2 Dioxetanes
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. "Photo" Chemistry Without Light?
In the early seventies, Giuseppe Cilento (São Paulo University), Emil White (Johns Hopkins University) and Angelo Lamola (AT&T Bell Laboratories) postulated that typical photochemical reactions could occur in dark parts of living organisms if coupled to enzymatic sources of electronically excited products. Their paradoxical hypothesis of "photochemistry wit
J. Braz. Chem. Soc.. Publicado em: 2015-12
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2. Luz: um raro produto de reação
The production of visible light by chemical reactions constitutes interesting and fascinating phenomena and several reaction mechanisms are discussed to rationalize excited state formation. Most efficient chemiluminescence reactions are thought to involve one or more electron transfer steps and chemiexcitation is believed to occur by radical annihilation. A
Química Nova. Publicado em: 2011
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3. Síntese de novos 1,2-dioxetanos estáveis e observação direta da etapa de quimiexcitação no sistema peróxi-oxalato / Synthesis of new stable 1,2-dioxetanes and direct observation of the chemiexcitation step in the peroxyoxalate reaction.
Neste trabalho foram sintetizados, purificados e caracterizados (RMN 1H e 13C) três 1,2-dioxetanos contendo como substituinte o grupo spiro- fenchílico (2-spiro(1,3,3-trimetil-biciclo[2.2.1]heptil), sendo dois destes inéditos. Para a obtenção dos precursores destes 1,2-dioxetanos foi desenvolvida uma nova metodologia para a síntese de enóis-éteres al
Publicado em: 2008
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4. Quimiluminescência de peróxidos orgânicos: geração de estados eletronicamente excitados na decomposição de 1,2-dioxetanos
In this review article, we give a general introduction on the mechanisms involved in organic chemiluminescence, where three basic models for excited state formation are presented. The chemiluminescence properties of 1,2-dioxetanes - four membered ring peroxides - are briefly outlined in the second part. In the main part, the mechanisms involved in the decomp
Química Nova. Publicado em: 2001-10
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5. Estudo da termólise de dioxetanos catalisada por trasferência intramolecular de elétron / Studies on the intramolecular electron transfer catalyzed thermolysis of 1,2-dioxetanes
The generation of visible light by a living organism or by a chemical reaction is a sufficiently rare and unusual event to attract the interest of biologists, biochemists and chemists. The chemiluminescent reaction most extensively investigated over the past 25 years, is the thermolysis of 1,2-dioxetanes. These high energy molecules generate mainly triplet e
Publicado em: 1997
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6. Non-radioactive detection of oligonucleotide probes by photochemical amplification of dioxetanes.
We describe a new method of non-radioactive labelling and detection of oligonucleotide probes. The approach is based on a simple chemical principle. Oligonucleotides labelled with methylene blue (a photosensitizer) are hybridized on a membrane to immobilized DNA target sequences. After hybridization and stringency washing 2(-)[3-(hydroxyphenyl)methoxymethyle