Silver(<scp>i</scp>) coordination chemistry: from 1-D chains to molecular rectangles

Haj, Mohammad Abul; Aakeröy, Christer B.; Desper, John

doi:10.1039/c2nj40669a

Cited by 39 publications

(9 citation statements)

References 51 publications

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“…Recently, great attention has been devoted to phenyl-imidazole-based metal complexes by many researchers in both industry and academia because of their vast applicability to molecular electronics. − In particular, phenyl-imidazole-based iridium(III) complexes are considered strong candidates as triplet emitters in blue phosphorescent organic light-emitting diodes (PHOLEDs). , Despite these broad investigations, reports concerning the structural diversity and photoluminescence of pyridyl-imidazole-based ligands in group-11 metal complexes are scarce, and related research is limited . Among coordination polymers of group-11 elements, Ag(I) coordination polymers have been demonstrated to exhibit structural diversity as a result of the d 10 configuration of the Ag(I) ion. − Moreover, the various coordination environments around the Ag(I) center are generally constructed by the ligands, solvent molecules, and counteranions.…”

Section: Introductionmentioning

confidence: 99%

“…Irrespective of the coordination of solvent molecules to the Ag(I) center, the formation of Ag(I) coordination polymers substantially influences the counteranions. − Therefore, we envision that the polymeric structures and photoluminescent properties of pyridyl-imidazole-based silver(I) complexes would be highly dependent upon simple variations in the silver counteranion. Until now, only three examples of pyridyl-imidazole-based silver(I) complexes have been reported in the literature. ,, …”

Section: Introductionmentioning

confidence: 99%

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Role and Effect of Anions in the Construction of Silver Complexes Based on a Pyridylimidazole Ligand with L-Type Coordination Vectors and Their Photoluminescence Properties

Lee

Kang

Cho

et al. 2016

Crystal Growth & Design

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Three anion-dependent Ag(I) coordination complexesspecifically, [Ag 2 (pyim) 2 (NO 3 ) 2 ] (1), {[Ag(pyim) 2 ]• ClO 4 •CH 3 OH•(H 2 O) 1.25 } n (2), and [Ag 4 (pyim) 4 ]•(CF 3 SO 3 ) 4 ( 3)were prepared by the reaction of the corresponding silver salts with a rigid ditopic N-terphenyl-substituted 2-(4-pyridyl)imidazole (pyim) ligand possessing an "L"-type coordination vector. Complex 1, in which the nitrate anion acts as a monodentate terminal ligand, exhibits a discrete cyclic dimer structure, whereas complex 2, incorporating a perchlorate anion with weak coordination ability, displays an anion-free one-dimensional (1D) looped chain structure resulting from the Ag sharing of consecutive cyclic dimers. When using a trifluoromethanesulfonate (triflate) as a counteranion with moderate affinity toward the metal center, the resulting complex 3 exhibits an unusual cyclic tetramer structure. In 3, the triflate anions act as bridges between adjacent cyclic tetramers via the weak interaction with the Ag(I) ions, yielding a parquet-like two-dimensional (2D) framework. All three complexes display violet-blue emission, with maxima ranging from 388 to 396 nm. Furthermore, in solution, complex 2 exhibits a substantial emission enhancement, resulting in an emission intensity nearly 2 orders of magnitude greater than those of both the free ligand and the two other Ag(I) complexes, 1 and 3. Counteranions possessing different abilities to coordinate to Ag(I) play important roles in the structural diversity and photoluminescence properties of 1−3.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Role and Effect of Anions in the Construction of Silver Complexes Based on a Pyridylimidazole Ligand with L-Type Coordination Vectors and Their Photoluminescence Properties

Lee

Kang

Cho

et al. 2016

Crystal Growth & Design

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“…In an asymmetric unit, two molecules of 1 are linked to each other via ap y À Ag + À py linkage.T he average Ag À Nb ond length (2.120 )a nd N À Ag À Nb ond angle (172.28 8)a re very similar to the ordinary AgÀN(py) coordination bonds with linear geometry. [17] It is of note that the structural feature of 1a is distinct from the MPFs reported previously.T wo molecules of 1 in the asymmetric unit showed non-identical helical conformations, one with at ypical 12-helix and the other with an unusual 8helix (Figure 1b). The12-helix and 8-helix are joined together alternatingly via head-to-head and tail-to-tail py À Ag + À py linkages to form ac oordination chain (Figure 1e).…”

Section: Methodsmentioning

confidence: 62%

Conformational Adaptation of β‐Peptide Foldamers for the Formation of Metal–Peptide Frameworks

et al. 2021

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Metal‐coordinated frameworks derived from small peptidic ligands have received much attention thanks to peptides’ vast structural and functional diversity. Various peptides with partial conformational preferences have been used to build metal–peptide frameworks, however, the use of conformationally constrained β‐peptide foldamers has not been explored yet. Herein we report the first metal‐coordination‐mediated assembly of β‐peptide foldamers with 12‐helical folding propensity. The coordination of Ag+ to the terminal pyridyl moieties afforded a set of metal–peptide frameworks with unique entangled topologies. Interestingly, formation of the network structures was accompanied by notable conformational distortions of the foldamer ligands. As the first demonstration of new metal–peptide frameworks built from modular β‐peptide foldamers, we anticipate that this work will be an important benchmark for further structural evolution and mechanistic investigation.

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“…Here, a certain amount of AgBF 4 was added into the mixture of standards or crude oil, by which Ag + is first allowed to selectively coordinate with sulfur atoms to form complex Ag + adducts over a short time [ 26 ], then the alkylating reagent was added dropwise to the system and the S-C covalent bond was formed by the strong driving force of the precipitation of silver iodide (AgI). This derivatization procedure allows detection of sulfur compounds with very high selectivity, and meanwhile avoids the extra complications arising from silver complexation [ 22 , 27 ] and silver natural isotopes (51.84% 107 Ag and 48.16% 109 Ag) [ 20 ]. The implementation of multi-chemical methods combined with the ultrahigh resolution mass spectrometry (FT-ICR MS and Orbitrap FTMS) with electrospray ionization offers an efficient and feasible approach to detect the sulfur-containing species directly from the heavy petroleum without any time-consuming fractionation and separation.…”

Section: Resultsmentioning

confidence: 99%

“…Metal complexation methods, such as Pd 2+ electrospray mass spectrometry (ESI-MS) [ 18 ] and especially Ag + ESI-MS [ 19 ], have also been developed for the detection of sulfur-containing compounds in petroleum by the formation of positive metal-complexes [ 20 ]. However, the relatively flexible coordination sphere of the metal ions allows them to coordinate with a variety of ligands even the solvents with the coordination numbers from 2 to 6, which on some level, increases the complexity of crude oil analysis [ 19 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Selective Analysis of Sulfur-Containing Species in a Heavy Crude Oil by Deuterium Labeling Reactions and Ultrahigh Resolution Mass Spectrometry

Xu-xiao

Schräder

2015

IJMS

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A heavy crude oil has been treated with deuterated alkylating reagents (CD3I and C2D5I) and directly analyzed without any prior fractionation and chromatographic separation by high-field Orbitrap Fourier Transform Mass Spectrometry (FTMS) and Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) using electrospray ionization (ESI). The reaction of a polycyclic aromatic sulfur heterocycles (PASHs) dibenzothiophene (DBT), in the presence of silver tetrafluoroborate (AgBF4) with ethyl iodide (C2H5I) in anhydrous dichloroethane (DCE) was optimized as a sample reaction to study heavy crude oil mixtures, and the reaction yield was monitored and determined by proton nuclear magnetic resonance spectroscopy (1H-NMR). The obtained conditions were then applied to a mixture of standard aromatic CH-, N-, O- and S-containing compounds and then a heavy crude oil, and only sulfur-containing compounds were selectively alkylated. The deuterium labeled alkylating reagents, iodomethane-d3 (CD3I) and iodoethane-d5 (C2D5I), were employed to the alkylation of heavy crude oil to selectively differentiate the tagged sulfur species from the original crude oil.

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Silver(i) coordination chemistry: from 1-D chains to molecular rectangles

Cited by 39 publications

References 51 publications

Role and Effect of Anions in the Construction of Silver Complexes Based on a Pyridylimidazole Ligand with L-Type Coordination Vectors and Their Photoluminescence Properties

Role and Effect of Anions in the Construction of Silver Complexes Based on a Pyridylimidazole Ligand with L-Type Coordination Vectors and Their Photoluminescence Properties

Conformational Adaptation of β‐Peptide Foldamers for the Formation of Metal–Peptide Frameworks

Selective Analysis of Sulfur-Containing Species in a Heavy Crude Oil by Deuterium Labeling Reactions and Ultrahigh Resolution Mass Spectrometry

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