Results 111 to 120 of about 44,548 (215)
Chemistry – A European Journal, Volume 32, Issue 10, 9 March 2026.One‐pot transition‐metal‐free methods for the synthesis of all three bonds of the alkyne's triple bond are reviewed. After analysis of several named reactions and discussion of improvements, recent advances in the synthesis of alkynes are discussed. Each section contains a proposed reaction mechanism and analysis of the strengths and weaknesses of the ...
Eugene Kim +4 more
wiley +1 more source
Holographic Recording Materials Development [PDF]
Organic photorefractive materials were evaluated for application in a reversible holographic memory system. Representative indigo and thioindigo derivatives and several stilbene derivatives were studied as well as 15, 16-dialkyldihydropyrene derivatives ...
Craig, R. A. +3 more
core +1 more source
Chemistry – A European Journal, Volume 32, Issue 10, 9 March 2026.It is a challenge to improve the selectivity of high‐denticity ligands for Mg2+ over Ca2+. We show that in aryl‐alkynyl derivatives of APTRA, electron‐withdrawing substituents lower the binding affinity for Ca2+ more than Mg2+, making the ligand more selective for Mg2+.
Laura L. Duncan +2 more
wiley +1 more source
Solvent-free phase-vanishing reactions with PTFE (Teflon®) as a phase screen
Beilstein Journal of Organic Chemistry, 2009 In a solvent-free phase-vanishing reaction with PTFE (polytetrafluoroethylene, Teflon®) tape as the phase screen, a thermometer adapter is utilized to insert a PTFE-sealed tube into the vapor phase above the substrate.
Kevin Pels, Veljko Dragojlovic
doaj +1 more source
Picosecond excitation of jet-cooled hydrogen-bonded systems: Dispersed fluorescence and time-resolved studies of methyl salicylatea [PDF]
, 1982 Long progressions involving frequency intervals of 180 cm^(−1) are observed in the fluoresence of MS for 3327.5 Å excitation ...
Felker, P. M. +2 more
core
Fluoreszenzlöschung von Stilben
CHIMIA, 1965 The quenching of the fluorescence of trans-stilbene in solution has been investigated. The quantum yield decreases strongly with increasing concentration of the solute (concentration quenching). On the other hand, the quenching effect of cis-stilbene and 1.1-diphenyl-ethylene is very small.
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Journal of Agricultural Sciences, 2009 Bu çalışmada, Kalecik karası Klon 12 Vitis vinifera L üzüm çeşidine ait kallus kültürlerinde, transresveratrol üretiminin uyarılması üzerine kallus yaşı, ultraviyole UV ışını uygulama ve inkübasyon süresinin etkisi incelenmiştir.
Birhan Kunter, Nurhan Keskin
doaj
Berichte der deutschen chemischen Gesellschaft, 1906 Franz Sachs, Siegfried Hilpert
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