer Diffraction. Using X-ray diffraction alone, this method allowed to refine the structure of ∼12 Å thick Cs-Pb-Br perovskite and ∼25 Å thick Cs-Pb-Cl-I Ruddlesden-Popper nanoplatelets by precisely measuring their thickness, stoichiometry, surface passivation type and coverage, as well as deviations from the crystal structures of the corresponding bulk materials. It is noteworthy that a single, readily available experimental technique, coupled with proper modeling, provides access to such detailed structural and composition information.

C-H bond Activation/Arylation over Arene-Ruthenium(II)-picolinate Complexes: Synthesis, Structure and Catalytic Activity

2017 ◽  
Author(s):  
Chinky Binnani ◽  
Rohit K. Rai ◽  
Deepika Tyagi ◽  
Shaikh M Mobin ◽  
Sanjay Kumar Singh
Keyword(s):  
Catalytic Activity ◽  
Bond Activation ◽  
Ruthenium Catalysts ◽  
Molecular Structures ◽  
Water Soluble ◽  
Aryl Halides ◽  
Donor Ligands ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
Wide Range

<p>A series of water soluble arene-ruthenium(II) complexes [(<i>η</i><sup>6</sup>-arene)RuCl(κ<sup>2</sup>-L)]<sup>n+</sup> (n = 0, 1) (<b>[Ru]-1</b> – <b>[Ru]-12</b>) containing pyridine based N,O or N,N ligands (<b>L1-L6</b>) were synthesized and employed for the catalytic C-H bond activation/ arylation of 2-phenylpyridine with aryl halides in water. Efficient C-H bond activation/ arylation of a wide range of substituted 2-phenylpyridines and aryl halides were achieved to afford corresponding mono and biarylated products. Exploring the reactivity of the synthesized complexes, our investigation with ruthenium catalysts inferred that pyridine based N,O donor ligands afforded enhanced catalytic activity compared to those obtained with the iminopyridine (N,N donor) ligands. Further, mass spectrometric investigations, during the catalytic and controlled reaction conditions, evidenced the presence of the crucial cycloruthenated species {(<i>η</i><sup>6</sup>-<i>p</i>-cymene)Ru(<i>κ</i><sup>2</sup>-<i>CN</i>-phenylpyridine)}<sup>+</sup> (m/z [M<sup>+</sup>] 390.0), along with a ligand coordinated species, {(<i>η</i><sup>6</sup>-<i>p</i>-cymene)Ru(<b>L1</b>)(<i>κ</i><sup>2</sup>-<i>CN</i>-phenylpyridine)}<sup>+</sup> (m/z [M<sup>+</sup>]+Na 539.0), suggesting the important role such intermediate species in C-H bond activation reactions. Moreover, molecular structures for few of the representative complexes were also authenticated by single crystal X-ray diffraction studies.</p>

Luminescent Gold(I)-Thallium(I) Arrays through N-Bidentate Building Blocks

2004 ◽  
Vol 59 (11-12) ◽  
pp. 1379-1386 ◽  
Author(s):  
Eduardo J. Fernández ◽  
Peter G. Jones ◽  
Antonio Laguna ◽  
José M. López-de-Luzuriaga ◽  
Miguel Monge ◽  
...  
Keyword(s):  
Solid State ◽  
Crystal Structures ◽  
Three Dimensional ◽  
Building Blocks ◽  
Donor Ligands ◽  
X Ray Diffraction ◽  
Donor Ligand ◽  
X Ray ◽  
Wide Range

Heteropolynuclear gold(I)-thallium(I) complexes of the type [TlLn][Au(C6F5)2] (L = py (2), 2,2’- bipy (3), 1,10-phen (4) or 4,4’-bipy and THF (5); n = 1, 2) have been obtained from reactions of the corresponding N-donor ligands with the precursor {Tl[Au(C6F5)2]}n (1). The crystal structures of complexes 3 - 5 have been determined by X-ray diffraction showing one- (3, 4) or three-dimensional (5) arrays. All complexes are photoluminescent in the solid state at RT and at 77 K. The strong visible emissions of complexes 2 - 5 are displayed over a wide range of wavelengths (460 - 620 nm) depending on the environment of the thallium(I) centres and on the nature of the N-donor ligand.

C–H⋯Br–C vs. C–Br⋯Br–C vs. C–Br⋯N bonding in molecular self-assembly of pyridine-containing dyes

RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 53669-53678 ◽  
Author(s):  
Damir A. Safin ◽  
Maria G. Babashkina ◽  
Koen Robeyns ◽  
Yann Garcia
Keyword(s):  
Optical Properties ◽  
Single Crystal ◽  
Surface Analysis ◽  
Self Assembly ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
X Ray Diffraction ◽  
X Ray

We have studied N-(5-bromosalicylidene)-x-aminopyridine dyes (x = 2, 1; 3, 2; 4, 3) by means of single crystal X-ray diffraction and Hirshfeld surface analysis. Their optical properties were also examined and correlated with structural findings.

Synthesis, structural characterization, and properties of Ag(I) complexes with N-donor ligands

2018 ◽  
Vol 73 (6) ◽  
pp. 423-428
Author(s):  
Xiao-Hong Zhu ◽  
Xiao-Chun Cheng ◽  
Deng-Hao Li ◽  
Yun-Hua Qian
Keyword(s):  
Optical Properties ◽  
Thermogravimetric Analysis ◽  
Nonlinear Optical ◽  
Donor Ligands ◽  
Framework Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
3D Framework ◽  
Coordination Reaction ◽  
Mononuclear Structure

AbstractNew silver complex [Ag(pz)(CF3SO3)] (1) was formed by the coordination reaction of AgCF3SO3with pyrazine (pz) in the presence of 2-[(S)-4-isopropyl-2-oxazolyl] quinoline (L). When AgBF4was used instead of AgCF3SO3as the starting material, complex2[Ag(L)(CH3CN)](BF4) was obtained. Complexes1and2are characterized by single-crystal X-ray diffraction, IR spectroscopy and elemental, and thermogravimetric analysis. Complex1shows a 3D framework structure with uni-nodal eight-connected (424.64) topology while complex2displays a discrete mononuclear structure. The nonlinear optical properties of2were investigated.

Self-Assembly Optical Components

2003 ◽  
Vol 771 ◽  
Author(s):  
Pavel I. Lazarev ◽  
Michael V. Paukshto ◽  
Elena N. Sidorenko
Keyword(s):  
Optical Properties ◽  
Self Assembly ◽  
Crystalline State ◽  
Liquid Crystalline ◽  
Film Deposition ◽  
X Ray Diffraction ◽  
Optical Components ◽  
Crystal Film ◽  
Solid Film ◽  
Thin Crystal

AbstractWe report a new method of Thin Crystal Film deposition. In the present paper we describe the method of crystallization, structure, and optical properties of Bisbenzimidazo[2,1-a:1',2',b']anthra[2,1,9-def:6,5,10-d'e'f']-diisoquinoline-6,9-dion (mixture with cis-isomer) (abbreviated DBI PTCA) sulfonation product. The Thin Crystal Film has a thickness of 200-1000 nm, with anisotropic optical properties such as refraction and absorption indices. X-ray diffraction data evidences a lyotropic liquid crystalline state in liquid phase and crystalline state in solid film. Anisotropic optical properties of the film make it useful in optical devices, e.g. liquid crystal displays.

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