Results 51 to 60 of about 2,636 (208)

Organic and Metallacages for Chemical Sensing: Progress in Water‐Compatible Systems

open access: yesAdvanced Sensor Research, Volume 5, Issue 3, March 2026.
Supramolecular cages function as three‐dimensional receptors for selective molecular recognition and sensing, and this review outlines design principles for water‐stable architectures, key analyte‐ and medium‐dependent challenges, recent water‐compatible examples (including polymer‐integrated systems), and future opportunities for cage‐based ...
Rabia Zahid   +4 more
wiley   +1 more source

Synthesis of Novel Fused Heterocycles Based on Pyrano[2,3-c]pyrazole

open access: yesMolecules, 1998
3-Substituted 1,2,4-triazole derivatives (5, 9, 13, 16b, 19), pyrimidinium salts (21), triazines (24), and aryl methylene hydrazono pyrazolopyrano-pyrimidine (27a,b) which are rearranged in basic medium to 30a,b, were afforded via the reaction of 6-amino
M. E. A. Zaki
doaj   +1 more source

Synthesis, Properties, Applications and Challenges of Multicomponent Doped Organic Room Temperature Phosphorescence Materials

open access: yesAggregate, Volume 7, Issue 3, March 2026.
The multi‐component doping strategy, involving self‐assembly, host‐guest systems, and crystal engineering, has gained attention for its simplicity, cost‐effectiveness, structural diversity, and adjustable room‐temperature phosphorescence (RTP). This review summarizes and evaluates the progress in creating RTP materials using this strategy, highlighting
Zhenjie Zhou   +10 more
wiley   +1 more source

Site-selectivite Synthesis and Tautomerism of Arylazo Derivatives of Pyrazolo[3,4-d]pyrimido-[1,6-b][1,2,4]triazine [PDF]

open access: yes, 2008
A simple synthetic strategy is described for synthesis of the hitherto unreported 5-arylazo-1,3-diphenyl-6-substituted-1H-pyrazolo[3,4-d]pyrimido[1,6-b][1,2,4]triazines 5a-n.
Darwish, Manal A. A.   +3 more
core  

Erucastrum virgatum subsp. virgatum (Brassicaceae) Endemic to Sicily (Italy): Biological Properties and Phenolic Content of Leaf Extracts

open access: yesChemistry &Biodiversity, Volume 23, Issue 3, March 2026.
ABSTRACT The present work reports a comparative study between extracts obtained by different methods (ultrasonic bath‐assisted extraction, maceration, decoction, and Soxhlet extraction) from the leaves of Erucastrum virgatum subsp. virgatum collected in Sicily (Italy), using ethanol and water as “green” solvents.
Benedetta Galletta   +8 more
wiley   +1 more source

Azine Derivatives as a New Generation of Insect Growth Regulators

open access: yesCHIMIA, 2003
A new generation of insect-growth-regulator insecticides, the azines, are presented. They inhibit the chitin biosynthesis process and are active against lepidopteran pests. Their synthesis and a structure–activity relationship will be discussed.
Martin Eberle   +7 more
doaj   +1 more source

Copper Coordination Materials for Selective CO2 Electroreduction Toward Multi‐Carbon Products

open access: yesCarbon Neutralization, Volume 5, Issue 2, March 2026.
This review summarizes recent advances in Cu‐based coordination catalysts for electrochemical CO2 reduction reaction (CO2RR) toward multi‐carbon products. It focuses on key kinetics such as C–C coupling, and outlines design strategies and catalytic mechanisms of various Cu‐based coordination materials.
Jinze Yang   +5 more
wiley   +1 more source

Химия гетероциклических диазосоединений [PDF]

open access: yes, 2014
Рассмотрены методы получения нитрозаминов, солей диазония гетероциклов, а также диазососоединений гетероциклического ряда, подобных по структуре алифатическим диазосоединениям.
Мокрушин, В. С.   +1 more
core  

5,6-Dihydro-2H-pyran-3(4H)-on als Baustein zur Synthese pyrananellierter Heterocyclen [PDF]

open access: yes, 1984
Während 5,6-Dihydro-2H-pyran-3(4H)-on (3) sich mit ortho-substituierten Phenylcarbonylverbindungen nur in Einzelfällen regioselektiv zu pyrananellierten Heterocyclen umsetzt - z. B.
Eiden, Fritz, Wanner, Klaus Th.
core   +1 more source

f‐Block Element‐Based MOF Thin Films: A Platform for Luminescence, Sensing, and Energy Applications

open access: yesSmall, Volume 22, Issue 16, 17 March 2026.
f‐Block element–based metal–organic framework (f‐MOF) thin films offer exceptional potential for luminescent, sensing, and energy‐related applications. This review surveys recent progress in their synthesis, characterization, and functional implementation, emphasizing the diversity of available thin‐film fabrication strategies. The convergence of these
Dong‐Hui Chen, Christof Wöll
wiley   +1 more source

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