Results 141 to 150 of about 168,306 (334)
Post‐Modification of Tripyrenylenes to Enantiopure π‐Extended D3‐Symmetric Propellers
Chemistry – A European Journal, EarlyView.The post‐modification of tripyrenylenes to π‐extended enantiopure propellers with tris‐phenanthrophenazines is presented and the chiroptical properties as well as the solid‐state packings investigated in comparison to the corresponding racemic mixtures.
Dennis Popp +8 more
wiley +1 more source
Chemistry – A European Journal, EarlyView.Understanding aromaticity has evolved from benzene‐centric concepts to a broad multidimensional framework spanning organic, inorganic, and excited‐state systems. This review highlights ambiguities between magnetic, electronic, geometric, and energetic descriptors, emphasizing the need for unified, multi‐criteria approaches.
Sílvia Escayola +2 more
wiley +1 more source
Polycyclic aromatic hydrocarbons (PAHs) [PDF]
How to use this course -- Initial check -- What are polycyclic aromatic hydrocarbons (PAHs)? -- Where are polycyclic aromatic hydrocarbons (PAHs) found? -- What are the routes of exposure for polycyclic aromatic hydrocarbons (PAHs)?
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Chemistry – A European Journal, EarlyView.Proximal steric tuning of quinoxaline‐fused pyrene heteroacenes enables soluble derivatives that exhibit solid‐state photoluminescence quantum yields (PLQYs) up to 82%, surpassing previous benchmarks. This work reveals key structure–property relationships for next‐generation, processable organic emitters in advanced optoelectronic applications ...
Rafiq Ahamed +9 more
wiley +1 more source
EXPOSURE ASSESSMENT OF PRIORITY PAHS FOR EMPLOYEES OF ENTERPRISES
RUDN Journal of Ecology and Life Safety, 2015 Priority PAHs concentrations in the ambient air, working zone air and food products were measured by the mean of mass spectrometry. Data on the content of PAHs including benz(a)pyrene were used for exposure assessment of priority PAHs for employees of ...
E A Belinskaya +4 more
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Illuminating Olympicenes: Insights Into Anti‐Kasha Photophysics in Polycyclic Aromatic Hydrocarbons
Chemistry – A European Journal, EarlyView.Compact olympicene‐based chromophores reveal unexpectedly rich excited‐state behavior, including dual fluorescence, excitation‐dependent emission, and anti‐Kasha‐type emission. Tunable locally excited and intramolecular charge‐transfer states emerge from subtle structural changes, expanding the design rules for polycyclic aromatic chromophores and ...
Wenlong Li +5 more
wiley +1 more source
Chemistry – A European Journal, EarlyView.Regioisomerism rewires orbital topology and electronic polarity in curved non‐alternant π‐systems, switching both optical response and alkali metal ion recognition from Na+ to Rb+ selectivity. ABSTRACT Herein, we explore the fundamental concept of combining the molecular curvature of a molecular fragment of buckminsterfullerene with the pronounced ...
Jakub Cyniak +4 more
wiley +1 more source
Exposure to polycyclic aromatic hydrocarbons (PAHs) has been associated with adverse health outcomes. Concentrations of urinary PAH metabolites (OH-PAHs) provide an integrated measure of human exposure to PAHs but measurement of urinary OH-PAHs has not ...
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