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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 40, Number 12
JKCSEZ 40(12)
December 20, 1996

Title	Syntheses and Characteristics of Polymethine Squarylium and Croconium Dyes Squarylium, Croconium계 Polymethine 색소의 합성과 특성
Author	Sung Hoon Kim, Seok Hwan Hwang, Han Chul Song, Nam Sik Yoon 김성훈,황철환,송한철,윤남식
Keywords
Abstract	기능성색소로 응용되는 몇몇 squarylium과 croconium계 색소를 합성한 후 이들의 특성에 관해 조사했다. Squarylium 색소의 경우 5위치에 니트로기의 도입에 의하여 대폭 심색 이동이 관찰되었으며 IR 및 solvatochromism 특성으로부터 중심 4고리의 1,3위치에 indoline환이 결합된 형태이며 기저상태가 극성인 구조를 취하고 있음을 알 수 있었다. 또한 다단계반응에 의해 비대칭 squarylium계 색소를 합성하였다. 중심에 5고리를 가지는 croconium계 색소를 합성하였으며 이들은 770∼780nm에 λmax을 나타냈다. 이들 색소의 구조와 흡수스펙트럼의 관계를 PPP-MO를 사용하여 해석한 결과 실측치와 좋은 상관관계를 나타냈다. The syntheses and absorption spectra of squarylium and croconium dyes were studied. IR data and negative solvatochromism revealed that squarylium dyes have symmetrical 1,3-bonded squarylium rings. A new class of unsymmetrical squarylium dyes and their precursor have also been synthesized. The λmax of croconium dyes undergoes a bathochromic shift of about 100 nm compared with corresponding squarylium dyes. This shift can he calculated by the Pariser-Parr-Pople molecular orbital method.
Page	741 - 747
Full Text	PDF

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