Results 71 to 80 of about 5,692 (237)

Light Switchable Ionic Conductivity of Arylazopyrazole Modified Polysiloxanes

Advanced Materials Technologies, EarlyView.
We present a polysiloxane functionalized with a novel arylazopyrazole dye that undergoes reversible photoisomerization. Upon lithium bis(trifluoromethanesulfonyl)imide addition and UV irradiation, the polymer exhibits a shift in tan(d) toward higher frequencies and enhanced ionic conductivity.
Malte S. Beccard, Thulasinath Raman Venkatesan, Michael Bauer, Valentin Razvan Lupu, Philipp Scheidegger, Francesco Taddei, Frank A. Nüesch, Dorina M. Opris   +7 more
wiley   +1 more source

Synthesis and characterization of bis(4-amino-2-bromo-6-methoxy)azobenzene derivatives

Beilstein Journal of Organic Chemistry, 2019
Aminoazobenzene derivatives with four ortho substituents with respect to the N–N double bond are a relatively unexplored class of azo compounds that show promise for use as photoswitches in biology.
David Martínez-López, Amirhossein Babalhavaeji, Diego Sampedro, G. Andrew Woolley   +3 more
doaj   +1 more source

Schizophrenic molecules and materials with multiple personalities - how materials science could revolutionise how we do chemical sensing [PDF]

, 2009
Molecular photoswitches like spiropyrans derivatives offer exciting possibilities for the development of analytical platforms incorporating photo-responsive materials for functions such as light-activated guest uptake and release and optical reporting on
Benito-Lopez, Fernando, Byrne, Robert, Diamond, Dermot, Radu, Aleksandar, Scarmagnani, Silvia   +4 more
core   +1 more source

Phototunable Polarization Volume Gratings Driven by Chiral Hydrazone Switches

Advanced Optical Materials, EarlyView.
Chiral hydrazone photoswitches incorporated into polarization volume gratings enable light‐driven, reversible modulation of optical properties. UV and blue light irradiation reversibly alter the hydrazone isomer ratio, leading to tunable diffraction efficiency and spectral response across the visible spectrum.
Artem Boichuk, Lauri Uosukainen, Indu Bala, Ivan Aprahamian, Arri Priimagi   +4 more
wiley   +1 more source

Photoswitchable NIR‐Emitting Gold Nanoparticles [PDF]

Angewandte Chemie International Edition, 2016
AbstractPhoto‐switching of the NIR emission of gold nanoparticles (GNP) upon photo‐isomerization of azobenzene ligands, bound to the surface, is demonstrated. Photophysical results confirm the occurrence of an excitation energy transfer process from the ligands to the GNP that produces sensitized NIR emission.
BONACCHI, SARA, CANTELLI, ANDREA, BATTISTELLI, GIULIA, GUIDETTI, GLORIA, CALVARESI, MATTEO, MANZI, JEANNETTE, Gabrielli, Luca, Ramadori, Federico, Gambarin, Alessandro, Mancin, Fabrizio, MONTALTI, MARCO   +10 more
openaire   +3 more sources

Molecular Appendix Adjusted Architectural Propagations of Red‐Light Controlled Macroscopic Photoactuating Performances

Advanced Robotics Research, EarlyView.
Amphiphilic chloroazobenzenes, bearing different amino acids as end groups alanine, phenylalanine, and valine, exhibit excellent photoisomerizations. Varying structures of three amino acid groups participate in supramolecular formations and therefore photoinduced morphological transformations via adjusting intermolecular interactions. These interaction
Shuangshuang Meng, Ming‐Hin Chau, Takashi Kajitani, Franco King‐Chi Leung   +3 more
wiley   +1 more source

Design, Synthesis, Investigation, and Application of a Macromolecule Photoswitch

Frontiers in Chemistry, 2019
Azobenzene (AZO) has attracted increasing interest due to its reversible structural change upon a light stimulus. However, poor fatigue durability and the photobleaching phenomenon restricts its further application.
Juan Pang, Ziyu Gao, Huaping Tan, Xincheng Mao, Huiming Wang, Xiaohong Hu   +5 more
doaj   +1 more source

Optical Control of Metabotropic Glutamate Receptors [PDF]

, 2013
G-protein coupled receptors (GPCRs), the largest family of membrane signaling proteins, respond to neurotransmitters, hormones and small environmental molecules. The neuronal function of many GPCRs has been difficult to resolve because of an inability to
A Panatier, A Raveh, Adam Hoagland, Alexander F Schier, Andreas Reiner, B Altinbilek, B Lin, Benjamin Gaub, BK Kobilka, Brian Kane, BV Zemelman, C Grabher, C Lüscher, Carlos Pantoja, CM Niswender, David Schoppik, Dirk Trauner, DV Gutierrez, E Oh, Ehud Y Isacoff, G Chang, GA Kaminski, GJ Marek, GM Alexander, H Janovjak, HA Burgess, Harald Janovjak, HJ Bailes, IW Davis, J Bockaert, JA Saugstad, JL Leaney, JM Bekkers, JM Kim, Joshua Levitz, K Deisseroth, KL Pierce, KM Kwan, L Bordoli, L Hanna, L Iacovelli, M Banghart, M Koch, M Vivaudou, M Volgraf, MU Ehrengruber, N Caporale, P Gorostiza, Philipp Stawski, R Anwyl, R Kurita, R Shigemoto, RD Airan, RR Gainetdinov, S Szobota, SJ Bradley, SM Grauer, SR Ikeda, T Fehrentz, T Muto, T Takahashi, T Tsuji, T Yamashita, T Yamashita, X Li, X Qiu, Y Pei, Y Tanabe, Z Melyan   +68 more
core   +1 more source

Bidirectional Photoswitching of a Tailored Azobenzene with Red and Far‐Red Light Involving Triplet Sensitization in an Aqueous System

Advanced Science, EarlyView.
The action spectrum of a tailored azobenzene is shifted toward bio‐optical window through the chemical modification of its singlet and triplet energy levels. Consequently, the bidirectional photo‐switching of azobenzene in physiological conditions is achieved when excited by red and far‐red light, which offers greater tissue penetration.
Mila Miroshnichenko, Helen Hölzel, Edvinas Orentas, Karolis Kazlauskas, Pedro Ferreira, Fabienne Dumoulin, Carles Alcaide, Miquel Solà, Roger Bresolí‐Obach, Santi Nonell, Pankaj Bharmoria, Kasper Moth‐Poulsen   +11 more
wiley   +1 more source

Photoswitchable Sexithiophene-Based Molecular Wires [PDF]

Organic Letters, 2009
Photochromic sexithiophenes were prepared by oxidative electrochemical coupling of terthiophenes. The redox properties in the open state are typical of sexithiophenes. Ring closure of both photochromic units leads to a decrease in the energy of the LUMO orbitals with little affect on the energy of the HOMO orbitals.
Areephong, Jetsuda, Hurenkamp, Johannes H., Milder, Maaike T.W., Meetsma, Auke, Herek, Jennifer L., Browne, Wesley R., Feringa, Ben L.   +6 more
openaire   +3 more sources