Bidentate Ligands That Contain Pyrrole in Place of Pyridine

Wu, Feiyue; Chamchoumis, Charles; Thummel, Randolph P.

doi:10.1021/ic990445s

Cited by 35 publications

(28 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PQ was synthesized and purified by Matthew Kanan using standard techniques. 30 The homo-dimer solutions were prepared by dissolving 100 µmol in 0.4 mL CCl 4 giving a formal monomer concentration of 0.25 M. The hetero-dimer solutions were prepared by adding ~0.95 equivalent glacial acetic acid to the corresponding homo-dimer solution. Sub-equilibrium amounts of the acids were used to bias against homo-dimer formation of the acid.…”

Section: Methodsmentioning

confidence: 99%

Ultrafast N−H Vibrational Dynamics of Cyclic Doubly Hydrogen-Bonded Homo- and Heterodimers

et al. 2008

View full text Add to dashboard Cite

Hydrogen-bonded interfaces are essential structural elements in biology. Furthermore they can mediate electron transport by coupling the electron to proton transfer within the interface. The specific hydrogen-bonding configuration and strength have a large impact on the proton transfer, which exchanges the hydrogen bonded donor and acceptor species (i.e. NH---O → N---HO. Modulations of the hydrogen-bonding environment, such as the hydrogen-bond stretch and twist modes, affect the proton transfer dynamics. Here we present transient grating and echo peak shift measurements of the NH stretch vibrations of four doubly hydrogen-bonded cyclic dimers in their electronic ground state. The equilibrium vibrational dynamics exhibit strong coherent modulations that we attribute to coupling of the high-frequency NH vibration to the low frequency inter-dimer stretch and twist modes and not to interference between multiple Fermi-resonances that dominate the substructure of the linear spectra.

show abstract

Section: Methodsmentioning

confidence: 99%

Ultrafast N−H Vibrational Dynamics of Cyclic Doubly Hydrogen-Bonded Homo- and Heterodimers

et al. 2008

View full text Add to dashboard Cite

show abstract

“…30 The product obtained was purified by preparative thin layer chromatography. 30 The product obtained was purified by preparative thin layer chromatography.…”

Section: Dmapip-cmentioning

confidence: 99%

Relay proton transfer triggered twisted intramolecular charge transfer

Behera

Krishnamoorthy

2015

Photochem Photobiol Sci

View full text Add to dashboard Cite

The mechanism for the dual emission of 2-(4'-N,N-dimethylaminophenyl)imidazo[4,5-c]pyridine (DMAPIP-c) in protic solvents was investigated by synthesizing and studying its analogues. Theoretical calculations were carried out to corroborate the experimental findings. The deprotonation studies suggest that the enhancement in the TICT emission of anionic forms of DMAPIP-c is limited to a protic environment. The spectral characteristics of DMAPIP-c were also studied in a methanol-acetonitrile binary solvent mixture. Unlike DMAPIP-c, the methyl derivatives do not emit dual fluorescence in protic solvents. The relative intensity of the TICT emission (with respect to that of normal emission) rises with the methanol amount in the acetonitrile-methanol binary solvent mixture. The studies also show that a 1:3 hydrogen bonded complex is formed between DMAPIP-c and methanol and it is responsible for the TICT emission. Based on the results a relay proton transfer tiggered TICT emission is proposed. TDDFT calculations were performed to predict the emission energies.

show abstract

“…The study was carried out in comparison with the conventional chemical ring-contraction procedure extensively used by Boger (Zn/AcOH in acidic medium). [10,11] The interest of the synthesis of such a substituted dipyridinylpyrrole sequence is highlighted by a variety of applications of biological interest, [12,13] or as potent anionic complex agents with organometals, [14] or as cationic ligands when linked to amidinium or guanidinium salts to allow interaction with DNA or RNA sequences. [15,16] …”

Section: Introductionmentioning

confidence: 99%

Functionalized 2,5‐Dipyridinylpyrroles by Electrochemical Reduction of 3,6‐Dipyridinylpyridazine Precursors

Bakkali¹,

Marie²,

Ly³

et al. 2008

Eur J Org Chem

View full text Add to dashboard Cite

The ring contraction of pyridinylpyridazine derivatives into the corresponding pyrroles by electrochemical reduction was studied, and the influence of the substituents of the pyridazine precursors on the process is discussed. Cyclic voltammetry studies underlines the electron-withdrawing or -donating effect of the substituent on the pyridazine ring, which determines the reaction pathway of their preparative electrolysis. The ring-contraction process, with extrusion of nitrogen, proceeds by two subsequent two-electron, two-proton

show abstract

Bidentate Ligands That Contain Pyrrole in Place of Pyridine

Cited by 35 publications

References 35 publications

Ultrafast N−H Vibrational Dynamics of Cyclic Doubly Hydrogen-Bonded Homo- and Heterodimers

Ultrafast N−H Vibrational Dynamics of Cyclic Doubly Hydrogen-Bonded Homo- and Heterodimers

Relay proton transfer triggered twisted intramolecular charge transfer

Functionalized 2,5‐Dipyridinylpyrroles by Electrochemical Reduction of 3,6‐Dipyridinylpyridazine Precursors

Contact Info

Product

Resources

About