环加成
点击化学
化学
叠氮化物
聚合物
光延反应
高分子化学
炔烃
单体
聚乙二醇
差示扫描量热法
聚苯乙烯
酞菁
光化学
有机化学
催化作用
物理
热力学
作者
Muxiu Li,Ezat Khoshdel,David M. Haddleton
出处
期刊:Polymer Chemistry
[The Royal Society of Chemistry]
日期:2013-01-01
卷期号:4 (16): 4405-4405
被引量:14
摘要
Octa-substituted phthalocyanine (Pc) and copper phthalocyanine (CuPc) with different chain lengths of monomethyl ether polyethylene glycol (mPEG) with molecular weights of 350, 550, 750, and up to 2000 g mol−1 were synthesised through combining a phenolic Mitsunobu reaction with Cu(I)-catalysed azide–alkyne cycloaddition (CuAAC) click chemistry. Analysis by GPC shows that narrow polydispersities (PDI ≤ 1.2) of the resultant polymeric derivatives can be achieved; photodiode array (PDA) detection confirms the formation of the desired products. The metal-free Pc polymers are clearly distinguished from polymers functionalised with CuPcs. All PEGylated (Cu)Pc polymers are highly soluble in a range of solvents and show no evidence of aggregation in common organic solvents such as chloroform, DCM, THF, etc. with a split intense Q band between 670 and 690 nm for the mPEG-Pc polymers, and a single Q band at 682 nm for the mPEG-CuPc complexes. The UV-Vis spectra of these polymers in water demonstrate that dimeric complexes are formed in all cases with a minor contribution of monomeric also found in octa-substituted mPEG-CuPc products. More remarkably, the PEGylated (Cu)Pcs with different PEG chain lengths exhibit interesting tunable thermal properties as evidenced by differential scanning calorimetry (DSC).
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