HOME E-MAIL ENGLISH JOURNAL
ѱȸ ѱȸ
 
    * PDF α Ͻñ ٶϴ.
⵵/ȣ 1994 / ȣ: V.6,no.1,Mar
1() Squarylium, Croconium ɼ ռ Ʈ
2(Ÿ) Syntheses and Absorption Spectra of Polymethine Cyanine Dyes Such as Squarylium and Croconium Dyes
() 輺 (ϴб а) Ѽ (ϴб а) ӿ (ϴб а)
(Ÿ)
Ҽ() 輺 (ϴб а) Ѽ (ϴб а) ӿ (ϴб &
Ҽ(Ÿ)
/ 28 ~ 32 : 5
() Korean
ʷ The synthesis and absorption spectra of squarvlium(SQ) dyes and croconium(CR) dyes were .studied. Absorption spectra of SQ dye in various solvents exhibited a negative solvatochrornism. Thus, it was suggested that the structure of SQ dye may be a highly polar structure. The of CR dyes undergoes a bathochromic shift of about 100nm compared with the corresponding SQ dyes. This shift can be calculated by the Pariser-Parr-Pople molecular orbital method. From the PPP MO calculation results, we found that SQ dye and CR dye have a almost same Highest Occupied Molecular Orbital(HOMO) level(SQ : -8.0eV, CR : -8.09eV). On the other hand, energy levels of Lowest Unoccupied Molecular Orbital(LUMO) of SQ and CR dyes are -4.09eV and -4.13eV respectively. Thus, replacement of five membered ring by four membered ring in SQ dye causes a large bathochromic shift.t.
Ű
ȸ
Reference

                                                                            
¶γ
˻
ǥû
ȸȳ
ãƿô±
관련사이트
copyright