A novel photoluminescent Ag–terpyridyl complex: one-dimensional linear metal string with double-helical structure

Hou, Lei; Li, Dan

doi:10.1016/j.inoche.2004.11.019

Cited by 70 publications

(9 citation statements)

References 24 publications

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“…According to the already reported photoluminescent results of 4 -phenyl-terpyridine, the peak at ca. 380 nm is tentatively assigned to π-π*/MLCT [44]. The peaks of compounds 1, 2, 3, 6, 7, 9, and 10 at low energy region also show interesting patterns, which are temporarily assigned to n-π*/LMCT [45].…”

Section: Photoluminescent Propertiesmentioning

confidence: 90%

Zinc(II) Terpyridine Complexes: Substituent Effect on Photoluminescence, Antiproliferative Activity, and DNA Interaction

Liu

Jiang

et al. 2019

Molecules

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A series of ZnCl2 complexes (compounds 1–10) with 4′-(substituted-phenyl)-2,2′:6′,2′′-terpyridine that bears hydrogen (L1), p-methyl (L2), p-methoxy (L3), p-phenyl (L4), p-tolyl (L5), p-hydroxyl (L6), m-hydroxyl (L7), o-hydroxyl (L8), p-carboxyl (L9), or p-methylsulfonyl (L10) were prepared and then characterized by 1H NMR, electrospray mass-spectra (ESI-MS), IR, elemental analysis, and single crystal X-ray diffraction. In vitro cytotoxicity assay was used to monitor the antiproliferative activities against tumor cells. Absorption spectroscopy, fluorescence titration, circular dichroism spectroscopy, and molecular modeling studied the DNA interactions. All of the compounds display interesting photoluminescent properties and different maximal emission peaks due to the difference of the substituent groups. The cell viability studies indicate that the compounds have excellent antiproliferative activity against four human carcinoma cell lines, A549, Bel-7402, MCF-7, and Eca-109, with the lowest IC50 values of 0.33 (10), 0.66 (6), 0.37 (7), and 1.05 (7) μM, respectively. The spectrophotometric results reveal that the compounds have strong affinity binding with DNA as intercalator and induce DNA conformational transition. Molecular docking studies indicate that the binding is contributed by the π…π stacking and hydrogen bonds, providing an order of nucleotide sequence binding selectivity as ATGC > ATAT > GCGC. These compounds intercalate into the base pairs of the DNA of the tumor cells to affect their replication and transcription, and the process is supposed to play an important role in the anticancer mechanism.

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Section: Photoluminescent Propertiesmentioning

confidence: 90%

Zinc(II) Terpyridine Complexes: Substituent Effect on Photoluminescence, Antiproliferative Activity, and DNA Interaction

Liu

Jiang

et al. 2019

Molecules

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“…The compound is luminescent at room temperature (l ex = 335 nm, l em = 420-500 nm). [265] Ag-Ag contacts between chains formed by bridging silver cations with the ligand 4,4'-bis(1,2,4-triazol-1-ylmethyl)biphenyl are 3.1332(5) and 3.2745(6) long, depending on the mole ratio of the components (with azide as the counterion). [262] Pincer-type ligands H 2 L such as 2,6-bis(5-methyl-1-Hpyrazol-3-yl)pyridine (81 d) are bridging units for silver atoms either in chains [{Ag 2 (H 2 L)}(NO 3 ) 2 H 2 O} n ] or in hexanuclear aggregates [{Ag 6 (HL) 4 }(NO 3 ) 2 ] where one or two pyrazol rings are protonated (R' = H).…”

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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“…Die Verbindung ist bei Raumtemperatur lumineszierend (l exc = 335 nm, l em = 420-500 nm). [265] Die Ag···Ag-Kontakte zwischen Ketten, die durch Verbrückung von Silberkationen mit dem Liganden 4,4'-Bis(1,2,4-triazol-1-ylmethyl)biphenyl gebildet werden, sind je nach Molverhältnis der Komponenten 3.1332(5) und 3.2745(6) lang (mit Azid als Gegenion). [262] Zangenähnliche ("Pincer"-)Liganden H 2 L wie 2,6-Bis(5methyl-1-H-pyrazol-3-yl)pyridin (…”

Section: H Schmidbaur Und a Schierunclassified

Argentophile Wechselwirkungen

2014

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Zwischen 1990 und 2000 wuchs in der Goldchemie das Interesse an aurophilen Wechselwirkungen, nachdem man festgestellt hatte, dass diese eine Vielzahl struktureller und anderer physikalischer Eigenschaften von Gold(I)‐Verbindungen nennenswert beeinflussen. Die Aufmerksamkeit, die man diesem kontraintuitiven inter‐ und intramolekularen Typ von Bindung zwischen Metallzentren mit scheinbar abgeschlossener Elektronenschale entgegenbrachte, hat sich schnell auch auf die Chemie des Silbers ausgeweitet. Hunderte von Untersuchungen widmeten sich seither dem Phänomen der Argentophilie. Dieser Aufsatz gibt einen Überblick über diese Entwicklung mit Hauptaugenmerk auf molekularen Systemen mit zwei oder mehr in engem Kontakt stehenden Silber(I)‐Zentren, was zu spezifischen strukturellen sowie zu einer Vielzahl neuartiger physikalischer Eigenschaften führt. Diese schließen vor allem stark veränderte Ligand→Metall‐Ladungstransferprozesse ein, aber auch eine überdimensionale thermische Kontraktion auf der einen und eine beispiellose negative lineare Kompressibilität von Kristallparametern auf der anderen Seite.

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A novel photoluminescent Ag–terpyridyl complex: one-dimensional linear metal string with double-helical structure

Cited by 70 publications

References 24 publications

Zinc(II) Terpyridine Complexes: Substituent Effect on Photoluminescence, Antiproliferative Activity, and DNA Interaction

Zinc(II) Terpyridine Complexes: Substituent Effect on Photoluminescence, Antiproliferative Activity, and DNA Interaction

Argentophilic Interactions

Argentophile Wechselwirkungen

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