Results 121 to 130 of about 31,710 (279)

Photo-controlled permeation of spiropyran modified gramicidin A ion channel [PDF]

, 2006
Thesis (M.S.) University of Alaska Fairbanks, 2006Biomimetic devices show great potential as being molecular sensors of biological species. Gramicidin A (gA) is a well studied ionophore that can be easily modified at the C-terminus to be incorporated ...
Cushing, Gregory W.
core  

Single GAF Domain Phytochrome Exhibits a pH‐Dependent Shunt on the Millisecond Timescale

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
During their light‐induced photocycle, phytochromes can engage in a thermal reversion back to the initially excited state, denoted as a shunt. This study investigates a pH‐dependent shunt transition in the Pfr state of the All2699g1 phytochrome from Nostoc punctiforme using UV/Vis laser flash photolysis and kinetic modeling. The findings suggest a keto‐
Florian Trunk, Lisa Köhler, Tobias Fischer, Wolfgang Gärtner, Chen Song, Chavdar Slavov, Josef Wachtveitl   +6 more
wiley   +1 more source

Holographic Recording Materials Development [PDF]

Organic photorefractive materials were evaluated for application in a reversible holographic memory system. Representative indigo and thioindigo derivatives and several stilbene derivatives were studied as well as 15, 16-dialkyldihydropyrene derivatives ...
Craig, R. A., Perry, P. J., Schwerzel, R. E., Verber, C. M.   +3 more
core   +1 more source

A fluorophore attached to nicotinic acetylcholine receptor beta M2 detects productive binding of agonist to the alpha delta site [PDF]

, 2004
To study conformational transitions at the muscle nicotinic acetylcholine (ACh) receptor (nAChR), a rhodamine fluorophore was tethered to a Cys side chain introduced at the beta-19' position in the M2 region of the nAChR expressed in Xenopus oocytes ...
Auyeung, Vincent C., Bezanilla, Francisco, Chanda, Baron, Dahan, David S., Dibas, Mohammed I., Dougherty, Dennis A., Lester, Henry A., Petersson, E. James   +7 more
core  

Bifunctional Molecular Switches in Fused Diarylethene–Rhodamine Systems

ChemPhotoChem, EarlyView.
Spectroscopic and time‐dependent density‐functional theory studies show that these novel rhodamine‐based diarylethene (DAE) compounds display intense UV absorption, undergo reversible two‐step protonation involving triazole and rhodamine units, and respond selectively to acid, base, and metal ions.
Bassima Hoteit, Shunan Zhao, Corentin Poidevin, Arnaud Fihey, Keith Man‐Chung Wong, Julien Boixel   +5 more
wiley   +1 more source

A Study on the Photoisomerization of (E)-Dehydrozingerone, Its (E)-(E)-C₂ Symmetric Dimer, and Their O-Methylated Derivatives

Molecules
In this study, UV-induced (E)-to-(Z) geometrical isomerizations of the curcumin degradation product (E)-dehydrozingerone, along with curcumin-inspired (E)-O-methylated dehydrozingerone and their corresponding C2-symmetric dimers, were investigated.
Maria Antonietta Dettori, Valeria Ugone, Davide Fabbri, Paola Carta   +3 more
doaj   +1 more source

Photoisomerization of a Fullerene Dimer

The Journal of Physical Chemistry C, 2008
A photo-switchable fullerene dimer and its analogous nitrogen endohedral species have been synthesized and characterized. Irradiation by ultraviolet and visible light has been used to switch between the trans and cis isomers of both the C60- and N@C60- based dimers.
Zhang, Jinying, Porfyrakis, Kyriakos, Morton, John J. L., Sambrook, Mark R., Harmer, Jeffrey, Xiao, Li, Ardavan, Arzhang, Briggs, G. Andrew D.   +7 more
openaire   +4 more sources

Spin‐Crossover Modulated Luminescence in Materials and Molecular Complexes

Helvetica Chimica Acta, EarlyView.
The synergistic coupling of spin‐crossover and luminescent properties holds great promise for the development of multifunctional and stimuli‐responsive molecular materials. This contribution provides a comprehensive overview of the field, surveying the possible coupling mechanisms, the various synthetic strategies and their potential applicability, as ...
Charlotte Egger, Claude Piguet
wiley   +1 more source

Mechanism and Dynamics of Azobenzene Photoisomerization

Journal of the American Chemical Society, 2003
The excited-state dynamics of trans-azobenzene were investigated by femtosecond time-resolved photoelectron spectroscopy and ab initio molecular dynamics. Two near-degenerate pipi* excited states, S2 and S3,4, were identified in a region hitherto associated with only one excited state.
Schultz, Thomas, Quenneville, J, Levine, B, Toniolo, A, Martinez, TJ, Lochbrunner, S, Schmitt, M, Shaffer, JP, Zgierski, MZ, Stolow, A   +9 more
openaire   +4 more sources

Hydrogels Incorporating Donor–Acceptor Stenhouse Adducts as a Platform for Photoinduced, On‐Off Switchable Release of Small Molecule Cargos

Macromolecular Rapid Communications, EarlyView.
Donor–acceptor Stenhouse aDdducts (DASAs) are known for their photoinduced tautomerization, which, when conjugated to block copolymers, can self‐assemble into tuneable polymersomes. These DASA‐polymersomes are being investigated for light‐controlled cargo release in biomedical applications.
Tristan N. Dell, Ana Cammack‐Najera, Rea Tresa, Farzina Matubbar, Beyzanur Kaya, Uthaya Lathan, Mohamed Chami, Ray G. DiNardi, Omar Rifaie‐Graham, Jonathan P. Wojciechowski, Molly M. Stevens   +10 more
wiley   +1 more source