Results 101 to 110 of about 438,427 (238)

Infrared Irradiation‐Assisted Pd‐Catalyzed C(sp3)─H Arylation and Tandem Cyclization of Ortho‐Tolualdehydes

open access: yesChemistry – A European Journal, EarlyView.
A rapid and efficient protocol for the synthesis of 2‐benzylbenzaldehydes and anthracenes is reported, based on the infrared (IR) irradiation‐assisted Pd‐catalyzed C(sp3)─H arylation and the tandem C(sp3)─H arylation/electrophilic aromatic cyclization of ortho‐tolualdehydes with aryl iodides via a transient directing group (TGD) strategy.
Matteo Renato Martina   +6 more
wiley   +1 more source

Detecção de fumonisinas e hidrocarbonetos policíclicos aromáticos em grãos de soja (Glycine Max L.) e efeito de diferentes temperaturas de secagem [PDF]

open access: yes, 2015
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias, Programa de Pós-Graduação em Ciência dos Alimentos, Florianópolis, 2015.A soja é uma cultura produzida em um sistema de agricultura moderna, portanto baseado no
Garcia, Laura Pereira
core  

Exploring the Boundaries of Aromaticity in Complex Structures and Excited States Through Computational Analysis

open access: yesChemistry – 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

Proximal Steric Shielding Unlocks High Solid‐State Luminescence in Quinoxaline‐Fused Pyrene Heteroacenes

open access: yesChemistry – 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

A review of the hazardous effects of polycyclic aromatic hydrocarbons on living organisms

open access: yes, 2009
Polycyclic aromatic hydrocarbons (PAHs) are one of the most important, abundant and dangerous class of persistent organic contaminants found in air, water, food and waste sites.
Mazzeo, Dânia Elisa Christofoletti [UNESP]   +2 more
core   +1 more source

Biologischer Abbau von polycyclischen aromatischen Kohlenwasserstoffen

open access: yes, 1994
The report compiles the contributions to the colloquium 'Biodegradation of polycyclic aromatic hydrocarbons' held at the Technical University Berlin, November 1993.
Weigert, B. (comp.)   +1 more
core  

Biomonitoring of firefighters occupational exposure to polycyclic aromatic hydrocarbons during the 2014 hot season [PDF]

open access: yes, 2015
Human biomonitoring is an important tool in environmental medicine that is used to assess the level of internal exposure to environmental pollutants. Firefighters are one of the most exposed and least studied occupations.
Slezakova, Klara   +7 more
core  

Illuminating Olympicenes: Insights Into Anti‐Kasha Photophysics in Polycyclic Aromatic Hydrocarbons

open access: yesChemistry – 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

Regioisomerism Rewires Optical and Ion Recognition Properties in Azulenylsumanenes—Curved Non‐Alternant π‐Systems

open access: yesChemistry – 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

A novel approach to investigating indoor/outdoor pollution links : combined magnetic and PAH measurements. [PDF]

open access: yes, 2008
In a preliminary study, paired indoor and outdoor air sampling was conducted at three locations around the city of Lancaster, UK to examine the influence of combustion sources on air quality by measuring particulate concentrations, particulate magnetic ...
Karloukovski, V. V.   +4 more
core  

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