摘要
二苯乙烯类荧光增白剂的NMR测试中,烯键氢都是以单峰形式出现在δ8.0ppm-8.1ppm处,烯键邻位氢向低场偏移0.2ppm-0.6ppm,芳环上的氢有一定溶剂效应,使其产生0.2ppm的高场偏移。在7.68ppm-7.84ppm、7.26ppm-7.29ppm、6.93ppm-6.94ppm处出现这类化合物的特征峰。通过低场δ.>8.5ppm处的活泼氢的数目可以判断苯胺取代基种类;在C—NMR中可根据δ 44ppm-66ppm不同化学位移来确定取代基的种类。
The structures of some stilbene-based fluorescent brighteners were identified by NMR. A single peak of H on the alkylene bond was at 8.0-8. 1ppm, the HNMR of ortho-H on the double bond showed a downfield shift of 0.2-0.6ppm. H on the aromatic ring showed a solvent effect, and an upfield shift of 0.2 ppm. the characteristic peaks of these compounds were at 7.68-7.84 ppm, 7.26-7.29 ppm and 6. 93-6.94 ppm respectively, the substituents are identified according to the amount of active H at δ >8.5ppm in HNMR and the chemical shift 8 44ppm-66ppm.
出处
《染料与染色》
CAS
2003年第1期46-48,共3页
Dyestuffs and Coloration
