Results 41 to 50 of about 2,183 (174)

Long Fluorescence Lifetime Molecular Rotors Based on the 4,4‐Dicyano‐BODIPY Core

Chemistry – A European Journal, EarlyView.
Substituting fluorine with cyano groups in BODIPY‐based fluorescent molecular rotors yields viscosity‐sensitive dyes with significantly enhanced fluorescence lifetimes that can be used for viscosity mapping in living cells using FLIM microscopy. ABSTRACT Environmentally sensitive fluorescent probes with extended emission lifetimes are highly valuable ...
Yelyzaveta Denysieva, Ludovic Richert, Yves Mély, Julie Karpenko, Dmytro Dziuba   +4 more
wiley   +1 more source

Boron Monofluoride Complexes Bearing π‐Expanded Coumarin Subunits: Facile Synthesis, Crystal Structure, and Solid‐State Enhanced Emission

Chemistry – A European Journal, EarlyView.
We here report the design, facile synthesis, experimental, and theoretical characterization of a novel class of monofluoroborate compounds featuring π‐expanded coumarin subunits displaying solid‐state enhanced Emission. The origin of this phenomenon is disclosed by combined theoretical and spectroscopic investigations.
Amine Assel, Fausto Puntoriero, Mohamed Chellegui, Antonio Santoro, Francesco Nicolò, Mayssa Zayene, Hichem Ben Jannet, Alessandro Auditore, Tianhong Yan, Alessandro Amadeo, Frédéric Labat, Ilaria Ciofini, Sebastiano Campagna   +12 more
wiley   +1 more source

Solvatochromic parameters for binary mixtures of an ionic liquid with various protic molecular solvents [PDF]

Monatshefte für Chemie - Chemical Monthly, 2008
Solvatochromic parameters (E N , normalized polarity parameter; π*, dipolarity/polarizability; β, hydrogen-bond acceptor basicity; α, hydrogen-bond donor acidity) have been determined for binary mixtures of propan-2-ol, propan ...
Khodadadi-Moghaddam, Mohammad, Habibi-Yangjeh, Aziz, Gholami, Mohamad Reza   +2 more
openaire   +1 more source

Xylose Acetals ‐ a New Class of Sustainable Solvents and Their Application in Enzymatic Polycondensation

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
Novel organic solvents with an unmodified carbohydrate core were synthesised both from D‐xylose and directly from biomass and were successfully used as reaction media for lipase biocatalysts to synthesise aliphatic and aromatic polyesters. Abstract The use of organic solvents in academic research and industry applications is facing increasing ...
Anastasia O. Komarova, Cicely M. Warne, Hugo Pétremand, Laura König‐Mattern, Johannes Stöckelmaier, Chris Oostenbrink, Georg M. Guebitz, Jeremy Luterbacher, Alessandro Pellis   +8 more
wiley   +1 more source

Tuning Colloidal Stability and Photothermal Conversion Efficiency of Graphite Nanofluids via Anionic‐Nonionic Surfactant Engineering

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Graphite nanofluids were stabilized using a mixed SDS/Tween 80 surfactant system. The optimized formulation exhibited enhanced colloidal stability, red‐shifted UV–Vis absorption, and improved photothermal conversion under solar irradiation. Achieving stable dispersion of graphite flakes (GFs) in aqueous media remains a critical challenge in developing ...
Ahmad Chehade, Shoaib Anwer, Md Islam, Eiyad Abu‐Nada   +3 more
wiley   +1 more source

The kinetics of the reactions of 2-substituted nicotinic acids with diazodiphenylmethane in various alcohols [PDF]

Journal of the Serbian Chemical Society, 2003
The rate constants of 2-substituted nicotinic acids in reaction with diazodiphenylmethane (DDM) in eight alcohols at 30 ºC have been determined. In order to explain the obtained results through solvent effects, the second order reaction rate constants (k)
Drmanić Saša Ž., Jovanović Bratislav Ž., Marinković Aleksandar D., Mišić-Vuković Milica M.   +3 more
doaj   +1 more source

The Serendipitous Discovery of Rollover Cyclometalation: From Unrecognized Observation to Transformative Chemistry

European Journal of Inorganic Chemistry, EarlyView.
Rollover cyclometalation is a distinctive variant of classical cyclometalation where a chelated heterocyclic ligand undergoes internal rotation, releasing one donor atom from coordination and subsequently activating a remote C─H bond with high regioselectivity.
Antonio Zucca, Maria I. Pilo
wiley   +1 more source

Carbonyl lock enables multi‐resonant organoboron framework with substantially enhanced spin‐flip and reduced emission bandwidth

FlexMat, EarlyView.
Integrating carbonyl lock onto multi‐resonant organoboron emitters is found to go beyond conventional bridge unit. It can not only suppress the molecular relaxation as conventional bridge, but also substantially affect electronic engineering via carbonyl integration, activating multiple up‐conversion channels, thus leading to an accelerated spin‐flip ...
Tingfeng Chen, Xin Xiong, Rajat Walia, Xiaochun Fan, Wei Liu, Xiankai Chen, Jia Yu, Kai Wang   +7 more
wiley   +1 more source

Orchestrating Anion–π+ Interactions to Accelerate Metal‐Free Room‐Temperature Phosphorescence

Angewandte Chemie, Volume 138, Issue 43, 19 October 2026.
Tuning anion–π+ interactions in pyridinium iodide contact ion pairs enables ultrafast metal‐free room‐temperature phosphorescence (540–605 nm) with radiative rates up to 5.2×105 s−1. Strong iodide→π+ charge‐transfer coupling, enhanced spin–orbit interactions, and dynamic ion‐pair organization accelerate intersystem crossing and emission, establishing ...
Eetu Hakkarainen, Corentin Montagne, Hao‐Cheng Lin, Chen‐Yu Lin, Khai‐Nghi Truong, Po‐Yu Chen, Anton Nechaev, Fabien B. L. Cougnon, Igor O. Koshevoy, Toni Eskelinen, Hao‐Wu Lin, Pi‐Tai Chou, Andrey Belyaev   +12 more
wiley   +2 more sources

Investigations of the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents. [PDF]

Journal of the Serbian Chemical Society, 2005
Rate constants for the reaction of diazodiphenylmethane with isomeric pyridine carboxylic acids were determined in chosen protic and aprotic solvents at 30 °C, using the well known UV spectrophotometric method.
ALEKSANDAR D. MARINKOVIC, SASA Z. DRMANIC, BRATISLAV Z. JOVANOVIC, MILICA MISIC-VUKOVIC   +3 more
doaj