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Über den Einfluss nichtpolarer Lösungsmittel auf Lage und Intensität von Absorptionsbanden in den Elektronenspektren apolarer Molekeln: II. Polyacetylene
Author(s) -
Christen Heinz,
KlosterJensen Else
Publication year - 1973
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19730560535
Subject(s) - chemistry , cyclohexane , bathochromic shift , solvent , photochemistry , organic chemistry , physics , fluorescence , quantum mechanics
Abstract The dispersive interaction of nonpolar solutes with nonpolar solvents is investigated in model systems consisting of solutions of dimethyl‐tetraacetylene, di‐ t ‐butyl‐tetraacetylene, dimethyl‐pentaacetylene or di‐ t ‐butyl‐pentaacetylene in binary mixtures of cyclohexane/carbondisulfide or n ‐pentan/carbondisulfide. For this purpose the 1 Σ g +→ 1 Σ u +transition in the electronic spectrum of the solutions has been recorded. With increasing concentration of the more strongly interacting solvent component ( i.e . carbondisulfide) bathochromic shifts δν of the transition frequency accompanied by a decrease in oscillator strength f M are observed, which are consistent with calculated values based on a previously proposed exciton model [1].