We report the crystallography, emission spectra, femtosecond pump-probe spectroscopy, and density functional theory computations for a series of ruthenium complexes that comprise a new class of chelating triphenylphosphine based ligands with an appended sulfoxide moiety. These ligands differ only in the presence of the para-substitutent (e.g., H, OCH, CF). The results show a dramatic range in photoisomerization reactivity that is ascribed to differences in the electron density of the phosphine ligand donated to the ruthenium and the nature of the excited state.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/jacs.8b05957 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Photoisomerization Paths of α,ω-Diphenylpolyenes: Reaction Rate Dependence on Temperature, Excitation Wavelength, and Deuteration.
J Am Chem Soc
November 2024
Department of Chemistry, Humboldt University of Berlin, Berlin 12489, Germany.
The photoisomerization rate of -stilbene (tS) and trans-trans-diphenylbutadiene (ttD) is studied in solution and compared to that in jet/gas. Rice-Ramsperger-Kassel-Marcus (RRKM) theory correctly predicts the tS rate in jet, = exp(-/) with = 1398 cm, and = 1.8 ps corresponding to frequency ν = 60 cm of the reactive mode, being the molecular temperature.
View Article and Find Full Text PDFLight-Activated Reactivity of Nitrones with Amino Acids and Proteins.
Angew Chem Int Ed Engl
January 2025
Department of Chemistry, University of California, Berkeley, Berkeley, CA-94720, USA.
Controlled modifications of amino acids are an indispensable tool for advancing fundamental and translational research based on peptides and proteins. Yet, we still lack methods to chemically modify each naturally occurring amino acid sidechain. To help address this gap, we show that N,α-diaryl oxaziridines expand the scope of bioconjugation methods to chemically modify cysteine, methionine, and tryptophan residues with evidence for additional tyrosine labelling in a proteomic context.
View Article and Find Full Text PDFAllergic potential & molecular mechanism of skin sensitization of cinnamaldehyde under environmental UVB exposure.
Chemosphere
November 2024
Photobiology Laboratory, Drug and Chemical Toxicology Group, FEST Division, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan 31, Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, Uttar Pradesh, India. Electronic address:
Fragrance, a key ingredient in cosmetics, often triggers skin allergy causes rashes, itching, dryness, and cracked or scaly skin. Cinnamaldehyde (CA), derived from the bark of the cinnamon tree, used as a fragrance and is a moderate skin sensitizer. CA exhibits strong UVB absorption, its allergic potential and the molecular mechanisms underlying skin sensitization under UVB exposure remain largely unexplored.
View Article and Find Full Text PDFPhotoisomerization pathways of -resveratrol.
Phys Chem Chem Phys
September 2024
Aix Marseille University, CNRS, ICR, Marseille, France.
Resveratrol is well-known for promoting health benefits due to its antioxidant, anti-aging, anti-carcinogenic, and other beneficial activities. Understanding the photophysics of resveratrol is essential for determining its applicability to pharmaceutical innovations. In the present work, we used an explore-then-assess strategy to map the internal conversion pathways of -resveratrol.
View Article and Find Full Text PDFPrediction and Rationalization of Different Photochemical Behaviors of - and -Isomers of [Ru(pyridyltriazole)].
Inorg Chem
September 2024
Department of Physical and Life Sciences & Centre for Functional Materials, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, U.K.
Facial and meridional isomerism of metal complexes is known to result in fundamental differences in photophysical properties. One may also envisage differences in their photochemical reactivity and therefore predict different outcomes of their light-triggered transformations. The - and -isomers of the complex [Ru(pytz)] (- & -, pytz = 1-benzyl-4-(pyrid-2-yl)-1,2,3-triazole) were separated and isolated.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!