Results 91 to 100 of about 4,840 (219)

Advances in Unconventional and Sustainable Synthetic Approaches to Benzopyran Scaffolds

The Chemical Record, EarlyView.
This review provides a comprehensive and critical analysis of low‐impact synthetic methodologies reported in the last 8 years (2018–2026) for the construction of benzopyran‐derived scaffolds, such as coumarins, flavones, chromones, chromenes, and chromanes. The benzopyran scaffold is a versatile family of heterocycles found in a wide range of bioactive
Nathalia B. Sá, Patrick C. Nobre, Isabelly O. Ferreira, Juliano B. Azeredo, Vanessa Nascimento   +4 more
wiley   +1 more source

Exploring the optoelectronic properties of a chromene-appended pyrimidone derivative for photovoltaic applications

Open Chemistry, 2019
In the present study, a chromene-appended pyrimidone derivative (PBA) has been synthesized in order to account for the relationship between chemical structure and charge transport properties.
Assiri Mohammed A.
doaj   +1 more source

Effects of organic solvents on the depth‐of‐cure determination of conventional and bulk‐fill resin composites

European Journal of Oral Sciences, EarlyView.
Abstract This study investigated the influence of organic solvents on the depth of cure (DOC) of resin composites. Two conventional (Filtek Universal [FU] and Beautifil II [BE]) and two bulk‐fill (Filtek One Bulk Fill [FO] and Beautifil‐Bulk [BB]) composites were evaluated.
Beatriz de Cássia Romano, Frederick Allen Rueggeberg, Jorge Soto‐Montero, Carolina Bosso Andre, Marcelo Giannini   +4 more
wiley   +1 more source

Directional Second Sphere Effect on CO2 Activation and Reduction by Iron Porphyrin in Aprotic and Protic Media

Angewandte Chemie, Volume 138, Issue 42, 12 October 2026.
Directional control within the secondary coordination sphere redefines CO2 reduction by iron porphyrins. Simply rearranging identical urea hydrogen‐bond donors modulates reactivity, revealing that optimal catalysis does not only arise from maximal intermediate stabilization, but also from directional, adaptive non‐covalent interactions that balance ...
Ashutosh Vishwakarma, Sami Essid, Sarah Bouery, Régis Guillot, Bernard Boitrel, Philipp Gotico, Marie Sircoglou, Zakaria Halime   +7 more
wiley   +2 more sources

Investigating The Molecular Dynamics Of Caffeine In Protic And Aprotic Solvents Using 1H NMR Relaxation Measurements [PDF]

E3S Web of Conferences
Coffee is renowned for its rich composition of bioactive compounds, including caffeine. While the macroscopic effects of caffeine are well documented, a comprehensive understanding of molecular dynamics at the microscopic level remains limited ...
Ayu Hana Margareta Mailinda, Wonorahardjo Surjani, Utomo Yudhi, Roy Asrori Muhammad   +3 more
doaj   +1 more source

Development of chalcones structure‐related to avobenzone: Photoprotection, photostability, and safety evaluation

Photochemistry and Photobiology, EarlyView.
Scaffold hopping strategy used to develop chalcones structure‐related to the avobenzone tautomer. Positive aspects of 2‐hydroxychalcones are highlighted. Abstract Chalcones are α,β‐unsaturated ketones with extended π‐conjugation, making them promising scaffolds for the development of organic UV filters.
Gabriela Zanella Marcon, Taíne de Bastos Brum, Nayara Fernanda Tokashike de Araujo, Gabriela Lascala Ramos, Bruna Cogo Borin, Ruth Barin, Aline Ferreira Ourique, André Passaglia Schuch, Andréa Inês Horn Adams, Lorena Rigo Gaspar Cordeiro, Letícia Cruz, Fernando Fumagalli   +11 more
wiley   +1 more source

Coordination‐Encoded Microenvironments in Copper Cluster Metal–Organic Frameworks Govern CO2‐To‐Formate Selectivity Through Intermediate Binding Regulation

Aggregate, Volume 7, Issue 11, November 2026.
Coordination environments established during reticular assembly determine how reaction intermediates are stabilized on atomically precise copper cluster frameworks. Rather than maximizing undercoordinated sites, a coordinatively buffered multinuclear landscape maintains productive intermediate binding, promoting formate formation while suppressing ...
Riki Nakatani, Ayumu Kondo, Priyanka Ghosh, Amitabha Das, Yuya Sugawara, Yunosuke Arai, Tokuhisa Kawawaki, Kosei Suzuki, Koichi Yasuma, Akira Yamaguchi, Saikat Das, Biswarup Pathak, Yuichi Negishi   +12 more
wiley   +1 more source

One-Electron Reduction Potential for Oxygen- and Sulfur-Centered Organic Radicals in Protic and Aprotic Solvents

, 2016
We estimated one-electron reduction potentials of redox-active organic molecules for a spectrum of eight different functional groups (phenoxyl, p-benzoquinone, phenylthiyl, p-benzodithiyl, carboxyl, benzoyloxyl, carbthiyl, and benzoylthiyl) in protic ...
Ernst-Walter Knapp (1648654), Marcel Schmidt am Busch (365006)   +1 more
core   +1 more source

SOLVATOCHROMISM OF ASYMMETRICAL SUBSTITUTED 3,7-DIAMINOPHENOTHIAZINIUM DYE

Studia Universitatis Babes-Bolyai Chemia, 2015
A convenient procedure for the synthesis of 3-diethylamino-7-phenylaminophenothiazin-5-ium iodide was developed and the solvatochromism of this blue dye was examined by means of UV-Vis spectroscopy.
Camelia CIOBOTARIU, Lucian Cornel POP, Dan Ioan PORUMB   +2 more
doaj  

Interaction With Surface Spins as a Contribution to Nuclear Magnetic Relaxation of Liquids Adsorbed in Mesoporous Materials

Magnetic Resonance in Chemistry, Volume 64, Issue 11, Page 917-929, November 2026.
Liquids at silica interfaces experience demixing as a consequence of their respective polarity. The distribution of liquids and their primary relaxation contributions are studied by surface modification with OD and radical moieties, respectively. ABSTRACT NMR relaxation of liquids in the presence of solid interfaces, such as silica gel or porous glass,
Carlos Mattea, Hannah Leptin, Moritz Schmidt, Siegfried Stapf   +3 more
wiley   +1 more source