Charge-localized naphthalene-bridged bis-hydrazine radical cations

Journal of the American Chemical Society
Stephen F NelsenY Teki

Abstract

Electron transfer (ET) in four symmetrically substituted naphthalene-bridged bis-hydrazine radical cations (1,4; 1,5; 2,6; and 2,7) is compared within the Marcus-Hush framework. The ET rate constants (k(ET)) for three of the compounds were measured by ESR; the 2,7-substituted compound has an intramolecular ET that is too slow to measure by this method. The k(ET) values are significantly dependent upon the substitution pattern of the hydrazine units on the naphthalene bridge but do not correlate with the distance between them. This is contrary to an assumption that is frequently made about intervalence compounds that the bridge serves only as a spacer that fixes the distance between the charge-bearing units. The internal vibrational and solvent portions (lambda(v) and lambda(s)) of the total reorganization energy (lambda) have been separated using solvent effects on the intervalence band maximum, resulting in a lambda(v) that is the same, 9900 cm(-1), for the differently substituted naphthalenes. This is in accord with the general assumption that lambda(v) is primarily dependent upon the charge bearing unit and not the bridge. However, the trends in lambda(s) cannot be explained by dielectric continuum theory.

References

Jun 14, 2001·Journal of the American Chemical Society·S F NelsenY Teki
Oct 2, 2001·The Journal of Organic Chemistry·S F Nelsen, F Blomgren
Dec 8, 2005·The Journal of Physical Chemistry. a·Stephen F NelsenJeffrey I Zink

❮ Previous
Next ❯

Citations

May 18, 2011·Chemical Reviews·Jihane Hankache, Oliver S Wenger
Oct 17, 2009·Journal of the American Chemical Society·Manuel RenzMartin Kaupp
Sep 2, 2011·Physical Chemistry Chemical Physics : PCCP·Martin KauppChristoph Lambert
Dec 30, 2015·The Journal of Organic Chemistry·Hauke C SchmidtOliver S Wenger
Jul 10, 2018·Angewandte Chemie·Hauke C SchmidtOliver S Wenger
Sep 14, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Andrea PreußHeinrich Lang
Nov 19, 2011·Angewandte Chemie·Alexander Heckmann, Christoph Lambert
Sep 25, 2008·The Journal of Physical Chemistry. a·J SeibtV Engel
May 15, 2007·Journal of the American Chemical Society·Stephen F NelsenJoão P Telo
Apr 21, 2009·The Journal of Physical Chemistry. a·Stephen F Nelsen, Kevin P Schultz
Dec 21, 2006·Journal of the American Chemical Society·Jenny V LockardStephen F Nelsen
Jun 5, 2007·The Journal of Physical Chemistry. a·Xianghuai WangJeffrey I Zink
Mar 29, 2007·The Journal of Physical Chemistry. B·Stephen F NelsenYi Zhao

❮ Previous
Next ❯

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.