Über konjugierte Doppelbindungen I. Synthese von Diphenyl‐poly‐enen

Kühn, Richard; Winterstein, Alfred

doi:10.1002/hlca.19280110107

Cited by 144 publications

(12 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are six theoretically possible stereoisomers of DPH [22,23], The considerations of Pauling [24,25] regarding spatial conditions have led to the opinion that in the case of the existence of normal localized double bonds the number of isomers is lower due to steric conditions. Experimental investigations enabled the conclusion to be drawn of the existence of polyenes with a forbidden system of double c/s-bonds [26,27].…”

Section: Discussionmentioning

confidence: 99%

Isomerization of Diphenyl Polyenes. Part V. The Origin of Fluorescence of l,6-Diphenyl-1,3,5-hexatriene in Poly (vinyl alcohol) Films

Kawski

Kubicki

Kukliński

et al. 1993

Zeitschrift Für Naturforschung A

View full text Add to dashboard Cite

The effect of temperature on the absorption and fluorescence spectra of l,6-diphenyl-l,3,5-hexatriene (DPH) was investigated in three different polymer films: polyvinyl chloride) (PVCh), polyvinyl formal) (PVF) and polyvinyl alcohol) (PVA) in the temperature range 296-423 K. Anomalous behaviour of the fluorescence intensity was observed only for DPH in non-heated PVA film. The intensity distribution in the fluorescence band of DPH in both non-heated and heated PVCh and PVF films was found to be independent of the excitation light wavelength, A exc . The behaviour of DPH is similar in the PVA film heated to 423 K. For these samples, single exponential fluorescence decay was observed. The behaviour of non-heated DPH samples in PVA is quite different, the intensity distribution and the fluorescence band position depending strongly on ^. exc and the fluorescence decay being double exponential. It can be inferred that the fluorescence of DPH in a non-heated PVA sample consists of two components, the first originating from the all-trans conformer and the second from the ground-state s-eis conformer.

show abstract

Section: Discussionmentioning

confidence: 99%

Isomerization of Diphenyl Polyenes. Part V. The Origin of Fluorescence of l,6-Diphenyl-1,3,5-hexatriene in Poly (vinyl alcohol) Films

Kawski

Kubicki

Kukliński

et al. 1993

Zeitschrift Für Naturforschung A

View full text Add to dashboard Cite

show abstract

“…The synthesis of the a,w-bis(meta dihydroxyphenyl) alkanes is now in progress. (5). The mixture was cooled to 40' and pale yellow plate crystals were separated.…”

Section: By Ole Gisvoldi Donald Buelowo and Edward H Carlsonmentioning

confidence: 99%

The Synthesis of Some Alpha, Omega‐Bis‐(3,4‐Dihydroxyphenyl) Alkanes*

Gisvold

Buelow²,

Carlson

1946

Journal of the American Pharmaceutical Association (Scientific

View full text Add to dashboard Cite

“…The 1,2-glycols, such as hydrocinnamoin, when treated with phosphorus diiodide in ether give excellent yields of the diphenyl polyenes (4). The method has now been extended (5) to 1,4-glycols and 1,6-glycols obtained from the condensation of polyenals with acetylenedimagnesium bromide and diacetylenedimagnesium bromide respectively.…”

mentioning

confidence: 99%

“…The ethylene (4.6 g., 25.0%) melted at 110-111°. 4 (b) Activated magnesium was covered with 10 ce. of ether and a solution of 21.0 g. (0.12 mole) of benzyl bromide in 50 cc.…”

mentioning

confidence: 99%