Synthesis and Theoretical Studies of a Double Helical Complex with the Ligand 4′,4′′′‐Bis(ferrocenyl)‐2,2′:6′,2′′:6′′,2′′′:6′′′,2′′′′‐quinquepyridine

Aguado, Javier E.; Calhorda, Maria José; Costa, Paulo J.; Crespo, Olga; Félix, Vı́tor; Gimeno, M. Concepción; Jones, Peter G.; Laguna, Antonio

doi:10.1002/ejic.200400057

Cited by 20 publications

(8 citation statements)

References 59 publications

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“…The entire arrangement of the ligands around the silver(I) centres results in a significant ligand‐supported AgAg bond (Table ) similar to that of silver(I) complexes of terpydirine derivatives previously reported . This type of coordination causes deviation of one of the exterior pyridinyl rings from the plane of the other chelating pyridinyl rings.…”

Section: Resultssupporting

confidence: 65%

Synthesis, characterization, antimicrobial screening and DNA binding of novel silver(I)–thienylterpyridine and silver(I)–furylterpyridine complexes

Njogu

Martincigh

Omondi

et al. 2018

Applied Organom Chemis

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Six new silver(I) complexes, [(AgL1) 2 ](ClO 4 ) 2 (1), [(AgOTfL1) 2 ] (2), [(AgO 2 CF 3 L1) 2 ] (3), [AgL2](ClO 4 ) 2 (4), [(AgOTfL2) 2 ] (5) and [(AgO 2 CF 3 L2) 2 ] (6), were synthesized by reaction of 4′-(2-thienyl)-2,2′;6′,2″-terpyridine (L1)or 4′-(2-furyl)-2,2′;6′,2″-terpyridine (L2) with the respective silver salts, i.e. AgClO 4 , AgOTf or AgTFA. The complexes are dinuclear of the type Ag 2 L 2 in which the two ligands utilize the pyridinyl N atoms from the central rings and one of the peripheral rings to coordinate to one of the silver(I) centres while the remaining pyridinyl N atoms coordinate to the second silver(I) centre. Complexes 2 and 5 have the trifluoromethanesulfonate anion remotely coordinating via a single O atom while complex 3 has the trifluoroacetate anion coordinating to a single silver(I) centre in a bidentate mode. The perchlorate anion in complex 4 is excluded from the silver(I) coordination sphere.All complexes demonstrate moderate to high antimicrobial activity against the Gram-negative bacteria Escherichia coli and Salmonella typhimirium and the fungus Candida albicans. Complexes 1-6 interact strongly with salmon testes DNA as indicated by the steady increase in the relative viscosity of DNA solutions with increasing concentration of the silver(I) complexes and the relatively large intrinsic binding constants measured. There was substantial hyperchromism and hypsochromism recorded in solutions of complexes 1-6 with increasing concentration of salmon testes DNA. Complexes 1-6 interact with DNA via intercalation, and groove and external binding.

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Section: Resultssupporting

confidence: 65%

Synthesis, characterization, antimicrobial screening and DNA binding of novel silver(I)–thienylterpyridine and silver(I)–furylterpyridine complexes

Njogu

Martincigh

Omondi

et al. 2018

Applied Organom Chemis

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“…The electronic absorption spectrum for ligand L in acetonitrile was measured on a Shimadzu UV 2401 PC spectrometer, with λ max in nm and ε (×10 4 ) in  -1 cm -1 . The luminescence spectrum for ligand L in CH 3 CN was recorded using a Perkin-Elmer MPF-3 spectrofluorimeter. Microanalyses were obtained using a Perkin-Elmer 2400 CHN microanalyzer.…”

Section: Methodsmentioning

confidence: 99%

Self‐Assembly and Characterization of Grid‐Type Copper(I), Silver(I), and Zinc(II) Complexes

et al. 2005

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The reactions of ligand L, which comprises two bidentate binding units, with copper(I), silver(I), and zinc(II) lead to the self‐assembly of the expected supramolecular architectures 1–3, respectively, of the [2 × 2] grid type, containing four ions in tetrahedral coordination sites. The grid‐type structures are assigned on the basis of the spectroscopic data in solution, and confirmed in the solid state in the case of complex 2 by X‐ray crystallography. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)

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“…[261] As perhaps expected, similar structures arise with terpyridyls (81 a) or a quinquepyridine (81 b). [262][263][264] A particularly intimate aggregation by semi-supported Ag-Ag contacts has been found in the 1:1 complex of AgPF 6 with the terpyridine 81 a phenylated in the 4-position. Pairs of silver atoms are tied up by two tpy ligands to have one silver atom two-coordinated and the other four-coordinated by the six nitrogen donors (81 c).…”

Section: Carboxylate Oo-mono-bridgingmentioning

confidence: 99%

Argentophilic Interactions

2014

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The decade 1990-2000 saw a growing interest in aurophilic interactions in gold chemistry. These interactions were found to influence significantly a variety of structural and other physical characteristics of gold(I) compounds. The attention paid to this unusual and counterintuitive type of intra- and intermolecular bonding between seemingly closed-shell metal centers has rapidly been extended to also include silver chemistry. Hundreds of experimental and computational studies have since been dedicated to the argentophilicity phenomenon. The results of this development are reviewed herein focusing on molecular systems where two or more silver(I) centers are in close contact leading to specific structural characteristics and a variety of novel physical properties. These include strongly modified ligand-to-metal charge-transfer processes observed in absorption and emission spectroscopy, but also colossal positive and negative thermal expansion on the one hand and unprecedented negative linear compressibility of crystal parameters on the other.

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Synthesis and Theoretical Studies of a Double Helical Complex with the Ligand 4′,4′′′‐Bis(ferrocenyl)‐2,2′:6′,2′′:6′′,2′′′:6′′′,2′′′′‐quinquepyridine

Cited by 20 publications

References 59 publications

Synthesis, characterization, antimicrobial screening and DNA binding of novel silver(I)–thienylterpyridine and silver(I)–furylterpyridine complexes

Synthesis, characterization, antimicrobial screening and DNA binding of novel silver(I)–thienylterpyridine and silver(I)–furylterpyridine complexes

Self‐Assembly and Characterization of Grid‐Type Copper(I), Silver(I), and Zinc(II) Complexes

Argentophilic Interactions

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