Linear Conjugated Systems Bearing Aromatic Terminal Groups. XIV. On the Electronic Spectral Regularity of α,ω-Diarylpolyenes

スポンサーリンク

概要

• 論文の詳細を見る

• The bathochromic shift of the longest wavelength absorption maxima (λ) of several series of polyenes along with the increase in number of ethylenic double bond (<I>n</I>) can be expressed excellently by the empirical formula λ=<I>An<SUP>x</SUP></I>+<I>B</I>. The value of <I>x</I> varies from 0.5 to 0.8 [0.5≤<I>x</I>≤0.8] depending on the nature of terminal groups and the position of linking of polyene chain to terminal aryl nucleus, being <I>x</I>=0.5 in the case of parent polyenes (I) and <I>x</I>=0.8 for di(3-phenanthryl)- (VI) and di(2-fluorenyl)polyenes (VII). The linear relationship could be reproduced fairly well by the HMO method using the usual bond-alternation approximation (β<SUB>c=c</SUB>=1.1β; β<SUB>c-c</SUB>=0.9β; β<SUB>c=c</SUB>=β. C=C denotes aromatic double bond). The calculation based on a modified bond-alternation approximation (β<SUB>c=c</SUB>=[1+0.5⁄(<I>n</I>+4)]β; β<SUB>c-c</SUB>=[1−0.5⁄(<I>n</I>+4)]β; β<SUB>c=c</SUB>=β) which is analogous to that successfully applied to diarylpoly-ynes did not reproduce the spectral regularity of diarylpolyenes. This seems to offer further support for the pertinence of assumption of increasing contribution of cumulenic structure in diarylpolyenes along with the increase in <I>n</I>.

• 公益社団法人 日本化学会の論文

著者

• Akiyama Shuzo

  Department of Applied Physics and Chemistry, Fukui University of Technology

• Nishimoto Kichisuke

  Department of Chemistry Faculty of Science Osaka City University

• Nakagawa Masazumi

  Department of Chemistry Faculty of Science Osaka University

• Yasuhara Akio

  Department of Chemistry, Faculty of Science, Osaka University

• Takeuchi Yasuhira

  Department of Chemistry, Faculty of Science, Osaka University

関連論文

• A simple monitoring method of triazolam metabolism with ethanol-treated rat liver microsomes by the HPLC-UV detection for the preliminary examination of abused drugs interaction
• A Simple High-performance Liquid Chromatographic Method with UV Detection for the Determination of Fluoropyrimidines in Human Serum
• Pursuit of Reaction Process of 4-Nitrotoluene with Potassium t-Butoxide in N, N-Dimethylformamide in the Presence of Air by High-Performance Liquid Chromatographic Methods with UV and Three-Dimensional Photodiode Array-UV Detections
• An Ab initio MO Study of the Fragmentation Mechanism of the Cycloglycylglycine Ion in Mass Spectrometry
• Determination of Physical and Spectral Data on Thiazolidines for Trace Aldehyde Analysis(Analytical Chemistry)
• Electronic Structures of Naphthalenediols. II. β, β′-Naphthalenediols
• Synthesis of Trisubstituted Triptycenes and the Optical Resolution of 7-Carboxy-2,5-diacetoxytriptycene
• Acetylenic Analogues of Chichibabin Hydrocarbon
• Further Studies on the Intramolecular Cyclization of o, o′-Dihydroxydiphenyldiacetylene
• Another Example of the Formation of Highly Strained Cyclic Dimer of o-Diethynyl Compound
• Optical Activity and Absolute Configuration of 2,3 :6,7-Dibenzobicyclo [3.3.1]nona-2,6-diene Derivatives
• Linear Conjugated Systems Bearing Aromatie Terminal Groups. XI. Syntheses and Electronic Spectra of α,ω-Diphenanthrylpolyenes
• Linear Conjugated Systems Bearing Aromatic Terminal Groups. VIII. Syntheses and Electronic Spectra of Bis(4-biphenylyl)- and 2,2′-Difluorenylpoly-ynes
• Linear Conjugated Systems Bearing Aromatic Terminal Groups. XII. Syntheses and Electronic Spectra of α,ω-Di-2-pyrenyl-and α,ω-Di-2-fluorenylpolyenes
• Linear Conjugated Systems Bearing Aromatic Terminal Groups. XIV. On the Electronic Spectral Regularity of α,ω-Diarylpolyenes
• Optically Active Triptycenes. VII. Synthesis, Optical Resolution and Absolute Configuration of 3-Chloro and 4-Chloro-7-substituted Triptycenes.
• An MO study of organic sulfur compounds. Comparison with the corresponding oxygen compounds.
• The effect of .SIGMA.-.PI. interaction on the electronic structure of molecules in the excited states. II. Oscillator strength.
• Total Syntheses of Carbohydrates. III. DL-Glyceraldehyde and 2-Deoxy-DL-erythro-pentose
• Dethylroannulenes. III. Synthesis and properties of 1,5,10,14-tetra-tert-butyl-6,8,15,17-tetrakisdehydro(18)annulene.
• MO calculation of some aromatic radicals. Geometry and spin density of benzyl radical.
• Optical Activity of Bis-1,1′-spiroindanes. I. Optical Resolution and Absolute Configuration
• Solvent effect on the hydrogen bonds between guanine and cytosine and between hypoxanthine and cytosine.
• Linear Conjugated Systems Bearing Aromatic Terminal Groups. III. The Synthesis and the Electronic Spectra of 1,1′-Dinaphthyl- and 2,2′-Dinaphthylpoly-ynes
• Linear Conjugated Systems Bearing Aromatic Terminal Groups. IV. The Syntheses of Some Diarylacetylenes
• Syntheses of Decadiendiyndials and Tetradecatetraendiyndials and Intramolecular Cyclization of Former Dialdehydes
• Optical Activity of Bis-1,1′-spiroindanes. II. Absolute Configuration of Optically Active 5,5′- and 6,6′-Disubstituted-bis-1,1′-spiroindanes and Their Circular Dichroism Spectra
• Polarized absorption spectra of indole and benzimidazole.
• Optically Active 9,10-Dihydro-9,10-etheno and -ethanoanthracenes. I. Syntheses of Optically Active 1,5-Disubstituted-9,10-dihydro-9,10-etheno and -ethanoanthracenes.
• Intramolecular hydrogen bond between hydroxyl group and .PI.-base in 2-hydroxybiphenyl.
• An MO study of the reaction mechanism of photoisomerization from isoxazole via azirine intermediate to oxazole.
• The effective .PI.-electron Hamiltonian for the excited state. The effect of .SIGMA.-.PI. interaction.

もっと見る 閉じる

スポンサーリンク