Zobrazeno 1 - 10
of 239
pro vyhledávání: '"PETER G. SAMMES"'
Publikováno v:
Dyes and Pigments. 121:57-72
Isomeric equilbria of dinitro-substituted indolospirobenzopyrans, possessing 3′-gem-methyl- or 3′-cyclohexyl-substitutents, have been investigated using 1H NMR spectroscopy at six temperatures, ranging from 298 K to 410 K; isomerisation processes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a08472b11aa2a3d80374040253815e8
https://doi.org/10.1016/j.dyepig.2015.04.027
https://doi.org/10.1016/j.dyepig.2015.04.027
Publikováno v:
Dyes and Pigments. 90:146-162
A series of novel 6-nitro substituted indolospirobenzopyrans are reported. The effects of substitution on their photoreversibility are investigated by: synthesising derivatives that possess sterically hindering (with regard to the spiropyran-opening
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd744b94699dd5caff521c0a0607c99a
https://doi.org/10.1016/j.dyepig.2010.10.006
https://doi.org/10.1016/j.dyepig.2010.10.006
Publikováno v:
Dyes and Pigments. 83:31-50
Several, novel, 3′-, 5- and 3-substituted indolospirobenzopyrans were prepared and their reversible thermochromic equilibria were investigated by synthesising derivatives with appropriately placed “electronically” modifying substituents in both
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ba2bea4ea86909911832773f0963dc1
https://doi.org/10.1016/j.dyepig.2009.03.017
https://doi.org/10.1016/j.dyepig.2009.03.017
Publikováno v:
Dyes and Pigments. 82:226-237
The photoreversibility of several novel indolospirobenzopyrans was investigated using temperature studies – monitored using 1H NMR spectroscopy, qualitative UV studies and acid deuterolysis (trifluorodeuterioacetic acid (TFA-D)) catalysed isomerisa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5f1dcad10f222a86a4709d9892aed26
https://doi.org/10.1016/j.dyepig.2009.01.006
https://doi.org/10.1016/j.dyepig.2009.01.006
Publikováno v:
European Journal of Inorganic Chemistry. 2008:4951-4960
The photoreversible transportation of Zn 2+ ions across an interface using photochromic substituted-spirobenzopyrans has been demonstrated. The inclusion of strategically placed sterically influencing 3'-methyl-3b and 3-spirocyclohexyl-3c groupings i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a8a64a162164b0c2ae31a121c984e00
https://doi.org/10.1002/ejic.200800614
https://doi.org/10.1002/ejic.200800614
Publikováno v:
Dyes and Pigments. 76:319-326
Following our publication of the synthesis of the new 5-substituted crowned spirocyclic benzopyrans ( 3a – c ), and the fact that suitably placed substituents can be used to influence their metal-ion chelating properties [Roxburgh, CJ, Sammes, PG.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec0351d4ba15d75846a78a0c9e8ee30f
https://doi.org/10.1016/j.dyepig.2006.09.002
https://doi.org/10.1016/j.dyepig.2006.09.002
Autor:
Peter G. Sammes, Craig J. Roxburgh
Publikováno v:
European Journal of Organic Chemistry. 2006:1050-1056
The reversible photochemical ion chelation of the newly synthesised substituted N,N′-bis(spiro[1-benzopyran-2,2′-indolyl])diazacrown systems 15a–c and the subsequent molecular electronic control of this process using appropriately placed substi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59acd5cb217ff8dc0d7a3e72cb2c7308
https://doi.org/10.1002/ejoc.200500681
https://doi.org/10.1002/ejoc.200500681
Autor:
Jason P. Cross, Peter G. Sammes
Publikováno v:
Journal of Luminescence. 110:101-111
Incorporation of the 2-(2-hydroxyphenyl)-pyridine system into aza-crown systems produces novel ligands for lanthanide ions and can act as sensitising antennae for terbium (III) ions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d346c3affb0cceaf4c4718fcc5595ce
https://doi.org/10.1016/j.jlumin.2004.04.008
https://doi.org/10.1016/j.jlumin.2004.04.008
Publikováno v:
Journal of Luminescence. 110:113-124
Titrations of the Lehn cryptand [Ln⊂bpy.bpy.bpy]3+ complexes of both europium (III) and terbium (III) with fluoride and phosphate ions indicate that these anions displace water from the solvation sphere. In the case of the europium complex an enhan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::814cd7e6795f279826a118f39e55aa2d
https://doi.org/10.1016/j.jlumin.2004.05.004
https://doi.org/10.1016/j.jlumin.2004.05.004
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :1999-2005
Steric buttressing, using the removable trityl group as a protecting group for substituted allylamines, is used to effect selective cycloadditions and uncatalysed ene reactions under remarkably mild conditions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6595ff90e7d09dc64fa9ec3542d64b5d
https://doi.org/10.1039/b204778k
https://doi.org/10.1039/b204778k