ΕΝΔΟΜΟΡΙΑΚΗ ΦΩΤΟΚΥΚΛΟΠΟΙΗΣΗ ΤΗΣ ΚΑΡΒΟΝΗΣ ΠΡΟΣ ΚΑΡΒΟΝΟΚΑΜΦΟΡΑ

THE QUANTUM YIELDS OF THE PHOTOCYCLOADDITION OF CARVONE (I) TO CARVONECAMPHOR (2) (TYPE) HAVE BEEN DETERMINED IN NON POLAR AND POLAR SOLVENTS, UNDER NITROGEN AND IN AIR-EQUILIBRATED SOLUTIONS. QUENCHING BY OXYGEN HAS BEEN OBSERVED ONLY IN NON POLAR SOLVENTS, BENZENE 01 --> 2=0.0025 UNDER NITROGEN AND 0.0012 IN AIR-EQUILIBRATED SOLUTIONS. SENSITIZATION EXPERIMENTS WITH BENZOPHENONE HAVE SHOWNALSO THAT THE REACTION IN BENZENE MUST PROCEED BY TRIPLET SENSITIZATION. A MARKED ENHANCEMENT OF THE QUANTUM YIELD HAS BEEN OBSERVED IN ETOH-H2O MIXTURES COMPARED TO THAT IN BENZENE AND IN ETOH, 01 --> 2=0.085 IN ETOH-H2O(2:8) & 0. 0088IN ETOH. INVOLVEMENT OF DIFFERENT EXCITED STATES IS SUGGESTED FOR THE PHOTOCYCLIZATION OF CARVONE IN NON POLAR (A TRIPLET STATE) AND IN HYDROXYLIC SOLVENTS (N,N* SINGLET STATE) ON THE BASIS OF THE RESULTS AND THE EFFECT OF WATER ON THE ABSORPTION SPECTRUM OF CARVONE. THE INTRAMOLECULAR PHOTOCYCLOADDITION OF CARVONE TO CARVONECAMPHOR HAS BEEN PROPOSED AMONG OTHER REACTIONS AS A POSSIBLE SYSTEM FOR SOLAR ENERGY STORAGE. TO THIS DIRECTION, THE REVERSE REACTION IN THE DARKWAS ACHIEVED FOR THE FIRST TIME BY USING RH2(CO)4CL2 AS A CATALYST.

Grantor dc:publisher

Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)

Year dc:date

1987

Author dc:creator

• Τσίπη, Δέσποινα

• ABSORPTION SPECTRA, EMISSION
• FLASH PHOTOLYSIS
• PHOTOCHEMICAL PRODUCTS
• QUANTUM YIELD MEASUREMENTS
• SENSITIZATION, BENROPHENONE
• SOLAR EMERGY STORAGE
• THE REVERSE REACTION
• ΑΠΟΘΗΚΕΥΣΗ ΗΛΙΑΚΗΣ ΕΝΕΡΓΕΙΑΣ
• ΜΕΤΡΗΣΕΙΣ ΚΒΑΝΤΙΚΗΣ ΑΠΟΔΟΣΗΣ
• ΠΑΛΜΙΚΗ ΦΩΤΟΛΥΣΗ
• ΦΑΣΜΑΤΑ ΑΠΟΡΡΟΦΗΣΗΣ, ΕΚΠΟΜΠΗΣ
• Φυσικές Επιστήμες
• Natural Sciences
• Χημεία
• Chemical Sciences

Language dc:language

gre

Identifier

10.12681/eadd/0560

OAI identifier oai:identifier

oai:10442/0560