Results 61 to 70 of about 16,341 (199)

Optical Probes of the Quantum-Entangled Triplet-Triplet State in a Heteroacene Dimer

, 2018
The nature and extent of the spin-entanglement in the triplet-triplet biexciton with total spin zero in correlated-electron $\pi$-conjugated systems continues to be an enigma.
Khan, Souratosh, Mazumdar, Sumit
core   +1 more source

Polyene-Based Derivatives with Antifungal Activities

Pharmaceutics
Polyenes are a class of organic compounds well known for their potent antifungal properties. They are effective due to their ability to target and disrupt fungal cell membranes by binding to ergosterol and forming pores.
Kwanele Ngece, Thabisa L. Ntondini, Vuyolwethu Khwaza, Athandwe M. Paca, Blessing A. Aderibigbe   +4 more
doaj   +1 more source

Fotofísica de carotenóides e o papel antioxidante de b-caroteno Photophysics of carotenoids and the antioxidant role of b-carotene

Química Nova, 1997
Carotenoid polyenes play a wide role in nature and their photophysical properties make of these pigments a focus of research in photochemistry, photobiology and photomedicine.
Sergio Luis Cardoso
doaj   +1 more source

Membrane Transport Inhibition as Mode of Action of Polyene Antimycotics: Recent Data Supported by Old Ones

Food Technology and Biotechnology, 2014
Recent studies demonstrate that the actual interactions of polyenes with membrane sterols are the basis for their antimycotic toxicity and not, as previously assumed, their potential to form pores.
Miroslava Opekarová, Widmar Tanner
doaj  

Recent Progress in Iridium-Catalyzed Enantioselective Hydrogenation: Tetrasubstituted Olefins and Polyenes

CHIMIA, 2008
Iridium-catalyzed enantioselective hydrogenation has become the method of choice to convert prochiral unfunctionalized olefins to optically active compounds.
Marcus G. Schrems, Aie Wang, Andreas Pfaltz   +2 more
doaj   +1 more source

Exact Wave Packet Dynamics of Singlet Fission in Unsubstituted and Substituted Polyene Chains within Long-Range Interacting Models

, 2017
Singlet fission (SF) is a potential pathway for significant enhancement of efficiency in organic solar cells (OSC). In this paper, we study singlet fission in a pair of polyene molecules in two different stacking arrangements employing exact many-body ...
Prodhan, Suryoday, Ramasesha, S.
core   +1 more source

Electron correlation induced transverse delocalization and longitudinal confinement in excited states of phenyl-substituted polyacetylenes

, 2000
Electron-electron interactions in general lead to both ground state and excited state confinement. We show, however, that in phenyl-substituted polyacetylenes electron-electron interactions cause enhanced delocalization of quasiparticles in the optically
Ghosh, Haranath, Mazumdar, Sumit, Shukla, Alok   +2 more
core   +1 more source

A structural bridge between alternant and non-alternant hydrocarbons

Química Nova, 2001
A simple set of trimethylene-substituted even, fully-pi-bonded, non-alternant monocycles is shown to have several key features in common with acyclic, even alternant polyenes at the Hückel level.
Richard Francis Langler
doaj   +1 more source

Monosaccharides and Analogues from Simple Achiral Unsaturated Compounds

CHIMIA, 2011
We present herein a selection of ingenious methods that have been developed to convert inexpensive furan, pyrrole and unsaturated hydrocarbons into enantiomerically enriched monosaccharides and analogues of biological interest.
Antonio J. Moreno-Vargas, Ana T. Carmona, Elena Moreno-Clavijo, Inmaculada Robina   +3 more
doaj   +1 more source

The polyene macrolide antibiotics [PDF]

Postgraduate Medical Journal, 1979
Summary The mode of action of the polyene antibiotics is reviewed together with the effect of genetic and environmental factors on sensitive organisms. The future prospects of polyenes in the treatment of systemic mycoses are considered.
openaire   +2 more sources