Results 1 to 10 of about 7,561 (220)

Novel Method for Characterizing Humic Substances Using Fluorescent Solvatochromism [PDF]

Sensors
Charge-transfer-type fluorochromes, which exhibit shifts in fluorescence intensity and emission wavelength in response to solvent polarity changes, have been widely employed to investigate solute–solvent interactions. Humic substances (HSs) are naturally
Kazuto Sazawa, Hanae Koyama, Yusuke Yamazaki, Yoshiki Hara, Nozomi Kohama, Yustiawati Yustiawati, Hideki Kuramitz   +6 more
doaj   +2 more sources

PET-Driven Fluorescence Modulation in Halochromic Styryl Hemicyanine Dyes Targeting DNA Minor Groove [PDF]

Molecules
A new series of styryl hemicyanine dyes featuring substituted N-phenylpiperazine end groups was synthesized using an environmentally friendly procedure.
Teodora Aleksandrova, Aleksandar Pashev, Sonia Ilieva, Raimundo Gargallo, Diana Cheshmedzhieva, Aleksey Vasilev   +5 more
doaj   +2 more sources

The UV-Visible Absorption Spectra of Coumarin and Nile Red in Aqueous Solution: A Polarizable QM/MM Study [PDF]

Molecules
We present a comprehensive computational study of the UV-visible absorption spectra of 7-methoxycoumarin and Nile red in aqueous solution. Our fully atomistic workflow couples classical molecular dynamics (MD) with polarizable QM/MM based on fluctuating ...
Tommaso Giovannini, Matteo Ambrosetti, Chiara Cappelli   +2 more
doaj   +2 more sources

Two-photon transitions in triazole based quadrupolar and octupolar chromophores: a TD-DFT investigation [PDF]

, 2010
C. Katan present address: CNRS UMR6082 FOTON, INSA de Rennes, 20 avenue des Buttes de Coësmes, CS 70839, 35708 RENNES cedex 7, FranceInternational audienceSimultaneous absorption of two photons has gained increasing attention over recent years as it ...
Even, Jacky, Katan, Claudine, Tretiak, Sergei   +2 more
core   +3 more sources

Donor–Acceptor Fluorophores for Energy-Transfer-Mediated Photocatalysis [PDF]

, 2018
Triplet–triplet energy transfer (EnT) is a fundamental activation pathway in photocatalysis. In this work, we report the mechanistic origins of the triplet excited state of carbazole-cyanobenzene donor–acceptor (D–A) fluorophores in EnT-based ...
Huang, Jier, Li, Shuzhou, Liu, Qiuhua, Lu, Jingzhi, Pattengale, Brian, Shi, Wenxiong, Yang, Sizhuo, Zhang, Jian   +7 more
core   +3 more sources

Use of DFT Calculations as a Tool for Designing New Solvatochromic Probes for Biological Applications

Liquids
The intramolecular charge transfer behavior of push–pull dyes is the origin of their sensitivity to environment. Such compounds are of interest as probes for bioimaging and as biosensors to monitor cellular dynamics and molecular interactions. Those that
Cynthia M. Dupureur
doaj   +1 more source

Synthesis, electrochemical and spectroscopic properties of molybdenum complexes bearing 5-alkoxy-thiophenic or- bithiophenic groups [PDF]

, 2005
Trans-[FMo{NN=CH(5´-R-thienyl)}(dppe)2][BF4] (R = OMe and OEt) and trans[FMo{NN=CH(5’-R-2,2’-bithienyl)}(dppe)2][BF4] (R = OMe, OEt and O(iPr)) were synthesised in good yields by reacting 2-formyl-5-alkoxylthiophenes and 5-formyl-5 ...
Ashwell, Batista, Chatt, Cheng, Fairhurst, Hidai, Ishii, Kamlet, Malaun, Meyer-Friedrichsen, Mignani, Nalwa, Raposo, Raposo, Raposo, Raposo, Reichardt, Roberto, Sohn, Steybe, Wong, Zyss, Zyss)   +22 more
core   +1 more source

Cryo-solvatochromism in ionic liquids

RSC Adv., 2014
The colour changing temperature of the thermo-solvatochromic solution of a chloro-nickel complex, di-(1-butyl-3-methylimidazolium) tetrachloronickelate, [bmim]2NiCl4 (0.14 mol L−1 in the photograph), in 1-(2-hydroxyethyl)-3-methylimidazolium tetrafluoroborate, [C2OHmim]BF4, can be continuously decreased from above room temperature to well below 0 °C ...
Linpo Yu, George Z. Chen
openaire   +2 more sources

Push–Pull Bridged Stilbenes as Small Solvatochromic Aggregation‐Induced Emission Luminogen: Design and Excited‐state Deactivation Dynamics

Aggregate
Aggregation‐induced emission luminogens (AIEgens) are typically large π‐conjugated molecules, but their low affinity and noninvasiveness toward analytes limit practical applications. To address this, smaller, more planar AIEgens are needed.
Takuya Tanaka, Hirosato Koyanagi, Takumi Ehara, Tomohiro Ryu, Kiyoshi Miyata, Satoshi Suzuki, Kazunobu Igawa, Ken Onda, Gen‐ichi Konishi   +8 more
doaj   +1 more source

Dipicolylamine styryldiazine derivatives: Synthesis and photophysical studies

, 2015
International audienceDifferent D-π-A push-pull mols. in which dipicolylamine (DPA) is used as the donor group, different diazines as the acceptor groups, and styryl as the π-conjugated spacer have been synthesized in a straightforward manner by aldol ...
Achelle, Sylvain, Bures, Filip, Robin-Le Guen, Francoise, Rodriguez-Lopez, Julian   +3 more
core   +3 more sources