Studies on the UV Spectrum of AcBr Lingin from Hardwood Grown in Mt. Jiri

지리산산(智異山産) 활엽수재(闊葉樹材) AcBr(acetyl bromide) Lignin의 UV Spectrum에 대(對)한 고찰(考察)

  • Lee, Dong-Il (College of Agriculture, Gyeongsang National University) ;
  • Moon, Chang-Kuck (College of Agriculture, Gyeongsang National University)
  • Received : 1986.08.20
  • Published : 1986.12.30

Abstract

These experiments were carried out to determine the ultraviolet absorption spectra of AcBr lignins(acetyl bromide lignin) from 10 hardwood species grown in Mt. Jiri. 1. There were 3 peak positions, at 249nm(max. peak), at 262-266nm(shallow min. peak) and at 270-280nm(lower max. peak). The Bj$\ddot{o}$rkman lignin and lignin sulfonatic acid spectra had shoulders, but the AcBr lignin didn't. 2. Average absorbances of the AcBr lignin at peak positions were 0.457${\pm}$0.0077 at 249nm, 0.297${\pm}$0.0029 at 262-266nm and 0.309${\pm}$0.0067 at 270-280nm. 3. Average absorptivities of the AcBr lignin at peak positions were 25.005${\pm}$0.3825 at 249nm, 16.264${\pm}$0.2347 at 262-266nm and 16.863${\pm}$0.3444 at 270-280nm. 4. AcBr lignin absorptivities in each species were as follows: 16.939${\pm}$0.3735 in Acer pseudo-sieboldianum var. koreanum, 17.411${\pm}$0.2937 in Carpinus laxiflora, 16.579${\pm}$0.4348 in Comus controversa, 16.385${\pm}$0.4140 in Fraxinus rhynchophylla, 16.287${\pm}$0.4156 in Meliosma myriantha, 16.492${\pm}$0.1432 in Platycarya strobilacea, 16.343${\pm}$0.3177 in Prunus sargentii, 17.549${\pm}$0.3253 in Sophora japanica, 18.400${\pm}$0.2925 in Stewartia koreana, 16.245${\pm}$0.4339 in Styrax obassia. 5. As the spectra of AcBr lignin from hardwood showed the unpromounced peak from 270nm to 280nm, it was supposed that thes hardwood lignins were the guaiacyl-syringyl copolymers.

지리산(智異山)의 10종(種) 활엽수재에 대(對)한 AcBr(acetyl bromide) lignin의 UV spectrum을 조사(調査)한바 그 결과(結果)을 요약(要約)하면 다음과 같다. 1. 각수종(各樹種) 모두 spectrum curve의 최대정점(最大頂點)은 249nm에, 최소(最少) 정점(頂點)은 262-266nm에, 또 중간정점(中間頂點)은 270-280nm에 있었으며, Bj$\ddot{o}$rkman lignin이나 lignin sulfonic acid 등의 UV spectrum상(上)에서 볼수 있는 견(Shoulder)은 본(本) 연구(硏究)의 활엽수재 AcBr lignin의 spectrum에서는 볼수 없었다. 2. 10개(個) 수종(樹種) 각(各) 정점(頂點)의 평균흡광도(平均吸光度)는 249nm에서 0.457${\pm}$0.0077, 262-266nm에서 0.297${\pm}$0.0029, 280nm에서 0.309${\pm}$0.0067이었다. 3. 10개(個) 수종(樹種) 각(各) 정점(頂點)의 평균흡광계수(平均吸光係數)는 249nm에서 25.005${\pm}$0.3825, 262-266nm에서 16.264${\pm}$0.2347, 280nm에서 16.863${\pm}$0.3444였다. 4. 리그닌의 정량(定量)을 위(爲)한 270-280nm에서의 각(各) 수종별(樹種別) 리그닌의 흡광계수(吸光係數)는 다음과 같았다. 좁은잎단풍나무재(材) 16.939${\pm}$0.3735, 서어나무재(材) 17.411${\pm}$0.2937, 층층나무재(材) 16.579${\pm}$0.4348, 물푸레나무재(材) 16.385${\pm}$0.4140, 나도밤나무재(材) 16.287${\pm}$0.4156, 굴피나무재(材) 16.492${\pm}$0.1432, 산벗나무재(材) 16.343${\pm}$0.3177, 회화나무재(材) 17.549${\pm}$0.3253, 노각나무재(材) 18.400${\pm}$0.2925, 쪽동백 16.245${\pm}$0.4339였다. 5. 270-280nm에서 완만한 흡광도(吸光度) 정점(頂點)을 나타내는 것6으로 보아 본(本) 리그닌은 guaiacyl-syringyl lignin인 것으로 사료(思料)된다.

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