摘要
研究了meso-四(4-N-苄基吡啶基)卟啉(TBPyP)和meso-四(4-甲基-3-磺酸苯基)卟啉(TTPS4)的离解常数。TBPyP的离解常数为:PKa4=1.13,PKa3=1.88,PKa2=12.21;TTPS4的离解常数为:PKa4=4.47,PKa3=6.26。此外还发现了两卟啉的酸碱诱导聚合。
The acid-base equilibria of two water-soluble porphyrins (meso-tetrakis (4-N-benzylpyridinyl) porphyrin(TBPyP), meso-tetrakis (3-sulpho-4-methylphenyl) porphyrin(TTPS4) were investigated spectrophotometrically. The pKa values of the two porphyrins are as follows: pKa4=1.13, pKa3=1.88, pKa2=12. 21 for TBPyP and pKa4=4.47, pKa3=6.26 for TTPS4. The aggregation phenomena by acid-base of the two porphyrins are found in their dilute solutions. TTPS4 is aggregated in acidic solution and TBPyP in basic solution.
出处
《化学试剂》
CAS
CSCD
北大核心
1996年第5期260-262,共3页
Chemical Reagents
基金
河北省自然科学基金
关键词
离解常数
卟啉
自由碱
等吸收点
诱导聚合
dissociation constant
porphyrin free base
isobestic point
induced aggregation