10 種의 N,N-dimethylaniline에 對하여 electronic spectra와 消光常數를 결정하였다. DMA의 $250m{mu}$ (C) banp가 소광의 주원인이 되고 있음을 밝혔고 이 band가 $n{ o}{pi}^{ast}$ band임을 치환기 효과와 용매 효과를 通하여 밝힐 수 있었다. 이 band에 依하여 흡수된 energy는 삼중항 상태로 전이되고 결국은 가장 적은 energy의 삼중항 상태, $^{3}La$로 떨어져 여기서 無복사 충돌에 依하여 energy를 상실케된다.
Electronic spectra and quenching constants for ten N,N-dimethylanilines (DMA) have been determined. The $250m{mu}$ absorption band (C band) of DMA was shown to be mainly responsible for the quenching. This band was confirmed as an $n{ o}{pi}^{ast}$ band through substituent and medium effects on the spectra shifts. The energy absorbed by this band then transfers to triplet and down to the lowest triplet state, $^{3}La$, where the energy is lost by non-radiative collisions.
