Results 161 to 170 of about 19,264 (282)

1,1‐and 1,2‐Diborylalkenes: Preparation and Synthetic Applications

Advanced Synthesis &Catalysis, Volume 368, Issue 12, 17 June 2026.
In this review, we highlight recent advances in the synthesis and reactivity of 1,1‐diborylalkenes and 1,2‐diborylalkenes, along with various transformations leading to C‐C, C‐heteroatom, and multicomponent products. By providing a comprehensive and practical resource, this review aims to assist researchers in exploring the synthetic utility of 1,1 and
Jayaram Vankudoth, Maruti Mali, Fabienne Berrée   +2 more
wiley   +1 more source

Pd‐Catalyzed Cyclotrimerization and Cycloaddition of 5,6‐Didehydrobenzo[8]annulenes (BenzoCOTynes): Formation of Nonplanar Tri[8]annulenes and Diels–Alder Cycloadducts

European Journal of Organic Chemistry, Volume 29, Issue 23, 16 June 2026.
A Pd(0)‐catalyzed cyclotrimerization of benzoCOTynes to form tri(benzo[8]annulenes) was developed. Three distinct isomers were isolated and structurally characterized by single‐crystal X‐ray diffraction. Ligand modulation proved crucial for enhancing regioselectivity: P(4‐OMePh), and (S)‐tBu‐Phox promoted the formation of the symmetric isomers.
Jesús Bello‐García, Jesús A. Varela, Carlos Saá   +2 more
wiley   +1 more source

Interplay of Orbital Overlap and Exciton Coupling in the Optical Properties of Adamantylethynyl‐Substituted Pyrene Molecular Crystals

Chemistry – A European Journal, Volume 32, Issue 22, 9 June 2026.
Sterically shielded adamantylethynyl‐substituted pyrenes form quasi‐one‐dimensional π‐stacks that enable direct quantification of solution‐to‐crystal spectral shifts. The optical response is dominated by band dispersion arising from frontier crystal orbitals, while excitonic contributions are secondary.
Benedikt Herbert, Kazutaka Shoyama
wiley   +1 more source

Source analysis and health risk assessment of polycyclic aromatic hydrocarbon (PAHs) in total suspended particulate matter (TSP) from Bengbu, China. [PDF]

Sci Rep
Wu D, Chen L, Ma Z, Zhou D, Fu L, Liu M, Zhang T, Yang J, Zhen Q.   +8 more
europepmc   +1 more source

Energy sources of polycyclic aromatic hydrocarbons. [Carcinogenicity of PAHs]

, 1977
Combustion is the predominant end-process by which fossil fuels are converted to energy. Combustion, particularly when inefficient, is also the primary technological source of polycyclic aromatic hydrocarbons (PAHs) released into the environment.
Guerin, M. R.
core  

Impact of ultraviolet filters and polycyclic aromatic hydrocarbon from recreational activities on water reservoirs in southeast Queensland Australia

Water reservoirs and lakes are gaining popularity for recreation activities as populations increase and green spaces become in high demand. However, these activities may cause contamination to critical water resources.
Veal, Cameron, O'Malley, Elissa, Bartkow, Michael, Sturm, Katrin, Kaserzon, Sarit, Verhagen, Rory, Gallen, Michael   +6 more
core   +1 more source

In Silico Analysis of Polycyclic Aromatic Hydrocarbon (PAH) Degrader from <i>Bordetella petrii</i> Strain P003 Isolated from Contaminated Oil of Kuwait. [PDF]

Curr Issues Mol Biol
Akbar A, Rahmeh R, Kishk M, Shajan A.
europepmc   +1 more source

Structure–Reactivity Relationship of β‐O‐4 Linkers in Lignin Model Compound Catalytic Pyrolysis

Advanced Energy and Sustainability Research, Volume 7, Issue 6, June 2026.
Acid‐catalyzed pyrolysis of lignin model dimers reveals that retro‐ene and Maccoll elimination pathways compete with dehydration reactions, depending on the substituent at the β‐O‐4 linkage. We unveil these reaction mechanisms utilizing photoionization mass spectrometry with VUV synchrotron radiation.
Max Jueckstock, Yang Shen, Xintong Xiao, Hao Ma, Chen Huang, Jovanni Cabana, Zhao Long, Chengyuan Liu, Yang Pan, Zhongyue Zhou, Patrick Hemberger   +10 more
wiley   +1 more source

Exogenous NADH enhances polycyclic aromatic hydrocarbon degradation in <i>Novosphingobium pentaromativorans</i> US6-1 by boosting energy metabolism and reducing oxidative stress. [PDF]

Appl Environ Microbiol
Meng Q, Lv F, Huang J, Chen H, Cao F, Yu Z.   +5 more
europepmc   +1 more source

Electronic Smoking Devices Among University Students: Usage Patterns and Chemical Composition of Inhaled Substances

Analytical Science Advances, Volume 7, Issue 1, June 2026.
ABSTRACT This study investigated the prevalence of electronic smoking device (ESD) use and its associated behavioural and chemical risks among university students in Bahia, Brazil. A cross‐sectional survey was conducted with 355 students from public and private institutions through an online questionnaire between April and May 2023. Among participants,
Eduard F. Valenzuela, Raffael Silva Santos Almeida, Ivana Ferreira Simões, Aline Gonçalves Miranda, Magno Oliveira Ramos, Roberto Rodrigues Bandeira Tosta Maciel, Fernanda Warken Rosa, Aníbal de Freitas Santos Júnior   +7 more
wiley   +1 more source