Synthesis and manifold but controllable emission switching of stilbene-appended polyaromatic terpyridine derivatives via aggregation and trans–cis isomerization

Ganguly, Tapan; Pal, P. K.; Paul, Abhijit; Baitalik, Sujoy

doi:10.1016/j.jphotochem.2022.113966

Cited by 4 publications

(2 citation statements)

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“…The terpyridine ligands are synthesized according to our literature reports. 79 The metal complexes are prepared by a straightforward reaction between the ligands and the solvated Ru(II)-terpyridine precursor, [(tpy-PhCH 3 )Ru(Me 2 CO) 3 ] 3+ , obtained upon treating [(tpy-PhCH 3 )RuCl 3 ] with AgBF 4 , followed by their ion exchange using sodium perchlorate. Purification of the complexes is executed by column chromatography and recrystallization from Absorption Spectra.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Luminescent Ruthenium–Terpyridine Complexes Coupled with Stilbene-Appended Naphthalene, Anthracene, and Pyrene Motifs Demonstrate Fluoride Ion Sensing and Reversible Trans–Cis Photoisomerization

Ganguly,

Das,

Maity

et al. 2024

Inorg. Chem.

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A new family of luminescent heteroleptic Ru(II)-terpyridine complexes coupled with stilbene-appended naphthalene, anthracene, and pyrene motifs is reported. Each of the complexes features moderately intense emission at room temperature having a lifetime of 16.7 ns for naphthalene and 11.4 ns for anthracene, while a substantially elevated lifetime of 8.3 μs was observed for the pyrene derivative. All the three complexes display a reversible couple in the positive potential window due to Ru 2+ /Ru 3+ oxidation but multiple reversible and/or quasireversible peaks in the negative potential domain because of the reduction of the terpyridine moieties. All the complexes selectively sense F − among the studied anions via the intermediary of different noncovalent interactions. The interaction event is monitored through absorption, emission, and 1 H and 19 F NMR spectroscopy. Additionally, upon utilizing the stilbene motif, reversible trans−cis isomerization of the complexes has been undertaken upon alternate treatment of visible and UV light so that the complexes can act as potential photomolecular switches. We also carried out the anion sensing characterization of the cis form of the complexes. Theoretical calculation employing density functional theory is also executed for a selective complex (naphthalene derivative) to elucidate different noncovalent interactions that are operative during the complex− fluoride interplay.

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Section: ■ Results and Discussionmentioning

confidence: 99%

“…Other chemicals and solvents used in the present investigation were purchased from local vendors. Tpy-pvp-X (X = naphthalene, anthracene, and pyrene) ligands were prepared and characterized by our reported method . The metal complexes were prepared by using a common method, as described in the Supporting Information.…”

Section: Methodsmentioning

confidence: 99%