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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Studies of reactions of excited oxygen atoms of atmospheric importance

Ralph, D. G. January 1985 (has links)
No description available.
12

Acylperoxyl radicals and their reactions with carotenoids in polar and non-polar solvents

El-Agamey, Ali Abdel Ghani January 2003 (has links)
No description available.
13

Photophysical and photochemical properties of fullerene derivatives

Quaranta, Annamaria January 2003 (has links)
No description available.
14

The Photolysis of Ethyllithium and Triethylaluminum

Brewer, Terry Lowell 01 1900 (has links)
The majority of interest in organolithium and organoaluminum compounds has centered around their potency as polymerization catalysts.
15

Photoinduced electron transfer on the surface of silica gel

Crossley, Jill E. January 2000 (has links)
The kinetics of electron transfer between the radical cations of a series of anthracene derivatives and a variety of amine electron donors were studied on the surface of silica gel. The anthracene derivatives were excited with 355 nm radiation and formed radical cations by multi-photon ionisation. The radical cation absorption decay was measured by diffuse reflectance laser flash photolysis at wavelengths between 680 and 780 nm, depending upon the identity of the substituent of the anthracene. The decay kinetics of the radical cations were complex and non-exponential. The addition to the surface of a co-adsorbed electron donor, with an oxidation potential below that of the anthracene derivative resulted in an increase in the rate of the radical cation decay because of the electron transfer from the donor species. The kinetics of electron transfer were fitted with using the dispersive model of Albery.
16

Photochromism of naphthoxazine-spiro-indolines

Hobley, Jonathan January 1995 (has links)
Naphthoxazine-spiro-indolines (NOSIs) can exist in a colourless and a coloured form. These compounds can interconvert between these two forms either photochemically or thermally and are resilient to degradation even after repeated cycles of colouration and bleaching. Absorption spectra of both the stable colourless form and the energetically less stable coloured form have been measured. Several NOSI compounds have been shown to photoconvert to the coloured form with an efficiency of between 0.06–0.74, depending upon the compound conditions under which the conversion is brought about. The factors which have been varied in this work are: the basicity of the 6'-substituent; the size of the N-alkyl group within these compounds; and the nature solvent or matrix in which the reaction occurs. Electron donation from the 6'-group has been shown to increase the quantum yield of the forward reaction whereas solvent polarity increases have been shown to reduce the quantum yield.
17

Estudo da reacao seletiva de abstracao do atomo de hidrogenio na radiolise e na fotolise de misturas de alcanos a 77 K

GUEDES, SELMA M.L. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:30:12Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:04:11Z (GMT). No. of bitstreams: 1 00381.pdf: 1940550 bytes, checksum: 03c39e8c3721dff24ae588c477a32ece (MD5) / Dissertacao (Mestrado) / IEA/D / Instituto de Energia Atomica - IEA
18

Estudo da reacao seletiva de abstracao do atomo de hidrogenio na radiolise e na fotolise de misturas de alcanos a 77 K

GUEDES, SELMA M.L. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:30:12Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:04:11Z (GMT). No. of bitstreams: 1 00381.pdf: 1940550 bytes, checksum: 03c39e8c3721dff24ae588c477a32ece (MD5) / Dissertacao (Mestrado) / IEA/D / Instituto de Energia Atomica - IEA
19

2-substituted anthraquinones as photoinitiators of free radical polymerisation

Pullen, Graeme K. January 1996 (has links)
No description available.
20

An investigation of the colouration kinetics within bipyridilium electrochromic systems

Hodgkinson, Neil Michael January 1997 (has links)
No description available.

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