Results 61 to 70 of about 24,760 (225)

Understanding/unravelling carotenoid excited singlet states. [PDF]

, 2018
Carotenoids are essential light-harvesting pigments in natural photosynthesis. They absorb in the blue–green region of the solar spectrum and transfer the absorbed energy to (bacterio-)chlorophylls, and thus expand the wavelength range of light that is ...
Alastair T. Gardiner, Britton G, Britton G, Britton G, Chiasa Uragami, Frank HA, Hashimoto H, Hashimoto H, Hideki Hashimoto, Kasama A, Koyama Y, Koyama Y, Krinsky NI, Mukamel S, Nao Yukihira, Pfander H, Richard J. Cogdell   +16 more
core   +1 more source

Unlocking the Functionalization and Reactivity of Ethylene Bridges in [2.2]Paracyclophanes: Strategies and Challenges

European Journal of Organic Chemistry, EarlyView.
Bridging the gap. Beyond deck functionalization, the ethylene bridges of [2.2]paracyclophanes offer a largely unexploited reactivity landscape. This review showcases strategies to functionalize these bridges and leverage them to build novel cyclophane architectures.
Rongyu Sun, Tamara Ye, Laurent Micouin, Erica Benedetti   +3 more
wiley   +1 more source

Synthetic Studies of Enacyloxins: A Series of Antibiotics Isolated from sp. W-315: C1′-C8′ and C9′-C15′ Fragments

Natural Product Communications, 2015
Synthetic studies of enacyloxins (ENXs), a series of yellow-colored, polyene-polyol antibiotics produced by Frateuria sp. W-315, are described. The C1′-C8′ polyene fragments were prepared using successive Wittig reactions.
Aki Saito, Wataru Igarashi, Hiroyuki Furukawa, Hiroki Hoshikawa, Teiko Yamada, Shigefumi Kuwahara, Hiromasa Kiyota   +6 more
doaj   +1 more source

Catalytic enantioselective synthesis of quaternary carbon stereocentres. [PDF]

, 2014
Quaternary carbon stereocentres-carbon atoms to which four distinct carbon substituents are attached-are common features of molecules found in nature. However, before recent advances in chemical catalysis, there were few methods of constructing single ...
Overman, Larry E, Quasdorf, Kyle W
core  

Electron correlation effects and two-photon absorption in diamond shaped graphene quantum dots

, 2018
In quasi-1D $\pi$-conjugated polymers such as \emph{trans}-polyacetylene and polyenes, electron correlation effects determine the "reversed" excited state ordering in which the lowest two-photon $2A_{g}$ state lies below the lowest one-photon $1B_{u ...
Basak, Tista, Basak, Tushima, Shukla, Alok   +2 more
core   +1 more source

Curvature and Microenvironment Regulation Enable Robust Seawater Electrochemical Hydrogen Peroxide Synthesis for On‐Site Marine Aquaculture

Interdisciplinary Materials, EarlyView.
This work designs pentagon‐defect‐enriched interconnected spherical carbon (PD/IS‐C) via curvature and microenvironment co‐engineering for seawater H2O2 electrosynthesis. Curvature modulates electronic structure to boost reactivity, while local alkaline microenvironment repels Cl− for enhanced stability, endowing PD/IS‐C with exceptional catalytic ...
Chang Zhang, Chunliang He, Huiyao Qi, Lilong Zhang, Hongshang Hu, Houfeng Zhang, Tonghui Zhao, Muneerah Alomar, Lipiao Bao, Huiying Yang, Jian Zhang, Xing Lu   +11 more
wiley   +1 more source

Phenotypic and Molecular Characterization of Naganishia uzbekistanensis: Diagnostic Challenges and Antifungal Resistance Profile

Journal of Clinical Laboratory Analysis, EarlyView.
The graphical abstract summarizes the laboratory characterization of Naganishia uzbekistanensis strain CY11558. The isolate shows distinct colony morphology, globular yeast cells with a fibrillar surface network under scanning electron microscopy, and a weakly positive cryptococcal antigen reaction.
Xin Fan, Xinfei Chen, Jin Li, Rongchen Dai, Pengjie Hu, Li Gu, Meng Xiao, Xiaomin Yu   +7 more
wiley   +1 more source

Biosynthetic mechanism for sunscreens of the biocontrol agent Lysobacter enzymogenes. [PDF]

PLoS ONE, 2013
Lysobacter are ubiquitous environmental bacteria emerging as novel biocontrol agents and new sources of anti-infectives. So far, very little effort has been invested in the study of the biology of these Gram-negative gliding bacteria.
Yan Wang, Guoliang Qian, Yaoyao Li, Yansheng Wang, Yulan Wang, Stephen Wright, Yuezhong Li, Yuemao Shen, Fengquan Liu, Liangcheng Du   +9 more
doaj   +1 more source

Electrospun conducting polymers: recent trends and the transition towards a sustainable future

Polymer International, EarlyView.
This review discusses the electrospinning of conducting polymers, detailing procedures, fibrous morphologies, improved properties, applications in electronics, and challenges, while outlining future directions for nanofibre‐based devices in various fields.
Xenofon Karagiorgis, Sofia Sandhu, Peter J. Skabara, Ravinder Dahiya   +3 more
wiley   +1 more source

A simplified picture for Pi electrons in conjugated polymers : from PPP Hamiltonian to an effective molecular crystal approach

, 1998
An excitonic method proper to study conjugated oligomers and polymers is described and its applicability tested on the ground state and first excited states of trans-polyacetylene, taken as a model.
Baeriswyl D, J-L Fave, Longuet-Higgins H C, Ohmine I, Pople J A, S Pleutin, Simpson W T   +6 more
core   +1 more source