Results 81 to 90 of about 64,520 (291)

Surface photochemistry: Photodegradation study of pyrene adsorbed onto microcrystalline cellulose and silica

International Journal of Photoenergy, 2004
Ground-state diffuse reflectance, time resolved laser-induced luminescence, diffuse reflectance laser flash-photolysis transient absorption and chromatographic techniques were used to elucidate the photodegradation processes of pyrene adsorbed onto ...
A. S. Oliveira, L. F. Vieira Ferreira, J. P. Da Silva, J. C. Moreira   +3 more
doaj   +1 more source

Pyrene-Fullerene C60 Dyads as Light-Harvesting Antennas

Molecules, 2013
A series of pyrene-fullerene C60 dyads bearing pyrene units (PyFC12, PyFPy, Py2FC12 and PyFN) were synthesized and characterized. Their optical properties were studied by absorption and fluorescence spectroscopies. Dyads were designed in this way because
Gerardo Zaragoza-Galán, Jesús Ortíz-Palacios, Bianca X. Valderrama, Alejandro A. Camacho-Dávila, David Chávez-Flores, Víctor H. Ramos-Sánchez, Ernesto Rivera   +6 more
doaj   +1 more source

Pyrene-cored blue-light emitting [4]helicenes: synthesis, crystal structures, and photophysical properties [PDF]

, 2013
The synthesis, crystal structures and photophysical properties of two types of pyrene-cored blue-light emitting [4]helicenes are reported, in which two naphthalene rings of condensed pyrenes were constructed resulting in helical architectures.
Matsumoto, Taisuke, Mark Elsegood (1249893), Junji Tanaka (480075), Jian-Yong Hu (1490389), Elsegood, Mark R.J., Hu, Jian Yong, Seto, Nobuyuki, Yamato, Takehiko, Taisuke Matsumoto (1528420), Takehiko Yamato (554434), Feng, Xing, Era, Masanao, Tanaka, Junji, Masanao Era (7163468), Redshaw, Carl, Arjun Paudel (7163465), Carl Redshaw (690980), Nobuyuki Seto (2020846), Xing Feng (715316), Paudel, Arjun   +19 more
core   +1 more source

Nickel‐Free Synthesis of Poly(pyrene‐4,5,9,10‐tetraone) for Sodium‐based Batteries: Insights into Electrode Architecture and Reversible Na‐ion Insertion

Advanced Energy Materials, EarlyView.
A nickel‐free and practical synthesis strategy to poly(pyrene tetraone) and its integration with a percolated CNTs/Ketjen Black network enables stable cycling and efficient energy storage in a sodium‐based batteries. This work demonstrates how controlling polymer structure and electrode architecture improves ion transport and mitigates dissolution in ...
Md. Adil, Robin Wessling, Nico Kokott, Elena Mena‐Osteritz, Benedikt Prifling, Markus Osenberg, Thomas Diemant, Volker Schmidt, Ingo Manke, Birgit Esser   +9 more
wiley   +1 more source

The Effects and Toxicity of Different Pyrene Concentrations on Escherichia coli Using Transcriptomic Analysis

Microorganisms
Pyrene is a pollutant in the environment and affects the health of living organisms. It is important to understand microbial-mediated pyrene resistance and the related molecular mechanisms due to its toxicity and biodegradability.
Han Zhu, Linfeng Gong, Ruicheng Wang, Zongze Shao   +3 more
doaj   +1 more source

Single/joint effects of pyrene and heavy metals in contaminated soils on the growth and physiological response of maize (Zea mays L.)

Frontiers in Plant Science
The widespread presence of polycyclic aromatic hydrocarbons (PAHs) and toxic heavy metals in soils is having harmful effects on food crops and the environment. However, the defense mechanisms and capacity of plants to counteract these substances have not
Yuhui Wang, Muhammad A. Imran, Muhammad A. Imran, Juanjuan Zhao, Muhammad Sultan, Manjie Li, Manjie Li   +6 more
doaj   +1 more source

Auf dem Weg zu chromoselektiven Transformationen in biologischen Systemen: Perspektiven und Herausforderungen

Angewandte Chemie, EarlyView.
Die Kontrolle biologischer Systeme mit organischen Chromophoren hat sich zu einer vielversprechenden Strategie entwickelt und findet Anwendung von der chemischen Biologie bis hin zur Medizin. Die Komplexität von In‐vivo‐Systemen lässt sich jedoch nicht mit nur einer einzigen Lichtwellenlänge adäquat abbilden.
Nadja A. Simeth
wiley   +1 more source

Syntheses of Pyrene-4,5-dione and Pyrene-4,5,9,10-tetraone

The Journal of Organic Chemistry
Improved gram scale synthesis procedures for the preparation of pyrene-4,5-dione and pyrene-4,5,9,10-tetraone are reported. Pyrene-4,5-dione has been synthesized using potassium persulfate as the oxidant and RuO2·nH2O as the catalyst in the biphasic CH2Cl2/H2O solvent mixture containing K2CO3 as the base.
Omolola Balogun, Besan Khader, Tetyana Ignatova, Aleksandrs Prokofjevs   +3 more
openaire   +3 more sources

Ein reversibler 900‐nm‐Nahinfrarot‐Photoschalter für unsichtbar lichtbeschreibbare 2D‐ und 3D‐Displays

Angewandte Chemie, EarlyView.
Der peri‐benzo[a]fluoranthenthioindigo (PBFT) Photoschalter kann direkt durch Nahinfrarot‐Licht mit Wellenlängen bis zu 900 nm angeregt werden. Er bietet ein hochperformantes Eigenschaftsprofil mit kontrastreichen Farbänderungen zwischen blassgrün und tiefblau.
Elias Ciekalski, Henry Dube
wiley   +1 more source

Structure Analysis and Luminescence Properties of Octaethyl(pyrene-tetrakis(biphenyl))tetrakis(phosphonate)

Crystals
We present a modular building block strategy for synthesizing phosphonated polyaromatic systems as an alternative to the conventional late-stage phosphonation of prefabricated aromatic scaffolds, which often requires harsh conditions and has limited ...
Aysenur Limon, Marcus N. A. Fetzer, Christoph Janiak   +2 more
doaj   +1 more source