Polypyridine ligands with extended π-conjugation: highly tunable fluorophores

Leroy‐Lhez, Stéphanie; Fagès, Frédéric

doi:10.1016/j.crci.2004.11.028

Cited by 14 publications

(10 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[17][18][19][20] Their opto-electronic properties can be effectively tuned via complexation of metal cations at their chelating sites. [21,22] For example, in the case of bipyridyl derivatives, metal binding leads to a red shift in absorption and emission maxima due to the extension of the effective conjugation length provided by the planarization of the bipyridyl units. Bipyridyl derivatives are the most-employed ligands in coordination chemistry due to their robust redox stability, ease of functionalization and ability to bind a wide collection of d-and f-block elements.…”

Section: Introductionmentioning

confidence: 99%

Zn(II)-bisthienylethynylbipyridine complex: Preparation, characterization and vapochromic behaviour in polymer films

et al. 2014

View full text Add to dashboard Cite

In the present work, we report the vapochromic behaviour of PMMA films doped with small amounts of 1a:Zn fluorophore, a Zn 2+ adduct of the bisthienylethynylbipyridine ligand. 1a:Zn exhibited polarity-dependent changes in the fluorescence spectral properties when dissolved in solvents with different polarity index, indicating that its fluorescence states are of intramolecular charge transfer character. When 1a:Zn was dispersed in the PMMA matrix, its emission resulted barely influenced by the polymer environment. By contrast, 1a:Zn/PMMA films showed a significant variation of its emission with a 40 nm red-shift when exposed to a saturated atmosphere of dichloromethane. This vapochromic behaviour was much less evident when progressive amounts of methanol were added to dichloromethane due to both lower vapour pressure and limited interaction of the former with PMMA. The experiments revealed also that the rate constants associated with the vapochromic behaviour were affected by solvent composition and easily determined by luminescent experiments.

show abstract

Section: Introductionmentioning

confidence: 99%

Zn(II)-bisthienylethynylbipyridine complex: Preparation, characterization and vapochromic behaviour in polymer films

et al. 2014

View full text Add to dashboard Cite

show abstract

“…[ 21 , 22 ] Due to the dynamic nature of the systems and to the high emission quantum yield in the blue region, zinc bis(phenylterpyridine) derivatives [ 23 , 24 ] have attracted the attention in the material-science field. Two recent reviews on polypyridyl systems in conjunction with aromatic units [ 25 ] and with respect to molecular wires [ 26 ] are available.…”

Section: Introductionmentioning

confidence: 99%

Metal Ion Enhanced Charge Transfer in a Terpyridine-bis-Pyrene System

D’Aléo

Cecchetto

Cola

et al. 2009

Sensors

View full text Add to dashboard Cite

The synthesis, electrochemical and photophysical properties of a branched molecule 3,5-bis(pyrene-1-yl)-4′-phenyl-2,2′:6′,2″-terpyridine are reported. Spectroscopy in different solvents reveals that an optical electron transfer from the pyrene donor to the terpyridyl electron acceptor can occur in polar media, as the system displays both charge transfer (CT) absorption and CT emission. Furthermore, the study of the zinc complex as well as the bis-protonated form shows an enhancement of the electron transfer character of the system, by an increase of the acceptor strength. This is accompanied by a large increase of the non-radiative processes. With sub-nanosecond transient absorption spectroscopy, the CT state, consisting of the pyrene radical cation and the terpyridine radical anion, has been detected. At room temperature, the study of the nanosecond transient absorption spectra reveals the formation of a low-lying triplet excited state that we attribute to the pyrene moiety through which the CT state decays. At 77K, the absence of the terpyridine triplet emission also suggests the population of a low-lying triplet state of the pyrene unit.

show abstract

“…A recent review on the fluorescence of phen complexes shows that without a strong electron-donating substituent on the aromatic ring, all the emission maxima are at a wavelength lower than 500 nm with a single emission maximum [45].…”

Section: Structure Of [Ni 3 (Phen) 3 (Bptc) 15 (H 2 O) 5 ] á 4h 2 O (3)mentioning

confidence: 99%

Monomeric and polymeric structures derived from 3,3′,4,4′-biphenyltetracarboxylic acid, phenanthroline and metal ions

Zhu

Zhang

Shao

et al. 2008

Transition Met Chem

View full text Add to dashboard Cite

show abstract

Polypyridine ligands with extended π-conjugation: highly tunable fluorophores

Cited by 14 publications

References 61 publications

Zn(II)-bisthienylethynylbipyridine complex: Preparation, characterization and vapochromic behaviour in polymer films

Zn(II)-bisthienylethynylbipyridine complex: Preparation, characterization and vapochromic behaviour in polymer films

Metal Ion Enhanced Charge Transfer in a Terpyridine-bis-Pyrene System

Monomeric and polymeric structures derived from 3,3′,4,4′-biphenyltetracarboxylic acid, phenanthroline and metal ions

Contact Info

Product

Resources

About