Results 11 to 20 of about 370 (160)

Solvatochromism, Acidochromism and Photochromism of the 2,6-Bis(4-hydroxybenzylidene) Cyclohexanone Derivative [PDF]

International Journal of Molecular Sciences, 2023
In this paper, we studied the photophysical behavior of 2,6-bis(4-hydroxybenzylidene) cyclohexanone (BZCH) under the influence of various stimuli. The photophysical properties were correlated with different solvent parameters, such as the Kamlet–Abraham–Taft (KAT), Catalán, and Laurence solvent scales, suggesting that the behavior of BZCH is influenced
Mihaela Homocianu, Diana Serbezeanu, Tachita Vlad-Bubulac   +2 more
exaly   +4 more sources

Phenanthrothiophene-Triazine Star-Shaped Discotic Liquid Crystals: Synthesis, Self-Assembly, and Stimuli-Responsive Fluorescence Properties [PDF]

Chemistry – A European Journal, Volume 30, Issue 27, May 14, 2024.
Lipophilic biphenylthiophene- and phenanthrothiophene-triazine compounds, BPTTn and CPTTn, respectively, were prepared by a tandem procedure involving successive Suzuki-Miyaura coupling and Scholl cyclodehydrogenation reactions.
Deng, Wen Jing, Donnio, Bertrand, Redshaw, Carl, Zeng, Chong Yang, Zhao, Ke Qing   +4 more
core   +3 more sources

Noncommutative Switching of Double Spiropyrans. [PDF]

J Phys Chem A, 2020
The spiropyran family of photochromes are key components in molecular-based responsive materials and devices, e.g., as multiphotochromes, covalently coupled dyads, triads, etc.
Kortekaas L, Steen JD, Duijnstee DR, Jacquemin D, Browne WR.   +4 more
europepmc   +4 more sources

Photon-Working SwitchesProperties and Applications of Indolinooxazolidines as Photo-, Electro-, and Acidochromic Units [PDF]

, 2017
The aim of this chapter was to introduce the readers to indolinooxazolidines (IndOxa), a new family of molecular switches. First, in a short historical account their evolution is followed from their first appearance in the 1970s until today.
G. Szalóki, K. Nakatani, L. Sanguinet, Y. Yokoyama   +3 more
core   +4 more sources

Bioaggregachromism of Asymmetric Monomethine Cyanine Dyes as Noncovalent Binders for Nucleic Acids. [PDF]

Biosensors (Basel)
Two new asymmetric monomethine cyanine dyes, featuring dimethoxy quinoliniumor methyl quinolinium end groups and benzothiazole or methyl benzothiazole endgroups were synthesized.
Ilieva S, Petkov N, Gargallo R, Novakov C, Rangelov M, Todorova N, Vasilev A, Cheshmedzhieva D.   +7 more
europepmc   +2 more sources

Spiropyran‐Based Photoisomerizable α‐Amino Acid for Membrane‐Active Peptide Modification [PDF]

Chemistry – A European Journal, Volume 30, Issue 22, April 16, 2024.
Photoisomerizable peptides are promising drug candidates in photopharmacology. While azobenzene- and diarylethene-containing photoisomerizable peptides have already demonstrated their potential in this regard, reports on the use of spiropyrans to ...
Afonin, Sergii, Babii, Oleg, Borysov, Oleksandr V., Grage, Stephan L., Hrebonkin, Andrii, Jirgensons, Aigars, Komarov, Igor V., Koniev, Serhii, Leitis, Gundars, Lorig, Theo, Nick, Peter, Nikitjuka, Anna, Ulrich, Anne S.   +12 more
core   +3 more sources

Photo-Modulated Proton Transport in Merocyanine Metastable-State Photoacid Based Polymers. [PDF]

Small
The covalent incorporation of merocyanine metastable‐state photoacid into soft polymers imparts conductivity to otherwise insulating matrices, allowing light‐triggered control of charge and structure, offering a new platform for photo‐responsive, ion‐conducting materials.
Pacella G, Kim M, Hannah R, Chiechi RC, Faraji S, Portale G.   +5 more
europepmc   +2 more sources

Optical Force Monitoring in Polymeric Materials with a Coumarin-Based Mechanophore. [PDF]

Angew Chem Int Ed Engl
Coumarin dyes are reacted with acrylates to form a mechanophore via an accessible two‐step synthesis that exhibits exclusive responsivity to force. Mechanical deformation of polymeric materials functionalized with the mechanophore activates blue fluorescence visible to the naked eye, enabling the optical detection of force‐induced molecular damage in ...
Li Y, Clough JM.
europepmc   +3 more sources

Twisted 1- and 2-Azaperopyrenes: Synthesis, Structure, and Properties. [PDF]

Chemistry
ABSTRACT A synthesis of hitherto unknown 1‐ and 2‐azaperopyrenes, twisted nitrogen‐doped peropyrenes, is reported. The synthesis is based on a Brønsted acid‐mediated benzannulation of alkynes. Key alkyne intermediates are synthesized via two complementary routes, including a Pd/C‐catalyzed, copper‐ and amine‐free Sonogashira‐type coupling of (hetero ...
Molenda R, Vardanyan A, Villinger A, Ehlers P, Langer P.   +4 more
europepmc   +2 more sources

Excited-State Proton Transfer in Push-Pull N-Methyl Pyridium Reversible Super-Photoacids Ruled by Intramolecular Hydrogen-Bond-Like Interactions. [PDF]

Chemistry
Push‐pull A+‐π‐D N‐methyl pyridinium derivatives were found to act as efficient reversible superphotoacids. Upon excitation, they undergo a fast ESPT but recombine with the released proton when the excitation is turned off. In the ortho isomers, intramolecular hydrogen‐bond‐like interactions between the hydroxyl group and the ethenic hydrogen are ...
Cesaretti A, Bonaccorso C, Alebardi M, Grasso A, Quinzi R, Carlotti B, Elisei F, Fortuna CG, Spalletti A.   +8 more
europepmc   +2 more sources